Motorola 6864115B62-C Detailed Service Manual
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Motorola 6864115B62-C Detailed Service Manual

Gm series professional radio
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Professional Radio
GM Series
Detailed Service Manual
6864115B62-C

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Summary of Contents for Motorola 6864115B62-C

  • Page 1 Professional Radio GM Series Detailed Service Manual 6864115B62-C...
  • Page 3 Professional Radio GM Series Detailed Service Manual 6864115B62-C Contents Section 1 Service Maintainability Section 2 Controlhead Service Information Section 3 Controller Service Information Section 4 VHF Service Information Section 5 UHF Service Information Section 6 Lowband Service Information WLS EMEA Publications Department, Jays Close, Viables Industrial Estate, Basingstoke, Hampshire, RG22 4PD, UK.
  • Page 5 Professional Radio GM Series 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: Table Of Contents

    Table of Contents Chapter 1 INTRODUCTION 1.0 Scope of Manual ....................1-1 2.0 Warranty and Service Support................1-1 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 EMEA Test Equipment Support..............1-2 2.6 Technical Support...................1-3 2.7 Related Documents ..................1-3...

  • Page 9: 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 10: European Radio Support Centre (Ersc)

    Online (Extranet). EMEA Test Equipment Support Information related to support and service of Motorola Test Equipment is available via Motorola Online (Extranet), through the Customer Care Organisation of Motorola’s local area representation or by calling the Motorola switchboard in Germany on telephone number: +49 6128 700.

  • Page 11: 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/East Europe - Siggy Punzenberger Telephone: +44 (0) 1256 488 082 Telephone: +49 (0) 6128 70 2342...

  • Page 12: Radio Model Information

    INTRODUCTION Radio Model Information The model number and serial number are located on a label attached to the back of your radio. You can determine the RF output power, frequency band, protocols, and physical packages. The example below shows one mobile radio model number and its specific characteristics. Table 1-1 Radio Model Number (Example: MDM25KHC9AN1AE) Type of Model...

  • Page 13: 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 14: Safe Handling Of Cmos And Ldmos

    European Union’s Restriction of Hazardous Substances (ROHS) Directive 2002/95/ EC and Waste Electrical and Electronic Equipment (WEEE) Directive 2002/96/EC. To maintain product compliance and reliability, use only the Motorola specified parts in this manual.. Any rework or repair on Environmentally Preferred Products must be done using the appropriate...
  • Page 15 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 16 MAINTENANCE 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 17: Notes For All Schematics And Circuit Boards

    1. Unless otherwise stated, resistances are in Ohms (k = 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 18 MAINTENANCE CH ACT Channel Activity Indicator Signal (Fast Squelch) CH KP ID Control Head Keypad ID (Data) Lines CH REQUEST Control Head Request from Control Head *P Clock Signal CNTLVLTG PA Power Control Voltage CNTR AUDIO Audio Lines of the Controller COL x Keypad Matrix Column x Chip Select Line PCIC / FRACN...
  • Page 19 Notes For All Schematics and Circuit Boards IN 5V RF REG Supply Voltage for 5V Regulator in RF Section INT KP COL Internal Keypad Matrix Column Signal INT KP ROW Internal Keypad Matrix Row Signal INT MIC Internal (from Control Head) Microphone Input INT SWB Internal Switched 13.2V Supply Voltage INT SWB+...
  • Page 20 MAINTENANCE RAM CS RAM Ship Select Service Request Line from Option Board REF CS Reference Chip Select (not used) RESET Reset Line ROW x Keypad Matrix Row x RSSI Received Signal Strength Indicator RX ADAPT Flat TX Path Disable during Transmitter Key-up RX AUD RTN Option Board Input / Output of Receiver Audio Path RX FLAT FILTERED AUDIO...
  • Page 21 Notes For All Schematics and Circuit Boards VS MIC Voice Storage Audio Signal into Microphone Path VS RAC Voice Storage Row Address Clock Signal Voltage Super Filtered (5V) VSTBY 5V Supply for *P when the Radio is switched off 4-LAYER CIRCUIT BOARD DETAIL VIEWING COPPER STEPS IN PROPER LAYER SEQUENCE SIDE 1 LAYER 1 (L1)
  • Page 22 2-10 MAINTENANCE...

  • Page 23: Chapter 3 Service Aids

    Table 3-1 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 24: Test Equipment

    SERVICE AIDS Test Equipment Table 3-2 lists test equipment required to service the radio and other two-way radios. Table 3-2 Recommended Test Equipment Motorola Part Description Characteristics Application Number R2600_NT Comms System Analyzer This monitor will Frequency/deviation (non MPT) substitute for items...
  • Page 25 Professional Radio GM Series Controlhead Service Information Issue: July 2007...
  • Page 26 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 27 Table of Contents Chapter 1 MODEL OVERVIEW 1.0 GM140/GM340/GM640 Models ................1-1 2.0 GM160/GM360/GM660 Models ................1-1 3.0 GM380/GM1280 Models..................1-2 Chapter 2 THEORY OF OPERATION 1.0 Introduction ......................2-1 2.0 Controlhead Model for GM140, GM340 and GM640 ...........2-1 2.1 Power Supplies....................2-1 2.2 Power On / Off....................2-1 2.3 Microprocessor Circuit..................2-1 2.4 SBEP Serial Interface..................2-2 2.5 Keypad Keys ....................2-2...
  • Page 28 Chapter 3 TROUBLESHOOTING CHARTS 1.0 Troubleshooting Chart for Controlhead GM140/340/640 ........3-1 1.1 On/Off ......................... 3-1 1.2 Microprocessor ....................3-2 2.0 Troubleshooting Chart for Controlhead GM160/360/660 ........3-3 2.1 On/Off ......................... 3-3 2.2 Microprocessor ....................3-4 2.3 Display ........................ 3-5 2.4 Backlight ......................

  • Page 29: Gm140/Gm340/Gm640 Models

    14 character Liquid Crystal Display (LCD) for alpha - numerical information e.g. channel number or call address name. To control the LED’s and the LCD, and to communicate with the host radio the control head uses the Motorola 68HC11E9 microprocessor...

  • Page 30: Gm380/Gm1280 Models

    Liquid Crystal Display (LCD) with 21 pre - defined symbols and a 32*96 dot matrix for graphical or alpha - numerical information e.g. channel number, select code, call address name. To control the LED’s and the LCD, and to communicate with the host radio the control head uses the Motorola 68HC11K4 microprocessor.

  • Page 31: Chapter 2 Theory Of Operation

    µP will switch the radio off. Microprocessor Circuit The controlhead uses the Motorola 68HC11E9 microprocessor (µP) (U0831) to control the LED’s and to communicate with the host radio. RAM and ROM are contained within the microprocessor itself.

  • Page 32: Sbep Serial Interface

    THEORY OF OPERATION The microprocessor’s RAM is always powered to maintain parameters such as the last operating mode. This is achieved by maintaining 5V at µP pin 25. Under normal conditions, when the radio is off, USW 5V is formed by FLT A+ running to D0822. C0822 allows the battery voltage to be disconnected for a couple of seconds without losing RAM parameters.

  • Page 33: Status Led And Back Light Circuit

    Controlhead Model for GM140, GM340 and GM640 An additional pair of analogue lines and A/D µP ports (PE 3 – 2) is available to support a keypad microphone, connected to the microphone connector J0811. Any microphone key press is processed the same way as a key press on the controlhead.

  • Page 34: Speaker

    14 character Liquid Crystal Display (LCD) for alpha - numerical information e.g. channel number or call address name. To control the LED’s and the LCD, and to communicate with the host radio the controlhead uses the Motorola 68HC11E9 microprocessor. Power Supplies The power supply to the controlhead is taken from the host radio’s FLT A+ voltage via connector...

  • Page 35: Microprocessor Circuit

    Controlhead Model for GM160, GM360 and GM660 Microprocessor Circuit The controlhead uses the Motorola 68HC11E9 microprocessor (µP) (U0831) to control the LED’s and the LCD and to communicate with the host radio. RAM and ROM are contained within the microprocessor itself.

  • Page 36: Keypad Keys

    THEORY OF OPERATION Keypad Keys The controlhead keypad is a 6-key kepad (Model B) or a 10- key keypad (model C). All keys are configured as 2 analogue lines read by µP pins 13 and 15. The voltage on the analogue lines varies between 0 volts and +5 volts depending on which key has been pressed.

  • Page 37: Microphone Connector Signals

    Controlhead Model for GM160, GM360 and GM660 includes the RAM start address for the following display data. With input A0 set to logic „1" the µP then writes the display data to the display RAM. When data transfer is complete the µP terminates the chip select, RD and WD activities.

  • Page 38: Speaker

    - numerical information e.g. channel number, select code, call address name. To control the LED’s and the LCD, and to communicate with the host radio the controlhead uses the Motorola 68HC11K4 microprocessor. Power Supplies The power supply to the controlhead is taken from the host radio’s FLT A+ voltage via connector J0801 pin 3.

  • Page 39: Power On / Off

    5 SOURCE and transistor Q0866 and the controlhead’s microprocessor starts execution. Microprocessor Circuit The controlheadcontrolhead uses the Motorola 68HC11K4 microprocessor (uP) (U0871) to control the LED’s and the LCD and to communicate with the host radio. RAM and ROM are contained within the microprocessor itself.

  • Page 40: Keypad Keys

    2-10 THEORY OF OPERATION reads serial data via pin 78. Whenever the microprocessor detects activity on the BUS+ line, it starts communication. When the host radio needs to communicate to the controlhead µP, it sends data via line BUS+. Any transition on this line generates an interrupt and the µP starts communication.

  • Page 41: Liquid Crystal Display (Lcd)

    Controlhead Model for GM380, and GM1280 2-11 causes the output of the op-amp to rise and to reduce the base to emitter voltage of Q0943. This decreases the current of Q0941 until the loop has settled. The back light for the LCD module uses a similar circuitry. The only differences are that µP port PH2 controls the back light brightness and that the LED’s are located on the LCD module which is connected via J0821.

  • Page 42: Speaker

    2-12 THEORY OF OPERATION informs the µP about the pressed PTT button. The µP will inform the host radio about any status change on the PTT IRDEC line via SBEP bus. When line PTT IRDEC is connected to FLT A+ level, transistor Q0851 is switched on through diode VR0851 and thereby pulls the level on line ON OFF CONTROL to FLT A+ level.

  • Page 43: Chapter 3 Troubleshooting Charts

    Chapter 3 TROUBLESHOOTING CHARTS Controlhead GM140/340/640 Troubleshooting Chart On/Off Radio can not be switched on via ON/OFF Volume Knob Check / Replace R0823 Pin TAB R0822 / VR0822 / = 5V ? D0822 / C0822 Press and hold On/Off Volume Knob R0823 Pin TAB1 Check / Replace when pressed...

  • Page 44: Microprocessor

    TROUBLESHOOTING CHARTS Microprocessor Power Up Alert Tone is OK but volume knob does not operate and no indicator is on EXTAL Check / Replace U0831 Pin 31 R0831 / U0833 / U0831 = 8.00 MHz ? RESET Check / Replace TP0833 C0833 / R0832 / U0831 = HIGH ?

  • Page 45: On/Off

    Controlhead GM160/360/660 Troubleshooting Flow Chart Controlhead GM160/360/660 Troubleshooting Flow Chart On/Off Radio can not be switched on via ON/OFF Volume Knob Check / Replace R0823 Pin TAB R0822 / VR0822 / = 5V ? D0822 / C0822 Press and hold On/Off Volume Knob R0823 Pin TAB1 Check / Replace...

  • Page 46: Microprocessor

    TROUBLESHOOTING CHARTS Microprocessor Power Up Alert Tone is OK but volume knob does not operate and no indicator is on EXTAL Check / Replace U0831 Pin 31 R0831 / U0833 / U0831 = 8.00 MHz ? RESET Check / Replace TP0833 C0833 / R0832 / U0831 = HIGH ?

  • Page 47: Display

    Controlhead GM160/360/660 Troubleshooting Flow Chart Display Power Up Alert Tone is OK, volume knob does operate, indicator/backlight is on but nothing on display V5 (against 5V) TP0973 between Check LCD Assembly -6V and -7V ? Activity on Check for shortage Address &...

  • Page 48: Backlight

    TROUBLESHOOTING CHARTS Backlight ) Power Up Alert Tone is OK, volume knob does operate, indicator/display is on but no backlight U0831 Pin 58 Check for shortage is toggling ? U0831 Base of Check / Replace Q0934 R0847 / C0843 / R0943 >...

  • Page 49: On/Off

    Controlhead GM380/1280 Troubleshooting Flow Chart Controlhead GM380/1280 Troubleshooting Flow Chart On/Off Radio can not be switched on via ON/OFF Volume Knob R0854 Check / Replace Pin TAB R0855 / VR0855 / D0855 = 5V? C0856 Press and hold On / Off Volume Knob R0854 Pin TAB1...

  • Page 50: Microprocessor

    TROUBLESHOOTING CHARTS Microprocessor Power Up Alert Tone is audible on external speaker but volume knob does not operate and no indicators are on TP0876 =5V ? U0871 TP0866 Pin 73 EXTAL = 8 MHz = 0V Check / Replace Check / Replace R0866 / C0866 / R0873 / U0873 / Q0866 / R0863...
  • Page 51 Controlhead GM380/1280 Troubleshooting Flow Chart Microprocessor Measure with scope while rotating Volume Pot Data Signal Check on J0801 Radio Controller Pin 5 BUS+ Data Signal Check / Replace on TP0877 R0888 / R0889 SCI_RX Data Signal Check / Replace on TP0878 U0871 SCI_TX Check / Replace...

  • Page 52: Display

    3-10 TROUBLESHOOTING CHARTS Display Power Up Alert Tone is audible, volume knob does operate, indicator/backlight is on but nothing is seen on the display. TP0973 Voltage Sense Check / Replace between LCD Module 2V and 2.4V Activity on Address & Data lines Check for shortage A0 / D0...D7 / CS1 U0871...

  • Page 53: Keypad Backlight

    Controlhead GM380/1280 Troubleshooting Flow Chart 3-11 Keypad Backlight Power Up Alert Tone is audible, volume knob does operate, display is on but no keypad backlight. Check for shortage U0871 Pin 25 U0871 is toggling ? Check / Replace Base of Q0943 R0945 / C0943 / R0947 >...

  • Page 54: Display Backlight

    3-12 TROUBLESHOOTING CHARTS Display Backlight Power Up Alert Tone is audible, volume knob does operate, display is on but no display backlight. Check for shortage U0871 Pin 24 U0871 is toggling ? Check / Replace Base of Q0963 R0965 / C0963 / R0967 >...

