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Motorola A920 Service Manual

Gsm and wcdma 900/1800/1900/2100 mhz
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Level 1 and 2 Service Manual
A920, A925
Wireless Telephone
A920, A925
GSM and WCDMA 900/1800/1900/2100 MHz

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Summary of Contents for Motorola A920

  • Page 1 Level 1 and 2 Service Manual A920, A925 Wireless Telephone A920, A925 GSM and WCDMA 900/1800/1900/2100 MHz...

  • Page 3: Table Of Contents

    A920 Exploded View Parts List ........
  • Page 4 Contents A920, A925 October 27, 2003 6881042B40-A...

  • Page 5: Introduction

    Available on a contract basis, Motorola Inc. offers comprehensive maintenance and installation programs which enable customers to meet requirements for reliable, continuous communications. To learn more about the wide range of Motorola service programs, contact your local Motorola products representative or the nearest Customer Service Manager. Product Identification Motorola products are identified by the model number on a label usually located under the battery.

  • Page 6: Computer Program Copyrights

    The Motorola products described in this manual may include Motorola computer programs stored in semiconductor memories or other media that are copyrighted with all rights reserved worldwide to Motorola. Laws in the United States and other countries preserve for Motorola, Inc. certain exclusive rights to the copyrighted...

  • Page 7: Warranty Service Policy

    Customer’s original phones will be repaired but not refurbished as standard. Appointed Motorola Service Hubs will perform warranty and non-warranty field service for level 2 (assemblies) and level 3 (limited PCB component). Motorola High Tech Centers will perform level 4 (full component) repairs.

  • Page 8: Parts Replacement

    When ordering replacement parts or equipment, include the Motorola part number and description used in the service manual. When the Motorola part number of a component is not known, use the product model number or other related major assembly along with a description of the related major assembly and of the component in question.

  • Page 9: Specifications

    Level 1 and 2 Service Manual Specifications Specifications Table 1. Specifications General Function Specification Frequency Range EGSM TX: 880 - 915 MHz Frequency (MHz) = 890 + (0.2 × n) where: 0 ≤ n ≤ 124 Frequency (MHz) = 890 + (0.2 × (n – 1024)) where: 975 ≤ n ≤ 1023 RX: 925 –...
  • Page 10 Specifications A920, A925 Table 2. GSM System General Function Specification Speech Coding Type Regular Pulse excitation/linear predictive coding with long term prediction (RPE LPC with LTP) Bit Rate 13.0 kbps RF Power Output 32 dBm nominal GSM, 28.5 dBm nominal DCS/PCS...

  • Page 11: Product Overview

    Product Overview Product Overview The A920 and A925 are Motorola’s next evolution of a smart phone 3G device. This product provides high speed network access and rich multimedia content all in a superior voice centric unit. A video camera and GPS functionality provide additional value by offering unique business and entertainment solutions.
  • Page 12 Product Overview A920, A925 • Get to specific location, with appropriate choices of destinations and routes and guidance to destination • Identify local places of interest for hotels, taxi companies, restaurants, theatres, sightseeing, shopping • Receive information through alerts or display on map ahead of traffic congestion.

  • Page 13: Operation

    Speakerphone Earpiece Speaker A/B Gaming Buttons Volume Up/Down Color Display Voice Key Browser Application Button Headset End/Power on-off key Jack 5-Way Navigation Key Send/Phone App Key 020855-o Figure 1. A920 Controls (Front and Right Side View) 6881042B40-A October 27, 2003...
  • Page 14 Operation A920, A925 Stylus Rear Speaker Battery Cover Release 020859-0 Figure 2. Phone Controls (Rear View) Color Display The top section of the color display shows available applications. Figure 3 shows some of the indicators that you may see at the top of the display when using your phone.
  • Page 15 Level 1 and 2 Service Manual Operation 020850-o Figure 3. Home Screen Display Status Bar The status bar at the bottom of the telephone display shows the following status indicators: Battery Alert Location Message Strength Mode Clock Mode Keyboard Bluetooth Phone Network Signal...
  • Page 16 Operation A920, A925 ➧ Bluetooth functionality is not implemented in the initial release of this product. Bluetooth – Shows the current status of the Bluetooth radio system. The color indicates the Bluetooth status: Off: Gray On: White Connect: Green On means Bluetooth is enabled, but not connected to a Bluetooth-capable device.

