Motorola GP344 Detailed Service Manual
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Motorola GP344 Detailed Service Manual

Motorola GP344 Detailed Service Manual

Compact professional portable radio
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Table of Contents

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See also: Basic Service Manual , User Manual
Compact Professional
Portable Radios
GP344, GP388, GP644, GP688
and GP-R Compact Series
Detailed Service Manual
6864115B63-C
Issue: September 2007

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Summary of Contents for Motorola GP344

  • Page 1 Compact Professional Portable Radios GP344, GP388, GP644, GP688 and GP-R Compact Series Detailed Service Manual 6864115B63-C Issue: September 2007...
  • Page 2 Motorola. Furthermore, the purchase of Motorola products shall not be deemed to grant, either directly or by implication, estoppel or otherwise, any license under the copyrights, patents or patent applications of Motorola, except for the normal non-...
  • Page 3 Compact Professional Portable Radios Detailed Service Manual 6864115B63-C Contents Section 1 Service Maintainability Section 2 Power Distribution, Controller and Keypad Service Information Section 3 VHF Service Information Section 4 UHF1 Service Information Section 5 UHF2 Service Information EMEA Publications Department, Jays Close, Viables Industrial Estate, Basingstoke, Hampshire, RG22 4PD, UK. Issue : July 2007...
  • Page 4 DOCUMENT HISTORY Edition Description Date 6864115B63-C Update to all bands for latest PCB builds Mar 2007 PCB’s added; Mar 2007 8404051G01/G09/G07/G08 8471678L01 8471679L01 8415885H01 841533H02 (VHF) 8471021L01 (VHF) 8486062B12 (VHF) 8404077G01 (UHF1) 8415563H06 (UHF1) 8471441L01 (UHF1) 8404102G08 (UHF2) 8416243H04 (UHF2) 8471475L01 (UHF2) 8485641Z02 (UHF2) UHF Narrow Band (450-470 MHz)
  • Page 5 Compact Professional Portable Radios Service Maintainability Issue: July 2007...
  • Page 6 Accordingly, any copyrighted Motorola computer programs contained in the Motorola products described in this manual may not be copied or reproduced in any manner without the express written permission of Motorola. Furthermore, the purchase of Motorola...

  • Page 7: Safety Information

    Exposure awareness can be facilitated by the use of a product label directing users to specific user awareness information. Your Motorola two-way radio has a RF exposure product label. Also, your Motorola user manual, or separate safety booklet...

  • Page 8: Compliance With Rf Exposure Standards

    Compliance with RF Exposure Standards Your Motorola two-way radio is designed and tested to comply with a number of national and International standards and guidelines (listed below) for human exposure to radio frequency electromagnetic energy. This radio complies with the IEEE (FCC) and ICNIRP exposure limits for occupational/controlled RF exposure environments at operating duty factors of up to 50% talk-50% listen and is authorized by the FCC for occupational use only.
  • Page 9 • When worn on the body, always place the radio in a Motorola-approved clip, holder, holster, case, or body harness for this product. Using approved body-worn accessories is important because the use of non-Motorola-approved accessories may result in exposure levels, which exceed the FCC occupational/controlled environment RF exposure limits.

  • Page 10: Operational Warnings

    • Not carry the radio in the breast pocket. • Use the ear opposite the pacemaker to minimize the potential for interference. • Turn the radio OFF immediately if there is any reason to suspect that interference is taking place. Hearing Aids Some digital wireless radios may interfere with some hearing aids.

  • Page 11: Operational Cautions

    Warnings for Radios Approved as Intrinsically Safe Radios must ship from the Motorola manufacturing facility with the hazardous atmosphere capability and the intrinsic safety approval labelling (FM, UL, CSA, CENELEC). Radios will not be upgraded to...

  • Page 12: Do Not Substitute Options Or Accessories

    REPAIRS FOR MOTOROLA PRODUCTS WITH INTRINSICALLY SAFE APPROVAL ARE THE RESPONSIBILITY OF THE USER. • Repairs to a Motorola FM approved radio product should only be done at a location that has been FM audited under the FM 3605 repairs and service standard.

  • Page 13: Table Of Contents

    2.1 Warranty Period and Return Instructions ............1-1 2.2 After Warranty Period ..................1-1 2.3 European Radio Support Centre (ERSC)............1-2 2.4 Parts Identification and Ordering ..............1-2 2.5 Technical Support...................1-3 2.6 Further Assistance From Motorola ..............1-3 2.7 Related Documents ..................1-3 3.0 Radio Model Information..................1-4 Chapter 2 MAINTENANCE 1.0 Introduction ......................2-1...
  • Page 14 THIS PAGE INTENTIONALLY LEFT BLANK...

  • Page 15: Chapter 1 Introduction

    In instances where the product is covered under a "return for replacement" or "return for repair" warranty, a check of the product should be performed prior to shipping the unit back to Motorola. This is to ensure that the product has been correctly programmed or has not been subjected to damage outside the terms of the warranty.

  • Page 16: European Radio Support Centre (Ersc)

    Some replacement parts, spare parts, and/or product information can be ordered directly. If a complete Motorola part number is assigned to the part, it is available from Motorola Radio Products and Solutions Organization (RPSO). If no part number is assigned, the part is not normally available from Motorola.

  • Page 17: Technical Support

    Warranty and Service Support Technical Support Motorola Product Services is available to assist the dealer/distributors in resolving any malfunctions which may be encountered. North Europe - Stephen Woodrow Central and East Europe - Siggy Punzenberger Telephone: +44 (0) 1256 488 082...

  • Page 18: Radio Model Information

    Type of Model Freq. Power Physical Channel Feature Model Model Protocol Unit Series Band Level Packages Spacing Level Revision Package GP344 4-5W GP344 Program- Conventional GP344 GP344R (136- GP344R mable 5 Tone GP344R GP388 174MHz) GP644 GP644 GP388R GP644R GP644R...

  • Page 19: Chapter 2 Maintenance

    Chapter 2 MAINTENANCE Introduction This chapter of the manual describes: ■ preventive maintenance ■ safe handling of CMOS devices ■ repair procedures and techniques Preventive Maintenance The radios do not require a scheduled preventive maintenance program; however, periodic visual inspection and cleaning is recommended. Inspection Check that the external surfaces of the radio are clean, and that all external controls and switches are functional.

  • Page 20: Safe Handling Of Cmos And Ldmos

    Euro- pean Union’s Waste Electrical and Electronic Equipment (WEEE) Directive 2002/96/ EC and Restriction of Hazardous Subtances (ROHS) Directive 2002/95/EC. To main- tain product compliance and reliability, use only the Motorola specified parts in this man- ual.
  • Page 21 When damaged parts are replaced, identical parts should be used. If the identical replacement component is not locally available, check the parts list for the proper Motorola part number and order the component from the nearest Motorola Communications parts center listed in the “Piece Parts”...
  • Page 22 Chip Components Use either the RLN4062 Hot-Air Repair Station or the Motorola 0180381B45 Repair Station for chip component replacement. When using the 0180381B45 Repair Station, select the TJ-65 mini- thermojet hand piece. On either unit, adjust the temperature control to 370 °C (700 °F), and adjust the airflow to a minimum setting.
  • Page 23 General Repair Procedures and Techniques Shields Removing and replacing shields will be done with the R1070 station with the temperature control set to approximately 215°C (415°F) [230°C (445°F) maximum]. ■ To remove the shield: Place the circuit board in the R1070 circuit board holder. Select the proper heat focus head and attach it to the heater chimney.
  • Page 24 MAINTENANCE THIS PAGE INTENTIONALLY LEFT BLANK...

  • Page 25: Chapter 3 Service Aids

    Chapter 3 SERVICE AIDS Recommended Test Tools Table 3.1 lists the test tools recommended for maintaining this family of radios. These tools are also available from Motorola. Table 3-1 Recommended Test Tools Motorola Part Description Application 6680387A59 Extractor, 2-contact Removal of discrete surface-mounted devices...
  • Page 26 SERVICE AIDS Motorola Part Description Application 6680332E82 Nozzle 20.3 x20.3mm Heat-focus heads for R-1321A work station. 6680332E84 Nozzle 12.7 x12.7mm 6680332E85 Nozzle 12.7 x24.1mm 6680332E90 Nozzle 24.1 x24.1mm ChipMaster Noz- ChipMaster Nozzles zles 6680333E28 PA Nozzle 6680332E83 PLCC-28* Nozzle 6680332E93...

  • Page 27: Test Equipment

    Test Equipment Test Equipment Table 3-2 lists test equipment required to service the radio and other two-way radios. Table 3-2 Test Equipment Motorola Part No. Description Characteristics Application R2600_NT Comms System This monitor will Frequency/deviation meter Analyzer substitute for items with...
  • Page 28 SERVICE AIDS Motorola Part No. Description Characteristics Application S1339_ RF Millivolt Meter 100mV to 3 VRF, RF level measurements 10 kHz to 1.2 GHz R1011_ 220V Power Supply 0-40V, 40A Programmable (Alternate to S1348) S1348_ 220V Power Supply 0-20V, 5A...

  • Page 29: Replacing The Circuit Fuse Board

    Replacing the Circuit Fuse Board Replacing the Circuit Fuse Board In cases where the radio fails to turn on when power is applied, the circuit board fuse should always be checked as a probable cause of the failure. The locations of the fuse for both the UHF and VHF boards are shown in Figure 3-1.

  • Page 30: Removing And Reinstalling The Circuit Board

    SERVICE AIDS Removing and Reinstalling the Circuit Board Both the UHF and VHF circuit boards are removed from the radio chassis in the following manner: 1. Refer to the Basic Service Manual (see Chapter 3- Related Documents) for radio disassembly, then use a philips screwdriver and to remove the four M2X4 screws shown in Figure 3-2.

  • Page 31: Service Aids

    Table 3.3 lists the service aids recommended for working on the radio. While all of these items are available from Motorola, most are standard workshop equipment items, and any equivalent item capable of the same performance may be substituted for the item listed.
  • Page 32 SERVICE AIDS THIS PAGE INTENTIONALLY LEFT BLANK...

  • Page 33: Power Up Self-Test

    Chapter 4 POWER UP SELF-TEST Error Codes Turning on the radio using the ON/OFF volume control starts a self-test routine which checks the RAM, ROM checksum, EEPROM hardware and EEPROM checksum. If these checks are successfully completed, the radio will generate the Self-Test Pass Tone. Radio emits only “bonk” (300 Hz) tone if it fails the self-test.
  • Page 34 POWER UP SELF-TEST THIS PAGE INTENTIONALLY LEFT BLANK...
  • Page 35 Compact Professional Portable Radios Power Distribution, Controller and Keypad Service Information Issue: July 2007...
  • Page 36 Accordingly, any copyrighted Motorola computer programs contained in the Motorola products described in this manual may not be copied or reproduced in any manner without the express written permission of Motorola. Furthermore, the purchase of Motorola...
  • Page 37 3.4 Schematic for Universal Flex GP388/GP688 ..........3-11 3.5 Parts List for Universal Flex GP344/GP644 (8404079G07)......3-12 3.6 Parts List for Universal Flex GP344/GP644 (8415909H01 & 8471612L01) 3-12 3.7 Parts List for Universal Flex GP388/GP688 (8486095Z01) ......3-12 3.8 Parts List for Universal Flex GP388/GP688 (8486095Z02 & 8471698L01) . 3-12 4.0 PCB/Schematic Diagrams and Radio Parts List (RF Board) (EPP) - Radios with...
  • Page 38 THIS PAGE INTENTIONALLY LEFT BLANK...

  • Page 39: Chapter 1 Theory Of Operation

    PCIC(ALC) Ext. RX. Buffer (NU) Vdda *Not applicable to GP344/GP644 SW. Reg. Figure 1-1 DC Power Distribution Block Diagram Figure 1-1 illustrates the DC distribution throughout the radio board. A 7.5V battery (BATT 7.5V) supplies power directly to the electronic ON/OFFcontrol as UNSWB+. When the radio is turned on, MECH_SWB+ (ON/OFF volume control) will trigger the electronic ON/OFFcontrol(momentary-on path), then SWB+ is distributed as shown in Figure Figure 1-1.

  • Page 40: Controller Board

    The controller board is the central interface between the various subsytems of the radio. It is separated into digital and audio architectures. The digital portion consists of a special Motorola microcontroller (HC11FL0). The audio power amplifier (Audio PA) and audio/signalling/filter/ companding IC (ASFIC_CMP) form the backbone of the audio/signalling architecture.

  • Page 41: Digital Architecture

    Digital Architecture MCU configuration There is one common MCU architecture for low-tier as well as for the high-tier products. It covers the Conventional and Trunking portables. An open architecture system with the new HC11FL0 as the processor is used. Combinations of different size RAM, ROM and EEPROM are available for various application software.

  • Page 42: Keypad

    THEORY OF OPERATION ModB/Vstby Supply Under various conditions, the supply to the ModB/Vstby would vary. Table Table 1-1 shows these conditions and circuits in operation. Table 1-1 ModB/Vstby Supply Modes Condition Circuit Operation Radio On Vdd supply voltage via CR411 Radio Off •...

  • Page 43: Chapter 2 Troubleshooting Charts

    Chapter 2 TROUBLESHOOTING CHARTS Troubleshooting Charts (includes Controller and Keypad) This section contains detailed troubleshooting charts. These charts should be used as a guide in determining the problem areas. They are not a substitute for knowledge of circuit operation and astute troubleshooting techniques.
  • Page 44 TROUBLESHOOTING CHARTS MCU Check Press PTT. Red LED does not Before replacing light up Not able to Power Up MCU, check SPI Audio at program RF Alert Tone AUDIO clock, SPI data, AudioPA Board ICs J403 Audio and RF IC select (U420) input at Pin 2 &...
  • Page 45 Troubleshooting Charts (includes Controller and Keypad) START Bad SINAD Bad 20dB Quieting No Recovered Audio Audio at pin 27 of Check Controller U3220? Spray of inject 1st IF into XTAL Filter IF Freq: 45.1MHz Check Q3270 bias circuitry for faults. Audio heard? Rotate Freq.
  • Page 46 TROUBLESHOOTING CHARTS Inject RF into J3501 Q3200 collector Trace IF signal from IF Signal at C3200 to Q3200. Check C3200? IF signal present? for bad XTAL filter. Before replacing U3220, check U3220 voltages; trace IF 1st LO O/P OK? RF Signal at signal path.
  • Page 47 Troubleshooting Charts (includes Controller and Keypad) MCU Check Press PTT. Red LED does not Before replacing light up Power Up Not able to MCU, check SPI Audio at Alert Tone program RF AUDIO clock, SPI data, AudioPA (U420) Board ICs J403 Audio and RF IC select input...
  • Page 48 TROUBLESHOOTING CHARTS START No Power Is There B+ Bias for Check Q111 Ant switch Is Control Voltage High Check PCIC Is Current OK? or Low High Check Drive to Module 1. Check Pin Diodes 2. Check Harmonic Filter Is Drive OK? Troubleshoot VCO Inspect/Repair Tx.
  • Page 49 Troubleshooting Charts (includes Controller and Keypad) 3.3V at Check U248, Start U201 pins L201 & L202 5, 20, 34 & Check CR201, Visual U210, U211, Correct check of the C258, C259 & Problem Board OK? C228 16.8MHz Is 16.8MHz Replace at pin 6 signal at Signal at...
  • Page 50 TROUBLESHOOTING CHARTS START Change U241 No LO? L253 O/C? Change L253 TRB = 5V? Pin 10 >1V? Tx Carrier? VCO OK Check R245 for dry joint or faulty AUX 3 High? Check R260 Check U201 Pin 2 for 3.2V Change L243 V ctrl 0V or 13V? L243 Open Cir-...
  • Page 51 Troubleshooting Charts (includes Controller and Keypad) Disconnect and reconnect 18-pin Display flex IF STILL OFF Disconnect and Keypad reconnect 40-pin flex Figure 2-8 Trouble Shooting Flowchart - Keypad...
  • Page 52 2-10 TROUBLESHOOTING CHARTS THIS PAGE INTENTIONALLY LEFT BLANK...

  • Page 53: Allocation Of Pcbs And Schematic Diagrams

    CHAPTER 3 CONTROLLER/KEYPAD SCHEMATICS Allocation of PCBs and Schematic Diagrams The Controller schematic diagrams and the related PCBs are shown below. Also included in this chapter are the Keypad/Controller to RF Board Interconnector Flex and the Universal Connector Flex. Notes For All Schematics and Circuit Boards Table 3-1 PCBs and Schematics PCBs Keypad/Controller-RF Board Interconnect Flex...
  • Page 54 CONTROLLER/KEYPAD SCHEMATICS SCHEMATICS (8404051G01) Complete Controller Schematic (G01) Page 3-15 Controller ASFIC/ON_OFF Schematic (G01) Page 3-16 Controller Microprocessor Schematic (G01) Page 3-17 Controller Memory Schematic(G01) Page 3-18 Controller Audio Power Amplifier Schematic (G01) Page 3-19 Controller Interface Schematic (G01) Page 3-20 SCHEMATICS (8415530H01/8404056G01/G02) Complete Controller Schematic Page 3-27...

  • Page 55: Flex Layout Rev O Schematic

    Keypad/Controller-RF Board Interconnect Flex Keypad/Controller-RF Board Interconnect Flex Flex Layout Rev A Schematic CONTROLLER KEYPAD J200 J400 EXT_MIC EXT_MIC VS_CS VS_CS SW_B+ SW_B+ Vddd Vddd VS_AUDSEL VS_AUDSEL Det_Aud_Snd Det_Aud_Snd Rx_Aud_Rtn Rx_Aud_Rtn Tx_Aud_Snd Tx_Aud_Snd Tx_Aud_Rtn Tx_Aud_Rtn Flat_Tx_Rtn Flat_Tx_Rtn Opt_Bd_En Opt_Bd_En Rdy/Req Rdy/Req Rx_Aud_Snd Rx_Aud_Snd...