  • Page 55: Allocation Of Schematics And Circuit Boards

    Chapter 4 CONTROLHEAD PCB / SCHEMATICS / PARTS LISTS Allocation of Schematics and Circuit Boards Table 4-1 Controlhead Diagrams and Parts Lists PCB : Controlhead GM140/340/640 8486146B07/8471236L01 Page 4-3 Main Board Top Side 8486146B07/8471236L01 Page 4-3 Main Board Bottom Side SCHEMATICS Sheet 1 of 2 Page 4-4...
  • Page 56 controlhead PCB / Schematics / Parts lists Table 4-3 Controlhead Diagrams and Parts Lists PCB : Controlhead GM380/1280 8486178B03/04/8471237L01 Page 4-15 Main Board Top Side 8486178B03/04/8471237L01 Page 4-15 Main Board Bottom Side SCHEMATICS Sheet 1 of 4 Page 4-16 Sheet 2 of 4 Page 4-17 Sheet 3 of 4 Page 4-18...

  • Page 57: Controlhead Gm140/340/640 - Pcb 8486146B07/8471236Z01 / Schematics

    Controlhead GM140/340/640 - PCB 8486146B07/8471236L01 / Schematics Controlhead GM140/340/640 - PCB 8486146B07/8471236L01 / Schematics D0877 D0878 D0879 D0873 D0872 S0865 S0866 R0823 D0886 D0884 JU0853 JU0852 JU0854 D0874 D0871 D0875 D0876 S0864 S0861 J0811 S0862 S0863 D0887 D0881 D0888 D0885 ZWG0130114-A Top Side ZWG0130114-A...
  • Page 58 Controlhead GM140/340/640 - PCB 8486146B07/8471236L01 / Schematics J0801 CONTROL HEAD CONNECTOR VR0823 C0811 VR0811 C0810 C0843 C0813 R0811 470pF 5.6V 470pF 470pF 470pF J0801-14 R0810 J0801-13 EXT_KP_COL J0811-10 EXT_KP_COL R0812 J0801-12 SCI_TX WARIS FLT_A+ J0811-1 FLT_A+ C0809 GM300 R0847 J0801-11 P0801-1 82pF J0811-2...
  • Page 59 Controlhead GM140/340/640 - PCB 8486146B07/8471236L01 / Schematics FLT_A+ D0885 INT_KP_COL D0886 green green R0867 R0866 D0884 D0888 green R0861 green D0887 D0881 green green INT_KP_ROW 1 P1 1 P1 S0861 S0865 Q0881 Q0885 5 P5 5 P5 KEYPAD 4 P4 R0862 8 P8 8 P8...

  • Page 60: Controlhead Pcb 8486146B07 Parts List

    TANT CP 2.2uF 10% 10V R0815 0662057A76 13k 1/16W 5% C0823 2113741F49 10nF 50V R0816 0662057A90 51k 1/16W 5% * Motorola Depot Servicing only C0824 2113741F49 10nF 50V R0821 0662057A73 10k 1/16W 5% C0831 2311049A42 TANT CP 3.3uF 10% 6V...

  • Page 61: Controlhead Pcb 8471236Z01 - Parts List

    2313960B54 CAP 3.3UF R0821 0613952J01 RES 10K OHM C0832 2113945C31 CAP 0.1UF R0822 0613952J04 RES 13K OHM * Motorola Depot Servicing only C0833 2113945C31 CAP 0.1UF R0823 1866500A01 POTENTIOMETER C0843 2113945L17 CAP 470PF Reference designators with an asterisk indicate R0824...

  • Page 62: Controlhead Gm160/360/660 - Pcb 8486155B06/8415672H03 / Schematics

    D0983 S0903 S0908 S0901 S0905 S0907 D0950 D0954 D0951 D0938 D0980 D0984 D0981 D0968 ZWG0130136-A Top Side ZWG0130136-A ZWG0130137-B Bottom Side MOTOROLA 8486155B06-0 Q0878 Q0879 R0855 R0857 R0879 R0877 R0851 R0878 R0856 R0850 C0832 R0852 TP0831 R0853 U0833 C0823 R0822...
  • Page 63 Controlhead GM160/360/660 - PCB 8486155B06/8415672H03 / Schematics WARIS GM300 J0801 CONTROLHEAD J0801-14 CONNECTOR J0801-13 J0811 MICROPHONE J0801-12 SCI_TX CONNECTOR VR0811 J0801-11 P0801-1 C0808 82pF VR0812 J0801-10 P0801-2 R0811 Shown from Front Side 5.6V C0810 C0811 C0812 C0813 470pF J0801-9 470pF 470pF 470pF R0810...
  • Page 64 4-10 Controlhead GM160/360/660 - PCB 8486155B06/8415672H03 / Schematics KEYPAD B SW0902 SW0910 SW0906 ROW1 1 P1 1 P1 1 P1 5 P5 5 P5 5 P5 SW0903 SW0908 SW0905 4 P4 4 P4 4 P4 8 P8 8 P8 8 P8 2 P2 2 P2 2 P2...
  • Page 65 Controlhead GM160/360/660 - PCB 8486155B06/8415672H03 / Schematics 4-11 BACKLIGHT GREEN BACKLIGHT RED Q0931 Q0933 FLT_A+ FLT_A+ D0965 D0969 D0973 D0977 D0981 D0985 D0931 D0935 D0939 D0943 D0947 D0951 D0955 D0961 R0931 R0941 D0970 D0974 D0978 D0982 D0986 D0932 D0936 D0940 D0944 D0948 D0952...
  • Page 66 4-12 Controlhead GM160/360/660 - PCB 8486155B06/8415672H03 / Schematics THE LCD IS PART OF HARDWAREKITS GLN7358A (EUR) AND GLN7359A (US) H0971 04B01 SED1526F0A U0971 RESET CH_KP_ID(0:7) C0972 C0971 R0973 TP0973 C0984 C0985 1.2MEG .01uF 2.2uF LED_CNTRL(0:8) R0975 200K R0977 R0972 200K TP0974 C0983 VOLTAGE_SENSE...

  • Page 67: Controlhead Pcb 8486155B06 Parts List

    47k 1/16W 5% C0823 2113741F49 10nF 50V D0987 4886171B04 LED GREEN R0860 0662057A97 100k 1/16W * Motorola Depot Servicing only C0831 2311049A42 TANT CP 3.3uF 10% 6V D0988 4886171B04 LED GREEN R0861 0662057A97 100k 1/16W Reference designators with an asterisk indicate...

  • Page 68: Controlhead Pcb 8415672H03 Parts List

    RES 47K OHM C0803 2113945L17 CAP 470PF D0979 4886171B04 LED GREEN WM R0855 0613952J17 RES 47K OHM * Motorola Depot Servicing only C0804 2113945L17 CAP 470PF D0980 4886171B04 LED GREEN WM R0856 0613952J17 RES 47K OHM Reference designators with an asterisk indicate...
  • Page 69 Controlhead GM380/1280 - PCB 8486178B03/B04/8471237L01 / Schematics 4-15 Controlhead GM380/1280 - PCB 8486178B03/B04/8471237L01 / Schematics D0993 D0992 D0991 S0903 S0904 S0905 R0854 S0908 S0909 S0910 S0913 S0914 S0915 S0918 S0919 S0920 S0901 S0911 S0921 S0916 S0906 J0811 S0923 S0924 S0925 S0902 S0922 S0912...
  • Page 70 4-16 Controlhead GM380/1280 - PCB 8486178B03/B04/8471237L01 / Schematics U0873 CSTCC8.00MG BOOT_PWR Q0851 TP0871 FLT_A+ R0871 R0873 C0873 FLT_A+ C0871 4.7K 1MEG VR0851 3.3uF 0.1uF 5.6V BOOT_GND PTT_IRDEC TP0872 C0851 D0871 .01uF R0872 BOOT_MODE BL_LCD_RED TP0876 TP0873 BL_KP_RED BL_LCD_GREEN BL_KP_GREEN LCD_E_RD Q0852 D0852 LCD_RW_WR...
  • Page 71 Controlhead GM380/1280 - PCB 8486178B03/B04/8471237L01 / Schematics 4-17 KEYPAD D INT_KP_COL SW0901 SW0906 SW0911 SW0916 SW0921 R0901 R0902 R0903 R0904 R0905 130K SW0902 SW0907 SW0917 SW0922 SW0912 S0902 S0903 S0904 S0905 S0901 SWITCH SWITCH SWITCH SWITCH SWITCH 0V/0V 1V/0V 2V/0V 3V/0V 4V/0V R0911...
  • Page 72 4-18 Controlhead GM380/1280 - PCB 8486178B03/B04/8471237L01 / Schematics Q0961 Q0941 FLT_A+ FLT_A+ BL_A_GREEN D0941 D0943 D0945 D0947 D0949 D0951 R0941 R0961 BL_K_GREEN D0953 D0955 D0957 D0959 D0961 D0963 R0943 R0963 3.3K 3.3K D0965 D0967 D0969 D0971 D0973 D0975 R0945 R0947 Q0943 Q0963 R0967...
  • Page 73 Controlhead GM380/1280 - PCB 8486178B03/B04/8471237L01 / Schematics 4-19 WARIS GM300 J0811 C0810 C0811 C0812 C0813 MICROPHONE 470pF 470pF 470pF 470pF CONNECTOR Shown from Front Side R0811 VR0811 VR0812 5.6V R0812 ANALOG_INPUT_2 J0811-10 EXT_KP_COL R0813 FLT_A+ J0811-1 FLT_A+ R0814 5V J0811-2 HOOK J0811-3 HOOK R0815...

  • Page 74: Controlhead Pcb 8486178B03/04 - Parts List

    33k 1/16W 5% C0999 2311049A40 TANT CP 2.2uF 10% 10V Q0993 4813824A10 NPN 40V .2A B=50-150 R0890 0662057A35 270 1/16W 5% * Motorola Depot Servicing only D0852 4813833C02 DUAL SOT MMBD6100 R0811 0662057A90 51k 1/16W 5% R0901 0662057A90 51k 1/16W 5%...

  • Page 75: Controlhead Pcb 8471237L01 Parts List

    Controlhead GM380/1280 - PCB 8486178B03/B04/8471237L01 / Schematics 4-21 Controlhead PCB 8471237L01 Parts Circuit Motorola Circuit Motorola Circuit Motorola List Description Description Description Part No Part No Part No D0950 4886171B01 LED RED WM J0821 0986197B02 CONN ZIF HOR 24 R0870...
  • Page 76 VR0851 4813977M11 DIODE MBZ5232 VR0855 4813977M11 DIODE MBZ5232 * Motorola Depot Servicing onlyReference designators with an asterisk indicate components which are not fieldreplaceable because they need to be calibrated with specialized factory equipment after installation. Radios in which these parts have been replaced in the field will be off frequency at temperature extremes.
  • Page 77 Professional Radio GM Series Controller Service Information Issue: May 2007...
  • Page 78 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 79 Table of Contents Chapter 1 THEORY OF OPERATION 1.0 Controller Circuits ....................1-1 1.1 Overview......................1-1 1.2 General......................1-1 1.3 Radio Power Distribution ................1-2 1.4 Electronic ON/OFF ..................1-3 1.5 Emergency .....................1-4 1.6 Mechanical ON/OFF..................1-4 1.7 Ignition ......................1-5 1.8 Microprocessor Clock Synthesizer ..............1-5 1.9 Serial Peripheral Interface (SPI)..............1-5 1.10 SBEP Serial Interface..................1-6 1.11 General Purpose Input/Output................1-6 1.12 Normal Microprocessor Operation..............1-7...
  • Page 80 Chapter 3 CONTROLLER SCHEMATICS 1.0 Allocation of Schematics and Circuit Boards ............3-1 2.0 T2 Controller ....................... 3-3 2.1 T2 Controller Parts List ..................3-8 3.0 T5 Controller ..................... 3-10 3.1 T5 Controller Parts List ..................3-16 4.0 T6/7 Controller ....................3-18 4.1 T6/7 Controller Parts List ...................

  • Page 81: Theory Of Operation

    MUX ICs, the On/Off circuit, and general purpose Input/Output circuitry. The controller uses the Motorola 68HC11FL0 microprocessor (U0101). In addition to the microprocessor, the controller has 3 external memory devices. The 3 memory devices consist of a 32Kbyte SRAM (U0122), a 512Kbyte FLASH EEPROM (U0121), and a 16Kbyte EEPROM (U0111).

  • Page 82: Radio Power Distribution

    THEORY OF OPERATION External To Synthesizer Microphone Internal Microphone 16.8 MHz Reference Clock Audio/Signalling from Synthesizer Architecture External Speaker Recovered Audio Audio ASFIC_CMP Internal from Synthesizer Speaker Section (5V_RF) µP Clock To RF Section SCI to Accessory & Controlhead Digital Connector Architecture HC11FL0...

  • Page 83: Electronic On/Off

    Controller Circuits The voltage VSTBY, which is derived directly from the supply voltage by components R0621 and VR0621, is used to buffer the internal RAM. C0622 allows the battery voltage to be disconnected for a couple of seconds without losing RAM parameters. Dual diode D0621 prevents radio circuitry from discharging this capacitor.

  • Page 84: Emergency

    THEORY OF OPERATION from emitter to collector of the pnp transistor. When the radio is turned on the voltage at the base of the npn transistor is pulled high and the pnp transistor switches on (saturation). With voltage INT SWB+ now at supply voltage level, transistor Q0641 pulls pin 2 of the voltage regulators U0611 and U 0641 to ground level and thereby enables their outputs.

  • Page 85: Ignition

    Controller Circuits Ignition Ignition sense is used to prevent the radio from draining the vehicle’s battery because the engine is not running. When the IGNITION input (J0501 pin 10) goes above 5 volts Q0661 is turned on via line IGNITION CONTROL.

  • Page 86: Sbep Serial Interface

    THEORY OF OPERATION send serial from a µP to a device, and SPI RECEIVE DATA is used to send data from a device to a µP. On the controller there are two ICs on the SPI BUS, ASFIC CMP (U0221-22), and EEPROM (U0111- 5).

  • Page 87: Normal Microprocessor Operation

    Controller Circuits DIG IN 1 can be used as external PTT input, DATA PTT input or others, set by the CPS. The µP reads this port via pin 77 and Q0171. DIG OUT 2 can be used as normal output or external alarm output, set by the CPS. Transistor Q0173 is controlled by the µP via ASFIC CMP pin 14.

  • Page 88: Flash Electronically Erasable Programmable Memory

    THEORY OF OPERATION On the µP the lines XIRQ (U0101-48), MODA LIR (U0101-58), MODB VSTPY (U0101-57) and RESET (U0101-94) should be high at all times during normal operation. Whenever a data or address line becomes open or shorted to an adjacent line, a common symptom is that the RESET line goes low periodically, with the period being in the order of 20msecs.