  • Page 17: User Interface Structure

    User Interface Structure Menu Navigation The A920 and A925 telephones use a simplified icon and list-based user interface. Opening Applications The communicator has many built-in applications for communications, personal organization, and entertainment. Every application has an associated icon.

  • Page 18: Alert Settings

    Home screen. You don’t have to close applications — just open the next one. Changes or entries are always automatically saved. The application icons (see Table 5) open communicator applications: Table 5: A920 Application Icons Agenda Messaging Games...

  • Page 19: Battery Function

    Level 1 and 2 Service Manual Operation Battery Function Battery Charge Indicator The telephone displays a battery charge indicator icon in the home screen to indicate the battery charge level. The gauge shows four levels: 100%, 66%, 33%, and Low Battery.
  • Page 20 Operation A920, A925 October 27, 2003 6881042B40-A...

  • Page 21: Tools And Test Equipment

    Digital Multimeter Used to measure battery voltage 1. To order in North America, contact Motorola Aftermarket and Accessories Division (AAD) by phone at (800) 422-4210 or FAX (800) 622-6210; Internationally, call (847) 538-8023 or fax (847) 576-3023. 2. Not available from Motorola. To order, contact Hewlett Packard at (800) 452-4844.

  • Page 22: Disassembly

    Disassembly A920, A925 Disassembly This section describes how to disassemble a A920 or A925 telephone. Tools and equipment used are listed in Table 6, preceding. Many of the integrated devices used in this equipment are vulnerable to damage from electrostatic discharge (ESD). Ensure adequate static protection is in place when handling, shipping, and servicing the internal components of this equipment.

  • Page 23: Removing And Replacing The Battery

    (short circuit) and become quite hot. You must install and charge the battery to use the phone. Caution: The phone is designed to be used only with Motorola Original batteries and accessories. We recommend that you store batteries in their protective cases when not in use.
  • Page 24 Disassembly A920, A925 Insert the battery, printed arrow first, under the tab at the bottom of the battery compartment, then press the top of the battery into place. Replace the battery door (see page 16). October 27, 2003 6881024B40-A...

  • Page 25: Removing And Replacing The Usim

    Level 1 and 2 Service Manual Disassembly Removing and Replacing the USIM The UMTS Subscriber Identity Module (USIM) contains the phone number, service details, and phonebook/message memory. The phone can use GSM SIM cards, but not all features will be available. Do not bend or scratch the USIM card.

  • Page 26: Removing And Replacing The Front Housing

    Disassembly A920, A925 Removing and Replacing the Front Housing This product contains static-sensitive devices. Use anti-static handling procedures to prevent electrostatic discharge (ESD) and component damage. To Remove the Front Housing Ensure the phone is off. Remove the battery door (see page 16).
  • Page 27 Level 1 and 2 Service Manual Disassembly Insert a small slotted screwdriver carefully into one of the slots on the side of the phone (see Figure 7B). Release the snaps with a prying motion toward the center of the housing while lifting the front housing away from the phone.
  • Page 28 Disassembly A920, A925 To Replace the Front Housing Align the front housing to the rear housing. Attach the front housing snaps into place at the top end of the phone near the antenna (see Figure 8). Lower the front housing onto the rear housing. Press the 4 snaps into place along the sides of the front housing.

  • Page 29: Removing And Replacing The Plastic Chassis Housing

    Level 1 and 2 Service Manual Disassembly Removing and Replacing the Plastic Chassis Housing To Remove the Plastic Chassis Housing (PCH) Ensure the phone is off. Remove the battery door (see page 16). Remove the battery (see page 17). Remove the USIM (see page 19). Remove the front housing (see page 20).
  • Page 30 Disassembly A920, A925 10. Disconnect the Display Flex connector by gently prying upward with the disassembly tool. 11. Disconnect the PCH Flex connector by gently prying upward with the disassembly tool. FLEX DISASSEMBLY TOOL TRANSCEIVER BOARD 020823 020823-o Figure 10. Removing and Replacing the PCH Flex Connector To replace the PCH Attach both the PCH Flex and the Display Flex as shown in Figure 10.