  • Page 56: Parts List For Keypad/Controller - Rf Board Interconnect Flex

    CONTROLLER/KEYPAD SCHEMATICS Parts List for Keypad/Controller - RF Board Interconnect Flex Reference Symbol Motorola Part No Description J200 0905505Y04 Connector, 40pin J400 090242P03 Connector, 40pin Flex Layout Rev A <- TO CTRL Front Metal View From Top Side TO RF ->...

  • Page 57: Flex Layout Rev O

    Keypad/Controller-RF Board Interconnect Flex Flex Layout Rev O Front Metal View From Top Side <- TO RF 8415637H01 Rev O TO CTRL -> Table 3-3 Keypad/Controller - RF Board Interconnect Flex (Rev O)

  • Page 58: Universal Connector Flex

    CONTROLLER/KEYPAD SCHEMATICS Universal Connector Flex Flex for GP344/GP644 M400 M401 C402 P403 Front Metal Back Metal View From Front Side View From Back Side...
  • Page 59 Universal Connector Flex M 4 0 0 P 4 0 3 Front Metal Back Metal View From Front Side View From Back Side (for 8471612L01) (for 8471612L01)

  • Page 60: Flex For Gp388/Gp688

    CONTROLLER/KEYPAD SCHEMATICS Flex GP388/GP688 J416 J415 J414 J413 J412 J411 M401 J410 J409 J408 J407 J406 J405 J404 P403 Front Metal Back Metal View From Front Side View From Back Side...
  • Page 61 Universal Connector Flex J 4 0 4 J 4 0 5 J 4 0 6 M 4 0 0 J 4 0 7 M 4 0 1 J 4 0 8 J 4 0 9 J 4 1 0 J 4 1 1 J 4 1 2 J 4 1 3 J 4 1 4...
  • Page 62 3-10 CONTROLLER/KEYPAD SCHEMATICS Schematic for Universal Connector Flex GP344/GP644 M400 SPKR_20 J403 20 PIN CONN SPKR_20 INT_SPK+ 13 PIN UNIVERSAL CONN INT_SPK- SPKR_20 EXT_SPKR+ J404 EXT_SPKR+ SPKR_20 EXT_SPK- J405 EXT_SPK- OPT_B+30 DPT_B+ OPT_B+ J406 EXT_MIC EXT_MIC J407 OPT_SEL_2 OPT_SEL_2 J408...

  • Page 63: Parts List For Universal Flex Gp344/Gp644 (8404079G07)

    Description Symbol Part No. C402 2113740A55 Cap, 100pF M400 5005679X01 Speaker, 24 ohm M401 5013920A04 Mic, Mini electrec Parts List for Universal Connector Flex GP344/GP644 (8415909H01 & 8471612L01) Reference Motorola Description Symbol Part No. C402 2113944F01 Cap, 100pF M400 5005679X07...
  • Page 64 3-12 CONTROLLER/KEYPAD SCHEMATICS...
  • Page 65 PCB and Schematic Diagrams - Radios with Keypad and Display (EPP) 3-13 PCB/Schematic Diagrams and Radio Parts List (RF Board) - Radios with Keypad and Display (EPP) M604 M605 M606 D601 D602 R620 R621 M607 M608 M609 M610 M611 M612 D605 D604 R618...
  • Page 66 3-14 PCB and Schematic Diagrams - Radios with Keypad and Display (EPP) E638 E639 E640 C750 E641 E642 E643 E644 J702 C751 R492 E645 E634 C424 R408 C613 E703 E702 E637 R428 C610 C429 R410 R632 C611 R463 C612 C616 R602 R601 R646...

  • Page 67: 8404051G01

    PCB and Schematic Diagrams - Radios with Keypad and Display (EPP) 3-15 100pF 100pF 100pF 100pF 100pF 100pF 100pF C714 C712 C710 C708 C706 C704 C702 100pF 100pF 100pF 100pF 100pF 100pF 100pF 100pF C715 C713 C711 C709 C707 C705 C703 C701 J400...
  • Page 68 3-16 PCB and Schematic Diagrams - Radios with Keypad and Display (EPP) BCX71KL SWB+ 4809579E18 (3.3V) Vddd Q400 TP406 UNSWB+ C401 C400 0.1uF .01uF R406 U400 LP2951ACMM-3.3 C402 C403 0.1uF 10uF INPUT OUTPUT 1 BATT_CODE Vddd FEEDBACK ERROR 5 SHUTDOWN SENSE 2 VTAP 6 R427...
  • Page 69 PCB and Schematic Diagrams - Radios with Keypad and Display (EPP) 3-17 Vddd F1200 R457 R409 SCI_TX SCI_RX TP401 TP402 TEST_POINT TEST_POINT R418 UNSWB+ Vddd Vddd Vddd R437 100K C730 C431 C449 C453 C423 100pF 100pF 100pF 100pF 100pF U410 L411 ILC7062CM-33 3.3V...
  • Page 70 3-18 PCB and Schematic Diagrams - Radios with Keypad and Display (EPP) Vddd C426 C425 100pF 0.1uF Used for Trunking only. U405 5102463J36 CY62256VLL RAM_CS R428 FLASH_OE Vddd C424 10uF R410 2311049A59 100K C429 0.1uF R478 XA18 U406 R408 AT49HLV010 100K 5102463J59 FLASH_EN...
  • Page 71 PCB and Schematic Diagrams - Radios with Keypad and Display (EPP) 3-19 MMBZ5240B 4880140L15 x 5pcs. UNSWB+ OPT_SEL2 SWB+ C475 OPT_SEL1 VR449 10uF VR446 VR447 VR448 VR445 R473 R450 J403 0909059E04 C471 20 PIN CONN 5102463J44 C442 C472 100pF R499 U420 0.1uF R423...
  • Page 72 3-20 PCB and Schematic Diagrams - Radios with Keypad and Display (EPP) J702 16 PINS CONNECTOR P/N.0905505Y03 R721 R632 J702-1 MOSI 4813824A10 DATA R722 100K J702-2 ROW3 ROW4 ROW5 MMBT3904L 100K J702-3 100K R633 M604 M605 M606 J702-4 100K Q603 SWITCH SWITCH SWITCH...
  • Page 73 PCB and Scematic Diagrams - Radios with Keypad and Display (EPP) 3-21 PCB/Schematic Diagrams and Radio Parts List (RF Board) - Radios with Keypad and Display (EPP) TP415 TP405 TP401 TP402 TP410 TP406 Controller Board Top View PCB No. 8415530H01...
  • Page 74 PCB and Scematic Diagrams - Radios with Keypad and Display (EPP) 3-22 E638 E402 E639 E403 E640 E404 E641 E405 E642 C750 E406 E643 E407 E644 R492 C751 E408 E645 E409 E634 E701 E703 E702 E637 R408 R428 C613 R410 R632 C611 C610...
  • Page 75 PCB and Scematic Diagrams - Radios with Keypad and Display (EPP) 3-23 M605 M604 M606 D601 D602 R620 R621 M607 M608 M609 M610 M611 M612 D605 D604 R618 R619 M614 M615 M613 M617 M618 M616 D606 ZMY0130800-O D603 R623 R622 M619 M620 M621...
  • Page 76 PCB and Scematic Diagrams - Radios with Keypad and Display (EPP) 3-24 E638 E639 E640 C750 E641 E642 E644 E643 J702 C751 R492 E645 E634 C424 R408 E637 C613 E703 E702 R428 C610 C429 R410 R632 C611 R463 C612 C616 R602 R601 R646...
  • Page 77 PCB and Scematic Diagrams - Radios with Keypad and Display (EPP) 3-25 TP406 TP410 TP402 TP401 TP405 TP415 Controller Board Top View PCB No. 8404056G02...
  • Page 78 PCB and Scematic Diagrams - Radios with Keypad and Display (EPP) 3-26 E403 E640 E638 E402 E639 C750 E641 E405 E642 E404 E406 E643 E407 E644 C751 R492 E408 E645 E409 E634 E701 R408 C613 E703 E702 E637 R428 C610 C429 R410 R632...

  • Page 79: 8415530H01/8404056G01/G02

    PCB and Scematic Diagrams - Radios with Keypad and Display (EPP) 3-27 100pF 100pF 100pF 100pF 100pF 100pF 100pF C714 C712 C710 C708 C706 C704 C702 100pF 100pF 100pF 100pF 100pF 100pF 100pF 100pF C715 C713 C711 C709 C707 C705 C703 C701 J400...
  • Page 80 PCB and Scematic Diagrams - Radios with Keypad and Display (EPP) 3-28 BCX71KL SWB+ 4809579E18 (3.3V) Vddd Q400 TP406 UNSWB+ C401 C400 0.1uF .01uF R406 U400 LP2951ACMM-3.3 C402 C403 0.1uF 10uF OUTPUT 1 INPUT BATT_CODE Vddd FEEDBACK ERROR 5 SHUTDOWN SENSE 2 VTAP 6 R427...
  • Page 81 PCB and Scematic Diagrams - Radios with Keypad and Display (EPP) 3-29 Vddd F1200 R457 R409 SCI_TX SCI_RX TP401 TP402 TEST_POINT TEST_POINT R418 UNSWB+ Vddd Vddd Vddd R437 100K C730 C431 C449 C453 C423 100pF 100pF 100pF 100pF 100pF U410 L411 ILC7062CM-33 3.3V...
  • Page 82 PCB and Scematic Diagrams - Radios with Keypad and Display (EPP) 3-30 Vddd C426 C425 100pF 0.1uF Used for Trunking only. U405 5102463J36 CY62256VLL RAM_CS R428 FLASH_OE Vddd C424 10uF R410 2311049A59 100K C429 0.1uF R478 XA18 U406 R408 AT49HLV010 100K 5102463J59 FLASH_EN...
  • Page 83 PCB and Scematic Diagrams - Radios with Keypad and Display (EPP) 3-31 MMBZ5240B 4880140L15 x 5pcs. UNSWB+ OPT_SEL2 SWB+ C475 OPT_SEL1 VR448 VR449 10uF VR446 VR447 VR445 R473 R450 J403 0909059E04 C471 20 PIN CONN 5102463J44 C442 C472 100pF R499 U420 0.1uF R423...
  • Page 84 PCB and Scematic Diagrams - Radios with Keypad and Display (EPP) 3-32 J702 16 PINS CONNECTOR P/N.0905505Y03 R721 R632 J702-1 MOSI 4813824A10 DATA R722 100K J702-2 ROW3 ROW4 ROW5 MMBT3904L 100K J702-3 100K M604 M605 M606 R633 J702-4 Q603 SWITCH SWITCH SWITCH 100K...
  • Page 85 Radio Parts List (RF Board) - Radios with Keypad and Display (EPP) 3-33 UHF1 Radio Parts List (RF Board) Circuit Motorola Circuit Motorola Circuit Motorola Description‘ Description‘ Description‘ (EPP) 8415530H01 Part No. Part No. Part No. C437 2113944A29 CAP CER CHP 22.0PF 50V...
  • Page 86 3-34 Radio Parts List (RF Board) - Radios with Keypad and Display (EPP) Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description‘ Description‘ Description‘ Description‘ Part No. Part No. Part No. Part No. E402 2480640Z01 SURFACE MOUNT FERRITE L400 2414017Q42...
  • Page 87 Note: E401 through E409 are NOT PLACED in R609 0613952N62 CER CHIP RES 43.2K OHM NUMBER 8404056G01. 1% 0402 U400 5115012H01 IC,ADJ LOW * Motorola Depot Servicing only R610 0613952P12 CER CHIP RES 130K OHM DROPOUT,,SM,,,,,,,,POS P 1% 0402 U404 5115062H01 IC,CUST,,,,TQFP48 R611...
  • Page 88 PCB and Scematic Diagrams - Radios with Keypad and Display (EPP) 3-36 THIS PAGE INTENTIONALLY LEFT BLANK...
  • Page 89 Radio Parts List (RF Board) - Radios with Keypad and Display (EPP) 3-37 VHF Radio Parts List (RF Board) (EPP) Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description 8415530H01 Part No. Part No. Part No. C440 2113946Q01 CAP CER CHP 4.7UF 16V...
  • Page 90 3-38 Radio Parts List (RF Board) - Radios with Keypad and Display (EPP) Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Part No. Part No. Part No. Part No. E404 2480640Z01 SURFACE MOUNT FERRITE L410 2414017Q42...
  • Page 91 0613952Q73 CER CHIP RES 1000 OHM 4086199Z02 ACTR,ADHESIVE 5% 0402 BACK,PLASTIC/MOL R622 0613952Q73 CER CHIP RES 1000 OHM * Motorola Depot Servicing only 5% 0402 R623 0613952Q73 CER CHIP RES 1000 OHM ** Not Servicable 5% 0402 R632 0613952R25 CER CHIP RES 100K OHM...
  • Page 92 PCB and Scematic Diagrams - Radios with Keypad and Display (EPP) 3-40 THIS PAGE INTENTIONALLY LEFT BLANK...
  • Page 93 Radio Parts List (RF Board) - Radios with Keypad and Display (EPP) 3-41 UHF Narrow Band and 330MHz Radio Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Parts List for 8415530H01 Part No. Part No. Part No. C437 2113944A29 CAP CER CHP 22.0PF 50V...
  • Page 94 3-42 Radio Parts List (RF Board) - Radios with Keypad and Display (EPP) Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Part No. Part No. Part No. Part No. E405 2480640Z01 SURFACE MOUNT FERRITE L411 2414017Q42...
  • Page 95 Radio Parts List (RF Board) - Radios with Keypad and Display (EPP) 3-43 Circuit Motorola Circuit Motorola Description Description Part No. Part No. R608 0613952Z58 RES,MF,22KOHM,1%, U407 5115033H01 IC,EEPROM,16K X 8,SM .0625W,SM,0402,200 U409 5185143E03 IC,MICROP,QFP,QFP100, R609 0613952N62 CER CHIP RES 43.2K OHM 3.7MHZ...
  • Page 96 PCB and Scematic Diagrams - Radios with Keypad and Display (EPP) 3-44 THIS PAGE INTENTIONALLY LEFT BLANK...
  • Page 97 Radio Parts List (RF Board) - Radios with Keypad and Display (EPP) 3-45 VHF Radio Parts List (RF Board) (EPP) Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description 8404056G01/G02 Part No. Part No. Part No. C473 2113743L09 470 pF, 10%...
  • Page 98 13 k, 1% Note: E401 through E409 are NOT PLACED in R604 0662057V11 22 k, 1% 84D04056G01 R605 0662057V18 43 k, 1% * Motorola Depot Servicing only R606 0662057V30 130 k, 1% R607 0662057V05 13 k, 1% R608 0662057V11 22 k, 1%...
  • Page 99 Radio Parts List (RF Board) - Radios with Keypad and Display (EPP) 3-47 UHF Radio Parts List (RF Board) (EPP) Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description 8404056G01/G02 Part No. Part No. Part No. C475 2113743H14 10.0 uF, +80% / -20%...
  • Page 100 51 k, 1% Note: E401 through E409 are NOT PLACED in R603 0662057V05 13 k, 1% 8404056G01 R604 0662057V11 22 k, 1% * Motorola Depot Servicing only R605 0662057V18 43 k, 1% R606 0662057V30 130 k, 1% R607 0662057V05 13 k, 1%...
  • Page 101 PCB and Schematic Diagrams IP67 3-49 VHF PCB/Scematic Diagrams and Radio Parts List (RF Radio) - Radios with Keypad Display IP67 Q6002 Q6003 Q6006 Q6001 C6003 C6002 C6006 C6001 Q6004 Q6009 S6001 S6002 S6003 Q6005 Q6011 C6007 C6012 Q6007 Q6012 S6004 S6005 S6006...
  • Page 102 3-50 PCB and Schematic Drawings IP67 E403 E638 E402 E639 E640 C750 E404 E641 E405 E642 E406 E643 E407 E644 C751 E408 E645 E409 E634 R492 E701 E637 R408 R428 C610 C613 E703 E702 R410 R632 C611 C429 R463 C612 R602 C616 R603...
  • Page 103 PCB and Schematic Diagrams IP67 3-51 S6001 S6003 S6004 S6005 S6006 Q6002 C6006 C6002 Q6003 TP406 TP410 TP402 TP401 TP405 TP415 Controller Board Top View PCB No. 8471679L01...
  • Page 104 3-52 PCB and Schematic Drawings IP67 E639 E638 E402 E403 E640 C750 E404 E641 E405 E642 E406 E643 E407 E644 C751 R492 E408 E409 E634 E645 R408 C613 E703 E702 E637 E701 R428 C429 R410 R632 C611 C610 R463 C612 C616 R602 R601...