  • Page 89: Electrically Erasable Programmable Memory (Eeprom)

    Controller Board Audio and Signalling Circuits 1.14 Electrically Erasable Programmable Memory (EEPROM) The external 16 Kbyte EEPROM (U0111) contains additional radio operating parameters such as operating frequency and signalling features, commonly know as the codeplug. It is also used to store radio operating state parameters such as current mode and volume.

  • Page 90: Transmit Audio Circuits

    1-10 THEORY OF OPERATION Transmit Audio Circuits Refer to Figure 3-1 for reference for the following sections. J0451 J0551 FLAT 31 IN/OUT TX RTN OPTION BOARD EXPANSION BOARD J0401 TX SND TX RTN TP0221 CONTROL HEAD FILTERS AND CONNECTOR PREEMPHASIS ASFIC_CMP J0501 U0221...
  • Page 91 Controller Board Audio and Signalling Circuits 1-11 C0254 serves as a DC blocking capacitor. Multi switch U0251 controlled by ASFIC CMP port GCB4 selects either the external microphone input signal or the voice storage playback signal for entering the ASFIC CMP at pin 48. The audio signal at U0221-48 (TP0222) should be approximately 14mV for 1.5kHz or 3kHz of deviation with 12.5kHz or 25kHz channel spacing.

  • Page 92: Transmit Signalling Circuits

    1-12 THEORY OF OPERATION 2.2.3 TX Secure Audio (optional) The audio follows the normal transmit audio processing until it emerges from the ASFIC CMP TX SND pin (U0221-44), which is fed to the Secure board residing at option connector J0551-33. The Secure board contains circuitry to amplify, encrypt, and filter the audio.
  • Page 93 Controller Board Audio and Signalling Circuits 1-13 2.3.1 Sub-audible Data (PL/DPL) Sub-audible data implies signalling whose bandwidth is below 300Hz. PL and DPL waveforms are used for conventional operation and connect tones for trunked voice channel operation. The trunking connect tone is simply a PL tone at a higher deviation level than PL in a conventional system. Although it is referred to as "sub-audible data,"...

  • Page 94: Receive Audio Circuits

    1-14 THEORY OF OPERATION Receive Audio Circuits Refer to Figure5-5 for reference for the following sections. ACCESSORY CONNECTOR FLT/FLAT RX AUDIO J0501 AUDIO SPKR + EXTERNAL SPKR - U0271 SPEAKER SPKR+ SPKR- CONTROLHEAD CONNECTOR INTERNAL SPEAKER J0401 HANDSET AUDIO AUDIO URX OUT U IO VOLUME...
  • Page 95 Controller Board Audio and Signalling Circuits 1-15 2.4.2 Audio Processing and Digital Volume Control The receiver audio signal enters the controller section from the IF IC on DISC AUDIO. The signal is DC coupled by R0228 and enters the ASFIC CMP via the DISC pin U0221-2. Inside the ASFIC CMP, the signal goes through 2 paths in parallel, the audio path and the PL/DPL path.
  • Page 96 1-16 THEORY OF OPERATION 2.4.4 Handset Audio Certain hand held accessories have a speaker within them which require a different voltage level than that provided by U0271. For those devices HANDSET AUDIO is available at controlhead connector J0401-7. The received audio from the output of the ASFIC CMP’s digital volume attenuator and buffered by U0211-1 is also routed to U0211-3 pin 9 where it is amplified 20 dB;...

  • Page 97: Receive Signalling Circuits

    Controller Board Audio and Signalling Circuits 1-17 RECEIVE SIGNALLING CIRCUITS Refer to Figure 5-6 for reference for the following sections. DATA FILTER HSIO LIMITER AND DEEMPHASIS MICRO CONTROLLER DISC DET AUDIO ASFIC_CMP U0101 DISCRIMINATOR AUDIO U0221 FROM RF SECTION LSIO (IF IC) FILTER LIMITER...

  • Page 98: Voice Storage

    1-18 THEORY OF OPERATION Voice Storage (optional) The Voice Storage (VS) option can be used to store audio signals coming from the receiver or from the microphone. Any stored audio signal can be played back over the radio’s speaker or sent out via the radio’s transmitter.

  • Page 99: Troubleshooting Charts

    Chapter 2 TROUBLESHOOTING CHARTS Controller Troubleshooting Chart Controller Check Press PTT. No RF Output Before replacing Power. Power Up Not able to MCU, check SPI Alert Tone program Audio AUDIO J0501 clock, SPI data, RF Board ICs at Audio PA Audio at Pin and RF IC select (U0271)
  • Page 100 TROUBLESHOOTING CHARTS...
  • Page 101 Chapter 3 CONTROLLER SCHEMATICS / PARTS LIST Allocation of Schematics and Circuit Boards Controller Circuits This Chapter shows the Schematics and the the Parts Lists for the Controller circuits. Voice Storage Facility The Voice Storage is fitted on all MPT radios GM640/660/1280 and on GM380 as standard. The schematics, component layout and parts list for these circuits are shown in this chapter.

