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Motorola CM Series Service Information

Commercial series controlhead
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Commercial Series
CM Radios
Controlhead
Service Information
Issue: October 2004

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Summary of Contents for Motorola CM Series

  • Page 1 Commercial Series CM Radios Controlhead Service Information Issue: October 2004...
  • Page 2 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 3: Table Of Contents

    Table of Contents Chapter 1 MODEL OVERVIEW 1.0 CM140/CM340 Models ..................1-1 2.0 CM160/CM360 Models ..................1-1 Chapter 2 THEORY OF OPERATION 1.0 Introduction ......................2-1 2.0 Controlhead Model for CM140 and CM340 ............2-1 2.1 Power Supplies....................2-1 2.2 SPI Interface....................2-1 2.3 Keypad Keys ....................2-1 2.4 Status LEDs and Backlight Circuit ..............2-1 2.5 Microphone Connector Signals ..............2-1 2.6 Speaker ......................2-3...
  • Page 4 Chapter 4 CONTROLHEAD PCB/SCHEMATICS/PARTS LISTS 1.0 Allocation of Schematics and Circuit Boards ............4-1 2.0 Controlhead CM140/340 - PCB 8488998U01 Schematics ........4-3 2.1 Controlhead PCB 8488998U01 - Parts List............ 4-5 3.0 Controlhead CM160/360 - PCB 8489714U01 Schematics ......... 4-6 3.1 Controlhead PCB 8489714U01 - Parts List ...........

  • Page 5: Cm140/Cm340Models

    Chapter 1 OVERVIEW CM140/CM340Models The Controlhead contains the internal speaker, the on/off/volume knob, the microphone connector, several buttons to operate the radio, three indicator Light Emitting Diodes (LED) to inform the user about the radio status, and a single character 7-segment display for numeric information e.g. channel number.
  • Page 6 OVERVIEW...

  • Page 7: Theory Of Operation

    Chapter 2 THEORY OF OPERATION Introduction This Chapter provides a detailed theory of operation for the Controlhead circuits. For details of the trouble shooting refer to the related chapter in this section. Controlhead Model for CM140 and CM340 The controlhead contains the internal speaker, the on/off/volume knob, the microphone connector, several buttons to operate the radio and three indicator Light Emitting Diodes (LED) to inform the user about the radio status and a 7-segment display for numeric information.

  • Page 8: Keypad Keys

    THEORY OF OPERATION When the host radio needs to send date to the shift register, the radio asserts the shift register chip select and the data is loaded to the shift register. For example, the host radio sends data to change display channel or change LED status.

  • Page 9: Speaker

    Controlhead Model for CM140 and CM340 If the BOOT_RES (J802-7) line is connected to >5V (e.g. 9.3V) at turn-on, the uP will start in boot mode instead of normal operation. This mode is used to programme new firmware into the FLASH memory (U404 mainboard).

  • Page 10: Controlhead Model For Cm160 And Cm360

    THEORY OF OPERATION Controlhead Model for CM160 and CM360 The controlhead contains the internal speaker, the on/off/volume knob, the microphone connector, several buttons to operate the radio, three indicator Light Emitting Diodes (LED) to inform the user about the radio status, and an 8 character Liquid Crystal Display (LCD) for alpha - numerical information e.g.

  • Page 11: Keypad Keys

    Controlhead Model for CM160 and CM360 Keypad Keys The control head keypad is a four-key design. All keys are configured as two analog lines read by µP. The voltage on the analog lines varies between 0V and 3.3 V depending on which key is pressed.

  • Page 12: Speaker

    THEORY OF OPERATION The HOOK line (J102-6) is used to inform the uP which type of microphone or SCI lead is connected to the microphone socket. The voltage of the HOOK line is monitored by the uP (port PE0, MIC_SENSE) through a resistor divider on the main board. When the HOOK line is grounded (on hook condition) or floating (2.8V nominal), the uP sets the mux (U8) for keypad operation to allow the use of microphones with a keypad.

  • Page 13: Troubleshooting Charts

    Chapter 3 TROUBLESHOOTING CHARTS Controlhead CM140/CM340 Troubleshooting Chart Control Head Failure Control Head Check Check 9.3V on Back light R808, R809 OK ? Check Speaker Power-up Alert Tone Connection OK ? Power-up Check Red LED D801, Q806, U801 Flash? Channel Check Display DS801, U801, U802...