  • Page 105: 8471678L01 & 8471679L01 (Ip67)

    PCB and Schematic Diagrams IP67 3-53 470pF 470pF 470pF 470pF 470pF 470pF 470pF C714 C712 C710 C708 C706 C704 C702 470pF 470pF 470pF 470pF 470pF 470pF 470pF 470pF C715 C713 C711 C709 C707 C705 C703 C701 J400 TO/FROM RF 0902042P03 J400-33 RED_LED RED_LED...
  • Page 106 3-54 PCB and Schematic Drawings IP67 BCX71KL SWB+ (3.3V) 4809579E18 Vddd Q400 TP406 UNSWB+ C401 C400 0.1uF .01uF R406 U400 LP2951ACMM-3.3 C402 C403 0.1uF 10uF BATT_CODE INPUT OUTPUT Vddd FEEDBACK ERROR SHUTDOWN SENSE VTAP R427 RB731U 2.7K TP410 4802245J62 CR412 R476 C410 0.1uF...
  • Page 107 PCB and Schematic Diagrams IP67 3-55 Vddd F1200 R457 R409 SCI_TX SCI_RX TP401 TP402 TEST_POINT TEST_POINT R418 UNSWB+ Vddd Vddd Vddd R437 100K C730 C431 C449 C453 C423 470pF 470pF 470pF 470pF 470pF 5102463J57 U410 L411 ILC7062CM-33 3.3V 390nH VOUT L410 390nH C456...
  • Page 108 3-56 PCB and Schematic Drawings IP67 Vddd C426 C425 100pF 0.1uF Used for Trunking only. U405 5102463J36 CY62256VLL RAM_CS R428 FLASH_OE Vddd C424 10uF R410 2311049A59 100K C429 0.1uF R478 XA18 U406 R408 AT49HLV010 100K 5102463J59 FLASH_EN EN_CE R492 EN_OE EN_WE ZMY0130819-O XA18...
  • Page 109 PCB and Schematic Diagrams IP67 3-57 MMBZ5240B 4880140L15 x 5pcs. UNSWB+ OPT_SEL2 SWB+ OPT_SEL1 C475 VR448 VR449 VR446 VR447 10uF VR445 R473 R450 J403 0909059E04 20 PIN CONN 5102463J44 C442 C471 0.1uF 470pF C472 U420 R423 470pF C473 R499 TDA8547 J403-1 470pF C447...
  • Page 110 3-58 PCB and Schematic Drawings IP67 ROW3 ROW4 ROW5 S6003 S6001 S6002 SWITCH SWITCH SWITCH C6001 C6002 C6003 100pF 100pF 100pF Vddd_sw Vddd_sw Vddd_sw COL5 KEYPAD_ROW S6004 S6005 S6006 SWITCH SWITCH SWITCH J702 16 PINS CONNECTOR P/N.0905505Y03 C6004 C6005 C6006 R721 100pF 100pF...
  • Page 111 PCB and Schematic Diagrams IP67 3-59 ROW3 ROW4 ROW5 S6003 SWITCH S6001 S6002 SWITCH SWITCH C6001 C6002 C6003 100pF 100pF 100pF Vddd_sw Vddd_sw Vddd_sw COL5 KEYPAD_ROW S6004 S6005 S6006 SWITCH SWITCH SWITCH J702 16 PINS CONNECTOR P/N.0905505Y03 C6004 C6005 C6006 R721 100pF 100pF...
  • Page 112 3-60 PCB and Schematic Drawings IP67 THIS PAGE INTENTIONALLY LEFT BLANK...
  • Page 113 Radio Parts List (RF Radio) IP67 3-61 VHF Radio Parts List (RF Board) IP67 Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description 8471678L01 and 8471679L01 Part No. Part No. Part No. C436 2113944A29 CAP CER CHP 22.0PF 50V C493...
  • Page 114 3-62 Radio Parts List (RF Radio) IP67 Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Part No. Part No. Part No. Part No. C723 2113945A05 CAP CER CHP 470PF 50V E637 2480640Z01 SURFACE MOUNT FERRITE Q6001...
  • Page 115 0613952Q73 CER CHIP RES 1000 OHM 5 NUMBER OT-23,10 0402 0402 S6015 NOTPLACED GCAM DUMMY PART * Motorola Depot Servicing only R477 0613952Q73 CER CHIP RES 1000 OHM 5 R622 0613952Q73 CER CHIP RES 1000 OHM 5 NUMBER ** Not Servicable...
  • Page 116 3-64 PCB and Schematic Drawings IP67 THIS PAGE INTENTIONALLY LEFT BLANK...
  • Page 117 Radio Parts List (RF Radio) IP67 3-65 UHF Radio Parts List (RF Radio) Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description 8471678L01 Part No. Part No. Part No. C434 2113946K02 CAP CER CHP 0.10UF 16V C492 2113944A40 CAP CER CHP 100.0PF 50V...
  • Page 118 3-66 Radio Parts List (RF Radio) IP67 Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Part No. Part No. Part No. Part No. C722 2113944A40 CAP CER CHP 100.0PF 50V E634 2480640Z01 SURFACE MOUNT FERRITE Q417...
  • Page 119 RF/CONT, FLEX FOR AOBA R478 0613952R01 CER CHIP RES 10K OHM 5% R623 0613952Q73 CER CHIP RES 1000 OHM 5 NUMBER * Motorola Depot Servicing only 0402 0402 S6017 NOTPLACED GCAM DUMMY PART ** Not Servicable R479 0613952Q66 CER CHIP RES 510 OHM 5...
  • Page 120 3-68 PCB and Schematic Drawings IP67 THIS PAGE INTENTIONALLY LEFT BLANK...
  • Page 121 PCB and Schematic Diagrams - Radios without Keypad and Display 3-69 PCB/Schematic Diagrams and Radio Parts List (RF Board) - Radios without Keypad and Display R410 R411 C453 C456 R492 R408 R702 R437 U405 R701 R418 R478 C429 C433 R415 R414 C421 C426...
  • Page 122 3-70 PCB and Schematic Diagrams - Radios without Keypad and Display C731 C733 C732 C734 SH400 U406 U409 C440 U404 U420 RT400 C480 C475 Q410 C452 U407 U400 CR412 ZMY0130795-O J400 J403 Controller Board Bottom View PCB No.8404051G07/G08...
  • Page 123 PCB and Schematic Diagrams - Radios without Keypad and Display 3-71 R410 R411 C453 C456 R492 R408 R702 R437 R701 R418 R478 C429 C433 R415 R414 C426 C425 C419 C444 R435 C421 C420 C481 C730 R413 R434 C416 R481 R445 C423 C422 R425...
  • Page 124 3-72 PCB and Schematic Diagrams - Radios without Keypad and Display C733 C731 C734 C732 SH400 U406 C440 U404 RT400 C480 C475 C452 U407 U400 CR412 J403 Controller Board Bottom View PCB No. 8404051G09...

  • Page 125: 8404051G07/G08/G09

    PCB and Schematic Diagrams - Radios without Keypad and Display 3-73 C710 C714 C712 C708 C706 C704 C702 100pF 100pF 100pF 100pF 100pF 100pF 100pF C715 C703 C701 C713 C711 C709 C707 C705 100pF 100pF 100pF 100pF 100pF 100pF 100pF 100pF J400 TO/FROM RF...
  • Page 126 3-74 PCB and Schematic Diagrams - Radios without Keypad and Display 4809579E18 SWB+ (3.3V) BCX71KL Vddd Q400 TP406 BATT_CODE Vddd UNSWB+ C401 C400 0.1uF .01uF R406 R427 2.7K U400 RB731U LP2951ACMM-3.3 C402 C403 4802245J62 0.1uF 10uF CR412 INPUT OUTPUT BATT_DATA_IN FEEDBACK ERROR SHUTDOWN...
  • Page 127 PCB and Schematic Diagrams - Radios without Keypad and Display 3-75 Vddd F1200 R457 R409 SCI_TX SCI_RX TP401 TP402 TEST_POINT TEST_POINT R418 Vddd Vddd Vddd R437 C730 C431 C449 C453 C423 100pF 100pF 100pF 100pF 100pF L411 390nH L410 390nH C456 R411 100pF...
  • Page 128 3-76 PCB and Schematic Diagrams - Radios without Keypad and Display Vddd C426 C425 100pF 0.1uF Used for Trunking only. U405 CY62256VLL RAM_CS R428 FLASH_OE Vddd C424 10uF R410 2311049A59 100K C429 0.1uF R478 XA18 R702 U406 AT49HLV010 R408 FLASH_EN EN_CE R492 EN_OE...
  • Page 129 PCB and Schematic Diagrams - Radios without Keypad and Display 3-77 MMBZ5240B 4880140L15 x 5pcs. UNSWB+ OPT_SEL2 SWB+ C475 OPT_SEL1 VR449 VR446 VR447 VR448 10uF VR445 R473 R450 J403 20 PIN CONN 0909059E04 C471 C442 470pF C472 U420 R499 0.1uF R423 470pF TDA8547...
  • Page 130 3-78 PCB and Schematic Diagrams - Radios without Keypad and Display THIS PAGE INTENTIONALLY LEFT BLANK...
  • Page 131 VR450 4880140L15 10V Zener C440 2113743G26 4.7 uF, +80% / -20% C722 2113743L09 470 pF, 10% R437 NOT PLACED * Motorola Depot Servicing only C441 2113743L09 470 pF, 10% C723 2113743L09 470 pF, 10% R445 0662057N08 24 k, 5% C442 2113743E20 0.10 uF, 10%...
  • Page 132 3-80 PCB and Schematic Diagrams - Radios without Keypad and Display THIS PAGE INTENTIONALLY LEFT BLANK...
  • Page 133 VR450 4880140L15 10V Zener C440 2113743G26 4.7 uF, +80% / -20% C722 2113743N50 100 pF, 5% R437 NOT PLACED * Motorola Depot Servicing only C441 2113743N50 100 pF, 5% C723 2113743N50 100 pF, 5% R445 0662057N08 24 k, 5% C442 2113743E20 0.10 uF, 10%...
  • Page 134 3-82 PCB and Schematic Diagrams - Radios without Keypad and Display THIS PAGE INTENTIONALLY LEFT BLANK...
  • Page 135 PCB and Schematic Diagrams - Radios without Keypad and Display (EPP) 3-83 PCB/Schematic Diagrams and Radio Parts List (RF Board) - Radios without Keypad and Display (EPP) C453 C456 R411 R410 R492 R408 R702 R437 R701 R418 R478 C429 C433 R415 R414 R435...
  • Page 136 3-84 PCB and Schematic Diagrams - Radios without Keypad and Display (EPP) C731 C733 C732 C734 C499 U406 C440 U404 C480 RT400 C475 C452 SH400 U407 U400 CR412 J403 J400 Controller Board Bottom View PCB No. 8415885H01...

  • Page 137: 8415885H01

    PCB and Schematic Diagrams - Radios without Keypad and Display (EPP) 3-85 Complete Controller Schematic Diagram 8415885H01...
  • Page 138 3-86 PCB and Schematic Diagrams - Radios without Keypad and Display (EPP) Controller ASFIC/ON_OFF Schematic Diagram 8415885H01...
  • Page 139 PCB and Schematic Diagrams - Radios without Keypad and Display (EPP) 3-87 Controller Micro Processor Schematic Diagram 8415885H01...
  • Page 140 3-88 PCB and Schematic Diagrams - Radios without Keypad and Display (EPP) Controller Memory Schematic Diagram 8415885H01...
  • Page 141 PCB and Schematic Diagrams - Radios without Keypad and Display (EPP) 3-89 6.2K Controller Audio Power Amplifier Schematic Diagram 8415885H01...
  • Page 142 3-90 PCB and Schematic Diagrams - Radios without Keypad and Display (EPP) THIS PAGE INTENTIONALLY LEFT BLANK...
  • Page 143 Radio Parts List (RF Board) - Radios without Keypad and Display (EPP) 3-91 VHF Radio Parts List (RF Board) (EPP) Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description 8415885H01 Part No. Part No. Part No. C444 2113945A05 CAP CER CHP 470PF 50V...
  • Page 144 10V ZENER 0402 VR449 4813977M19 10V ZENER R460 0613952Q89 CER CHIP RES 4700 OHM VR450 4813977M19 10V ZENER 5% 0402 8415885H01 CONTROLLER PCB AOBA R463 0613952Q60 CER CHIP RES 300 OHM 5% 0402 * Motorola Depot Servicing only ** Not Serviceable...
  • Page 145 Radio Parts List (RF Board) - Radios without Keypad and Display (EPP) 3-93 Controller Parts List for UHF1, UHF2, Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description UHF Narrow Band and 330MHz Part No. Part No. Part No. 8415885H01...
  • Page 146 3-94 Radio Parts List (RF Board) - Radios without Keypad and Display (EPP) Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Part No. Part No. Part No. R416 0613952R01 CER CHIP RES 10K OHM 5% R471 0613952R08 CER CHIP RES 20K OHM...
  • Page 147 Compact Professional Portable Radios VHF (136-174MHz) Service Information Issue: July 2007...
  • Page 148 Accordingly, any copyrighted Motorola computer programs contained in the Motorola products described in this manual may not be copied or reproduced in any manner without the express written permission of Motorola. Furthermore, the purchase of Motorola...
  • Page 149 Table of Contents Chapter 1 THEORY OF OPERATION 1.0 Introduction ......................1-1 2.0 Transmitter ......................1-1 2.1 General......................1-1 3.0 Receiver.......................1-3 3.1 Receiver Front-End ..................1-3 3.2 Receiver Back-End..................1-4 3.3 Automatic Gain Control Circuit ...............1-5 4.0 Reciever (for models with PCB 8415533H02) .............1-6 4.1 Reciever Front-End ..................1-6 4.2 Receiver Back-End..................1-7 4.3 Automatic Gain Control Circuit ...............1-8 Frequency Generation Circuitry ................1-9...

  • Page 151: Chapter 1 Theory Of Operation

    Chapter 1 THEORY OF OPERATION Introduction This Chapter provides a detailed theory of operation for the VHF circuits in the radio. Schematic diagrams and board layout diagrams are included in Chapter 4 in this Section of the manual. Transmitter P C I C Antenna Vcontrol Vcontrol...
  • Page 152 THEORY OF OPERATION The 9Z67 LDMOS driver IC contains a 2 stage amplification with a supply voltage of 7.3V. This RF power amplifier is capable of supplying an output power of 0.3W (pin 6 and 7) with an input signal of 2mW (3dBm) (pin16). The current drain would typically be 130mA while operating in the frequency range of 136-174MHz.

  • Page 153: Receiver

    Receiver U3503 and its associated circuitry acts as a temperature cut back circuitry. This circuitry provides the necessary voltage to the PCIC to cut the transmitter power when the radio temperature gets too high. Receiver The VHF receiver consists of a front end, back end and automatic gain control circuits. A block diagram of the VHF receiver is shown in Figure 2-2 .

  • Page 154: Receiver Back-End

    THEORY OF OPERATION The output of the bandpass filter is coupled to the RF amplifier transistor Q3302 via C3306. After being amplified by the RF amplifier, the RF signal is further filtered by a second varactor tuned bandpass filter, consisting of L3305, L3306, C3311 to C3314 and D3302. Both the pre and post-RF amplifier varactor tuned filters have similar responses.

  • Page 155: Automatic Gain Control Circuit

    Receiver The demodulated signal on pin 27 of U3220 is also used for squelch control. The signal is routed to U404 (ASFIC) where squelch signal shaping and detection takes place. The demodulated audio signal is also routed to U404 for processing before going to the audio amplifier for amplification. Automatic Gain Control Circuit The front end automatic gain control circuit provides automatic reduction of gain, of the front end RF amplifier via feedback.

  • Page 156: Reciever (For Models With Pcb 8415533H02)

    THEORY OF OPERATION Receiver (for models with PCB 8415533H02) Antenna Pin Diode Varactor Varactor Antenna Crystal RF Amp Mixer IF Amp Tuned Filter Tuned Filter Switch RF Jack Filter First LO from VCO Control Voltage from ASFIC U3220 Demodulator Limiter Recovered Audio RSSI 455kHz...

  • Page 157: Receiver Back-End

    Receiver (for models with PCB 8415533H02) The output of the post-RF amplifier filter is connected to the passive double balanced mixer which consists of T3301, T3302 and CR3301. Matching of the filter to the mixer is provided by C3317, C3318 and L3308. After mixing with the first LO signal from the voltage controlled oscillator (VCO) using high side injection, the RF signal is down-converted to the 44.85 MHz IF signal.

  • Page 158: Automatic Gain Control Circuit

    THEORY OF OPERATION Automatic Gain Control Circuit The front end automatic gain control circuit provides automatic reduction of gain, of the front end RF amplifier via feedback. This action is necessary to prevent overloading of backend circuits. This is achieved by drawing some of the output power from the RF amplifier output. At high radio frequencies, capacitor C3327 provides the low impedance path to ground for this purpose.

  • Page 159: Frequency Generation Circuitry

    Frequency Generation Circuitry Frequency Generation Circuitry Voltage Multiplier Rx Out Mixer Aux3 VCOBIC Rx VCO Circuit Vmult1 U3801 Synthesizer Vmult2 U3701 Loop Filter Tx Out PA Driver 16.8 MHz Ref. Osc. Tx VCO Circuit MOD Out Modulating Signal Figure 5-1 Frequency Generation Unit Block Diagram The Frequency Generation Circuitry is composed of two main ICs, the Fractional-N synthesizer (U3701), and the VCO/Buffer IC (U3801).
  • Page 160 1-10 THEORY OF OPERATION Both the normal and adapt charge pumps get their supply from the capacitive voltage multiplier which is made up of C3701 to C3704 and triple diodes D3701, D3702. Two 3.3V square waves ( 180 deg out of phase) are first multiplied by four and then shifted, along with regulated 5V, to build up 13.5V at pin 47 of U3701.

  • Page 161: Voltage Controlled Oscillator (Vco)

    Frequency Generation Circuitry 1-11 Voltage Controlled Oscillator - (VCO) AUX3 (U3701 Pin2) U3701 Pin 32 Prescaler Out TRB_IN Pin 20 Pin 19 Pin 12 Pin7 Rx-SW TX/RX/BS Pin13 Tx-SW Switching Network LO RF INJECTION Presc Vcc-Superfilter (U3701 Pin28) Matching U3801 Low Pass Network VCOBIC...
  • Page 162 1-12 THEORY OF OPERATION The RF section of the VCOBIC(U3801) is operated at 4.54 V (VSF), while the control section of the VCOBIC and Fractional-N synthesizer (U3701) is operated at 3.3V. The operation logic is shown in Figure 5-6. Figure 5-4 VCO Control Logic Desired Mode AUX 4 AUX 3...

  • Page 163: Chapter 2 Troubleshooting Charts

    Chapter 2 TROUBLESHOOTING CHARTS Introduction This section contains detailed troubleshooting charts. These charts should be used as a guide in determining the problem areas. They are not a substitute for knowledge of circuit operation and astute troubleshooting techniques. It is advisable to refer to the related detailed circuit descriptions in the theory of operation sections prior to troubleshooting a radio.