  • Page 102: Controller T6/T7

    Controller schematics / parts list Table 3-3 Controller T6/T7 Diagrams and Parts Lists Controller T6/T7 used on PCB : T6 on 8486206B06 LB1, 25-60W T6 on 8486207B05 LB2, 25-60W T6 on 8486140B12 VHF, 25-45W T6 on 8480643z06 UHF B1, 25-40W T7 on 8486172B07 VHF, 1-25W T7 on 8485670z02 UHF B1, 1-25W SCHEMATICS...
  • Page 103 Allocation of Schematics and Circuit Boards Table 3-5 Controller T11 Diagrams and Parts Lists Controller T11 used on PCB : 8486206B08 LB1, 25-60W 8486207B07 LB2, 25-60W 8485908Z04 LB3, 25-60W SCHEMATICS Controller Overall Page 3-35 Supply Voltage Page 3-36 Audio Page 3-37 Page 3-38 Microprocessor Page 3-39...
  • Page 104 Controller schematics / parts list...
  • Page 105 Controller T2 / Schematic Diagrams Controller T2 / Schematic Diagrams OPT_PTT OPT_PTT BUS+ BUS+ RESET RESET CNTRL_AUDIO(0:7) CNTRL_AUDIO(0:7) GPIO(0:13) GPIO(0:13) SPI(0:10) SPI(0:10) IN_5V_RF_REG VS_MIC FLT_A+ PASUPVLTG INT_SWB+ EXT_SWB+ EXP_BD_REQ BOOT_CNTRL 5V_RF SCI_TX EMERGENCY_CONTROL RESET IGNITION_CONTROL FLT_A+ UART_TX ON_OFF_CONTROL SUPPLY_VOLTAGE FLT_A+ CH_ACT RX_ADAPT TEMPSENSE...
  • Page 106 Controller T2 / Schematic Diagrams J0601-1 PASUPVLTG J0601-2 VR0601 J0601-3 U0611 C0601 470pF LM2941 VOUT EXT_SWB+ 2 ON_OFF C0603 R0611 C0611 C0612 GND1 GND2 22uF 10uF 0.1uF R0612 4.7K E0631 57R01 FLT_A+ D0621 R0621 5VDC VSTBY C0621 C0622 470pF 47uF VR0621 5.6V U0641...
  • Page 107 Controller T2 / Schematic Diagrams R0201 U0211-4 C0211 R0211 MC3403 MC3403 0.1uF 7.5K R0202 R0204 4.6VDC C0201 C0212 R0212 10uF TP0221 10uF 7.5K 80mV RMS R0205 C0204 INT_MIC R0207 0.1uF C0203 VS_MIC 2.2K 80mV RMS 2200pF R0206 EXT_MIC R0208 C0205 2.2K 2200pF MODIN...
  • Page 108 Controller T2 / Schematic Diagrams J0451 EXPANSION BOARD J0401 18-PIN CONNECTOR CONTROL HEAD R0401 12-PIN CONNECTOR UART_RX J0451-1 UART_RX J0401-1 SCI_TX J0451-2 UART_TX SCI_TX UART_TX J0401-2 SPKR+ J0451-3 SPEAKER+ SPEAKER- J0401-3 SPKR- J0451-4 GROUND J0401-4 GROUND OPT_PTT J0451-5 OPT_PTT EXP_BD_PTT J0401-5 EXP_BD_PTT J0451-6...
  • Page 109 Controller T2 / Schematic Diagrams R0101 R0102 TP0151 5VDC (0VDC during boot mode) R0151 4.7K D0151 FLT_A+ FLT_A+ BUS+ BOOT_CNTRL VSTBY Q0151 D0101 VR0151 R0115 R0152 R0116 5.6V GPIO(0:13) ON_OFF_CONTROL R0172 R0171 SCI_TX C0151 .01uF 4.7K TP0101 TP0102 GP1_IN GP1_IN_ACC3 CNTLR_AUDIO(0:7) CNTLR_AUDIO(0:7) CNTLR_AUDIO(0:7)
  • Page 110 Controller T2 / Schematic Diagrams Controller T2 Parts List Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Part No. Part No. Part No. C0267 2113741F49 .01uF C0490 2113743L09 470pF C0645 2113743E20 0.1uF Circuit Motorola Description Part No. C0271 2113741F49 .01uF...
  • Page 111 XTAL R0152 0662057A82 R0262 0662057A97 100K R0643 0660076E51 1.2K R0170 0662057A73 R0265 0662057A82 R0651 0662057A01 * Motorola Depot Servicing only R0171 0662057A65 4.7K R0267 0662057A89 R0652 0662057A01 Reference designators with an asterisk indicate R0172 0662057A73 R0268 0662057A73 R0661 0662057A49 components which are not fieldreplaceable...
  • Page 112 3-10 Controller T5 / Schematic Diagrams Controller T5 / Schematic Diagrams OPT_PTT OPT_PTT BUS+ BUS+ RESET RESET CNTRL_AUDIO(0:7) CNTRL_AUDIO(0:7) GPIO(0:13) GPIO(0:13) SPI(0:10) SPI(0:10) IN_5V_RF_REG VS_MIC FLT_A+ PASUPVLTG INT_SWB+ EXT_SWB+ EXP_BD_REQ BOOT_CNTRL 5V_RF SPI(0:10) CNTLR_AUDIO(0:7) SCI_TX EMERGENCY_CONTROL ZWG013003510-O RESET IGNITION_CONTROL CONTROLLER FLT_A+ CH_ACT ON_OFF_CONTROL...
  • Page 113 Controller T5 / Schematic Diagrams 3-11 J0601-1 PASUPVLTG J0601-2 J0601-3 VR0601 U0611 C0601 470pF LM2941 4 VIN VOUT EXT_SWB+ ON_OFF C0603 C0612 R0611 C0611 10uF 0.1uF 22uF GND2 GND1 R0612 4.7K E0631 57R01 FLT_A+ D0621 R0621 5VDC VSTBY VR0621 C0621 C0622 5.6V 470pF...
  • Page 114 3-12 Controller T5 / Schematic Diagrams U0211-4 R0201 MC3403 R0211 C0211 R0203 7.5K 0.1uF R0202 R0204 C0201 C0202 10uF 10uF R0212 C0212 TP0221 7.5K 10uF 80mV RMS R0205 C0204 INT_MIC 0.1uF C0203 R0207 VS_MIC 2.2K 2200pF 80mV RMS R0206 EXT_MIC C0205 R0208 5V_RF...
  • Page 115 Controller T5 / Schematic Diagrams 3-13 R0441 J0451 C0449 C0448 C0447 C0446 C0445 C0443 C0442 C0441 C0427 C0423 C0421 EXPANSION BOARD 470pF 470pF 470pF 470pF 470pF 470pF 470pF 470pF 470pF 82pF 470pF 18-PIN CONNECTOR J0401 CONTROL HEAD C0426 C0422 J0451-1 R0401 12-PIN CONNECTOR 470pF...
  • Page 116 3-14 Controller T5 / Schematic Diagrams R0101 R0102 4.7K BUS+ 5VDC (0VDC during boot mode) TP0151 R0151 D0101 D0151 FLT_A+ FLT_A+ R0116 R0115 BOOT_CNTRL VSTBY Q0151 VR0151 R0152 SCI_TX 5.6V ON_OFF_CONTROL C0151 TP0101 TP0102 .01uF GPIO(0:13) R0172 10K R0171 CNTLR_AUDIO(0:7) CNTLR_AUDIO(0:7) CNTLR_AUDIO(0:7) CNTLR_AUDIO(0:7)
  • Page 117 Controller T5 / Schematic Diagrams 3-15 U0351 LP2951ACMM-3.3 INPUT OUTPUT 7 FEEDBACK ERROR 3 SHUTDOWN SENSE C0351 C0353 C0354 C0352 VTAP 0.1uF 0.1uF .022uF 33uF C0342 0.1uF C0324 0.1uF R0323 U0331-2 C0325 D0301 RX_AUD_RTN U0341-1 C0331 PWR_GND 0.1uF 0.1uF LM2904 R0324 C0303 C0301...
  • Page 118 3-16 Controller T5 / Schematic Diagrams Controller T5 Parts List Motorola Part Motorola Part Motorola Part Circuit Ref Description Circuit Ref Description Circuit Ref Description C0302 2113743E20 100nF 16V C0478 2113743L09 470 PF 10% C0652 2311049A97 TANT CHIP 33 UF 16...
  • Page 119 0662057A73 10k 1/16W 5% Used in GM1280 only R0182 0662057A89 47k 1/16W 5% R0671 0662057A84 30k 1/16W 5% * Motorola Depot Servicing only R0342 0662057A55 1k8 1/16W 5% R0183 0662057A65 4k7 1/16W 5% R0672 0662057A73 10k 1/16W 5% Used in...
  • Page 120 3-18 Controller T6/7 / Schematic Diagrams Controller T6/7 / Schematic Diagrams one for LDMOS PA CHASSIS and one for BIPOLAR PA CHASSIS OPT_PTT OPT_PTT BUS+ BUS+ RESET RESET CNTRL_AUDIO(0:7) CNTRL_AUDIO(0:7) GPIO(0:13) GPIO(0:13) SPI(0:10) SPI(0:10) IN_5V_RF_REG VS_MIC FLT_A+ PASUPVLTG INT_SWB+ EXT_SWB+ EXP_BD_REQ BOOT_CNTRL 5V_RF...
  • Page 121 Controller T6/7 / Schematic Diagrams 3-19 J0601-1 PASUPVLTG J0601-2 J0601-3 C0601 VR0601 U0611 470pF LM2941 VOUT EXT_SWB+ 2 ON_OFF ADJ 1 C0603 R0611 GND2 10uF GND1 C0611 C0612 22uF 0.1uF R0612 4.7K E0631 57R01 FLT_A+ D0621 R0621 5VDC VSTBY C0621 VR0621 C0622 5.6V...
  • Page 122 3-20 Controller T6/7 / Schematic Diagrams C0256 R0211 C0211 R0201 R0203 0.1uF 7.5K R0202 R0204 100pF R0256 5V_RF 100K C0201 C0202 R0212 C0212 10uF 10uF 7.5K 10uF TP0221 R0254 80mV RMS R0205 C0204 INT_MIC FLAT_TX_RTN R0207 0.1uF C0203 U0211-4 VS_MIC 2.2K 2200pF R0255...
  • Page 123 Controller T6/7 / Schematic Diagrams 3-21 R0441 J0451 C0459 C0458 C0457 C0456 C0455 C0453 C0452 C0451 C0449 C0448 C0447 C0446 C0445 C0443 C0442 C0441 C0421 EXPANSION BOARD 470pF 470pF 470pF 470pF 470pF 470pF 470pF 470pF 470pF 470pF 470pF 470pF 470pF 470pF 470pF 470pF...
  • Page 124 3-22 Controller T6/7 / Schematic Diagrams R0441 J0451 C0421 EXPANSION BOARD C0443 C0449 C0448 C0447 C0446 C0445 C0442 C0441 82pF 18-PIN CONNECTOR 470pF J0401 470pF 470pF 470pF 470pF 470pF 470pF 470pF R0442 1K CONTROL HEAD C0427 C0426 C0423 C0422 R0401 DIG_IN_6 WITH WAKEUP J0451-1 GP6_IN_ACC10...
  • Page 125 Controller T6/7 / Schematic Diagrams 3-23 R0101 R0102 4.7K BUS+ 5VDC (0VDC during boot mode) TP0151 R0151 D0101 D0151 FLT_A+ FLT_A+ R0116 R0115 BOOT_CNTRL Q0151 VSTBY VR0151 SCI_TX R0152 5.6V ON_OFF_CONTROL C0151 TP0101 TP0102 .01uF GPIO(0:13) R0172 R0171 4.7K CNTLR_AUDIO(0:7) CNTLR_AUDIO(0:7) CNTLR_AUDIO(0:7) Q0171...
  • Page 126 3-24 Controller T6/7 / Schematic Diagrams U0351 LP2951ACMM-3.3 OUTPUT 1 INPUT ERROR 5 FEEDBACK SHUTDOWN SENSE C0351 VTAP 0.1uF C0352 C0353 C0354 0.1uF .022uF 33uF C0342 0.1uF C0324 U0331-2 0.1uF R0323 C0325 D0301 RX_AUD_RTN C0331 U0341-1 PWR_GND 0.1uF NU 0.1uF R0324 LM2904 C0301...
  • Page 127 Controller T6/7 / Schematic Diagrams 3-25 Controller T6/7 Parts List Motorola Part Motorola Part Motorola Part Circuit Ref Description Circuit Ref Description Circuit Ref Description C0293 2311049C01 10uF (only LowBand) C0477 2113743L09 470 PF 10% C0601 2113741F17 470pF 50V Motorola Part...
  • Page 128 R0642 0660076E70 FILM 7500 R0335 0662057B02 150k 1/16W R0184 0662057A89 47k 1/16W 5% R0643 0660076E51 FILM 1200 * Motorola Depot Servicing only Used in GM1280 only R0185 0662057A65 4k7 1/16W 5% R0651 0662057A01 10 1/16W 5% R0341 0662057A73 10k 1/16W...
  • Page 129 Controller T9 / Schematic Diagrams 3-27 Controller T9 / Schematic Diagrams one for LDMOS PA CHASSIS and one for BIPOLAR PA CHASSIS OPT_PTT OPT_PTT BUS+ BUS+ RESET RESET CNTRL_AUDIO(0:7) CNTRL_AUDIO(0:7) GPIO(0:13) GPIO(0:13) SPI(0:10) SPI(0:10) IN_5V_RF_REG VS_MIC FLT_A+ PASUPVLTG INT_SWB+ EXT_SWB+ EXP_BD_REQ BOOT_CNTRL 5V_RF...
  • Page 130 3-28 Controller T9 / Schematic Diagrams J0601-1 PASUPVLTG J0601-2 J0601-3 C0601 VR0601 U0611 470pF LM2941 VOUT EXT_SWB+ 2 ON_OFF ADJ 1 C0603 R0611 GND2 10uF GND1 C0611 C0612 22uF 0.1uF R0612 4.7K E0631 57R01 FLT_A+ D0621 R0621 5VDC VSTBY VR0621 C0621 C0622 470pF...
  • Page 131 Controller T9 / Schematic Diagrams 3-29 C0256 R0211 C0211 R0203 R0201 0.1uF 7.5K 100pF R0202 R0204 R0256 5V_RF 100K C0201 C0202 R0212 C0212 10uF 10uF 7.5K 10uF TP0221 R0254 80mV RMS R0205 C0204 INT_MIC FLAT_TX_RTN R0207 C0203 0.1uF U0211-4 VS_MIC 2200pF 2.2K R0255...
  • Page 132 3-30 Controller T9 / Schematic Diagrams R0441 J0451 C0421 EXPANSION BOARD C0443 C0449 C0448 C0447 C0446 C0445 C0442 C0441 82pF 18-PIN CONNECTOR 470pF J0401 470pF 470pF 470pF 470pF 470pF 470pF 470pF R0442 1K CONTROL HEAD C0427 C0426 C0423 C0422 DIG_IN_6 WITH WAKEUP J0451-1 GP6_IN_ACC10 R0401...
  • Page 133 Controller T9 / Schematic Diagrams 3-31 R0101 R0102 4.7K BUS+ 5VDC (0VDC during boot mode) TP0151 R0151 D0101 D0151 FLT_A+ FLT_A+ R0116 R0115 BOOT_CNTRL VSTBY Q0151 VR0151 SCI_TX R0152 5.6V ON_OFF_CONTROL C0151 .01uF TP0101 TP0102 GPIO(0:13) R0172 R0171 4.7K CNTLR_AUDIO(0:7) CNTLR_AUDIO(0:7) CNTLR_AUDIO(0:7) Q0171...
  • Page 134 3-32 Controller T9 / Schematic Diagrams U0351 LP2951ACMM-3.3 OUTPUT 1 INPUT ERROR 5 FEEDBACK SHUTDOWN SENSE C0351 VTAP 0.1uF C0352 C0353 C0354 0.1uF .022uF 33uF C0342 0.1uF C0324 U0331-2 0.1uF R0323 C0325 D0301 RX_AUD_RTN C0331 U0341-1 PWR_GND 0.1uF NU 0.1uF R0324 LM2904 C0301...
  • Page 135 Controller T9 / Schematic Diagrams 3-33 Controller T9 Parts List Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Part No Part No Part No C0293 2311049C01 10uF (only LowBand) C0477 2113743L09 470 PF 10% C0655 2113743E20 100nF 16V Circuit...
  • Page 136 0662057A01 10 1/16W 5% R0341 0662057A73 10k 1/16W R0182 0662057A89 47k 1/16W 5% R0661 0662057A49 1k 1/16W 5% * Motorola Depot Servicing only Used in GM1280 only R0183 0662057A65 4k7 1/16W 5% R0662 0662057B02 150k 1/16W R0342 0662057A55 1k8 1/16W...
  • Page 137 Controller T9 / Schematic Diagrams 3-35 Controller T9 Parts List (8471224L01) Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Part No. Part No. Part No. Circuit Motorola Description C0302 2113945C31 CAP 0.1 UF C0474 2113945A05 CAP 470 PF C0641...
  • Page 138 RES 47K Ohm R0341 0613952J01 RES 10K Ohm R0642 0613958D85 RES 7500 Ohm R0185 0613952H89 RES 4700 Ohm * Motorola Depot Servicing only Used in GM1280 only R0643 0613958D09 RES 1200 Ohm R0186 0613952J17 RES 47K Ohm R0342 0613952H79 RES 1800 Ohm...
  • Page 139 Controller T11 / Schematic Diagrams 3-37 Controller T11 / Schematic Diagrams OPT_PTT OPT_PTT BUS+ BUS+ RESET RESET CNTRL_AUDIO(0:7) CNTRL_AUDIO(0:7) GPIO(0:13) GPIO(0:13) SPI(0:10) SPI(0:10) IN_5V_RF_REG VS_MIC FLT_A+ PASUPVLTG INT_SWB+ EXT_SWB+ EXP_BD_REQ BOOT_CNTRL 5V_RF SCI_TX EMERGENCY_CONTROL RESET IGNITION_CONTROL FLT_A+ CONTROLLER CH_ACT ON_OFF_CONTROL P1 0102726B33 SUPPLY_VOLTAGE FLT_A+...
  • Page 140 3-38 Controller T11 / Schematic Diagrams J0601-1 PASUPVLTG J0601-2 J0601-3 U0611 VR0601 C0601 LM2941 470pF VOUT EXT_SWB+ ON_OFF R0611 C0611 C0612 GND1 C0603 GND2 22uF 0.1uF 10uF R0612 4.7K E0631 57R01 FLT_A+ D0621 R0621 VSTBY C0621 C0622 VR0621 470pF 47uF 5.6V U0641 LM2941...
  • Page 141 Controller T11 / Schematic Diagrams 3-39 C0256 R0201 R0203 R0211 C0211 7.5K 0.1uF 100pF R0202 R0204 R0256 C0201 C0202 10uF 10uF 100K 5V_RF C0212 R0212 TP0221 7.5K 10uF R0254 R0205 C0204 INT_MIC FLAT_TX_RTN 0.1uF R0207 C0203 VS_MIC U0211-4 2200pF 2.2K MC3403 R0255 R0206...
  • Page 142 3-40 Controller T11 / Schematic Diagrams C0448 C0447 C0446 C0445 C0443 C0442 C0441 470pF 470pF C0426 C0422 470pF 470pF 470pF 470pF 470pF J0451 C0449 R0441 470pF 470pF C0427 C0421 EXPANSION BOARD 470pF J0401 R0442 470pF 18-PIN CONNECTOR 82pF CONTROL HEAD C0423 R0401 12-PIN CONNECTOR...
  • Page 143 Controller T11 / Schematic Diagrams 3-41 R0102 R0101 4.7K BUS+ TP0151 R0151 D0101 D0151 FLT_A+ FLT_A+ R0116 R0115 BOOT_CNTRL VSTBY Q0151 VR0151 SCI_TX 5.6V R0152 ON_OFF_CONTROL GPIO(0:13) R0172 C0151 TP0101 TP0102 .01uF R0171 CNTLR_AUDIO(0:7) CNTLR_AUDIO(0:7) Q0171 CNTLR_AUDIO(0:7) CNTLR_AUDIO(0:7) 4.7K GP1_IN GP1_IN_ACC3 TP0104 R0173...
  • Page 144 3-42 Controller T11 / Schematic Diagrams Controller T11 Parts List Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Part No Part No Part No C0277 2113741F25 CAP, 1000pF C0503 2113741F17 CAP, 470pF F0401 6580542Z01 FUSE Circuit Motorola Description C0290...
  • Page 145 R0223 0662057A84 RES, 30K R0541 0662057A83 RES, 27K R0224 0662057A71 RES, 8.2K R0543 0662057A97 RES, 100K * Motorola Depot Servicing only R0228 0662057B47 RES, 0 R0555 0662057A25 RES, 100 Reference designators with an asterisk indicate R0229 0662057A01 RES, 10 R0556...
  • Page 146 3-44 Controller T12 / Schematic Diagrams Controller T12 / Schematic Diagrams OPT_PTT OPT_PTT BUS+ BUS+ RESET RESET CNTRL_AUDIO(0:7) CNTRL_AUDIO(0:7) GPIO(0:13) GPIO(0:13) SPI(0:10) SPI(0:10) IN_5V_RF_REG VS_MIC FLT_A+ PASUPVLTG INT_SWB+ EXT_SWB+ EXP_BD_REQ BOOT_CNTRL 5V_RF SCI_TX EMERGENCY_CONTROL RESET IGNITION_CONTROL CONTROLLER FLT_A+ CH_ACT ON_OFF_CONTROL P1 0102726B33 SUPPLY_VOLTAGE FLT_A+...
  • Page 147 Controller T12 / Schematic Diagrams 3-45 J0601-1 PASUPVLTG J0601-2 J0601-3 U0611 VR0601 C0601 LM2941 470pF VOUT EXT_SWB+ ON_OFF R0611 C0611 C0612 GND1 C0603 GND2 22uF 0.1uF 10uF R0612 4.7K E0631 57R01 FLT_A+ D0621 R0621 VSTBY C0621 C0622 VR0621 470pF 47uF 5.6V U0641 LM2941...
  • Page 148 3-46 Controller T12 / Schematic Diagrams C0256 R0211 C0211 R0201 R0203 0.1uF 7.5K 100pF R0202 R0204 R0256 C0202 C0201 100K 10uF 10uF 5V_RF R0212 C0212 TP0221 7.5K 10uF 80mV RMS R0254 R0205 C0204 INT_MIC FLAT_TX_RTN 0.1uF C0203 R0207 VS_MIC 2.2K U0211-4 2200pF MC3403...
  • Page 149 Controller T12 / Schematic Diagrams 3-47 J0451 R0441 C0449 EXPANSION BOARD 470pF J0401 C0421 C0448 C0447 C0446 C0445 C0443 C0442 C0441 R0442 18-PIN CONNECTOR CONTROL HEAD 82pF 470pF 470pF 470pF 470pF 470pF 470pF 470pF C0427 C0426 C0423 C0422 R0401 12-PIN CONNECTOR 470pF 470pF 470pF...
  • Page 150 3-48 Controller T12 / Schematic Diagrams R0102 R0101 4.7K BUS+ TP0151 R0151 D0101 D0151 FLT_A+ FLT_A+ R0116 R0115 BOOT_CNTRL VSTBY VR0151 Q0151 SCI_TX 5.6V R0152 ON_OFF_CONTROL GPIO(0:13) R0172 TP0101 TP0102 C0151 .01uF R0171 CNTLR_AUDIO(0:7) CNTLR_AUDIO(0:7) Q0171 CNTLR_AUDIO(0:7) CNTLR_AUDIO(0:7) 4.7K GP1_IN GP1_IN_ACC3 TP0104 R0173...
  • Page 151 Controller T12 / Schematic Diagrams 3-49 U0351 LP2951ACMM-3.3 OUTPUT 1 INPUT ERROR 5 FEEDBACK SHUTDOWN SENSE C0351 VTAP 0.1uF C0352 C0353 C0354 0.1uF .022uF 33uF C0342 0.1uF C0324 U0331-2 0.1uF R0323 C0325 D0301 RX_AUD_RTN C0331 U0341-1 PWR_GND 0.1uF NU R0324 0.1uF LM2904 C0301...
  • Page 152 3-50 Controller T12 / Schematic Diagrams Controller T12 Parts List Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Part No Part No Part No C0293 2311049C01 10uF (only LowBand) C0477 2113743L09 470 PF 10% C0655 2113743E20 100nF 16V Circuit...
  • Page 153 R0661 0662057A49 1k 1/16W 5% Used in GM1280 only R0185 0662057A65 4k7 1/16W 5% R0662 0662057B02 150k 1/16W * Motorola Depot Servicing only R0343 0662057B47 0 1/16W R0186 0662057A89 47k 1/16W 5% R0671 0662057A84 30k 1/16W 5% Used in GM1280 only...
  • Page 154 3-52 Controller T12 / Schematic Diagrams...
  • Page 155 Professional Radio GM Series VHF (136-174MHz) Service Information Issue: May 2007...
  • Page 156 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 157 Table of Contents Chapter 1 MODEL CHART AND TECHNICAL SPECIFICATIONS 1.0 GM140/GM160 Model Chart................1-1 2.0 GM340/GM360/GM380 Model Chart ..............1-2 3.0 GM640/GM660/GM1280 Model Chart ..............1-2 4.0 Technical Specifications ..................1-4 Chapter 2 THEORY OF OPERATION 1.0 Introduction ......................2-1 2.0 VHF (136-174MHz) Receiver................2-1 2.1 Receiver Front-End ..................2-1 2.2 Front-End Band-Pass Filters &...
  • Page 158 Chapter 3 TROUBLESHOOTING CHARTS 1.0 Troubleshooting Flow Chart for Receiver (Sheet 1 of 2) ........3-1 1.1 Troubleshooting Flow Chart for Receiver (Sheet 2 of 2) ........3-2 2.0 Troubleshooting Flow Chart for 25W Transmitter (Sheet 1 of 3) ......3-3 2.1 Troubleshooting Flow Chart for 25W Transmitter (Sheet 2 of 3) ......