  • Page 31: Removing And Replacing The Microphone Assembly

    Level 1 and 2 Service Manual Disassembly Removing and Replacing the Microphone Assembly To Remove the Microphone Assembly Ensure the phone is turned off. Remove the battery door (see page 16). Remove the battery (see page 17). Remove the USIM (see page 19). Remove the front housing (see page 20).

  • Page 32: Removing And Replacing The Transceiver Board

    Disassembly A920, A925 Removing and Replacing the Transceiver Board To remove the transceiver board Ensure the phone is turned off. Remove the battery door (see page 16). Remove the battery (see page 17). Remove the USIM (see page 19). Remove the Front Housing (see page 20).
  • Page 33 Level 1 and 2 Service Manual Disassembly To Replace the Transceiver Board Align the transceiver board with the rear housing and set it in place. If necessary, press gently to make sure the board is fully seated in the housing. Insert and tighten the two screws, using the T-6 Torx driver.

  • Page 34: Removing And Replacing The Camera

    Disassembly A920, A925 Removing and Replacing the Camera To Remove the Camera Ensure the phone is off. Remove the battery door (see page 16). Remove the battery (see page 17). Remove the USIM (see page 19). Remove the Front Housing (see page 20).

  • Page 35: Removing And Replacing The Display Assembly

    Level 1 and 2 Service Manual Disassembly Removing and Replacing the Display Assembly To remove the Display Assembly Follow the procedures to remove the: • Battery Door (page 16) • Battery (page 17) • USIM Card (page 19) • Front Housing (page 20) •...
  • Page 36 Disassembly A920, A925 DISPLAY ASSEMBLY PLASTIC CHASSIS HOUSING Figure 14. Removing the Display Assembly Remove the display assembly (including the attached circuit board away from the PCH. To Replace the Display Assembly Align the display assembly with the PCH. Insert the display assembly into the PCH. Ensure that the PCH tabs snap into place as you seat the display assembly in the PCH.

  • Page 37: Removing And Replacing The Secure Card/Multimedia Card (Sd/Mmc) Pcb

    Level 1 and 2 Service Manual Disassembly Removing and Replacing the Secure Card/Multimedia Card (SD/MMC) PCB (SD/MMC) PCB To Remove the Follow the procedures to remove the: • Battery door (page 16) • Battery (page 17) • USIM Card (page 19) •...

  • Page 38: Subscriber Identity Module (Sim) And Identification Label

    The MSN is an individual unit identity number and remains with the unit through- out its life. The MSN can be used to log and track a phone on Motorola's Service Center Database. The MSN is divided into the four sections shown in Figure 16.
  • Page 39 Level 1 and 2 Service Manual Subscriber Identity Module (SIM) and Identification Label International Mobile Equipment Identity (IMEI) The IMEI number is a number unique to the PCB and is stored within the phone's memory. The IMEI number is divided into the four sections shown in Figure 17. IMEI 16 Digits 6 Digits 2 Digits...

  • Page 40: Troubleshooting

    Troubleshooting A920, A925 Troubleshooting Table 7. Level 1 and 2 Troubleshooting Chart Symptom Probable Cause Verification and Remedy 1. Telephone will not turn on or stay on. a) Battery either discharged or Measure battery voltage across a 50 ohm (>1 defective.
  • Page 41 Level 1 and 2 Service Manual Troubleshooting Table 7. Level 1 and 2 Troubleshooting Chart (Continued) Symptom Probable Cause Verification and Remedy b) Earpiece speaker defective. Temporarily replace speaker with a known good speaker. Ensure good connection. Place a call and verify improvement in earpiece audio.

  • Page 42: Manual Test Mode

    A920, A925 Manual Test Mode Motorola A920 or A925 telephones are designed with a test mode. This allows service personnel to verify functionality and troubleshoot by entering commands. Launch the application by tapping the icon on the Application Launcher screen.
  • Page 43 Level 1 and 2 Service Manual Troubleshooting Figure 20. Handset Test Commands Application From Edit menu, select input format (Hex or Decimal) for test commands. Enter an Opcode and press Test. Enter Opcode parameters in the fields provided. You can also enter an Opcode and field values separated by commas, on the Opcode field (see Figure 21).