  • Page 14: Button/Tones Select Error (1 Of 2)

    TROUBLESHOOTING CHARTS Button/Tones Select Error (Page 1 of 2) Button/Tones Check Check Voltage Levels on TP401 (Keypad Col) and TP402 (Keypad Row) (see table on next page) Right Voltage Check R846, R811 Up Key on Control Head Right Voltage Check R845, R810 on Down Key on Control Head Right...
  • Page 15 Controlhead CM140/CM340 Troubleshooting Chart Button/Tones Select Error (Page 2 of 2) Right Does Q812 Voltage on Control Head Replace on DTMF keys operates well Q812 Button/Tones Keys Replace U803 Okay on Control Head Key_Col Key_Column Voltage TP401 Voltage (TP401) 0.008 V 0.675 V 1.346 V 1.997 V...
  • Page 16 TROUBLESHOOTING CHARTS Controlhead CM160/CM360 Troubleshooting Chart Control Head Failure Control Head Check Check 9.3V on Back light Q12, U1 and associated OK ? parts and U8 Power-up Check Speaker Alert Tone Connection OK ? Indicator Check LED’ Q8-Q10, U8 and 9.3V OK ? Display Check LCD...
  • Page 17 Controlhead CM160/CM360 Troubleshooting Chart Button/Tones Select Error (Page 1 of 2) Button/Tones Check Check Voltage Levels on TP401 (Keypad Col) and TP402 (Keypad Row) (see table on next page) Right Check R13, R45 Voltage on Control Head Up Key? Right Check R12, R49 Voltage on Control Head...
  • Page 18 TROUBLESHOOTING CHARTS Button/Tones Select Error (Page 2 of 2) Right Does Q41 Voltage on Control Head Replace on DTMF keys operates well Button/Tones Keys Replace U8 Okay on Control Head Key_Col Key_Column Voltage TP401 Voltage (TP401) 0.008 V 0.675 V 1.346 V 1.997 V 2.650 V...
  • Page 19 Chapter 4 CONTROLHEAD PCB / SCHEMATICS / PARTS LISTS Allocation of Schematics and Circuit Boards Table 4-1 Controlhead Diagrams and Parts Lists PCB : Controlhead CM140/CM340 Page 4-3 8488998U01 Main Board Top Side Page 4-3 8488998U01 Main Board Bottom Side SCHEMATICS Sheet 1 of 1 Page 4-4...
  • Page 20 CONTROLHEAD PCB / SCHEMATICS / PARTS LISTS THIS PAGE INTENTIONALLY LEFT BLANK...
  • Page 21 Controlhead CM140/CM340 - PCB 8488998U01 / Schematics Controlhead CM140/CM340 - PCB 8488998U01 / Schematics D801 D802 D803 J804 DS801 D806 J805 J802 S801 S802 Top Side SHOWN FROM SIDE 1 8488998u01_p3 Bottom Side Q811 Q804 Q806 Q805 R843 C827 J803 C826 R850 P801...
  • Page 22 Controlhead CM140/CM340 - PCB 8488998U01 / Schematics D3_3V R842 R847 C824 C825 M801 10.K 10.K 220.p 100n THESE ARE THE M802 ESD PROTECTION D3_3V M803 CONTACTS (SPRINGS) M804 9_3V C826 C827 R829 R843 DS801 9_3V D3_3V HDSP-513G R821 220.p 100n 10.K 10.K MAIN BOARD CONNECTOR...
  • Page 23 Controlhead CM140/CM340 - PCB 8488998U01 / Schematics Controlhead PCB 8488998U01 Parts Circuit Motorola Circuit Motorola Description Description List Part No Part No J803 0989241U02 FLEX 20-PIN 1mmTOP NON R830 0662057A41 CHIP RES 470 OHMS 5% Circuit Motorola M801 7588823L03 PAD GROUNFD LCD...
  • Page 24 Controlhead CM160/CM360 - PCB 8489714U01 / Schematics Controlhead CM160/CM360 - PCB 8489714U01 / Schematics Top Side C35 C36 J103 Bottom Side P101 Controlhead CM160/CM360 PCB 8489714U01...
  • Page 25 Controlhead CM160/CM360 - PCB 8489714U01 / Schematics D3_3V 9_3V COM3 LCD_36PIN COM2 COM1 COM0 5V_IN 9_3V D3_3V CH_PTT D3_3V 5V_IN 5V_CH TELCO_PTT 0.1uF 1000pF 0.1uF 470pF 0.1uF 1000pF 5V_CH 1000pF COM0 220pF 470pF 1000pF MAIN BOARD CONNECTOR COM1 S1D15100 COM2 .022uF J103-14 COM3...
  • Page 26 Controlhead CM160/CM360 - PCB 8489714U01 / Schematics Controlhead PCB 8489714U01 Parts Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description List Part No Part No Part No NOTPLACED CAP, 220pF J102 0908353Y02 CONN_J 0662057A81 RES, 22K Circuit Motorola NOTPLACED CAP, 220pF...

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Cm140Cm340Cm160Cm360

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