  • Page 159: Chapter 1 Model Chart And Technical Specifications

    Chapter 1 MODEL CHART AND TECHNICAL SPECIFICATIONS GM140/GM160 Model Chart GM Series VHF 136-174 MHz Model Description MDM25KKC9AA1_E GM140, 136-174 MHz, 25-40W, 4 Ch MDM25KKF9AA5_E GM160, 136-174 MHz, 25-40W, 128 Ch MDM25KHC9AA1_E GM140, 136-174 MHz, 1-25W, 4 Ch MDM25KHF9AA5_E GM160, 136-174 MHz, 1-25W, 128 Ch Item Description GCN6112_...

  • Page 160: Gm340/Gm360/Gm380 Model Chart

    MODEL CHART AND TECHNICAL SPECIFICATIONS GM340/GM360/GM380 Model Chart GM Series VHF 136-174 MHz Model Description MDM25KHC9AN1_E GM340, 136-174 MHz, 1-25W, 6 Ch MDM25KHF9AN5_E GM360, 136-174 MHz, 1-25W, 255 Ch MDM25KHC9AN8_E GM380, 136-174 MHz, 1-25W, 255 Ch MDM25KHA9AN0_E Databox, 136-174 MHz, 1-25W, 16 Ch Item Description GCN6112_...

  • Page 161: Gm640/Gm660/Gm1280 Model Chart

    GM640/GM660/GM1280 Model Chart GM640/GM660/GM1280 Model Chart GM Series VHF 136-174 MHz Model Description MDM25KHC9CK1_E GM640, 136-174 MHz, 1-25W, 6 Ch MDM25KHF9CK5_E GM660, 136-174 MHz, 1-25W, 255 Ch MDM25KHN9CK8_E GM1280, 136-174 MHz, 1-25W, 255 Ch MDM25KHA9CK7_E Databox, 136-174 MHz, 1-25W, 16 Ch Item Description GCN6112_...

  • Page 162: Technical Specifications

    MODEL CHART AND TECHNICAL SPECIFICATIONS Technical Specifications Data is specified for +25°C unless otherwise stated. General Specifications Channel Capacity GM140 GM160 GM340 GM360 GM380 GM640 GM660 GM1280 Databox Power Supply 13.2Vdc (10.8 - 15.6Vdc) Dimensions: H x W x D (mm) Depth excluding knobs GM140/340/640 56mm x 176mm x 177mm (1 - 25W) 56mm x 176mm x 189mm (25 - 45W)
  • Page 163 Technical Specifications Transmitter 136-174 *Frequencies - Full Bandsplit Channel Spacing 12.5/20/25 kHz Frequency Stability ±2.5 ppm (-30°C to +60°C, +25° Ref.) Power 1-25W / 25-45W ±2.5 @ 12.5 kHz Modulation Limiting ±4.0 @ 20 kHz ±5.0 @ 25 kHz -40 dB @ 12.5kHz FM Hum &...
  • Page 164 MODEL CHART AND TECHNICAL SPECIFICATIONS...

  • Page 165: Chapter 2 Theory Of Operation

    Chapter 2 THEORY OF OPERATION Introduction This Chapter provides a detailed theory of operation for the VHF circuits in the radio. For details of the theory of operation and trouble shooting for the the associated Controller circuits refer to the Controller Section of this manual.

  • Page 166: Front-End Band-Pass Filters & Pre-Amplifier

    THEORY OF OPERATION There are two 2-pole 44.85 MHz crystal filters in the high-IF section and 2 pairs of 455 kHz ceramic filters in the low-IF section to provide the required adjacent channel selectivity. The correct pair of ceramic filters for 12.5 or 25kHz channel spacing is selected via control line BWSELECT. The second IF at 455 kHz is mixed, amplified and demodulated in the IF IC.

  • Page 167: Low Intermediate Frequency (If) And Receiver Back End

    VHF (136-174MHz) Transmitter Power Amplifier (PA) 25 W Low Intermediate Frequency (IF) and Receiver Back End The 44.85 MHz high-IF signal from the second IF amplifier feeds the IF IC (U3101) at pin1. Within the IF IC, the 44.85 MHz high IF signal mixes with the 44.395 MHz second local oscillator (2nd LO) to produce the low-IF signal at 455 kHz.

  • Page 168: First Power Controlled Stage

    THEORY OF OPERATION First Power Controlled Stage The first stage (U3401) is a 20dB gain integrated circuit containing two LDMOS FET amplifier stages. It amplifies the RF signal from the VCO (TXINJ). The output power of stage U3401 is controlled by a DC voltage applied to pin 1 from the op-amp U3402-1, pin 1. The control voltage simultaneously varies the bias of two FET stages within U3401.

  • Page 169: Directional Coupler

    VHF (136-174MHz) Transmitter Power Amplifier (PA) 25 W Directional Coupler The directional coupler is a microstrip printed circuit, which couples a small amount of the forward power delivered by Q3441. The coupled signal is rectified by D3451. The DC voltage is proportional to the RF output power and feeds the RFIN port of the PCIC (U3501 pin 1).

  • Page 170: Vhf (136-174Mhz) Frequency Synthesis

    THEORY OF OPERATION VHF (136-174MHz) Frequency Synthesis The frequency synthesizer subsystem consists of the reference oscillator (Y3261 or Y3263), the Low Voltage Fractional-N synthesizer (LVFRAC-N, U3201), and the voltage-controlled oscillators and buffer amplifiers (U3301, Q3301-2 and associated circuitry). Reference Oscillator The reference oscillator (Y3263) contains a temperature compensated crystal oscillator with a frequency of 16.8 MHz.

  • Page 171: Voltage Controlled Oscillator (Vco)

    VHF (136-174MHz) Frequency Synthesis A voltage of 5V applied to the super filter input (U3201 pin 30) supplies an output voltage of 4.5 VDC (VSF) at pin 28. It supplies the VCO, VCO modulation bias circuit (via R3363) and the synthesizer charge pump resistor network (R3251, R3252).

  • Page 172: Synthesizer Operation

    THEORY OF OPERATION The VCOBIC together with the Fractional-N synthesizer (U3201) generates the required frequencies in both the transmit and receive modes. The TRB line (U3301 pin 19) determines which tank circuits and internal buffers are to be enabled. A high level on TRB enables the TX tank and TX output (pin 10), and a low enables the RX tank and RX output (pin 8).

  • Page 173: Vhf (136-174Mhz) Transmitter Power Amplifier (Pa) 45 W

    VHF (136-174MHz) Transmitter Power Amplifier (PA) 45 W In order to modulate the PLL, the two spot modulation method is utilized. Via U3201 pin 10 (MODIN), the audio signal is applied to both the A/D converter (low frequency path) as well as the balance attenuator (high frequency path).

  • Page 174: Pre-Driver Stage

    2-10 THEORY OF OPERATION In receive mode the voltage control line is at ground level and turns off Q3501-2, which in turn switches off the biasing voltage to U3401. Pre-Driver Stage The next stage is an LDMOS device (Q3421) providing a gain of 13 dB. This device requires a positive gate bias and a quiescent current flow for proper operation.

  • Page 175: Antenna Switch

    VHF (136-174MHz) Transmitter Power Amplifier (PA) 45 W 2-11 Antenna Switch The antenna switch consists of two PIN diodes, D3471 and D3472. In the receive mode, both diodes are off. Signals applied at the antenna jack J3401 are routed, via the harmonic filter, through network L3472, C3474 and C3475, to the receiver input.
  • Page 176 2-12 THEORY OF OPERATION...

  • Page 177: Chapter 3 Troubleshooting Charts

    Chapter 3 TROUBLESHOOTING CHARTS Troubleshooting Flow Chart for Receiver (Sheet 1 of 2) START Bad SINAD Bad 20dB Quieting No Recovered Audio Check Controller Audio at (in the case of no audio) pin 8 of OR ELSE go to “B” U3101 ? Spray or inject 44.85MHz into XTAL Filter FL3101...

  • Page 178: Troubleshooting Flow Chart For Receiver (Sheet 2 Of 2)

    TROUBLESHOOTING CHARTS Troubleshooting Flow Chart for Receiver (Sheet 2 of 2) Inject RF into J3401 Trace IF signal from C3035 to Q3101. IF Signal at Check for bad XTAL IF signal at Q3102 C3035? filter collector? Before replacing U3101, check U3101 voltages RF Signal at LO level OK?

  • Page 179: Troubleshooting Flow Chart For 25W Transmitter (Sheet 1 Of 3)

    Troubleshooting Flow Chart for 25W Transmitter (Sheet 1 of 3) Troubleshooting Flow Chart for 25W Transmitter (Sheet 1 of 3) START No or too low Power when keyed Check if Pressure Pad closes S3440 Check Components between Current Q3441 and RF Output, >500mA &...

  • Page 180: Troubleshooting Flow Chart For 25W Transmitter (Sheet 2 Of 3)

    TROUBLESHOOTING CHARTS Troubleshooting Flow Chart for 25W Transmitter (Sheet 2 of 3) Check PA Stages No or too low Power when keyed DC Voltage If U3201 Pin 2 is high, at U3501 replace PCIC Pin 23 =0? Check Resistive Net- >6 <2V Voltage at...

  • Page 181: Troubleshooting Flow Chart For 25W Transmitter (Sheet 3 Of 3)

    Troubleshooting Flow Chart for 25W Transmitter (Sheet 1 of 3) Troubleshooting Flow Chart for 25W Transmitter (Sheet 3 of 3 Check Final PA Stage Supply Voltage Bias 2 DC Voltage at Replace Q3441 TP3406? 1-4V Check Components ASFIC RF Voltage between ASFIC and U0221 Pin 6 Check FGU (U3301)

  • Page 182: Troubleshooting Flow Chart For 45W Transmitter (Sheet 1 Of 2)

    TROUBLESHOOTING CHARTS Troubleshooting Flow Chart for 45W Transmitter (Sheet 1 of 2) START No or too low Power when keyed Current Check Components between >500mA & <5A >5A increase Q3441 and RF Output, Antenna when keyed? Switch D3471,D3472 <500mA Control Voltage at Check PA Stages TP3402...
  • Page 183 Troubleshooting Flow Chart for 45W Transmitter (Sheet 1 of 2) Troubleshooting Flow Chart for Transmitter (Sheet 2 of 2) Check PA Stages No or too low Power when keyed Pin 3 Voltage 0.51 Check Voltage at Pin 2 & 3 of U3401 Replace U3401 * Voltage at Pin 1?

  • Page 184: Troubleshooting Flow Chart For Synthesizer

    TROUBLESHOOTING CHARTS Troubleshooting Flow Chart for Synthesizer 5V at Check 5V U3201 pins 5, Start Regulator 20, 34 & 36 U3211, R3211 Visual Correct check of the Problem Board OK? Is 16.8MHz 16.8MHz Replace Signal at signal at U3201 Is U3201 U3201 Pin U3201 pin at pin 6 of...

  • Page 185: Troubleshooting Flow Chart For Vco

    Troubleshooting Flow Chart for VCO Troubleshooting Flow Chart for VCO Low or no RF Signal Low or no RF Signal TX VCO RX VCO at input to PA at TP3001 Visual check Visual check Correct of board of board Problem Make sure U3211 is working correctly and runner 5V DC at U3301...
  • Page 186 3-10 TROUBLESHOOTING CHARTS...

  • Page 187: Allocation Of Schematics And Circuit Boards

    Chapter 4 VHF PCB/SCHEMATICS/PARTS LISTS Allocation of Schematics and Circuit Boards Controller Circuits The VHF circuits are contained on the printed circuit board (PCB) which also contains the Controller circuits. This Chapter shows the schematics for the VHF circuits only, refer to the Controller section for details of the related Controller circuits .
  • Page 188 VHF PCB/SCHEMATICS/PARTS LISTS Table 4-4 VHF 1-25W Diagrams and Parts Lists PCB : 8486172B08 Main Board Top Side Page 4-32 8486172B08 Main Board Bottom Side Page 4-33 SCHEMATICS Power Amplifier 1 - 25W Page 4-34 FRACN Page 4-35 Voltage Controlled Oscillator Page 4-36 Receiver Front End Page 4-37...
  • Page 189 Allocation of Schematics and Circuit Boards Table 4-7 VHF 25-45W Diagrams and Parts Lists PCB : 8471235L02 Main Board Top Side Page 4-63 8471235L02 Main Board Bottom Side Page 4-64 SCHEMATICS Power Amplifier 1 - 45W Page 4-65 Page 4-66 Parts List: 8471235L02 Page 4-67 Controller version is T12...
  • Page 190 VHF PCB/SCHEMATICS/PARTS LISTS...