  • Page 164: Troubleshooting Chart For Receiver (Sheet 1 Of 2)

    TROUBLESHOOTING CHARTS START Bad SINAD Bad 20dB Quieting No Recovered Audio Audio at Check Controller pin 27 of U3220? Spray of inject 1st IF into XTAL Filter IF Freq: 45.1MHz Check Q3270 bias circuitry for faults. Audio heard? Rotate Freq. Knob Check 2nd LO Control Voltage at C3279 Activity on...
  • Page 165 TROUBLESHOOTING CHARTS Inject RF into J3501 Trace IF signal Q3200 Signal at from C3200 to collector OK? C3200? Q3200. Check for IF signal bad XTAL filter. present? Before replacing U3220, check U3220 voltages; 1st LO O/P trace IF signal Signal at Check FGU path.
  • Page 166 TROUBLESHOOTING CHARTS START Bad SINAD Bad 20dB Quieting No Recovered Audio Check Controller Audio at (in the case of no audio) pin 8 of U3220? OR ELSE go to “B” Spray or inject 44.85MHz into XTAL Filter Y3200 Audio heard? Check Q3200 bias for faults.
  • Page 167 TROUBLESHOOTING CHARTS Inject RF into J3501 Trace IF signal Q3200 IF Signal from L3200 to collector OK? at L3200? Q3200. Check for IF signal bad XTAL filter. present? Before replacing U3220, check U3220 volt- 1st LO O/P ages; trace IF Signal at Check FGU signal path.

  • Page 168: Troubleshooting Chart For Transmitter

    TROUBLESHOOTING CHARTS START Change U3801 L3831, Change L3832, No LO? L3831, L3832 L3833 O/ Pin 10 TRB = 3.2V? Tx Carrier? >1V? VCO OK Check R3811, L3811 for dry joint or faulty AUX 3 Check High? R3829 Change Check U3701 L3821, Pin 2 for 3.2V L3822,...
  • Page 169 TROUBLESHOOTING CHARTS Check U3201, 3.3V at U3701 Start L3731 pins 5, 20, 34 & 36 Visual Check D3701, Correct check of the D3702, U3701, Problem Board OK? C3701 - C3707 16.8MHz Is 16.8MHz Is U3701 Pin 47 Replace at pin 6 of signal at Signal at AT = 13 VDC...
  • Page 170 TROUBLESHOOTING CHARTS START No Power Is There B+ Check Bias for Ant Q3561 switch Is Control Voltage Is Current Check PCIC High or Low High Check Drive to Module 1. Check Pin Diodes 2. Check Harmonic Filter Is Drive Troubleshoot Inspect/Repair Tx.

  • Page 171: Troubleshooting Chart For Controller

    TROUBLESHOOTING CHARTS MCU Check Press PTT. Red LED does not Before replacing light up Power Up Not able to pro- MCU, check SPI Audio at Alert Tone gram RF Board AUDIO clock, SPI data, AudioPA J403 Audio and RF IC select (U420) input at Pin 2 &...
  • Page 172 2-10 TROUBLESHOOTING CHARTS THIS PAGE INTENTIONALLY LEFT BLANK...

  • Page 173: Vhf Pcb/Schematics And Parts Lists

    = 1000), and capacitances are in picofarads (pF) or microfarads (µF). 2. DC voltages are measured from point indicated to chassis ground using a Motorola DC multimeter or equivalent. Transmitter measurements should be made with a 1.2 µH choke in series with the voltage probe to prevent circuit loading.
  • Page 174 VHF PCB/SCHEMATICS AND PARTS LIST Allocation of Schematics and Circuit Boards VHF (136-174MHz) The VHF schematics and the related PCB and parts list are shown in the table below. Table 3-1 VHF Diagrams and Parts Lists PCB : 8404055G05/G06/G07 Main Board Top Side Page 3-5 8404055G05/G06/G07 Main Board Bottom Side Page 3-6...
  • Page 175 Allocation of Schematics and Circuit Boards Table 3-3 VHF Diagrams and Parts Lists PCB : 8471021L01 Main Board Top Side Page 3-37 8471021L01 Main Board Bottom Side Page 3-38 SCHEMATICS VHF Controls and Switches (Sht 2 of 2) (8471021L01) Page 3-39 VHF Controls and Switches (Sht 2 of 2) (8471021L01) Page 3-40...
  • Page 176 THIS PAGE INTENTIONALLY LEFT BLANK...

  • Page 177: Vhf Pcb/Schematic Diagrams And Radio Parts List (Rf Board)

    VHF PCB & Schematic Diagrams VHF PCB/Schematic Diagrams and Radio Parts List (RF Board) VR444 C3205 PB502 PB501 PB504 C522 C3212 C3213 C502 U3201 R3209 Q3201 C3270 R3202 Y3761 B503 B504 Y3200 C3279 C3210 R3226 R3275 R3225 C3277 VR501 R3212 C3278 C3214 C3203...
  • Page 178 VHF PCB & Schematic Diagrams VR441 C525 C526 C3223 C3219 C527 C528 R3219 C3227 C529 C3240 C530 R3224 R3222 C531 S502 C3236 C532 C533 B501 C534 R3223 C3237 C3243 Y3762 C535 C536 C3244 C537 CR501 U3220 C538 C3235 C3751 C539 C3221 C540 C3230...
  • Page 179 VHF PCB & Schematic Diagrams C3205 PB501 PB502 PB504 VR444 C522 C3212 C3213 SH3201 R3209 R3202 Y3761 Y3200 C3270 C3279 C3210 R3226 R3275 C3277 R3225 R3212 R3203 C3278 C3203 C3214 TP3702 C3207 Q3270 R3274 R3201 J200 R506 L3200 R3213 TP3701 R3204 L3202 R3205...
  • Page 180 VHF PCB & Schematic Diagrams VR440 VR441 C525 C526 C3223 C3219 C527 C528 R3219 C3227 C529 C3240 C530 R3222 C531 R3224 VR506 S502 C532 C3236 C533 B501 C534 C3237 R3223 C3224 C3243 Y3762 C535 C536 C3244 U3220 C537 CR501 C538 C3235 C539 C3751...
  • Page 181 VHF PCB & Schematic Diagrams C525 C526 C527 C528 C529 C530 C531 C532 C533 C534 C535 C536 C537 C538 470pF 470pF 470pF 470pF 470pF 470pF 470pF 470pF 470pF 470pF 470pF 470pF 470pF 470pF 16_8MHz_1_SW 16_8MHz_2_SW 16.8MHz J200-1 5V_1_SW 5V_2_SW 5V_3_SW 5V_4_SW 5V_5_SW 5V_6_SW...
  • Page 182 VHF PCB & Schematic Diagrams 3-10 UNSWB+ F501 PB505 SWITCH mgc_comps T CH S502 MECH_SWB+ 1 A1 I T CH B501 3 A2 C502 TAB2 BATT_CODE DATA EMER C503 C523 L505 0.47uF 1000pF 390nH 390nH 0. 47uF 1000pF VR506 TAB1 100pF 100pF C520...
  • Page 183 VHF PCB & Schematic Diagrams 3-11 UNSWB+ F501 PB505 SWITCH mgc_comps S502 MECH_SWB+ B501 TAB2 BATT_CODE DATA EMER L505 C502 C503 C523 390nH 0.47uF 100pF 1000pF VR506 TAB1 6.8V VR439 C520 CR501 .01uF PB501 SWITCH Vdda LI_ION B503 VR440 C521 .01uF 6.8V C505...
  • Page 184 VHF PCB & Schematic Diagrams 3-12 R5_2_FE R5_3_FE C3320 82pF C3309 R3316 C3337 .022uF 0.1uF L3309 150nH R3321 R3322 UNSWB_PLUS_1_RX UNSWB_PLUS_2_RX R3323 IF_1_FE UNSWB+ C3308 L3304 330pF 470nH C3336 10uF C3307 R3315 100pF C3315 T3301 10pF R3310 C3317 39pF C3311 C3312 C3318 C3313...
  • Page 185 VHF PCB & Schematic Diagrams 3-13 Vdd_FILTERED Vdd_FILTERED C3208 R3209 R5_3_ZIF R3200 R3220 R3206 4.7K 100K RSSI C3205 Q3201 C3204 R3201 0.1uF .01uF 2.2K C3220 10pF R3212 R3207 R3208 4.7K L3221 C3239 R3221 C3228 C3210 .022uF .01uF C3229 1000pF C3225 100pF Y3200 0.1uF...
  • Page 186 VHF PCB & Schematic Diagrams 3-14 U3711 ADP3 mgc_comps SWB_PLUS_1_FN 5V_1_FN 5V_2_FN (SOURCE) SWB+ C3715 C3711 470pF L3701 C3712 C3713 10uF 390nH 0.1uF 2.2uF C3701 .01uF R3701 C3702 .01uF D3701 C3710 C3703 2.2uF .01uF C3704 .01uF BIAS_ADJ_1_FN R3702 R3705 D3702 C3708 R3726 C3725...
  • Page 187 VHF PCB & Schematic Diagrams 3-15 Vdda VSF_1_VCO Vdda_3_VCO R5_1_VCO L3813 R3817 R3802 R3811 C3822 C3813 1000pF D3821 C3810 .01uF L3811 C3811 L3824 L3812 C3812 R3818 VCTRL_1_VCO C3825 C3830 R3822 C3804 100nH 0.1uF 0.1uF 100nH 15pF 68pF VCTRL 0.1uF C3818 R3828 022uF R3821...
  • Page 188 VHF PCB & Schematic Diagrams 3-16 RESET_1_PA 5V_2_PA C3571 470pF BIAS_TUNING C3570 CLK_2_PA 330pF R3570 DATA_2_PA R3569 CSX_2_PA 5.6K Q3561 UNSWB_LPLUS_2_PA C3560 MMBT3906 UNSW_LPLUS_3_PA GND2 BPOS NC_U3502_13 DATA R3561 U3502 NC_U3502_12 NC_U3502_11 TEMP H99S-4 NC_U3502_10 RSET LM50C C3566 NC_U3502_9 5185963A15 F168 100pF R3571...

  • Page 189: 8404055G05/G06/G07/G09

    B503 3980502Z01 Contact, Backup B+ C3274 2113743N38 33.0 pF, 5% C3512 2113740F43 47 pF C3708 2113928N01 0.1 uF, 10% (not used in GP344/GP644) C3275 2113743N44 56.0 pF, 5% C3513 2113740F38 30 pF C3709 2113928N01 0.1 uF, 10% B504 3980501Z01 Contact, Backup B-...
  • Page 190 VHF Radio Parts List (RF Board) 8404055G05/G06/G07/G09 3-18 Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Part No. Part No. Part No. Part No. C3816 2113743N22 6.8 pF, 0.5 pF C547 2113743L09 470 pF, 10% L3519...
  • Page 191 270 k, 5% R3834 0662057M42 47, 5% 8404055G09 RF PCB R3564 0662057N35 330 k, 5% R3835 0662057N15 47 k, 5% * Motorola Depot Servicing only R3565 NOT PLACED R3836 0662057M98 10 k, 5% R3566 NOT PLACED R501 0662057M70 680, 5% R3569...
  • Page 192 VHF PCB & Schematic Diagrams 3-20 THIS PAGE INTENTIONALLY LEFT BLANK...
  • Page 193 VHF PCB and Schematic Diagrams (EPP) 3-21 VHF PCB/Schematic Diagrams and Radio Parts List (RF Radio) (EPP) VR444 PB502 PB501 PB504 C522 C3202 Y3205 C3206 C3278 C3225 TP3702 J200 R506 TP3701 L3200 C3201 U3221 R3741 Q505 C3741 SH3203 R3208 C3208 R3211 R3205 C3742...
  • Page 194 3-22 VHF PCB and Schematic Diagrams (EPP) VR441 R3280 R3282 R3283 R3277 C525 C526 R3281 L505 C527 C3236 C3285 R3209 C528 C529 C530 C531 S502 C532 R3271 R3222 R3224 C533 C3215 C534 C3279 C3275 C3200 C535 C536 CR3203 C3207 C537 C538 C539 C540...

  • Page 195: 8415533H02

    VHF PCB and Schematic Diagrams (EPP) 3-23 VHF (136-174MHz) Controls And Switches Schematic Diagram (sht 1 of 2) 8415533H02...
  • Page 196 3-24 VHF PCB and Schematic Diagrams (EPP) VHF (136-174MHz) Controls And Switches Schematic Diagram (sheet 2 of 2) 8415533H02...
  • Page 197 VHF PCB and Schematic Diagrams (EPP) 3-25 VHF (136-174MHz) Receiver Front End Schematic Diagram 8415533H02...
  • Page 198 3-26 VHF PCB and Schematic Diagrams (EPP) VHF (136-174MHz) Receiver Back End Schematic Diagram 8415533H02...
  • Page 199 VHF PCB and Schematic Diagrams (EPP) 3-27 VHF (136-174MHz) Synthesizer Schematic Diagram 8415533H02...
  • Page 200 3-28 VHF PCB and Schematic Diagrams (EPP) VHF (136-174MHz) Voltage Controlled Oscillator Schematic Diagram 8415533H02...
  • Page 201 VHF PCB and Schematic Diagrams (EPP) 3-29 VHF (136-174MHz) Transmitter Schematic Diagram 8415533H02...
  • Page 202 VHF PCB/Schematic Diagrams and Radio Parts List (RF Radio) (EPP) THIS PAGE INTENTIONALLY LEFT BLANK...
  • Page 203 C3517 2113944C41 CAP CER CHP 68.0PF 50V B503 3980502Z01 CONTACT, BACKUP B+ (not C3281 2113946D02 CAP CER CHP 1.0UF 6.3V used in GP344) C3325 2113945A09 CAP CER CHP 1000PF 50V C3518 NOTPLACED - B504 3980501Z01 CONTACT, BACKUP B'- (not C3282 2113944A21 CAP CER CHP 6.8PF 50V +/-...
  • Page 204 3-32 VHF Radio Parts List (RF Board) (EPP) Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Part No. Part No. Part No. Part No. C3551 2113944A36 CAP CER CHP 68.0PF 50V C3713 2313960C78 CAP TANT 2.2 UF 10% 20V...
  • Page 205 VHF Radio Parts List (RF Board) (EPP) 3-33 Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Part No. Part No. Part No. Part No. C535 2113945A05 CAP CER CHP 470PF 50V D3302 4815276H01 VARACTOR DIODE FROM...
  • Page 206 3-34 VHF Radio Parts List (RF Board) (EPP) Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Part No. Part No. Part No. Part No. R3209 0613952R15 CER CHIP RES 39K OHM 5% R3304 0613952R25 CER CHIP RES 100K OHM...
  • Page 207 CER CHIP RES 47K OHM 5% VR442 NOTPLACED - 0402 VR444 NOTPLACED - R509 0613952R66 CER CHIP RES 0.0 +/-0.050 VR501 4815038H01 Diode Array,ZEN,SM,SOD- OHM (not used in GP344) 323,6.93V, RT3301 NOTPLACED - VR506 4815038H01 Diode Array,ZEN,SM,SOD- S501 4080710Z19 SWITCH, FREQUENCY 323,6.93V, 4080710Z21 SWITCH, FREQUENCY...
  • Page 208 VHF PCB/Schematic Diagrams and Radio Parts List (RF Radio) (EPP) THIS PAGE INTENTIONALLY LEFT BLANK...
  • Page 209 VHF PCB and Schematics Diagram 3-37 VHF PCB/Schematic Diagrams and Radio Parts List (RF Board) IP67 VR444 PB502 PB501 PB504 C522 C3202 Y3205 C3206 C3278 C3225 J200 R506 TP3702 C3201 TP3701 L3200 U3221 R3741 Q505 C3741 C3208 R3211 R3205 R3208 SH3203 C3742 R505...
  • Page 210 3-38 VHF PCB and Schematics Diagram VR441 R3280 R3282 R3277 R3283 C525 R3281 C526 L505 C527 C3285 C3236 R3209 C528 C529 C530 R3271 R3222 R3224 C531 S502 C532 C3279 C3275 C533 C3215 C534 C3200 C535 C536 CR3203 C3207 C537 C538 C539 C540 U3220...