  • Page 44: Manual Test Mode Commands

    Troubleshooting A920, A925 Click the keyboard icon at the bottom of the screen to display a keyboard. Use the keyboard to enter the Opcode and field values. You can also use the stylus to enter opcodes and field values (see Figure 20).
  • Page 45 Level 1 and 2 Service Manual Troubleshooting Table 8. Level 2, 3G Handset Test Commands (Continued) Opcode Opcode Key Entry Descriptio (Decimal Field Field Value Mnemonic Format AUD_LPB Enable Field 1 0 = PCAP loopback *<Loopback audio Type> * loopback 6 = CODEC loopback <Action>OK 7 = VOCODER (speech) loopback...
  • Page 46 Troubleshooting A920, A925 Table 8. Level 2, 3G Handset Test Commands (Continued) Opcode Opcode Key Entry Descriptio (Decimal Field Field Value Mnemonic Format AUD_PATH 6 *<Input Change Field 1 0 = As is Path>*<Out audio path 1 = Mute input path Path>*<RX...

  • Page 47: Manual Test Mode Response Codes

    Level 1 and 2 Service Manual Troubleshooting Table 8. Level 2, 3G Handset Test Commands (Continued) Opcode Opcode Key Entry Descriptio (Decimal Field Field Value Mnemonic Format VERSION 57 *<version Retrieve Field 1 016000 = DSP version Type>OK SW version information 017000 = User (login) of process that created this file 017001 = Build time (universal) in ISO-8601 format...
  • Page 48 Troubleshooting A920, A925 Table 9. Level 2, 3G Handset Test Command Response Codes(Continued) Opcode Field Value (Decimal) CDMA: parse error (no data follows): command/parameter not supported for current sub-mode TDMA: command not supported in current Call Stack Test Mode Error: Length specified in command header greater than length received by transport layer Error: Irrecoverable error;...

  • Page 49: Level 2 Troubleshooting Procedures

    Level 1 and 2 Service Manual Troubleshooting Level 2 Troubleshooting Procedures A fully charged battery is all that is needed to perform the procedures described in this section. For each test, enter the Manual Test Command Mode as described in “Manual Test Mode”...

  • Page 50: Part Number Charts

    Part Number Charts This section provides a reference for the parts associated with A920 and A925 telephones. Related Publications Motorola A920 Wireless Phone User Guide, UK English SJJN4952 Motorola A920 Wireless Phone Reference Guide, English 68809454A45 A920 Exploded View Parts List Table 10.

  • Page 51: A925 Exploded View Parts List

    Level 1 and 2 Service Manual Part Number Charts A925 Exploded View Parts List Table 11. A925 Exploded View Parts List Motorola Motorola Description Description Part No. Part No. 1588021M04 Battery door assembly 840 mAh 8588540M05 Main antenna 0188493L01 Battery...

  • Page 52: Exploded View Diagram

    Part Number Charts A920, A925 Exploded View Diagram 020825-o Figure 23. Exploded View Diagram October 27, 2003 6881024B40-A...

  • Page 53: Accessories

    Level 1 and 2 Service Manual Part Number Charts Accessories Table 12. List of Accessories Description Part Number Free Charge U.S. Retail: 98418H-blue & 98419H-yellow Standard Battery (800 mAh) SNN5639 Standard Battery (800 mAh) PRC SNN5638 Desktop Charger (dual pocket) SPN5109 Desktop Charger (dual pocket) PRC SPN5110...
  • Page 54 1 and 2 A920, A925 6881042B40-A Level 1 and 2 Service Manual Index Index exploded view parts list 44, 45 Airplane mode status bar indicator 12 turning on and off 12 FCC rules 1 alert mode flashing and flexing 43...
  • Page 55 Index A920, A925 mechanical 32 service manual operation 9 about 2 alert settings 14 revisions 3 battery 15 scope 2 color display 10 service policy 3 controls, indicators, and I/O connectors 9 customer support 3 menu navigation 13 out of box failure 3...
  • Page 56 Level 1 and 2 Service Manual Index warranty service 3 6881042B40-A October 27, 2003 Index-3...
  • Page 57 Index A920, A925 Index-4 October 27, 2003 6881042B40-A...
  • Page 59 MOTOROLA, the Stylized M Logo, and all other trademarks indicated as such herein are trademarks of Motorola, Inc Truesync is a trademark of Starfish Software, Inc.. ® Reg. U.S. Pat. & Tm. Off.  2002 Motorola, Inc. All rights reserved.

This manual is also suitable for:

A925

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