  • Page 191: Vhf 1-25W Pcb 8486172B04 / Schematics

    VHF 1-25W PCB 8486172B04 / Schematics VHF 1-25W PCB 8486172B04 / Schematics R3242 J0451 C3209 D3221 Q3221 R3221 C0251 C3221 C0267 C3210 C3222 R3224 R3222 C0255 C0211 R0267 R3223 L3201 L3232 C3226 C3231 C3145 FL3114 R3145 Y3102 R0252 C0212 C3213 R3225 C3229 R0211...
  • Page 192 VHF 1-25W PCB 8486172B04 / Schematics C3146 C3152 D3261 TP3202 C0205 R3146 R0208 C3263 C 3203 R 3201 TP3201 R3203 C3147 R3152 J0401 C3261 C3241 C3202 R0265 R3155 R3204 C0265 C3151 R0266 R3147 D3201 R3261 C0492 C0254 C3207 FL3115 R3135 Q3152 C0498 C3208...
  • Page 193 VHF 1-25W PCB 8486172B04 / Schematics L3402 PASUPVLTG_VHF_PA_1 PASUPVLTG 57R01 C3436 C3437 C3405 C3406 10uF .033uF L3436 470pF 470pF 57R01 L3421 9V3_VHF_PA_1 9V3FLT 57R01 C3421 .033uF C3493 C3495 U_PREDRIVER U_DRIVER C3438 C3439 C3403 470pF 470pF 6.8pF 3.3pF R3491 33pF L3403 C3423 L3437 C3402...
  • Page 194 VHF 1-25W PCB 8486172B04 / Schematics VDDA_VHF_FN_1 R3211 VDDA C3212 C3214 2.2uF .018uF VDDA U3211 LP2951 5V_VHF_FN_1 5V_VHF_FN_2 IN_5V_RF_REG_VHF_FN_1 4.97VDC (SOURCE) OUTPUT INPUT IN_5V_RF_REG 13.30VDC FEEDBACK 7 ERROR C3213 6.83VDC SENSE SHUTDOWN 2.2uF 5V_TAP C3211 11.28VDC L3201 C3215 0.1uF 390nH 2.2uF C3202 .01uF...
  • Page 195 VHF 1-25W PCB 8486172B04 / Schematics Q3303 9.14VDC (R) UMC5N 9V3_VHF_VCO_3 9V3_VHF_VCO_1 9V3_VHF_VCO_2 0VDC (T) 9.12VDC 4.97VDC VDDA_VHF_VCO_1 3.83VDC (R) VDDA 0VDC (T) VSF_VHF_VCO_1 4.54VDC 7.44VDC (R) L3333 R3311 0VDC (T) C3335 .01uF R3331 R3335 C3336 C3337 C3324 R3312 0.1uF .01uF .01uF C3311...
  • Page 196 4-10 VHF 1-25W PCB 8486172B04 / Schematics Q3021 R3006 FECNTL_2_VHF_FE_1 4.7K C3027 FECNTL_2 0.1uF C3026 C3029 0.1uF 330pF R3010 R3025 IF_VHF_FE_1 9V3_VHF_FE_1 L3031 R3002 270nH R3011 9V3_VHF_FE_2 4.7K C3010 C3028 C3000 C3035 C3011 330pF 0.1uF R3031 43pF .0033uF .0033uF C3007 R3024 .0033uF D3000...
  • Page 197 VHF 1-25W PCB 8486172B04 / Schematics 4-11 FL3115 CFWC455F MC74HC4066 FL3113 FL3111 CFUCJ455F CFWC455G CNTL 9V3_VHF_IF_1 CNTL CNTL CNTL R3153 9V3_VHF_IF_2 U3115-1 U3111-1 U3111-4 U3115-4 Q3151 MC74HC4066 MC74HC4066 MC74HC4066 MC74HC4066 R3151 BWSELECT_VHF_IF_1 BWSELECT R3104 R3114 FL3114 FL3112 C3151 CFUCJ455D CFWC455D .01uF 5V_VHF_IF_1 12.5kHz 0VDC...
  • Page 198 4-12 VHF 1-25W PCB 8486172B04 / Schematics VHF PCB 8486172B04 Parts List 1-25W Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Part No. Part No. Part No. C3139 2113743E20 100nF C3311 2113743E07 22nF C3424 2113740F67 470pF 5% 50V Circuit...
  • Page 199 VHF 1-25W PCB 8486172B04 / Schematics 4-13 Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Part No. Part No. Part No. Part No. D3031 4886143B01 MIXER DIODE CROSSOVER L3412 2462587X43 IND CHIP LO-PRO 15.0 N R3022...
  • Page 200 4886182B01 VCTCXO 16.8MHz 2ppm TTSO5V * Y3261 Not Used 16.8MHz 75Z04 * Motorola Depot Servicing only Reference designators with an asterisk indicate components which are not fieldreplaceable because they need to be calibrated with specialized factory equipment after installation. Radios in which these parts have been replaced in the field will be off frequency at temperature extremes.

  • Page 201: Vhf 1-25W Pcb 8486172B06 / Schematics

    VHF 1-25W PCB 8486172B06 / Schematics 4-15 VHF 1-25W PCB 8486172B06 / Schematics C3240 R3242 R3221 C0251 J0451 C0267 C3222 C3221 R3224 C3145 C3210 C0211 L3201 R3222 C3226 C3231 R3145 R0252 C0212 R0267 R3225 R3223 FL3114 C3213 C3148 L3232 C3255 C3227 Y3102 R0211...
  • Page 202 4-16 VHF 1-25W PCB 8486172B06 / Schematics TP3202 C3241 C3203 C3146 R3241 R3201 C3152 C3263 C3262 C0205 R0208 C0255 TP3201 J0401 C3147 R3152 C3207 C3261 R3203 R0412 R0265 C0492 R3204 R3147 C3151 R3262 R0266 C0265 D3201 C0254 D3261 R3261 C0497 C3202 R3146 FL3115...
  • Page 203 VHF 1-25W PCB 8486172B06 / Schematics 4-17 L3402 PASUPVLTG_VHF_PA_1 PASUPVLTG 57R01 C3437 C3436 C3405 C3406 L3436 .033uF 10uF 470pF 470pF 57R01 L3421 9V3_VHF_PA_1 9V3FLT 57R01 C3421 .033uF C3493 C3495 U_PREDRIVER U_DRIVER C3438 C3439 6.8pF 3.3pF C3403 R3491 470pF 470pF C3423 33pF C3422 C3402...
  • Page 204 4-18 VHF 1-25W PCB 8486172B06 / Schematics VDDA_VHF_FN_1 R3211 VDDA C3214 2.2uF U3211 ADP3300 VDDA 5V_VHF_FN_1 5V_VHF_FN_2 IN_5V_RF_REG_VHF_FN_1 4.97VDC (SOURCE) IN_5V_RF_REG 13.30VDC C3213 6.83VDC 2.2uF L3201 C3211 11.28VDC C3215 390nH C3202 0.1uF 2.2uF .01uF R3201 C3203 VCOBIAS_1_VHF_FN_1 D3201 C3210 VCOBIAS_1 .01uF 2.2uF R3224...
  • Page 205 VHF 1-25W PCB 8486172B06 / Schematics 4-19 WARISMOBILE VHF_VCO Q3303 UMC5N 9V3_VHF_VCO_2 9.14VDC (R) 9V3_VHF_VCO_3 9V3_VHF_VCO_1 0VDC (T) 9.21VDC 3.83VDC (R) VDDA_VHF_VCO_1 4.97VDC VDDA 0VDC (T) VSF_VHF_VCO_1 4.54VDC L3333 7.44VDC (R) R3311 0VDC (T) C3335 .01uF R3335 C3336 R3331 C3337 C3324 .01uF R3312...
  • Page 206 4-20 VHF 1-25W PCB 8486172B06 / Schematics R3026 Q3021 R3027 FECNTL_2_VHF_FE_1 R3006 FECNTL_2 C3029 C3026 330pF 0.1uF R3010 9V3_VHF_FE_1 R3002 R3025 1.5K C3010 9V3_VHF_FE_2 IF_VHF_FE_1 C3000 330pF L3031 C3011 R3011 C3007 3300pF 3300pF 4.7K C3028 560nH 3300pF R3028 C3027 C3035 .01uF D3000 18pF...
  • Page 207 VHF 1-25W PCB 8486172B06 / Schematics 4-21 FL3115 9180469V04 U3111-1 FL3111 FL3113 9180468v04 9180469V03 1 IN 1 IN CNTL CNTL CNTL CNTL R3153 U3111-4 U3115-1 U3115-4 9V3_VHF_IF_1 R3151 BWSELECT_VHF_IF_1 R3114 BWSELECT 9V3_VHF_IF_2 U3115-3 R3104 U3115-2 U3111-2 U3111-3 12.5kHz 0VDC FL3112 FL3114 C3151 20/25kHz 5VDC...
  • Page 208 4-22 VHF 1-25W PCB 8486172B06 / Schematics VHF PCB 8486172B06 Parts List 1-25W Circuit Motorola Part Circuit Motorola Part Circuit Motorola Part Description Description Description C3139 2113743E20 100nF 16V C3315 2113740F31 15pF 5% 50V C3426 2113740F63 330pF 5% 50V Circuit...
  • Page 209 VHF 1-25W PCB 8486172B06 / Schematics 4-23 Circuit Motorola Part Circuit Motorola Part Circuit Motorola Part Circuit Motorola Part Description Description Description Description D3101 4880154K03 DIODE DUAL SCHOTTKY L3421 2484657R01 Ferrite Bead R3025 0662057A53 1k5 1/16W 5% R3302 0662057A25 100 1/16W 5%...
  • Page 210 4-24 VHF 1-25W PCB 8486172B06 / Schematics Circuit Motorola Part Description * Motorola Depot Servicing only R3441 0662057A87 39k 1/16W 5% Reference designators with an asterisk indicate R3442 0662057A57 2k2 1/16W 5% components which are not fieldreplaceable R3443 0662057A87 39k 1/16W 5%...

  • Page 211: Vhf 1-25W Pcb 8486172B07 / Schematics

    VHF 1-25W PCB 8486172B07 / Schematics 4-25 VHF 1-25W PCB 8486172B07 / Schematics C3240 R3242 C0251 R0257 R3221 J0451 C3222 C0256 C3210 R3224 C3145 L3201 C0211 C3221 R3222 L3232 C3226 C3231 R0256 R0252 C0212 C3213 R3225 R3223 R3145 FL3114 U0251 C3212 C3229 C3255...
  • Page 212 4-26 VHF 1-25W PCB 8486172B07 / Schematics TP3202 C3241 C3203 R3201 C3146 C3152 D3261 R0265 C3262 R3241 C3147 C3263 TP3201 C0255 J0401 R3203 C0267 R3152 R3146 C3261 C3207 R0412 R0441 R0267 R3204 R3262 C0492 R0266 C3151 C0265 D3201 R3261 R3147 C0254 C3202 FL3115...
  • Page 213 VHF 1-25W PCB 8486172B07 / Schematics 4-27 FL3115 9180469V04 U3111-1 FL3111 FL3113 9180468v04 9180469V03 1 IN 1 IN CNTL CNTL CNTL CNTL R3153 U3111-4 U3115-1 U3115-4 9V3_VHF_IF_1 R3151 BWSELECT_VHF_IF_1 R3114 BWSELECT 9V3_VHF_IF_2 U3115-3 R3104 U3111-2 U3111-3 U3115-2 12.5kHz 0VDC FL3112 FL3114 C3151 20/25kHz 5VDC...
  • Page 214 4-28 VHF 1-25W PCB 8486172B07 / Schematics VDDA_VHF_FN_1 R3211 VDDA C3214 2.2uF U3211 ADP3300 VDDA 5V_VHF_FN_1 5V_VHF_FN_2 IN_5V_RF_REG_VHF_FN_1 4.97VDC IN_5V_RF_REG (SOURCE) 13.30VDC C3213 6.83VDC 2.2uF C3212 L3201 C3211 11.28VDC C3215 390nH .022uF 0.1uF 2.2uF C3202 .01uF R3201 C3203 VCOBIAS_1_VHF_FN_1 D3201 C3210 VCOBIAS_1 2.2uF...
  • Page 215 VHF 1-25W PCB 8486172B07 / Schematics 4-29 VHF PCB 8486172B07 Parts List 1-25W Circuit Motorola Part Circuit Motorola Part Circuit Motorola Part Description Description Description C3137 2113743E11 39nF 10% C3303 2113741F49 10nF 50V C3422 2113740A67 330pF 5% 50V Circuit Motorola Part...
  • Page 216 4-30 VHF 1-25W PCB 8486172B07 / Schematics Circuit Motorola Part Circuit Motorola Part Circuit Motorola Part Circuit Motorola Part Description Description Description Description D3003 4880154K03 DUAL SCHOTTKY SOT23 L3401 2460591A01 SQUARE COIL 4.22nH 3T R3014 0662057A18 51 1/16W 5% R3223...
  • Page 217 * Y3261 Not Used 16.8MHz 75Z04 R3431 0680194M18 51 1W 5% R3432 0680194M18 51 1W 5% * Motorola Depot Servicing only R3433 0662057C13 2R7 1/10W 5% Reference designators with an asterisk indicate R3434 0662057C13 2R7 1/10W 5% components which are not fieldreplaceable...