  • Page 211: 8471021L01

    VHF PCB and Schematics Diagram 3-39 C525 C526 C527 C528 C529 C530 C531 C532 C533 C534 C535 C536 C537 C538 470pF 470pF 470pF 470pF 470pF 470pF 470pF 470pF 470pF 470pF 470pF 470pF 470pF 470pF J200-1 J200-2 J200-3 J200-4 J200-5 J200-6 EMER J200-7 J200-8...
  • Page 212 3-40 VHF PCB and Schematics Diagram UNSWB+ F501 PB505 SWITCH mgc_comps SWITCH S502 MECH_SWB+ 1 A1 B501 3 A2 BATT_CODE EMER C502 TAB2 DATA C503 C523 L505 0.47uF 1000pF 390nH 390nH 0.47uF 1000pF VR506 100pF TAB1 100pF C520 VR439 6.8V 6.8V CR501 .01uF...
  • Page 213 VHF PCB and Schematics Diagram 3-41 R5_3_FE C3320 82pF C3337 C3309 R3316 .022uF 0.1uF 82pF .022uF 0.1uF L3309 150nH 150nH R3321 R3322 UNSWB+ IF_1_FE L3304 C3308 470nH 330pF 470nH 330pF R3323 C3336 10uF 10uF R3315 C3307 100pF 100pF T3301 C3315 10pF R3310 10pF...
  • Page 214 3-42 VHF PCB and Schematics Diagram U302-1 TC7W04F C352 R345 R360 0.1uF FL303 U302-4 CFWC455E PWR_GND U302-3 1 IN TC7W04F R355 100K U302-2 TC7W04F BW_SEL R321 CR312 R324 C362 CR313 0.1uF FL304 CFWC455G 1 IN R361 R350 R358 3.3K 2.4K C329 C357 0.1uF...
  • Page 215 VHF PCB and Schematics Diagram 3-43 U3711 mgc_comps ADP3300 SWB_PLUS_1_FN SWB+ (SOURCE) C3715 C3711 470pF 10.0uF 470pF 10uF L3701 C3712 C3713 0.1uF 2.2uF 390nH 390nH .01uF 0.1uF 2.2uF C3701 .01uF .01uF R3701 C3702 D3701 C3710 .01uF 2.2uF .01uF 2.2uF C3703 .01uF BIAS_ADJ .01uF...
  • Page 216 3-44 VHF PCB and Schematics Diagram Vdda R5_1_VCO L3813 R3817 R3802 R3811 C3822 C3813 1000pF 1000pF D3821 C3810 L3811 L3812 C3811 C3812 .01uF .01uF C3830 R3818 C3825 C3804 10pF 100nH 100nH 0.1uF 0.1uF 15pF 100nH 100nH 0.1uF 0.1uF 10pF 68pF 15pF 0.1uF 0.1uF...
  • Page 217 VHF PCB and Schematics Diagram 3-45 UNSWB+ DATA RESET UNSWB+ UNSWB+ UNSWB+ C3571 470pF 470pF BIAS_TUNING C3570 330pF 330pF R3570 Q3561 C3560 R3569 5.6K GND2 BPOS R3561 DATA NC_U3502_13 U3502 NC_U3502_12 TEMP NC_U3502_11 H99S-4 RSET LM50C NC_U3502_10 C3566 100pF F168 5185963A15 NC_U3502_9 100pF...
  • Page 218 3-46 VHF PCB/Schematic Diagrams and Radio Parts List (RF Board) IP67 THIS PAGE INTENTIONALLY LEFT BLANK...
  • Page 219 VHF Radio Parts List (RF Board) VHF Radio Parts List (RF Board) Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description 8471021L01 Part No. Part No. Part No. C3278 2113945D04 CAP CER CHP 100,000PF C3319 NOTPLACED GCAM DUMMY PART C3509...
  • Page 220 VHF Radio Parts List (RF Board) Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Part No. Part No. Part No. Part No. C3544 2113945A03 CAP CER CHP 330PF 50V C3708 2113946B04 CAP CER CHP 0.10UF 10V...
  • Page 221 VHF Radio Parts List (RF Board) Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Part No. Part No. Part No. Part No. C529 2113945A05 CAP CER CHP 470PF 50V C555 2113945A05 CAP CER CHP 470PF 50V...
  • Page 222 VHF Radio Parts List (RF Board) Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Part No. Part No. Part No. Part No. Q505 4813973M07 XSTR,BIP GP SS,NPN,TO- R3274 0613952Q79 CER CHIP RES 1800 OHM 5 R3315...
  • Page 223 CRYSTAL 16.8 MHZ 0402 PLACEMENT R3822 0613952Q41 CER CHIP RES 47.0 OHM 5 SH3501 2615144H03 SHIELD FOR GSM * Motorola Depot Servicing only 0402 PLACEMENT ** Not Servicable R3823 0613952R13 CER CHIP RES 33K OHM 5% SH3502 2615144H04 SHIELD FOR GSM...
  • Page 224 3-52 VHF PCB/Schematic Diagrams and Radio Parts List (RF Board) IP67 THIS PAGE INTENTIONALLY LEFT BLANK...
  • Page 225 VHF PCB and Schematic Diagrams 3-53 VHF Circuit Board/Schematic Diagrams and Parts List VR444 C3205 PB502 PB501 PB504 C522 C3212 C3213 C502 U3201 R3209 Q3201 C3270 R3202 Y3761 B503 B504 Y3200 C3279 C3210 R3226 R3275 R3225 C3277 VR501 R3212 C3278 C3214 C3203 Q3270...
  • Page 226 3-54 VHF Radio Parts List (RF Board) VR441 C525 C526 C3223 C3219 C527 C528 R3219 C3227 C529 C3240 C530 R3224 R3222 C531 S502 C3236 C532 C533 B501 C534 C3237 R3223 C3243 Y3762 C535 C536 C3244 C537 CR501 U3220 C538 C3235 C3751 C539 C3221...

  • Page 227: 8486062B12

    VHF PCB and Schematic Diagrams 3-55 C525 C526 C527 C528 C529 C530 C531 C532 C533 C534 C535 C536 C537 C538 470pF 470pF 470pF 470pF 470pF 470pF 470pF 470pF 470pF 470pF 470pF 470pF 470pF 470pF 16_8MHz_1_SW 16_8MHz_2_SW 16.8MHz J200-1 J200-2 5V_1_SW 5V_2_SW 5V_3_SW 5V_4_SW...
  • Page 228 3-56 VHF Radio Parts List (RF Board) R5_2_FE R5_3_FE C3320 82pF C3337 C3309 R3316 0.1uF .022uF L3309 150nH R3321 R3322 UNSWB_PLUS_1_RX UNSWB_PLUS_2_RX R3323 IF_1_FE UNSWB+ L3304 C3308 470nH 330pF C3336 10uF C3307 R3315 100pF C3315 T3301 10pF R3310 C3317 39pF C3311 C3312 C3313...
  • Page 229 VHF PCB and Schematic Diagrams 3-57 Vdd_FILTERED Vdd_FILTERED C3208 R5_3_ZIF R3209 R3200 R3220 R3206 4.7K 100K RSSI Q3201 C3204 R3201 C3205 0.1uF .01uF 2.2K C3220 10pF R3212 R3207 R3208 4.7K L3221 C3239 R3221 C3228 C3210 .01uF .022uF C3229 1000pF C3225 100pF Y3200 0.1uF...
  • Page 230 3-58 VHF Radio Parts List (RF Board) U3711 ADP3 mgc_comps SWB_PLUS_1_FN 5V_1_FN 5V_2_FN (SOURCE) SWB+ C3715 C3711 L3701 470pF 10uF C3712 C3713 390nH 0.1uF 2.2uF C3701 .01uF R3701 C3702 .01uF D3701 C3710 C3703 2.2uF .01uF C3704 .01uF BIAS_ADJ_1_FN R3702 R3705 D3702 C3708 R3726...
  • Page 231 VHF PCB and Schematic Diagrams 3-59 Vdda VSF_1_VCO Vdda_3_VCO R5_1_VCO L3813 R3817 R3802 R3811 C3822 C3813 1000pF D3821 .01uF C3810 L3811 L3824 L3812 C3811 C3812 R3818 VCTRL_1_VCO C3825 R3822 C3830 C3804 100nH 0.1uF 0.1uF 100nH 15pF 68pF VCTRL 0.1uF C3818 R3828 022uF R3821...
  • Page 232 3-60 VHF Radio Parts List (RF Board) RESET_1_PA 5V_2_PA C3571 470pF BIAS_TUNING C3570 CLK_2_PA 330pF R3570 DATA_2_PA R3569 CSX_2_PA 5.6K Q3561 UNSWB_LPLUS_2_PA C3560 MMBT3906 UNSW_LPLUS_3_PA GND2 BPOS NC_U3502_13 DATA R3561 U3502 NC_U3502_12 NC_U3502_11 TEMP H99S-4 NC_U3502_10 RSET LM50C C3566 NC_U3502_9 5185963A15 F168 100pF...
  • Page 233 VHF Radio Parts List (RF Board) 3-61 VHF Radio Parts List (RF Board) Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description 8486062B12 Part No. Part No. Part No. C3278 2113743E07 0.022uF C3523 2111078B44 120pF C3724 2311049A08 C3279 2311049A40 2.2uF...
  • Page 234 3-62 VHF Radio Parts List (RF Board) Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Part No. Part No. Part No. Part No. C403 2113928D08 10uF C502 2311049A05 0.47uF,10% C717 2113743L09 470 pF 10% L3309 2462587N55...
  • Page 235 VHF Radio Parts List (RF Board) 3-63 Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Part No. Part No. Part No. Part No. Q3302 4813827A07 MMBR942 R3314 0662057M26 R3811 0662057M50 R473 0662057M26 Q3501 4813828A09 RF Power FET...
  • Page 236 10V ZENER VR448 4880140L15 10V ZENER VR449 4880140L15 10V ZENER VR450 4880140L15 10V ZENER VR501 4813830A18 6.8V Zener VR506 4802245J73 6.8 Zener Y3200 9186153B01 XTAL Y3761 4805875Z04 XTAL 16.8MHz * Motorola Depot Servicing only ** For EX600 XLS models only...
  • Page 237 Compact Professional Portable Radios UHF1 (403-470MHz) & Narrow Band (450-470MHz) Service Information Issue: July 2007...
  • Page 238 Accordingly, any copyrighted Motorola computer programs contained in the Motorola products described in this manual may not be copied or reproduced in any manner without the express written permission of Motorola. Furthermore, the purchase of Motorola...
  • Page 239 Table of Contents Chapter 1 THEORY OF OPERATION 1.0 Introduction ......................1-1 2.0 Transmitter ......................1-1 2.1 General......................1-1 3.0 Receiver.......................1-3 3.1 Receiver Front-End ..................1-4 3.2 Receiver Back-End..................1-5 3.3 Automatic Gain Control Circuit ...............1-6 4.0 Frequency Generation Circuitry ................1-7 4.1 Synthesizer.....................1-7 4.2 Voltage Controlled Oscillator (VCO) ...............1-9 Chapter 2 TROUBLESHOOTING CHARTS 1.0 Introduction ......................2-1...
  • Page 240 THIS PAGE INTENTIONALLY LEFT BLANK...

  • Page 241: Chapter 1 Theory Of Operation

    Chapter 1 THEORY OF OPERATION Introduction This Chapter provides a detailed theory of operation for the UHF circuits in the radio. Schematic diagrams and board layout diagrams are included in Chapter 4 in this Section of the manual. Transmitter P C I C Antenna Vcontrol Vcontrol...
  • Page 242 THEORY OF OPERATION The 9Z67 LDMOS driver IC contains a 2 stage amplification with a supply voltage of 7.3V. This RF power amplifier is capable of supplying an output power of 0.3W (pin 6 and 7) with an input signal of 2mW (3dBm) (pin16). The current drain would typically be 160mA while operating in the frequency range of 403-470MHz.

  • Page 243: Receiver

    Receiver The UHF receiver consists of a front end, back end and automatic gain control circuits. A block diagram of the UHF and UHF Narrow Band receiver is shown in Figure 2-2 and 2-3. Antenna Pin Diode Varactor Varactor Antenna Crystal RF Amp Mixer...

  • Page 244: Receiver Front-End

    THEORY OF OPERATION Antenna Pin Diode Varactor Varactor Antenna Crystal RF Amp Mixer IF Amp Tuned Filter Tuned Filter Switch RF Jack Filter First LO from VCO Control Voltage from ASFIC U3220 Demodulator Limiter Recovered Audio RSSI 455kHz 455kHz Filter Filter 455kHz Filter...

  • Page 245: Receiver Back-End

    mixing with the first LO signal from the voltage controlled oscillator (VCO) using low side injection, the RF signal is down-converted to the 45.1 MHz IF signal. The IF signal coming out of the mixer is transfered to the crystal filter (FL301) through a resistor pad and a diplexer (C322 and L310).

  • Page 246: Automatic Gain Control Circuit

    THEORY OF OPERATION Automatic Gain Control Circuit The front end automatic gain control circuit is to provide automatic gain reduction of the front end RF amplifier via feedback. This action is necessary to prevent overloading of back end circuits. This is achieved by drawing some of the output power from the RF amplifier’s output.

  • Page 247: Frequency Generation Circuitry

    Frequency Generation Circuitry Dual Tran- sistor Voltage Multiplier Rx Out Matching Pass Mixer Network Filter Aux3 VCOBIC Rx VCO Circuit Vmult1 U241 Aux4 Synthesizer Vmult2 U201 Loop Filter Tx Out Attenuator PA Driver 16.8 MHz Ref. Osc. MOD Out Tx VCO Circuit Modulating Signal Figure 1-4 Frequency Generation Unit Block Diagram...
  • Page 248 THEORY OF OPERATION Both the normal and adapt charge pumps get their supply from the capacitive voltage multiplier which is made up of C258, C259, C228, triple diode CR201 and level shifters U210 and U211. Two 3.3V square waves ( 180 deg out of phase) are first shifted to 5V, then along with regulated 5V , put through arrays of diodes and capacitors to build up 13.3V at pin 47 of U201.

  • Page 249: Voltage Controlled Oscillator (Vco)

    Voltage Controlled Oscillator - (VCO) AUX3 (U201 Pin2) Level Shifter AUX4 (U201 Pin3) Network U201 Pin 32 Prescaler Out TRB_IN Pin 20 Pin 19 Pin 12 Pin7 Rx-SW TX/RX/BS Pin13 Tx-SW Switching Network LO RF INJECTION Presc Vcc-Superfilter (U201 Pin28) Matching U241 Low Pass...
  • Page 250 1-10 THEORY OF OPERATION The VCOBIC(U241) is operated at 4.54 V (VSF) and Fractional-N synthesizer (U201) at 3.3V. This difference in operating voltage requires a level shifter consisting of Q260 and Q261 on the TRB line. The operation logic is shown in Table Table 1-1. Table 1-1 Level Shifter Logic Desired Mode AUX 4...

  • Page 251: Chapter 2 Troubleshooting Charts

    Chapter 2 TROUBLESHOOTING CHARTS Introduction This section contains detailed troubleshooting charts. These charts should be used as a guide in determining the problem areas. They are not a substitute for knowledge of circuit operation and astute troubleshooting techniques. It is advisable to refer to the related detailed circuit descriptions in the theory of operation sections prior to troubleshooting a radio.

  • Page 252: Troubleshooting Chart For Receiver (Sheet 1 Of 2)

    TROUBLESHOOTING CHARTS START Bad SINAD Bad 20dB Quieting No Recovered Audio Audio at Check Controller pin 27 of U301? Spray of inject 1st IF into XTAL Filter IF Freq: 45.1MHz Check Q320 bias circuitry for faults. Audio heard? Rotate Freq. Knob Check 2nd LO Control Voltage at C363 Activity on...
  • Page 253 Inject RF into J101 Trace IF signal Q302 collec- Signal from L311 to tor OK? at L311? Q302. Check for IF signal bad XTAL filter. present? Before replacing U301, check U301 voltages; 1st LO O/P trace IF signal Signal at Check FGU path.

  • Page 254: Troubleshooting Chart For Transmitter

    TROUBLESHOOTING CHARTS START No Power Is There B+ Check Q111 Bias for Ant switch Is Control Voltage Is Current Check PCIC High or Low High Check Drive to Module 1. Check Pin Diodes 2. Check Harmonic Filter Is Drive Troubleshoot Inspect/Repair Tx.

  • Page 255: Troubleshooting Chart For Synthesizer

    Check U248, 3.3V at U201 Start L201 & L202 pins 5, 20, 34 & 36 Visual Check CR201, Correct check of the U210, U211, C258, Problem Board OK? C259 & C228 Is U201 Pin 47 Is 16.8MHz 16.8MHz at pin 6 of Replace Signal at signal at...
  • Page 256 TROUBLESHOOTING CHARTS START Change U241 No LO? Change L253 O/C? L253 Pin 10 TRB = 5V? Tx Carrier? >1V? VCO OK Check R245 for dry joint or faulty AUX 3 Check High? R260 Check U201 Pin 2 for 3.2V Change L243 V ctrl 0V or 13V?

  • Page 257: Troubleshooting Chart For Controller

    MCU Check Press PTT. Red LED does not Before replacing light up Not able to pro- Audio at Power Up MCU, check SPI gram RF Board AudioPA Alert Tone AUDIO clock, SPI data, (U420) J403 Audio and RF IC select input at Pin 2 &...
  • Page 258 TROUBLESHOOTING CHARTS THIS PAGE INTENTIONALLY LEFT BLANK...

  • Page 259: Notes For All Schematics And Circuit Boards

    = 1000), and capacitances are in picofarads (pF) or microfarads (µF). 2. DC voltages are measured from point indicated to chassis ground using a Motorola DC multimeter or equivalent. Transmitter measurements should be made with a 1.2 µH choke in series with the voltage probe to prevent circuit loading.

  • Page 260: Allocation Of Schematics And Circuit Boards

    UHF1 PCB/SCHEMATIC AND PARTS LIST UHF1 PCB/SCHEMATICS AND PARTS LISTS Allocation of Schematics and Circuit Boards UHF1 (403-470MHz) The UHF1 schematics and the related PCB and parts list are shown in the table below. Table 1-1 UHF1 Diagrams and Parts Lists PCB : 8404077G01 Main Board Top Side Page 3-5...
  • Page 261 Table 1-3 UHF1 Diagrams and Parts Lists PCB : 8415563H06 Main Board Top Side Page 3-31 8415563H06 Main Board Bottom Side Page 3-32 SCHEMATICS UHF1 Controls and Switches Page 3-33 UHF1 Receiver Front End Page 3-34 UHF1 Receiver Back End Page 3-35 UHF1 Synthesiser Page 3-36...

  • Page 262: Uhf Narrow Band (450-470Mhz)

    UHF1 PCB/SCHEMATIC AND PARTS LIST UHF Narrow Band (450-470MHz) The UHF Narrow Band schematics and the related PCB and parts list are shown in the table below. Table 1-5 UHF Narrow Band Diagrams and Parts Lists PCB : 8415563H06 Main Board Top Side Page 3-61 8415563H06 Main Board Bottom Side Page 3-62...
  • Page 263 UHF1 Circuit Board and Schematic Diagram UHF1 Circuit Board/Schematic Diagrams and Parts List C522 VR441 PB502 PB501 PB504 VR440 C521 R300 R352 C397 FL201 RT301 R314 R321 C362 C363 C328 R335 VR501 C325 R338 J200 R506 R325 L325 TP201 C385 C351 C353 C384...
  • Page 264 UHF1 Circuit Board and Schematic Diagram C523 VR442 C525 L505 C526 C527 C528 L330 C359 C529 C530 C531 S502 C338 C532 C533 C358 C534 C357 C535 R350 C536 C390 C344 C537 R344 C383 C538 C539 C360 R311 C540 C346 C541 C542 C361 R312...