  • Page 218: Vhf 1-25W Pcb 8486172B08 / Schematics

    4-32 VHF 1-25W PCB 8486172B08 / Schematics VHF 1-25W PCB 8486172B08 / Schematics C3240 R3242 J0451 C0251 R0257 R3221 C3222 C0256 R3224 C3145 C3210 C3221 C0211 R3222 L3201 L3232 C3226 R0256 R3145 C0212 FL3114 R0252 C3213 R3223 Y3102 C3148 C3227 R0211 C3231 C3255...
  • Page 219 VHF 1-25W PCB 8486172B08 / Schematics 4-33 TP3202 C3241 R3201 C3146 C3152 D3261 C3203 C3263 C0267 TP3201 C0255 J0401 R3146 C3147 R3152 R3203 D3201 R0267 C0492 C3151 R3204 C0265 R3147 Q3152 U0653 R0468 R3261 C0254 FL3115 C0202 C0497 C3144 R0206 R0203 C0491 U0652...
  • Page 220 4-34 VHF 1-25W PCB 8486172B08 / Schematics L3402 PASUPVLTG_VHF_PA_1 PASUPVLTG 57R01 C3437 C3436 C3405 C3406 L3436 .033uF 10uF 470pF 470pF 57R01 L3421 9V3_VHF_PA_1 9V3FLT 57R01 C3421 .033uF C3493 C3495 U_PREDRIVER U_DRIVER C3438 C3439 6.2pF 3.3pF C3403 R3491 470pF 470pF 33pF C3423 C3422 C3402...
  • Page 221 VHF 1-25W PCB 8486172B08 / Schematics 4-35 VDDA_VHF_FN_1 R3211 VDDA C3214 2.2uF U3211 ADP3300 VDDA 5V_VHF_FN_1 5V_VHF_FN_2 IN_5V_RF_REG_VHF_FN_1 4.97VDC IN_5V_RF_REG (SOURCE) 13.30VDC C3213 6.83VDC 2.2uF L3201 C3212 C3211 11.28VDC C3215 390nH .022uF 0.1uF 2.2uF C3202 .01uF R3201 C3203 VCOBIAS_1_VHF_FN_1 D3201 C3210 VCOBIAS_1 2.2uF...
  • Page 222 4-36 VHF 1-25W PCB 8486172B08 / Schematics WARISMOBILE VHF_VCO Q3303 UMC5N 9V3_VHF_VCO_2 9.14VDC (R) 9V3_VHF_VCO_3 9V3_VHF_VCO_1 0VDC (T) 9.21VDC VDDA_VHF_VCO_1 3.83VDC (R) 4.97VDC VDDA 0VDC (T) VSF_VHF_VCO_1 4.54VDC L3333 7.44VDC (R) R3311 0VDC (T) C3335 .01uF R3335 C3336 R3331 C3324 C3337 R3312 .01uF...
  • Page 223 VHF 1-25W PCB 8486172B08 / Schematics 4-37 R3026 Q3021 R3027 FECNTL_2_VHF_FE_1 R3006 FECNTL_2 C3029 C3026 330pF 0.1uF R3010 9V3_VHF_FE_1 R3002 R3025 1.5K C3010 9V3_VHF_FE_2 IF_VHF_FE_1 C3000 330pF L3031 C3011 R3011 C3007 3300pF 4.7K 3300pF C3028 560nH 3300pF R3028 C3027 C3035 .01uF D3000 .01uF...
  • Page 224 4-38 VHF 1-25W PCB 8486172B08 / Schematics FL3115 CFWC455F 9180469V04 OUT 2 U3111-1 U3115-4 U3111-4 U3115-1 FL3113 FL3111 9180468v04 9180469V03 CFWC455G CFUCJ455F 1 IN 1 IN CNTL CNTL CNTL CNTL R3153 MC74HC4066 MC74HC4066 MC74HC4066 MC74HC4066 Q3151 9V3_VHF_IF_1 R3151 BWSELECT_VHF_IF_1 BWSELECT 9V3_VHF_IF_2 R3114 U3111-3...
  • Page 225 VHF 1-25W PCB 8486172B08 / Schematics 4-39 VHF PCB 8486172B08 Parts List 1-25W Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Part No. Part No. Part No. C3136 2113740L29 30pF 2% C3302 2113740F23 6.8pF 5% 50V C3421 2113741A57 33nF 50V...
  • Page 226 4-40 VHF 1-25W PCB 8486172B08 / Schematics Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Part No. Part No. Part No. Part No. D3003 4880154K03 DUAL SCHOTTKY SOT23 L3401 2460591A01 SQUARE COIL 4.22nH 3T R3015 0662057A01...
  • Page 227 * Y3261 Not Used 16.8MHz 75Z04 R3432 0680194M18 51 1W 5% R3433 0662057C13 2R7 1/10W 5% * Motorola Depot Servicing only R3434 0662057C13 2R7 1/10W 5% Reference designators with an asterisk indicate R3435 0662057C13 2R7 1/10W 5% components which are not fieldreplaceable...

  • Page 228: Vhf 25-45W Pcb 8486140B12 / Schematics

    4-42 VHF 25-45W PCB 8486140B12 / Schematic VHF 25-45W PCB 8486140B12 / Schematic R3242 C3240 C0251 R0257 J0451 R3221 C3221 R3222 C0256 C3210 R3224 C3145 L3201 C0211 L3232 C3226 C3231 C3222 C0212 R0256 R3145 R0252 C3213 R3225 R3223 FL3114 Y3102 U0251 C3148 C3255...
  • Page 229 VHF 25-45W PCB 8486140B12 / Schematic 4-43 C3146 C3152 D3261 C3241 TP3202 C3203 R3201 C0205 R0208 R3262 C0267 C3263 C0255 TP3201 R0265 R3203 J0401 C3147 R3146 R3152 C3261 C3202 R0267 C3262 R3241 R0266 R3147 C3151 R3204 C0265 D3201 R3261 C0492 C0254 C3207 R0468...
  • Page 230 4-44 VHF 25-45W PCB 8486140B12 / Schematic L3402 PASUPVLTG_VHF_PA_1 57R01 PASUPVLTG C3436 C3437 C3456 C3457 C3406 10uF 0.1uF C3405 1000pF C3421 1000pF L3421 1000pF 1000pF .01uF 57R01 L3431 L3443 57R01 L3473 57R01 1.2uH 9V3_VHF_PA_1 VCONT C3445 C3492 R3461 C3402 C3438 C3439 1000pF 470pF...

  • Page 231: Vhf 25-45W Pcb 8486140B12 Parts List

    VHF 25-45W PCB 8486140B12 / Schematic 4-45 VHF PCB 8486140B12 25-45W Parts Motorola Part Motorola Part Motorola Part Circuit Ref Description Circuit Ref Description Circuit Ref Description List C3142 2113743E20 100nF 16V C3333 2113743E20 100nF 16V C3440 2113741M69 0.1uF 50V...
  • Page 232 4-46 VHF 25-45W PCB 8486140B12 / Schematic Motorola Part Motorola Part Motorola Part Motorola Part Circuit Ref Description Circuit Ref Description Circuit Ref Description Circuit Ref Description D3221 4880236E05 CHIP SCHOTTKY L3433 2460591B73 SQUARE COIL 12.77nH 10% R3026 0662057A73 10k 1/16W 5%...
  • Page 233 VCTCXO 16.8MHz 2ppm TTSO5V * Y3261 Not Used 16.8MHz 75Z04 * Motorola Depot Servicing only Reference designators with an asterisk indicate components which are not fieldreplaceable because they need to be calibrated with specialized factory equipment after installation. Radios in which these parts have been replaced in the field will be off frequency at temperature extremes.

  • Page 234: Vhf 25-45W Pcb 8486140B13 / Schematics

    4-48 VHF 25-45W PCB 8486140B13 VHF 25-45W PCB 8486140B13 R3242 C3240 D3221 Q3221 C0251 R0257 J0451 R3221 C3222 C0256 R3224 C3145 C3210 R3222 C3221 C0211 L3201 L3232 C3226 C3231 R0256 R3145 C0212 R3225 FL3114 R0252 C3213 R3223 Y3102 C3148 C3255 C3227 C3229 R0211...
  • Page 235 VHF 25-45W PCB 8486140B13 4-49 C3241 C3146 C3203 R3201 C3152 D3261 C0267 C3147 C3263 C0255 TP3201 J0401 R3152 R3146 C3261 C3202 R3203 C0492 R0412 R0267 C3151 R3204 C0265 R0441 D3201 U0653 R3261 C0497 C0254 C3207 R0266 R3147 FL3115 C0202 R0468 Q3152 R0206 R0203...
  • Page 236 4-50 VHF 25-45W PCB 8486140B13 VHF PCB 8486140B13 25-45W Parts Motorola Part Motorola Part Motorola Part Circuit Ref Description Circuit Ref Description Circuit Ref Description List C3142 2113743E20 100nF 16V C3333 2113743E20 100nF 16V C3440 2113741M69 0.1uF 50V C3143 2113740F53...
  • Page 237 VHF 25-45W PCB 8486140B13 4-51 Motorola Part Motorola Part Motorola Part Motorola Part Circuit Ref Description Circuit Ref Description Circuit Ref Description Circuit Ref Description D3221 4880236E05 CHIP SCHOTTKY L3433 2460591B73 SQUARE COIL 12.77nH 10% R3026 0662057A73 10k 1/16W 5%...
  • Page 238 VCTCXO 16.8MHz 2ppm TTSO5V * Y3261 Not Used 16.8MHz 75Z04 * Motorola Depot Servicing only Reference designators with an asterisk indicate components which are not fieldreplaceable because they need to be calibrated with specialized factory equipment after installation. Radios in which these parts have been replaced in the field will be off frequency at temperature extremes.

  • Page 239: Vhf 25-45W Pcb 8486140B15 / Schematics

    VHF 25-45W PCB 8486140B15 / Schematics 4-53 VHF 25-45W PCB 8486140B15 / Schematics J0451 C3240 C0251 R0257 R3221 C3222 C3221 C0256 C3145 C3210 R3224 L3201 R3242 R3222 C0211 C3226 C3231 L3232 C0212 R0256 R3145 R0252 C3213 C3229 R3223 FL3114 U0251 Y3102 U0211 C3212...
  • Page 240 4-54 VHF 25-45W PCB 8486140B15 / Schematics TP3202 C3241 R3201 C3146 C3152 D3261 C3203 J0401 FRACN-T7 C3263 C0255 TP3201 C0267 C3147 R3152 R3146 C3207 C3202 R3265 R3203 R3261 C0492 R0267 C3151 R3204 C0254 C0265 D3201 R0468 R3147 R0266 C3261 FL3115 C3208 C0497 C0202...
  • Page 241 VHF 25-45W PCB 8486140B15 / Schematics 4-55 L3402 57R01 R3510 PASUPVLTG_VHF_PA_1 FSWB2 FSWB C3544 C3545 C3546 R3515 R3511 0.1uF .01uF PASUPVLTG 100K L3436 U3503-1 57R01 C3437 C3436 FSWB2 10uF .033uF C3405 C3406 470pF 470pF Q1503 R3518 L3437 FSWB L3421 R3512 V_SENSE 17nH 57R01...
  • Page 242 4-56 VHF 25-45W PCB 8486140B15 / Schematics R3211 VDDA_VHF_FN_1 VDDA C3214 2.2uF U3211 VDDA ADP3300 5V_VHF_FN_1 5V_VHF_FN_2 IN_5V_RF_REG_VHF_FN_1 4.97VDC C3212 IN_5V_RF_REG (SOURCE) 13.30VDC 6.83VDC .022uF C3213 C3211 C3215 11.28VDC L3201 2.2uF 0.1uF 2.2uF 390nH C3202 .01uF R3201 C3203 VCOBIAS_1_VHF_FN_1 D3201 C3210 VCOBIAS_1 .01uF...
  • Page 243 VHF 25-45W PCB 8486140B15 / Schematics 4-57 Q3303 UMC5N 9.14VDC (R) 9V3_VHF_VCO_3 9V3_VHF_VCO_2 9V3_VHF_VCO_1 0VDC (T) 9.21VDC VDDA_VHF_VCO_1 3.83VDC (R) 4.97VDC VDDA 0VDC (T) VSF_VHF_VCO_1 4.54VDC L3333 7.44VDC (R) 0VDC (T) R3311 C3335 .01uF R3331 R3335 C3336 C3337 C3324 R3312 0.1uF .01uF .01uF...
  • Page 244 4-58 VHF 25-45W PCB 8486140B15 / Schematics R3026 Q3021 R3027 FECNTL_2_VHF_FE_1 R3006 FECNTL_2 C3029 C3026 330pF 0.1uF R3010 R3025 9V3_VHF_FE_1 R3002 1.5K 9V3_VHF_FE_2 L3031 C3000 C3007 C3010 C3011 R3011 C3028 3300pF 4.7K 3300pF 330pF 3300pF C3027 R3028 560nH .01uF IF_VHF_FE_1 C3035 .01uF 18pF...
  • Page 245 VHF 25-45W PCB 8486140B15 / Schematics 4-59 FL3115 CFWC455F 9180469V04 OUT 2 U3111-1 U3111-4 U3115-1 U3115-4 FL3113 FL3111 9180468v04 9180469V03 CFWC455G CFUCJ455F 1 IN 1 IN CNTL CNTL CNTL CNTL R3153 MC74HC4066 MC74HC4066 MC74HC4066 MC74HC4066 Q3151 9V3_VHF_IF_1 R3151 BWSELECT_VHF_IF_1 BWSELECT 9V3_VHF_IF_2 R3114 U3111-3...
  • Page 246 4-60 VHF 25-45W PCB 8486140B15 / Schematics VHF PCB 8486140B15 Parts List Circuit Motorola Part Circuit Motorola Part Circuit Motorola Part Description Description Description 25-45W C3141 2113743E20 .10 UF 10% C3324 2113741F49 10000 C3439 2111078B59 RF 470 5 NPO 100V...
  • Page 247 VHF 25-45W PCB 8486140B15 / Schematics 4-61 Circuit Motorola Part Circuit Motorola Part Circuit Motorola Part Circuit Motorola Part Description Description Description Description D3402 4813833C02 DUAL 70V '5B' COMM CATH L3443 2485873L01 ENCAPSULATED AIR WOUND R3033 0662057B47 0 OHMS +.050 OHMS...
  • Page 248 4-62 VHF 25-45W PCB 8486140B15 / Schematics Circuit Motorola Part Description R3502 0662057A87 39K OHMS 5% R3504 0662057A73 10K OHMS 5% R3505 0662057B09 300K OHMS R3507 0662057A80 20K OHMS 5% R3508 0662057A97 100K OHM 5% R3509 0662057A49 1000 OHMS 5%...