  • Page 265: 8404077G01

    UHF1 Circuit Board and Schematic Diagram B501 L505 BATTERY_CONTACT 390nH RADIO_CODE 2 DATA UNSWB+ BATT_CODE 1 NEG BATT + F501 3 POS S502 CONN_J SWITCH BATT — MECH_SWB+ LI_ION B503 B504 C502 VR506 CR501 VR439 C503 0.47uF 6.8V 100pF Vdda R507 Vdda C505...
  • Page 266 UHF1 Circuit Board and Schematic Diagram DACRx C322 82pF R342 100K L310 150nH C315 R308 R305 C314 R310 0.1uF 100pF R304 C380 R309 .01uF L304 CR306 C321 180nH C306 100pF T301 XFMR C309 C308 100pF R306 R307 100pF 100K 100K C312 C310 C316...
  • Page 267 UHF1 Circuit Board and Schematic Diagram L331 R343 2.2uH Vdd_FILTERED Vdda C382 (SOURCE) 10uF DEMOD R350 C348 C347 C344 C346 C345 100K 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF C390 C329 100pF 0.1uF C343 0.22uF R344 R355 SH323 SH321 SH322 SHIELD SHIELD SHIELD Q320 C383...
  • Page 268 3-10 UHF1 Circuit Board and Schematic Diagram U210 U211 TC7SET04FU TC7SET04FU C265 C257 C296 100pF 0.1uF C258 .01uF U247 ADP3300 C259 SWB+ .01uF CR201 (SOURCE) C291 C294 C293 0.47uF L202 4V_3.3V 100pF 0.47uF U248 2.2uH L203 LP2980 C277 C278 2.2uH C230 C229 C228...
  • Page 269 UHF1 Circuit Board and Schematic Diagram 3-11 C281 R245 100pF R242 L243 C250 RESONATOR 7.5pF C276 C285 C286 2.2uF 100pF 0.1uF C246 L281 L273 100pF R241 390nH 33nH C242 7.5pF C272 C273 0.1uF C243 L271 L242 R244 7.5pF 68nH 220nH C245 RX_INJ 2.4pF...
  • Page 270 3-12 UHF1 Circuit Board and Schematic Diagram E101 BEAD R102 UNSWB+ L107 C114 C123 33.47nH 100pF 10uF C172 UNSWB+ C108 0.1uF L105 100pF 390nH R106 C109 L106 100pF 7.66nH Microstrip Microstrip R172 L108 L109 C121 C160 L112 11.03nH 100pF 100pF 390nH 4.22nH Q110...
  • Page 271 2180478Z20 1.0UF B503 3980502Z01 Backup Battery Contact, B+ C174 2113743N50 100pF C277 2113743N50 100pF C342 2180478Z20 1.0UF (not used in GP344) C175 2113740F51 100pF C278 2311049A09 2.2UF C343 2113743A23 0 .220UF ,10% B504 3980501Z01 Backup Battery Contact, B- C201 2113743N50...
  • Page 272 R112 0662057M61 R320 0662057M74 U301 5109632D83 LVZIF L273 2462587V28 33NH,5% R120 0662057N14 R321 0662057M83 2.4K * Motorola Depot Servicing only L281 2462587V41 390NH,10% R130 0662057M98 R322 0662057N30 200K ** For EX600 XLS models only L282 2462587V41 390NH,10% R131 0662057N05 R324...
  • Page 273 UHF1 PCB and Scematic Diagrams 3-15 UHF1 Circuit Board/Schematic Diagrams and Parts List C522 VR441 PB502 PB501 PB504 C521 VR440 R300 R352 C397 FL201 RT301 R314 R321 C362 C363 C328 R335 VR501 C325 R338 J200 R506 R325 L325 TP201 C385 C351 C353 C384...
  • Page 274 UHF1 PCB and Scematics Diagrams 3-16 C523 VR442 C525 L505 C526 C527 C528 L330 C359 C529 C530 C531 S502 C338 C532 C533 C358 C534 C357 C535 R350 C390 C344 C536 C537 R344 C383 C538 C539 C360 R311 C540 C346 C541 C542 C361 R312...
  • Page 275 UHF1 PCB and Scematic Diagrams 3-17 C522 C521 VR441 PB501 PB504 VR440 PB502 C505 C554 VR444 R300 R352 C397 FL201 R334 R507 RT301 R314 R321 FL301 CR310 C363 C328 C325 C362 VR501 R335 L332 R338 R326 C391 TP201 J200 R506 L325 R325 C385...
  • Page 276 UHF1 PCB and Scematics Diagrams 3-18 VR506 C523 C525 L505 C526 C527 C528 L330 C529 C359 C530 C531 S502 C338 C532 C358 C533 C534 C357 C279 C535 B501 C536 R350 C390 C278 C344 U248 C537 C538 R344 C383 C539 C360 C540 C346 R311...
  • Page 277 UHF1 PCB and Scematic Diagrams 3-19 BATTERY_CONTACT L505 B501 LI_ION B503 390nH RADIO_CODE UNSWB+ BATT_CODE DATA B504 F501 BATT+ S502 Vdda SWITCH BATT- CONN_J MECH_SWB+ VR439 CR501 TAB2 C525 C529 C536 C537 C538 C526 C527 C528 C530 C531 C532 C533 C534 C535 VR506...
  • Page 278 UHF1 PCB and Scematics Diagrams 3-20 BATTERY_CONTACT L505 B501 LI_ION B503 390nH RADIO_CODE 2 DATA UNSWB+ BATT_CODE 1 NEG B504 BATT+ 3 POS F501 CONN_J Vdda S502 BATT- SWITCH MECH_SWB+ VR439 CR501 TAB2 7 C525 C526 C527 C528 C529 C530 C531 C532 C533...

  • Page 279: 8404077G05/G06/G07/G09

    UHF1 PCB and Scematic Diagrams 3-21 DACRx C322 82pF R342 100K L310 150nH R308 R305 C314 C315 R310 0.1uF 100pF R304 C380 R309 .01uF L304 CR306 C321 180nH C306 100pF T301 XFMR C309 C308 100pF R306 R307 100pF 100K 100K C312 C310 C316...
  • Page 280 UHF1 PCB and Scematics Diagrams 3-22 L331 R343 2.2uH Vdd_FILTERED Vdda C382 (SOURCE) 10uF DEMOD R350 C348 C347 C344 C346 C345 100K 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF C390 C329 100pF 0.1uF C343 0.22uF R344 R355 SH323 SH321 SH322 SHIELD SHIELD SHIELD Q320 C383...
  • Page 281 UHF1 PCB and Scematic Diagrams 3-23 U210 U211 TC7SET04FU TC7SET04FU C265 C257 C296 100pF 0.1uF C258 .01uF U247 ADP3300 C259 SWB+ .01uF (SOURCE) CR201 C291 C294 C293 0.47uF 4V_3.3V L202 100pF 0.47uF U248 2.2uH LP2980 L203 C277 C278 2.2uH C230 C229 C228 100pF...
  • Page 282 UHF1 PCB and Scematics Diagrams 3-24 C281 R245 100pF R242 L243 C250 C276 C285 RESONATOR 7.5pF C286 2.2uF 100pF 0.1uF C246 L281 L273 100pF R241 390nH 33nH C242 7.5pF C272 C273 0.1uF C243 L271 L242 R244 7.5pF 68nH 220nH C245 RX_INJ 2.4pF TX_INJ...
  • Page 283 UHF1 PCB and Scematic Diagrams 3-25 E101 BEAD R102 UNSWB+ L107 C114 C123 33.47nH 100pF 10uF C172 UNSWB+ C108 0.1uF L105 100pF 390nH R106 C109 L106 100pF 7.66nH Microstrip Microstrip R172 L108 L109 C121 C160 L112 11.03nH 100pF 100pF 390nH Q110 4.22nH Microstrip...
  • Page 284 UHF1 PCB and Scematics Diagrams 3-26 THIS PAGE INTENTIONALLY LEFT BLANK...
  • Page 285 100.0 pF, 5% B503 3980502Z01 Contact, Backup B+ C172 2113740F51 C265 NOT PLACED C333 NOT PLACED (not used in GP344/GP644 ) C173 2113743M08 22000 pF, +80% / -20% C271 NOT PLACED C334 2113743M08 22000 pF, +80% / -20% B504 3980501Z01...
  • Page 286 UHF1 Radio Parts List (RF Board) 3-28 Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Part No. Part No. Part No. Part No. C395 2113743N50 100.0 pF, 5% CR203 4862824C03 Varactor Diode L301 2479990C01 13.9 nH...
  • Page 287 R510 0662057M01 0, 5% R511 NOT PLACED RT300 0680590Z01 Thermistor 33k RT301 NOT PLACED S501 4080710Z01 Freq Switch (used in GP344/ GP644) 4080710Z02 Freq Switch (used in GP344/ GP644) S502 1880619Z02 Potentiometer (Volume) SH100 2680507Z01 Shield, Harmonic Filter SH101 2680510Z01...
  • Page 288 UHF1 PCB and Scematics Diagrams 3-30 THIS PAGE INTENTIONALLY LEFT BLANK...
  • Page 289 UHF1 PCB and Schematic Diagrams 3-31 UHF1 PCB/Schematic Diagrams and Radio Parts List (RF Board) (EPP) VR444 PB502 PB501 C597 PB504 C338 FL302 C325 VR501 C349 C598 C599 J200 TP201 R506 SH201 C324 Q505 C220 L311 R355 L203 SH323 R505 U247 R324 C352...
  • Page 290 UHF1 PCB and Schematic Diagrams C522 C525 SH322 R376 C523 L505 C526 C527 C334 C528 R373 C529 C350 C530 C531 R372 R374 S502 R366 C532 L331 C383 C533 R371 R359 C534 R368 C535 C359 R378 C536 C327 C537 C348 R370 R375 C538 C390...

  • Page 291: 8415563H06

    UHF1 PCB and Schematic Diagrams 3-33 RADIO_CODE BATTERY_CONTACT B501 C597 C598 C599 L505 43pF 4.7pF 3.9pF 390nH BATT_CODE DATA BATT+ F501 CONN_J S502 BATT- MECH_SWB+ SWITCH LI_ION B503 VR439 TAB2 C601 E102 C602 BLM21PG221SN1 VR506 B504 C502 CR501 24pF 100pF 0.47uF TAB1 6.8V...
  • Page 292 UHF1 PCB and Schematic Diagrams DACRx C322 82pF R342 100K L310 150nH C315 R308 R310 R305 C314 100pF 0.1uF R304 R309 C380 .01uF L304 C321 CR306 180nH 100pF C306 T301 XFMR C309 C308 100pF R306 R307 100pF C312 100K 100K C310 C316 C318...
  • Page 293 UHF1 PCB and Schematic Diagrams 3-35 U302-1 R345 R360 TC7W04F FL303 C352 CFWC455E 0.1uF OUT 2 U302-3 TC7W04F U302-4 PWR_GND R355 100K BW_SEL U302-2 CR312 R324 R321 TC7W04F FL304 C362 CFWC455G 0.1uF 1 IN R361 CR313 R350 3.3K R358 2.4K C329 0.1uF C357...
  • Page 294 UHF1 PCB and Schematic Diagrams U210 U211 C257 TC7ST04FU C296 TC7ST04FU C265 0.1uF 100pF C258 .01uF U247 ADP3300 C259 SWB+ .01uF (SOURCE) CR201 C291 10uF C294 C293 SWB+ L202 100pF 0.47uF U248 2.2uH L203 LP2980 C277 C278 C228 2.2uH C230 C229 100pF 2.2uF...
  • Page 295 UHF1 PCB and Schematic Diagrams 3-37 UNSWB+ E101 BEAD R102 0.075 L107 C114 C123 33.47nH 100pF 10uF C172 0.1uF C109 L106 100pF 7.66nH Microstrip Microstrip TX_OUT R106 R172 Q110 L108 L109 C121 C160 L112 R175 100pF 4.22nH 100pF 22nH Microstrip C111 C112 C113...
  • Page 296 UHF1 PCB and Schematic Diagrams ANT_BIAS SH100 C108 L105 SHIELD 100pF 390nH TX_OUT HF SHIELD CR101 L101 L102 L104 17.02nH 17.02nH 19.61nH RX_IN CR102 C101 C102 C103 C104 C106 C107 100pF 8.2pF 13pF 7.5pF 4.7pF 3.3pF R170 C175 20pF RF_JACK R101 UHF1 (403-470MHz) Harmonic Filter Diagram 8415563H06...
  • Page 297 UHF1 Radio Parts List (RF Board) 3-39 UHF1 Radio Parts List (RF Board) Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description 8415563H06 Part No. Part No. Part No. C121 2113944A40 CAP CER CHP 100.0PF 50V C172 2113944C45 CAP CER CHP 100.0PF 50V...
  • Page 298 3-40 UHF1 Radio Parts List (RF Board) Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Part No. Part No. Part No. Part No. C279 2113946N03 CAP CER CHP 2.2UF 16V C317 2113944A24 CAP CER CHP 9.1PF 50V +/-...
  • Page 299 UHF1 Radio Parts List (RF Board) 3-41 Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Part No. Part No. Part No. Part No. C555 2113944A40 CAP CER CHP 100.0PF 50V D101 4813978C06 DIODE DUAL 75V A2X...
  • Page 300 3-42 UHF1 Radio Parts List (RF Board) Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Part No. Part No. Part No. Part No. R108 0613952Q91 CER CHIP RES 5600 OHM R242 0613952Q56 CER CHIP RES 200 OHM 5%...
  • Page 301 CER.DISCR. BOTTOM CDBCA455CX36-TC SH303 2680509Z02 SHIELD, MIXER 8415563H06 BOARD, PC, UHF1 RF SH304 2680624Z02 SHIELD, MIXER DIODE * Motorola Depot Servicing only SH322 2686528Z02 SHIELD, IF SECTION ** Not Servicable SH323 2615924H01 SHIELD, CRYSTAL FILTER T301 2515121H01 BALUN, TRANSFORMER T302...
  • Page 302 UHF1 PCB and Schematic Diagrams THIS PAGE INTENTIONALLY LEFT BLANK...
  • Page 303 UHF1 PCB and Schematic Diagrams 3-45 UHF1 PCB and Schematic Diagrams VR444 PB502 PB501 C597 PB504 SH323 C338 FL302 VR501 C325 C349 C598 C599 J200 R506 TP201 SH201 C220 C324 Q505 L311 U247 R505 L203 R355 R324 C352 C260 Q502 C512 C513 Q210...
  • Page 304 3-46 UHF1 PCB and Schematic Diagrams M1002 M1001 C522 SH322 C523 C525 R376 L505 C526 C527 C334 C528 R373 C529 C350 C530 C531 R372 C383 S502 R366 R359 R374 C532 L331 C533 R368 R371 R378 C359 C534 C535 R370 C390 C536 C327 C537...

  • Page 305: 8471441L01

    UHF1 PCB and Schematic Diagrams 3-47 RTA2 RTA2 C525 C526 C527 C528 C529 C530 C531 C532 C533 C534 C535 C536 C537 C538 DEMOD DEMOD 100pF 100pF 100pF 100pF 100pF 100pF 100pF 100pF 100pF 100pF 100pF 100pF 100pF 100pF LVZIF_SEL LVZIF_SEL J200-1 J200-2 DACRX...
  • Page 306 3-48 UHF1 PCB and Schematic Diagrams RADIO_CODE B501 M1001 C597 C598 C599 L505 BATTERY_CONTACT 390nH 4.7pF 3.9pF BATT_CODE DATA M1002 BATT+ F501 M1003 CONN_J S502 BATT- MECH_SWB+ SWITCH M1004 LI_ION B503 VR439 TAB2 M1005 C601 E102 C602 B504 C502 BLM21PG221SN1 VR506 CR501 24pF...
  • Page 307 UHF1 PCB and Schematic Diagrams 3-49 DACRx C322 82pF R342 100K L310 150nH C315 R308 R310 R305 C314 100pF 0.1uF R304 R309 C380 .01uF L304 C321 CR306 180nH 100pF C306 T301 XFMR C309 C308 100pF R306 R307 100pF C312 100K 100K C310 C316...
  • Page 308 3-50 UHF1 PCB and Schematic Diagrams U302-1 R345 R360 TC7W04F FL303 C352 CFWC455E 0.1uF OUT 2 U302-3 TC7W04F U302-4 PWR_GND R355 100K BW_SEL U302-2 CR312 R321 R324 TC7W04F FL304 C362 CFWC455G 0.1uF 1 IN R361 CR313 R350 3.3K R358 2.4K C329 0.1uF C357...
  • Page 309 UHF1 PCB and Schematic Diagrams 3-51 U210 U211 C257 C265 TC7ST04FU C296 TC7ST04FU 0.1uF 100pF C258 .01uF U247 ADP3300 C259 SWB+ .01uF (SOURCE) CR201 C291 10uF C294 C293 SWB+ L202 100pF 0.47uF U248 2.2uH L203 LP2980 C277 C278 2.2uH C228 C230 C229 100pF...
  • Page 310 3-52 UHF1 PCB and Schematic Diagrams C281 R245 100pF R242 C250 C276 C285 L243 7.5pF C286 2.2uF 100pF RESONATOR 0.1uF C246 100pF L281 L273 R241 390nH 33nH C242 7.5pF C272 C273 0.1uF C243 L271 L242 R244 7.5pF 68nH 220nH C245 RX_INJ 2.4pF TX_INJ...
  • Page 311 UHF1 PCB and Schematic Diagrams 3-53 UNSWB+ E101 BEAD R102 0.075 L107 C114 C123 33.47nH 100pF 10uF C172 0.1uF C109 L106 100pF 7.66nH Microstrip Microstrip TX_OUT R106 R172 Q110 L108 L109 C121 C160 L112 R175 4.22nH 100pF 100pF 22nH Microstrip C111 C112 C113...
  • Page 312 3-54 UHF1 PCB and Schematic Diagrams THIS PAGE INTENTIONALLY LEFT BLANK...
  • Page 313 UHF1 Radio Parts List (RF Board) UHF1 Radio Parts List (RF Board) Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description 8471441L01 Part No. Part No. Part No. C122 2113944A40 CAP CER CHP 100.0PF 50V C174 2113944A40 CAP CER CHP 100.0PF 50V...
  • Page 314 UHF2 Radio Parts List (RF Board) Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Part No. Part No. Part No. Part No. C279 2113946N03 CAP CER CHP 2.2UF 16V C316 2113944C20 CAP CER CHP 3.9PF 50V +/-...
  • Page 315 UHF1 Radio Parts List (RF Board) Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Part No. Part No. Part No. Part No. C546 2113944A40 CAP CER CHP 100.0PF 50V CR303 4815048H01 SOT MMBD353 DIODE DUAL L112 2414032B45 IDCTR,WW,22NH,5%,1A,.12...
  • Page 316 UHF2 Radio Parts List (RF Board) Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Part No. Part No. Part No. Part No. R101 0613952H58 CER CHIP RES 240 OHM 5 R201 0613952R23 CER CHIP RES 82K OHM 5%...
  • Page 317 2680511Z02 SHIELD, SYNTHESIZER TEF RESN SH202 2680511Z02 SHIELD, SYNTHESIZER 2880658Z08 SMA CONNECTOR SH241 2604120G02 AOBA VCO SHIELD * Motorola Depot Servicing only SH242 2680514Z02 SHIELD, VCO BOTTOM/ ** Not Servicable LVZIF SH301 2686583Z02 SHIELD, RECEIVER FRONT END TOP SH302 2680555Z02...
  • Page 318 3-60 UHF1 PCB and Schematic Diagrams THIS PAGE INTENTIONALLY LEFT BLANK...

  • Page 319: Uhf Narrow Band Pcb/Schematic Diagrams And Radio Parts List (Rf Board)

    UHF Narrow Band PCB/Schematic Diagrams and Radio Parts List (RF Board) 3-61 UHF Narrow Band PCB/Schematic Diagrams and Radio Parts List (RF Board) VR444 PB502 PB501 C597 PB504 C338 FL302 C325 VR501 C349 C598 C599 J200 TP201 R506 SH201 C324 Q505 C220 L311...
  • Page 320 3-62 UHF Narrow Band PCB/Schematic Diagrams and Radio Parts List (RF Board) C522 C525 SH322 R376 C523 L505 C526 C527 C334 C528 R373 C529 C350 C530 C531 R372 R374 S502 R366 C532 L331 C383 C533 R371 R359 C534 R368 C535 C359 R378 C536...
  • Page 321 UHF Narrow Band PCB/Schematic Diagrams and Radio Parts List (RF Board) 3-63 RADIO_CODE BATTERY_CONTACT B501 C597 C598 C599 L505 390nH 43pF 4.7pF 3.9pF BATT_CODE DATA BATT+ F501 CONN_J S502 BATT- MECH_SWB+ SWITCH LI_ION B503 TAB2 VR439 E102 C602 C601 B504 C502 BLM21PG221SN1 VR506...
  • Page 322 3-64 UHF Narrow Band PCB/Schematic Diagrams and Radio Parts List (RF Board) DACRx C322 82pF R342 100K L310 150nH C315 R308 R310 R305 C314 100pF 0.1uF R304 C380 R309 .01uF L304 C321 CR306 180nH 100pF C306 T301 XFMR C309 C308 100pF R306 R307...
  • Page 323 UHF Narrow Band PCB/Schematic Diagrams and Radio Parts List (RF Board) 3-65 U302-1 R345 R360 TC7W04F FL303 C352 CFWC455E 0.1uF OUT 2 U302-3 TC7W04F U302-4 PWR_GND R355 100K BW_SEL U302-2 CR312 R324 R321 TC7W04F FL304 C362 CFWC455G 0.1uF 1 IN R361 CR313 R350...
  • Page 324 3-66 UHF Narrow Band PCB/Schematic Diagrams and Radio Parts List (RF Board) U211 U210 TC7ST04FU TC7ST04FU C296 C265 C257 0.1uF 100pF C258 .01uF U247 ADP3300 SWB+ C259 .01uF (SOURCE) CR201 C291 10uF C294 C293 SWB+ L202 100pF 0.47uF U248 2.2uH L203 LP2980 C277...
  • Page 325 UHF Narrow Band PCB/Schematic Diagrams and Radio Parts List (RF Board) 3-67 C281 R245 100pF R242 C250 C276 C286 C285 7.5pF 0.1uF 2.2uF 100pF L243 RESONATOR C246 L281 L273 R241 100pF 390nH 33nH C242 7.5pF C272 C273 0.1uF C243 L271 L242 7.5pF 68nH...
  • Page 326 3-68 UHF Narrow Band PCB/Schematic Diagrams and Radio Parts List (RF Board) UNSWB+ E101 BEAD R102 0.075 L107 C114 C123 33.47nH 100pF 10uF C172 0.1uF C109 L106 100pF 7.66nH Microstrip Microstrip TX_OUT R106 R172 Q110 L108 L109 C121 C160 L112 R175 100pF 4.22nH...
  • Page 327 UHF Narrow Band PCB/Schematic Diagrams and Radio Parts List (RF Board) 3-69 ANT_BIAS SH100 C108 L105 SHIELD 100pF 390nH TX_OUT HF SHIELD CR101 L101 L102 L104 17.02nH 17.02nH 19.61nH RX_IN CR102 C101 C102 C103 C104 C106 C107 100pF 8.2pF 13pF 7.5pF 4.7pF 3.3pF...
  • Page 328 3-70 UHF Narrow Band PCB/Schematic Diagrams and Radio Parts List (RF Board) THIS PAGE INTENTIONALLY LEFT BLANK...
  • Page 329 B503 3980502Z01 CONTACT, BACKUP B+ (not C122 2113944A40 CAP CER CHP 100.0PF 50V C169 2113944A19 CAP CER CHP 5.6PF 50V used in GP344) +/- 0.5PF C231 2113946K02 CAP CER CHP 0.10UF 16V B504 3980501Z01 CONTACT, BACKUP B- (not C123 2313960F04...
  • Page 330 3-72 UHF Narrow Band PCB/Schematic Diagrams and Radio Parts List (RF Board) Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Part No. Part No. Part No. Part No. C258 2113945B02 CAP CER CHP 10,000PF 25V C303 2113944C20 CAP CER CHP 3.9PF 50V...
  • Page 331 UHF Narrow Band PCB/Schematic Diagrams and Radio Parts List (RF Board) 3-73 Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Part No. Part No. Part No. Part No. C530 2113944A40 CAP CER CHP 100.0PF 50V C555 2113944A40 CAP CER CHP 100.0PF 50V...
  • Page 332 3-74 UHF Narrow Band PCB/Schematic Diagrams and Radio Parts List (RF Board) Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Part No. Part No. Part No. Part No. L301 2479990C01 AIR WND COIL/GREEN PB505 4070354A01 LIGHT TOUCH SWITCH-...
  • Page 333 CER CHIP RES 1800 OHM SH201 2680511Z02 SHIELD, SYNTHESIZER 8415563H06 5 0402 SH202 2680511Z02 SHIELD, SYNTHESIZER R365 0613952Q75 CER CHIP RES 1200 OHM SH241 2604120G02 AOBA VCO SHIELD * Motorola Depot Servicing only 5 0402 SH242 2680514Z02 SHIELD, VCO BOTTOM/ ** Not Serviceable LVZIF...
  • Page 334 3-76 UHF Narrow Band PCB/Schematic Diagrams and Radio Parts List (RF Board) THIS PAGE INTENTIONALLY LEFT BLANK...
  • Page 335 Compact Professional Portable Radios UHF2 (450-527MHz) Service Information Issue: July 2007...
  • Page 336 Accordingly, any copyrighted Motorola computer programs contained in the Motorola products described in this manual may not be copied or reproduced in any manner without the express written permission of Motorola. Furthermore, the purchase of Motorola...
  • Page 337 Table of Contents Chapter 1 THEORY OF OPERATION 1.0 Introduction ......................1-1 2.0 Transmitter ......................1-1 2.1 General ......................1-1 3.0 Receiver.......................1-3 3.1 Receiver Front-End ..................1-3 3.2 Receiver Back-End..................1-4 3.3 Automatic Gain Control Circuit ...............1-5 4.0 Frequency Generation Circuitry ................1-6 4.1 Synthesizer.....................1-6 4.2 Voltage Controlled Oscillator (VCO) ...............1-8 Chapter 2 TROUBLESHOOTING CHARTS 1.0 Introduction ......................2-1...
  • Page 338 THIS PAGE INTENTIONALLY LEFT BLANK...

  • Page 339: Chapter 1 Theory Of Operation

    Chapter 1 THEORY OF OPERATION Introduction This Chapter provides a detailed theory of operation for the UHF circuits in the radio. Schematic diagrams and board layout diagrams are included in Chapter 4 in this Section of the manual. Transmitter P C I C Antenna Vcontrol Vcontrol...
  • Page 340 THEORY OF OPERATION This RF power amplifier is capable of supplying an output power of 0.3W (pin 6 and 7) with an input signal of 2mW (3dBm) (pin16). The current drain would typically be 160mA while operating in the frequency range of 450-527MHz. The PRF1507 LDMOS PA is capable of supplying an output power of 7W with an input signal of 0.3W.

  • Page 341: Receiver

    Receiver Receiver The UHF receiver consists of a front end, back end and automatic gain control circuits. A block diagram of the UHF receiver is shown in Figure 2-2 . Antenna Pin Diode Varactor Varactor Antenna Crystal RF Amp Mixer IF Amp Tuned Filter Tuned Filter...

  • Page 342: Receiver Back-End

    THEORY OF OPERATION Both the pre and post-RF amplifier varactor tuned filters have similar responses. The 3 dB bandwidth of the filter is about 50 MHz. This enables the filters to be electronically controlled by using a single control voltage which is DACRx . The output of the post-RF amplifier filter which is connected to the passive double balanced mixer consists of T301, T302 and CR306.

  • Page 343: Automatic Gain Control Circuit

    Receiver Automatic Gain Control Circuit The front end automatic gain control circuit is to provide automatic gain reduction of the front end RF amplifier via feedback. This action is necessary to prevent overloading of back end circuits. This is achieved by drawing some of the output power from the RF amplifier’s output. At high radio frequencies, capacitor C331 provides the low impedance path to ground for this purpose.

  • Page 344: Frequency Generation Circuitry

    THEORY OF OPERATION Frequency Generation Circuitry Dual Tran- sistor Voltage Multiplier Rx Out Matching Pass Mixer Network Filter Aux3 VCOBIC Rx VCO Circuit Vmult1 U241 Aux4 Synthesizer Vmult2 U201 Loop Filter Tx Out Attenuator PA Driver 16.8 MHz Ref. Osc. MOD Out Tx VCO Circuit Modulating...
  • Page 345 Frequency Generation Circuitry Both the normal and adapt charge pumps get their supply from the capacitive voltage multiplier which is made up of C258, C259, C228, triple diode CR201 and level shifters U210 and U211. Two 3.3V square waves ( 180 deg out of phase) are first shifted to 5V, then along with regulated 5V , put through arrays of diodes and capacitors to build up 13.3V at pin 47 of U201.

  • Page 346: Voltage Controlled Oscillator (Vco)

    THEORY OF OPERATION Voltage Controlled Oscillator - (VCO) AUX3 (U201 Pin2) Level Shifter AUX4 (U201 Pin3) Network U201 Pin 32 Prescaler Out TRB_IN Pin 20 Pin 19 Pin 12 Pin7 Rx-SW TX/RX/BS Pin13 Tx-SW Switching Network LO RF INJECTION Presc Vcc-Superfilter (U201 Pin28) Matching...
  • Page 347 Frequency Generation Circuitry The VCOBIC(U241) is operated at 4.54 V (VSF) and Fractional-N synthesizer (U201) at 3.3V. This difference in operating voltage requires a level shifter consisting of Q260 and Q261 on the TRB line. The operation logic is shown in Table Table 1-1. Table 1-1 Level Shifter Logic Desired Mode AUX 4...
  • Page 348 1-10 THEORY OF OPERATION THIS PAGE INTENTIONALLY LEFT BLANK...

  • Page 349: Troubleshooting Charts

    Chapter 2 TROUBLESHOOTING CHARTS Introduction This section contains detailed troubleshooting charts. These charts should be used as a guide in determining the problem areas. They are not a substitute for knowledge of circuit operation and astute troubleshooting techniques. It is advisable to refer to the related detailed circuit descriptions in the theory of operation sections prior to troubleshooting a radio.
  • Page 350 TROUBLESHOOTING CHARTS START Bad SINAD Bad 20dB Quieting No Recovered Audio Audio at Check Controller pin 27 of U301? Spray of inject 1st IF into XTAL Filter IF Freq: 45.1MHz Check Q320 bias circuitry for faults. Audio heard? Rotate Freq. Knob Check 2nd LO Control Voltage at C363 Activity on...
  • Page 351 Introduction Inject RF into J101 Q302 Trace IF signal collector OK? from L311 to Signal at IF signal Q302. Check for L311? present? bad XTAL filter. Before replacing U301, check U301 voltages; 1st LO O/P trace IF signal Signal at Check FGU path.
  • Page 352 TROUBLESHOOTING CHARTS START No Power Is There B+ Check Q111 Bias for Ant switch Is Control Is Current Check PCIC Voltage High or High Check Drive to Module 1. Check Pin Diodes 2. Check Harmonic Filter Is Drive Troubleshoot Inspect/Repair Tx. Output Network Inspect PA Network/ Check Power Out of...
  • Page 353 Introduction 3.3V at U201 Check U248, Start pins e5, 20, 34 L201 & L202 & 36 Visual Correct Check CR201, check of the Problem U210, U211, C258, Board OK? C259 & C228 Is U201 Pin 47 16.8MHz Is 16.8MHz at pin 6 of Replace AT = 13 VDC signal at...
  • Page 354 TROUBLESHOOTING CHARTS START Change U241 No LO? Change L253 O/C? L253 Pin 10 TRB = 5V? Tx Carrier? >1V? VCO OK Check R245 for dry joint or faulty AUX 3 Check High? R260 Check U201 Pin 2 for 3.2V Change L243 V ctrl 0V or 13V?
  • Page 355 Introduction MCU Check Press PTT. Red LED does not Before replacing light up Audio at Power Up Not able to MCU, check SPI AudioPA Alert Tone program RF AUDIO clock, SPI data, (U420) Board ICs J403 Audio and RF IC select input at Pin 2 &...
  • Page 356 TROUBLESHOOTING CHARTS THIS PAGE INTENTIONALLY LEFT BLANK...

  • Page 357: Notes For All Schematics And Circuit Board

    = 1000), and capacitances are in picofarads (pF) or microfarads (µF). 2. DC voltages are measured from point indicated to chassis ground using a Motorola DC multime- ter or equivalent. Transmitter measurements should be made with a 1.2 µH choke in series with the voltage probe to prevent circuit loading.

  • Page 358: Allocation Of Schematics And Circuit Boards

    UHF2 PCB/SCHEMATICS/PARTS LISTS UHF2 PCB/SCHEMATICS/PARTS LISTS Allocation of Schematics and Circuit Boards UHF2 (450-527MHz) The UHF2 schematics and the related PCB and parts list are shown in the table below. Table 4-1 UHF2 Diagrams and Parts Lists PCB : 8404102G03/G04/G05 Main Board Top Side Page 3-5 8404102G03/G04/G05 Main Board Bottom Side Page 3-6...
  • Page 359 Allocation of Schematics and Circuit Boards PCB : 8471475L01 Main Board Top Side Page 3-37 8471475L01 Main Board Bottom Side Page 3-38 SCHEMATICS UHF2 Controls and Switches (Sht 1 of 2) (8471475L01) Page 3-39 UHF2 Controls and Switches (Sht 2 of 2) (8471475L01) Page 3-40 UHF2 Receiver Front End...
  • Page 360 UHF2 PCB/SCHEMATICS/PARTS LISTS THIS PAGE INTENTIONALLY LEFT BLANK...
  • Page 361 UHF2 PCB and Schematic Diagrams UHF2 PCB and Schematic Diagrams PB503 PB502 PB501 PB504 VR444 R300 R352 C397 R314 RT301 R321 VR501 C328 C363 C362 C325 R335 R338 TP201 L325 J200 R506 R325 C385 C351 C353 C352 C384 SH201 R206 Q316 C349 R355...
  • Page 362 UHF2 PCB and Schematic Diagrams M301 M101 C523 C522 L505 C525 C526 C527 C528 VR506 L330 C359 C529 C530 C277 C531 S502 C338 C532 C357 C533 C358 C534 C535 R350 C344 C536 C390 C537 C278 R344 C538 C360 U248 C383 C539 C540 R311...
  • Page 363 UHF2 PCB and Schematic Diagrams PB504 PB501 PB502 C505 VR444 R300 R352 C397 FL201 R507 R321 FL301 R314 RT301 C363 C325 C362 R335 VR501 C328 L332 TP201 C216 R338 L325 J200 R506 R325 C385 C353 SH201 C351 C384 C323 C294 C352 U247 R206...
  • Page 364 UHF2 PCB and Schematic Diagrams C522 C525 C526 L505 C527 VR441 C528 L330 VR506 C359 C529 C530 C531 C277 S502 C338 C532 C533 C358 C534 C357 Y201 C535 R350 C536 C390 C344 C537 C278 U248 R344 C538 C383 R205 C327 C539 C360 C540...
  • Page 365 UHF2 PCB and Schematic Diagrams PB502 PB501 PB504 R300 R352 VR444 C397 RT301 R314 R321 VR501 C328 C363 C362 R335 C325 TP201 R338 J200 L325 C385 R325 R506 C353 SH201 C384 C352 C351 R206 C220 L311 Q316 Q505 C349 Q320 R355 Q315 C350...
  • Page 366 3-10 UHF2 PCB and Schematic Diagrams R131 R132 CR105 R130 C373 R109 R349 C133 Q310 Q111 J101 C172 R172 R330 R331 L281 CR241 C371 C372 C138 C151 C152 R241 R101 R242 CR243 CR160 C150 C246 C250 C252 C130 C170 CR242 C254 C128 C245...
  • Page 367 UHF2 PCB and Schematic Diagrams 3-11 C538 C537 C536 C535 C534 C533 C532 C531 C530 C529 C528 C527 C526 C525 100pF 100pF 100pF 100pF 100pF 100pF 100pF 100pF 100pF 100pF 100pF 100pF 100pF 100pF J200 J200-1 J200-2 J200-3 J200-4 J200-5 J200-6 EMER J200-7...
  • Page 368 3-12 UHF2 PCB and Schematic Diagrams RADIO_CODE B501 L505 UNSWB+ BATTERY_CONTACT 390nH DATA BATT_CODE BATT+ F501 CONN_J S502 BATT- SWITCH MECH_SWB+ B503 VR439 LI_ION CR501 TAB2 B504 C502 VR506 C503 0.47uF TAB1 6.8V 100pF R507 C505 6.8V VR501 100pF Vdda PB501 SWITCH 3 A2...
  • Page 369 UHF2 PCB and Schematic Diagrams 3-13 DACRx C322 82pF R342 -63.8dBm@45.1MHz 100K L310 150nH C315 R310 R308 R305 C314 100pF 0.1uF R304 R309 C380 .01uF -51.7dBm@450.125MHz C321 CR306 L304 -52.6dBm@526.925MHz 100pF 180nH C306 T301 XFMR C309 C308 100pF R306 R307 100pF C312 100K...
  • Page 370 3-14 UHF2 PCB and Schematic Diagrams L331 R343 2.20uH Vdd_FILTERED Vdda C382 (SOURCE) 10uF DEMOD R350 C348 C347 C345 C344 C346 100K 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF C390 C329 100pF 0.1uF C343 0.22uF R344 R345 R355 2.628V 3.185V Q320 C342 C357 C384 C383...
  • Page 371 UHF2 PCB and Schematic Diagrams 3-15 U210 C257 U211 TC7ST04FU 100pF C296 C265 TC7ST04FU 0.1uF C258 7.5V .01uF 1.65V U247 ADP3300 C259 SWB+ .01uF CR201 (SOURCE) C294 C293 C291 100pF 0.47uF 3 K3 0.47uF A3 4 4V_3.3V L202 U248 2 K2 A2 5 2.2uH L203...
  • Page 372 3-16 UHF2 PCB and Schematic Diagrams C281 R245 100pF R242 C250 L243 4.3pF C276 C285 C286 4.6V 2.2uF 100pF 0.1uF RESONATOR C246 L281 L273 100pF R241 390nH 18nH C242 4.3pF C272 C273 1.1pF 0.1uF C243 L271 L242 R244 4.3pF 27nH 22nH C245 RX_INJ...
  • Page 373 UHF2 PCB and Schematic Diagrams 3-17 E101 BEAD R102 UNSWB+ L107 C114 C123 C108 33.47nH 100pF 10uF 100pF L105 390nH C172 UNSWB+ 0.1uF R106 C109 L106 100pF 7.66nH Microstrip Microstrip R172 L108 L109 C121 C160 L112 4.22nH 11.03nH 100pF 56pF 390nH Q110 Microstrip...
  • Page 374 3-18 UHF2 PCB and Schematic Diagrams THIS PAGE INTENTIONALLY LEFT BLANK...
  • Page 375 Contact, Backup B+ C172 2113743E20 0.10 uF, 10% C259 2113743L41 10000 pF, 10% C326 2113743L41 10000 pF, 10% (not used in GP344) C173 2113743M08 22000 pF, +80% / -20% C260 2113743N50 100 pF, 5% C327 2113743N50 100 pF, 5% B504...
  • Page 376 3-20 UHF2 Radio Parts List (RF Board) Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Part No. Part No. Part No. Part No. C384 2113743N44 56.0 pF, 5% CR105 5185963A15 Temperature Sensor L273 2462587V25 18 nH, 5%...
  • Page 377 0, 5% R509 0662057M01 0, 5% (not used in GP344) R510 0662057M01 0, 5% R511 NOT PLACED RT300 0680590Z01 Thermistor 33k RT301 NOT PLACED S501 4080710Z01 Freq Switch (used in GP344) Freq Switch (used in GP344) 4080710Z02 S502 1880619Z02 Potentiometer (Volume)
  • Page 378 3-22 UHF2 PCB and Schematic Diagrams THIS PAGE INTENTIONALLY LEFT BLANK...
  • Page 379 UHF2 PCB and Schematic Diagrams (EPP) 3-23 UHF2 PCB/Schematic Diagrams and Parts List (EPP) VR444 PB502 PB501 C597 PB504 C338 FL302 C325 VR501 C349 C598 C599 TP201 J200 R506 SH201 U247 C324 Q505 C220 L311 L203 R355 SH323 R505 Q502 C260 SH303 C512...
  • Page 380 3-24 UHF2 PCB and Schematic Diagrams (EPP) C522 C525 R376 L505 C526 C334 C527 C528 R373 C529 C350 C530 C531 C383 S502 C532 R374 R372 C533 R366 R368 R359 R378 C534 C359 R371 C535 C390 C536 C327 R375 R370 C537 C538 C348 L325...

  • Page 381: 8416243H04

    UHF2 PCB and Schematic Diagrams (EPP) 3-25 B501 C597 C598 C599 L505 BATTERY_CONTACT UNSWB+ 390nH 43pF 4.7pF 3.9pF BATT_CODE DATA E102 BATT+ F501 BLM21PG221SN1 CONN_J S502 BATT- MECH_SWB+ SWITCH LI_ION B503 CR501 TAB2 C503 100pF VR506 B504 C502 0.47uF TAB1 6.8V C600 C538...
  • Page 382 3-26 UHF2 PCB and Schematic Diagrams (EPP) DACRx C322 82pF R342 100K L310 150nH C315 R308 R310 R305 C314 100pF 0.1uF R304 C380 R309 .01uF L304 C321 CR306 180nH 100pF C306 T301 XFMR C309 C308 100pF R306 R307 100pF C312 100K 100K C310...
  • Page 383 UHF2 PCB and Schematic Diagrams (EPP) 3-27 U302-1 TC7W04F C352 0.1uF R345 R360 FL303 U302-4 CFWC455E PWR_GND U302-3 1 IN TC7W04F R355 100K U302-2 TC7W04F BW_SEL CR312 R321 R324 C362 CR313 0.1uF FL304 CFWC455G 1 IN R361 R350 R358 3.3K 2.4K C329 C357...
  • Page 384 3-28 UHF2 PCB and Schematic Diagrams (EPP) U210 U211 C257 C265 TC7ST04FU C296 TC7ST04FU 100pF 0.1uF C258 .01uF U247 ADP3300 C259 SWB+ .01uF (SOURCE) CR201 C291 C294 C293 100pF 0.47uF 0.47uF SWB+ L202 U248 2.2uH L203 LP2980 C277 C278 C228 2.2uH C230 C229...
  • Page 385 UHF2 PCB and Schematic Diagrams (EPP) 3-29 C281 R245 100pF R242 C250 C276 C285 L243 4.3pF C286 2.2uF 100pF RESONATOR 0.1uF C246 100pF L281 L273 R241 390nH 18nH C242 4.3pF C272 C273 1.1pF 0.1uF C243 L271 L242 R244 4.3pF 27nH 22nH C245 RX_INJ...
  • Page 386 3-30 UHF2 PCB and Schematic Diagrams (EPP) UNSWB+ E101 R102 BEAD L107 C123 33.47nH 10uF C114 100pF C172 0.1uF C109 L106 100pF 7.66nH TX_OUT R106 Microstrip Microstrip Q110 R172 L108 R191 C121 C160 L112 4.22nH 100pF 390nH 56pF R175 Microstrip C118 C181 100pF...
  • Page 387 UHF2 PCB and Schematic Diagrams (EPP) 3-31 ANT_BIAS SH100 C108 L105 SHIELD 100pF 390nH TX_OUT HF SHIELD CR101 L101 L102 L104 12.39nH 12.39nH 12.39nH RX_IN CR102 C101 C102 C103 C104 C106 C107 100pF 7.5pF 13pF 6.2pF 4.7pF 3.3pF C188 R170 36pF RF_JACK R101...
  • Page 388 3-32 UHF2 PCB and Schematic Diagrams (EPP) THIS PAGE INTENTIONALLY LEFT BLANK...
  • Page 389 UHF2 Radio Parts List (RF Board) (EPP) 3-33 UHF2 Radio Parts List (RF Board) Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description (EPP) 8416243H04 Part No. Part No. Part No. C122 2113944A40 CAP CER CHP 100.0PF 50V C172 2113945D04...
  • Page 390 3-34 UHF2 Radio Parts List (RF Board) (EPP) Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Part No. Part No. Part No. Part No. C281 2113944A40 CAP CER CHP 100.0PF 50V C319 2113944A16 CAP CER CHP 4.3PF 50V +/-...
  • Page 391 UHF2 Radio Parts List (RF Board) (EPP) 3-35 Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Part No. Part No. Part No. Part No. CR305 4885055Y01 DIODE VARACTOR PB-FREE L112 2414032B42 IDCTR,WW,12NH,5%,1A,.09 L305 2414032F23 IDCTR,WW,12NH,5%,600MA, Q505...
  • Page 392 R305 0613952Q65 CER CHIP RES 470 OHM 5 R349 0613958J74 CER CHIP RES 0.0 OHM SH242 2680514Z02 SHIELD, VCO BOTTOM/ * Motorola Depot Servicing only 0402 JMP 0805 LVZIF ** Not Serviceable R306 0613952R25 CER CHIP RES 100K OHM R350...
  • Page 393 UHF2 PCB and Schemtaic Diagrams 3-37 UHF2 PCB/Schematic Diagrams and Radio Parts List (RF Radio) VR444 PB502 PB501 C597 PB504 C338 FL302 C325 VR501 C349 C598 C599 J200 R506 TP201 SH201 C324 Q505 C220 L311 U247 L203 R355 SH323 R505 C260 Q502 SH303...
  • Page 394 3-38 UHF2 PCB and Schemtaic Diagrams M1001 M1002 C522 C525 R376 L505 C526 C527 C334 C528 R373 C529 C350 C530 C531 R366 R359 C383 S502 C532 R372 R374 C533 R378 R368 C534 C359 R371 C535 C390 C536 C327 R375 R370 C537 C348 C538...

  • Page 395: 8471475L01

    UHF2 PCB and Schemtaic Diagrams 3-39 RTA2 RTA2 C525 C526 C527 C528 C529 C530 C531 C532 C533 C534 C535 C536 C537 C538 DEMOD DEMOD 100pF 100pF 100pF 100pF 100pF 100pF 100pF 100pF 100pF 100pF 100pF 100pF 100pF 100pF LVZIF_SEL LVZIF_SEL J200-1 J200-2 DACRX...
  • Page 396 3-40 UHF2 PCB and Schemtaic Diagrams RADIO_CODE B501 M1001 C597 C598 C599 L505 BATTERY_CONTACT 4.7pF 3.9pF 390nH BATT_CODE DATA M1002 BATT+ F501 M1003 CONN_J S502 BATT- MECH_SWB+ SWITCH M1004 LI_ION B503 VR439 TAB2 E102 M1005 C601 C602 BLM21PG221SN1 VR506 B504 C502 24pF CR501...
  • Page 397 UHF2 PCB and Schemtaic Diagrams 3-41 DACRx C322 82pF R342 100K L310 150nH C315 R308 R310 R305 C314 100pF 0.1uF R304 R309 C380 .01uF L304 C321 CR306 180nH 100pF C306 T301 XFMR C309 C308 100pF R306 R307 100pF C312 100K 100K C310 C316...
  • Page 398 3-42 UHF2 PCB and Schemtaic Diagrams U302-1 TC7W04F C352 R345 R360 0.1uF FL303 U302-4 CFWC455E PWR_GND U302-3 1 IN TC7W04F R355 100K U302-2 TC7W04F BW_SEL R321 CR312 R324 C362 CR313 0.1uF FL304 CFWC455G 1 IN R361 R350 R358 3.3K 2.4K C329 C357 0.1uF...
  • Page 399 UHF2 PCB and Schemtaic Diagrams 3-43 U210 U211 C257 TC7ST04FU C296 TC7ST04FU C265 100pF 0.1uF C258 .01uF U247 ADP3300 SWB+ C259 .01uF (SOURCE) CR201 C291 C294 C293 100pF 0.47uF 0.47uF SWB+ L202 U248 2.2uH L203 LP2980 C277 C278 2.2uH C228 C230 C229 100pF...
  • Page 400 3-44 UHF2 PCB and Schemtaic Diagrams C281 R245 100pF R242 C250 L243 4.3pF C276 C285 C286 2.2uF 100pF RESONATOR 0.1uF C246 L281 L273 100pF R241 390nH 18nH C242 4.3pF C272 C273 1.1pF 0.1uF C243 L271 L242 R244 4.3pF 27nH 22nH C245 RX_INJ 2.7pF...
  • Page 401 UHF2 PCB and Schemtaic Diagrams 3-45 UNSWB+ E101 BEAD R102 L107 C123 33.47nH 10uF C114 100pF C172 0.1uF C109 L106 100pF 7.66nH TX_OUT R106 Microstrip Microstrip Q110 R172 L108 R191 C121 C160 L112 4.22nH 100pF 390nH 56pF R175 Microstrip C118 C181 100pF C111...
  • Page 402 3-46 UHF2 PCB and Schemtaic Diagrams THIS PAGE INTENTIONALLY LEFT BLANK...
  • Page 403 UHF2 Radio Parts List (RF Board) 3-47 UHF2 Radio Parts List (RF Board) Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description 8471475L01 Part No. Part No. Part No. C123 2313960F04 CAP TANT 33 UF 10% 16V C188 2113944A83 CAP,FXD,36PF,+5%,-5%,50V-...
  • Page 404 UHF2 Radio Parts List (RF Board) Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Part No. Part No. Part No. Part No. C289 2113944A40 CAP CER CHP 100.0PF 50V C321 2113944A40 CAP CER CHP 100.0PF 50V...
  • Page 405 UHF2 Radio Parts List (RF Board) 3-49 Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Part No. Part No. Part No. Part No. CR306 4815923H02 SCHOTTKY DIODE-NEW L117 2414017P17 IDCTR,CHIP,22NH,5%,300M L311 2414017K32 IDCTR,CHIP,560NH,5%,50M R108 0613952Q91 CER CHIP RES 5600 OHM 5 LEADFREE A,.88OH...
  • Page 406 R303 0613952Q77 CER CHIP RES 1500 OHM 5 R346 0613952R05 CER CHIP RES 15K OHM 5% SH201 2680511Z02 SHIELD, SYNTHESIZER * Motorola Depot Servicing only 0402 0402 SH202 2680511Z02 SHIELD, SYNTHESIZER ** Not Servicable R304 0613952R03 CER CHIP RES 12K OHM 5%...
  • Page 407 UHF2 PCB and Schematic Diagrams 3-51 UHF2 Circuit Board/Schematic Diagrams and Parts List PB503 PB502 PB501 PB504 VR444 R300 R352 C397 R314 RT301 R321 VR501 C328 C363 C362 C325 R335 R338 TP201 L325 J200 R506 R325 C385 C351 C353 C352 C384 SH201 R206...
  • Page 408 3-52 UHF2 PCB and Schematic Diagrams M301 M101 C523 C522 L505 C525 C526 C527 C528 VR506 L330 C529 C359 C530 C277 C531 S502 C338 C357 C532 C533 C358 C534 C535 R350 C344 C536 C390 C537 C278 R344 C538 C360 U248 C383 C539 C540...

  • Page 409: 8485641Z02

    UHF2 PCB and Schematic Diagrams 3-53 C538 C537 C536 C535 C534 C533 C532 C531 C530 C529 C528 C527 C526 C525 100pF 100pF 100pF 100pF 100pF 100pF 100pF 100pF 100pF 100pF 100pF 100pF 100pF 100pF J200 J200-1 J200-2 J200-3 J200-4 J200-5 EMER J200-6 J200-7...
  • Page 410 3-54 UHF2 PCB and Schematic Diagrams DACRx C322 82pF R342 -63.8dBm@45.1MHz 100K L310 150nH R310 C315 R308 R305 C314 100pF 0.1uF R304 C380 R309 .01uF -51.7dBm@450.125MHz C321 CR306 L304 -52.6dBm@526.925MHz 100pF 180nH C306 T301 XFMR C309 C308 100pF R306 R307 100pF 100K C312...
  • Page 411 UHF2 PCB and Schematic Diagrams 3-55 L331 R343 2.20uH Vdd_FILTERED Vdda C382 (SOURCE) 10uF DEMOD R350 C348 C347 C345 C344 C346 100K 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF C390 C329 100pF 0.1uF C343 0.22uF R344 R345 R355 2.628V 3.185V Q320 C342 C357 C384 C383...
  • Page 412 3-56 UHF2 PCB and Schematic Diagrams U210 C257 U211 TC7ST04FU 100pF C296 C265 TC7ST04FU 0.1uF C258 7.5V .01uF 1.65V U247 ADP3300 C259 SWB+ .01uF CR201 (SOURCE) C294 C293 C291 100pF 0.47uF 3 K3 A3 4 0.47uF L202 4V_3.3V 2 K2 A2 5 U248 2.2uH...
  • Page 413 UHF2 PCB and Schematic Diagrams 3-57 C281 R245 100pF R242 C250 L243 4.3pF C276 C285 C286 4.6V 2.2uF 100pF RESONATOR 0.1uF C246 100pF L281 L273 R241 390nH 18nH C242 4.3pF C272 C273 1.1pF 0.1uF C243 L271 L242 R244 4.3pF 27nH 22nH C245 RX_INJ...
  • Page 414 3-58 UHF2 PCB and Schematic Diagrams E101 BEAD R102 UNSWB+ L107 C114 C123 C108 33.47nH 100pF 10uF 100pF L105 390nH C172 UNSWB+ 0.1uF R106 C109 L106 100pF 7.66nH Microstrip Microstrip R172 L109 L108 C121 C160 L112 4.22nH 11.03nH 100pF 56pF 390nH Q110 Microstrip...
  • Page 415 C340 2180478Z20 1.0uF B503 3980502Z01 Backup Battery Contact, B+ C174 2113743N50 100pF C276 2104993J02 2.2uF C341 2180478Z20 1.0uF (not used in GP344) C188 2113743N39 36.0pF C277 2113743N50 100pF C342 2180478Z20 1.0uF B504 3980501Z01 Backup Battery Contact, B- C201 2113743N50 100pF...
  • Page 416 L304 2462587V37 180 nH R131 0662057N05 R320 0662057M74 U301 5109632D83 LVZIF L305 2462587V23 12 nH R132 0662057N33 270K R321 0662057M83 2.4K * Motorola Depot Servicing only L306 2479990B01 11.03nH R136 0662057N47 R322 0662057N30 200K ** For EX600 XLS models only...

This manual is also suitable for:

Gp688Gp-r compact seriesGp388Gp644

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