  • Page 249: Vhf 1-25W Pcb 8471235L02 / Schematics

    VHF 1-25W PCB 8471235L02 / Schematics 4-63 VHF 1-25W PCB 8471235L02 / Schematics R3242 J0451 C0251 R0257 R3221 R3224 C3210 L3232 C3226 C0212 C3213 R3223 FL3114 Y3102 C3255 C3227 C3212 C3242 R3227 R0212 U3211 C3245 R0251 C3143 R3135 C3243 C0252 C3211 R3211 C3244...
  • Page 250 4-64 VHF 1-25W PCB 8471235L02 / Schematics R3418 L3402 L3436 R3429 R3440 C3438 U3402 E0631 S3440 R3441 C3440 R3445 R3443 R3442 VR0601 C3413 VR0509 R3412 VR0504 C3495 C3414 C3415 R3444 R0531 R0541 R3411 C3416 C0541 R0174 R0525 C0621 R0542 L3492 C3452 C3503 R0530...
  • Page 251 VHF 1-25W PCB 8471235L02 / Schematics 4-65 PASUPVLTG_VHF_PA_1 PASUPVLTG L3402 C3436 C3437 57R01 L3436 10uF .033uF 57R01 C3405 C3406 470pF 470pF L3421 57R01 C3438 C3439 470pF 470pF R3491 C3403 C3423 C3422 L3437 C3402 33pF L3403 C3493 C3495 L3411 17nH 6.2pF 3.3pF .022uF 68nH...
  • Page 252 4-66 VHF 1-25W PCB 8471235L02 / Schematics VHF (136-174 MHz) IF...
  • Page 253 4-67 VHF 1-25W PCB 8471235L02 / Schematics VHF PCB 8471235L02 Parts List 1-25W Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Part No. Part No. Part No. C3132 2113945C31 CAP 0.1 UF C3247 2113944C30 CAP 10 PF C3410 2113945C04 CAP 0.022 UF...
  • Page 254 VHF 1-25W PCB 8471235L02 / Schematics 4-68 Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Part No. Part No. Part No. Part No. C3496 2111078B31 CAP 36 PF L3331 2414032F32 IND 68 NH Q3472 4805128M27 TRANSISTOR SOT...
  • Page 255 4816142H01 TCXO REF 16.8MHZ R3432 0613959Y42 RES 51 Ohm R3433 0613958H11 RES 2.7 Ohm * Motorola Depot Servicing only R3434 0613958H11 RES 2.7 Ohm Reference designators with an asterisk indicate R3435 0613958H11 RES 2.7 Ohm components which are not fieldreplaceable...
  • Page 256 4-70 VHF 1-25W PCB 8471235L02 / Schematics...
  • Page 257 Professional Radio GM Series UHF (403-470MHz) Service Information Issue: May 2007...
  • Page 258 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 259 Table of Contents Chapter 1 MODEL CHART AND TECHNICAL SPECIFICATIONS 1.0 GM140/GM160 Model Chart................1-1 2.0 GM340/GM360/GM380 Model Chart ..............1-2 3.0 GM640/GM660/GM1280 Model Chart ..............1-3 4.0 Technical Specifications ..................1-4 Chapter 2 THEORY OF OPERATION 1.0 Introduction ......................2-1 2.0 UHF (403-470MHz) Receiver ................2-1 2.1 Receiver Front-End ..................2-1 2.2 Front-End Band-Pass Filters &...
  • Page 260 Chapter 3 TROUBLESHOOTING CHARTS 1.0 Troubleshooting Flow Chart for Receiver (Sheet 1 of 2) ........3-1 1.1 Troubleshooting Flow Chart for Receiver (Sheet 2 of 2) ........3-2 2.0 Troubleshooting Flow Chart for 25W Transmitter (Sheet 1 of 3) ......3-3 2.1 Troubleshooting Flow Chart for 25W Transmitter (Sheet 2 of 3) ......

  • Page 261: Chapter 1 Model Chart And Technical Specifications

    Chapter 1 MODEL CHART AND TECHNICAL SPECIFICATIONS GM140/GM160 Model Chart GM Series UHF 403-470 MHz Model Description MDM25RKC9AN1_E GM140, 403-470 MHz, 25-40W, 4 Ch MDM25RKF9AN5_E GM160, 403-470 MHz, 25-40W, 128 Ch MDM25RHC9AA1_E GM140, 403-470 MHz, 1-25W, 4 Ch MDM25RHF9AA5_E GM160, 403-470 MHz, 1-25W, 128 Ch Item Description GCN6112_...

  • Page 262: Gm340/Gm360/Gm380 Model Chart

    MODEL CHART AND TECHNICAL SPECIFICATIONS GM340/GM360/GM380 Model Chart GM Series UHF 403-470 MHz Model Description MDM25RHC9AN1_E GM340, 403-470 MHz, 1-25W, 6 Ch MDM25RHF9AN5_E GM360, 403-470 MHz, 1-25W, 255 Ch MDM25RHC9AN8_E GM380, 403-470 MHz, 1-25W, 255 Ch MDM25RHA9AN0_E Databox, 403-470 MHz, 1-25W, 16 Ch Item Description GCN6112_...

  • Page 263: Gm640/Gm660/Gm1280 Model Chart

    GM640/GM660/GM1280 Model Chart GM640/GM660/GM1280 Model Chart GM Series UHF 403-470 MHz Model Description MDM25RHC9CK1_E GM640, 403-470 MHz, 1-25W, 6 Ch MDM25RHF9CK5_E GM660, 403-470 MHz, 1-25W, 255 Ch MDM25RHN9CK8_E GM1280, 403-470 MHz, 1-25W, 255 Ch MDM25RHA9CK7_E Databox, 403-470 MHz, 1-25W, 16 Ch Item Description GCN6112_...

  • Page 264: Technical Specifications

    MODEL CHART AND TECHNICAL SPECIFICATIONS Technical Specifications Data is specified for +25°C unless otherwise stated. General Specifications Channel Capacity GM140 GM160 GM340 GM360 GM380 GM640 GM660 GM1280 Databox Power Supply 13.2Vdc (10.8 - 15.6Vdc) Dimensions: H x W x D (mm) Depth excluding knobs GM140/340/640 56mm x 176mm x 177mm (1 - 25W) 56mm x 176mm x 189mm (25 - 40W)
  • Page 265 Technical Specifications Transmitter 403-470 *Frequencies - Full Bandsplit Channel Spacing 12.5/20/25 kHz Frequency Stability ±2.0 ppm (-30°C to +60°C, +25° Ref.) Power 1-25W/25-40W ±2.5 @ 12.5 kHz Modulation Limiting ±4.0 @ 20 kHz ±5.0 @ 25 kHz -40 dB @ 12.5kHz FM Hum &...
  • Page 266 MODEL CHART AND TECHNICAL SPECIFICATIONS...

  • Page 267: Chapter 2 Theory Of Operation

    Chapter 2 THEORY OF OPERATION Introduction This Chapter provides a detailed theory of operation for the UHF circuits in the radio. For details of the theory of operation and trouble shooting for the the associated Controller circuits refer to the Controller Section of this manual.

  • Page 268: Front-End Band-Pass Filters & Pre-Amplifier

    THEORY OF OPERATION There are two 2-pole 44.85 MHz crystal filters in the high-IF section and 2 pairs of 455 kHz ceramic filters in the low-IF section to provide the required adjacent channel selectivity. The correct pair of ceramic filters for 12.5 or 25KHz channel spacing is selected via control line BWSELECT. The second IF at 455 kHz is mixed, amplified and demodulated in the IF IC.

  • Page 269: Uhf (403-470Mhz) Transmitter Power Amplifier (Pa) 25 W

    UHF (403-470MHz) Transmitter Power Amplifier (PA) 25 W produce the low IF signal at 455 kHz. The 2nd LO frequency is determined by crystal Y3101. The low IF signal is amplified and filtered by an external pair of 455 kHz ceramic filters FL3112, FL3114 for 20/25 kHz channel spacing or FL3111, FL3113/F3115 for 12.5 kHz channel spacing.

  • Page 270: First Power Controlled Stage

    THEORY OF OPERATION First Power Controlled Stage The first stage (U4401) is a 20dB gain integrated circuit containing two LDMOS FET amplifier stages. It amplifies the RF signal from the VCO (TXINJ). The output power of stage U4401 is controlled by a DC voltage applied to pin 1 from the op-amp U4402-1, pin 1. The control voltage simultaneously varies the bias of two FET stages within U4401.

  • Page 271: Directional Coupler

    UHF (403-470MHz) Transmitter Power Amplifier (PA) 25 W Directional Coupler The directional coupler is a microstrip printed circuit, which couples a small amount of the forward power delivered by Q4441. The coupled signal is rectified by D4451. The DC voltage is proportional to the RF output power and feeds the RFIN port of the PCIC (U4501 pin 1).

  • Page 272: Uhf (403-470Mhz) Frequency Synthesis

    THEORY OF OPERATION U4502 is a temperature-sensing device, which monitors the circuit board temperature in the vicinity of the transmitter driver and final devices, and provides a dc voltage to the PCIC (TEMP, pin 30) proportional to temperature. If the DC voltage produced exceeds the set threshold in the PCIC, the transmitter output power will be reduced so as to reduce the transmitter temperature.

  • Page 273: Voltage Controlled Oscillator (Vco)

    UHF (403-470MHz) Frequency Synthesis LOCK LOCK (U0101 PIN 56) DATA (U0101 PIN 100) DATA FREFOUT FREF (U0221 PIN 34) CLOCK (U0101 PIN 1) 6, 22, 33, 44 CSX (U0101 PIN 2) STEERING LINE MODIN MOD IN (U0221 PIN 40) 2-POLE IOUT 13, 30 LOOP...

  • Page 274: Synthesizer Operation

    THEORY OF OPERATION AUX3 (U4201 Pin 2) U4201 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 (U4201 Pin 28) Matching Vcc-Superfilter U4301 Low Pass Network VCOBIC Pin3 Filter...
  • Page 275 UHF (403-470MHz) Transmitter Power Amplifier (PA) 40W filter circuitry and DC supply. The output signal PRESC_OUT of the VCOBIC (U4301 pin12) is fed to pin 32 of U4201 (PREIN) via a low pass filter (C4229, L4225) which attenuates harmonics and provides the correct level to close the synthesizer loop.

  • Page 276: Power Controlled Stage

    2-10 THEORY OF OPERATION Antenna Pin Diode From VCO Antenna Harmonic Switch Filter RF Jack Controlled Power PA-Final Driver Driver Stage Sense Stage Bias 2 A S F I C _ C M P SPI BUS Bias 1 Temperature P C I C Sense Vcontrol To Microprocessor...

  • Page 277: Final Stage

    UHF (403-470MHz) Transmitter Power Amplifier (PA) 40W 2-11 Customer Programming Software (CPS). Care must be taken not to damage the device by exceeding the maximum allowed bias voltage. The device’s drain current is drawn directly from the radio’s DC supply voltage input, A+, via L4421. Final Stage The final stage uses the bipolar device Q4441.
  • Page 278 2-12 THEORY OF OPERATION programmed at several points across the frequency range of the transmitter to offset frequency response variations of the transmitter’s power detector circuitry. The PCIC provides a DC output voltage at pin 4 (INT) which is applied as CNTLVLTG to the power- adjust input pin of the first transmitter stage U4401.

  • Page 279: Chapter 3 Troubleshooting Charts

    Chapter 3 TROUBLESHOOTING CHARTS Troubleshooting Flow Chart for Receiver (Sheet 1 of 2) START Bad SINAD Bad 20dB Quieting No Recovered Audio Check Controller Audio at (in the case of no audio) pin 8 of OR ELSE go to “B” U3101 ? Spray or inject 44.85MHz into XTAL Filter FL3101...

  • Page 280: Troubleshooting Flow Chart For Receiver (Sheet 2 Of 2)

    TROUBLESHOOTING CHARTS Troubleshooting Flow Chart for Receiver (Sheet 2 of 2) Inject RF into J4401 Trace IF signal Signal at from C3101 to signal at Q3102 C3101? Q3101. Check for collector? bad XTAL filter. Before replacing U3101, check U3101 voltages. Signal at LO level OK? Check FGU...

  • Page 281: Troubleshooting Flow Chart For 25W Transmitter (Sheet 1 Of 3)

    Troubleshooting Flow Chart for 25W Transmitter (Sheet 1 of 3) Troubleshooting Flow Chart for 25W Transmitter (Sheet 1 of 3) START No or too low Power when keyed Check if Pressure Pad closes S5440 Check Components between Current Q4441 and RF Output, >500mA &...

  • Page 282: Troubleshooting Flow Chart For 25W Transmitter (Sheet 2 Of 3)

    TROUBLESHOOTING CHARTS Troubleshooting Flow Chart for 25W Transmitter (Sheet 2 of 3) Check PA Stages No or too low Power when keyed DC Voltage If U4201 Pin 2 is high, at U4501 replace PCIC Pin 23 =0? Check Resistive >6 <2V Voltage at DC Voltage...

  • Page 283: Troubleshooting Flow Chart For 25W Transmitter (Sheet 3 Of 3)

    Troubleshooting Flow Chart for 25W Transmitter (Sheet 1 of 3) Troubleshooting Flow Chart for 25W Transmitter (Sheet 3 of 3 Check Final PA Stage Supply Voltage Bias 2 DC Voltage at Replace Q4441 TP4406? 1-4V Check Components ASFIC RF Voltage between ASFIC and U0221 Pin 6 Check FGU (U4301)
  • Page 284 TROUBLESHOOTING CHARTS Troubleshooting Flow Chart for UHF 40W Transmitter START No power Is Vctrl Is Q4473 Check Check there? MOSBIAS_2 ASFIC Change Q4473 Check voltage Check on Pin 4 U4501 Check PCIC_MOSBIAS_1 PCIC Check R4422-5 and go back to top Check voltage on Pin 5 U4501 Are D4471 &...

  • Page 285: Troubleshooting Flow Chart For Synthesizer

    Troubleshooting Flow Chart for Synthesizer Troubleshooting Flow Chart for Synthesizer Start Check 5V at U4201 Regulator pins 5, 20, 34 U4211 & 36 Visual Correct check of the Problem Board Check D4201, C4202, C4203, & C4206 16.8MHz 16.8MHz Replace signal at Signal at U4201 U4201 at pin 6 of...

  • Page 286: Troubleshooting Flow Chart For Vco

    TROUBLESHOOTING CHARTS Troubleshooting Flow Chart for VCO Low or no RF Signal Low or no RF Signal TX VCO RX VCO at input to PA at TP4003 Visual check Visual check Correct of board of board Problem Make sure Synthesizer is 4.5V DC 4.5V DC working correctly and runner...

  • Page 287: Allocation Of Schematics And Circuit Boards

    Chapter 4 UHF PCB/SCHEMATICS/PARTS LISTS Allocation of Schematics and Circuit Boards Controller Circuits The UHF circuits are contained on the printed circuit board (PCB) which also contains the Controller circuits. This Chapter shows the schematics for the UHF circuits only, refer to the Controller section for details of the related Controller circuits .
  • Page 288 UHF PCB/Schematics/parts lists Table 4-3 UHF 1-25W Diagrams and Parts Lists PCB : 8485670Z03 Main Board Top Side Page 4-23 8485670Z03 Main Board Bottom Side Page 4-24 SCHEMATICS Power Amplifier 1 - 25W Page 4-25 FRACN Page 4-26 Voltage Controlled Oscillator Page 4-27 Receiver Front End Page 4-28...
  • Page 289 UHF 1-25W Band1 PCB 8485670Z02 / Schematics UHF 1-25W Band1 PCB 8485670Z02 / Schematics J0451 R4221 C0251 R0257 R4222 C4210 C4221 C0256 C4225 C3145 R4224 R4223 C0211 L4221 C4289 L4201 C4216 C4230 R0256 Y3102 C0212 C4213 FL3114 R3145 U0251 R0252 C4236 C4226 C3148...
  • Page 290 UHF 1-25W Band1 PCB 8485670Z02 / Schematics TP4202 C3146 C3152 D4261 C4262 R4203 C4203 C0205 R0208 C3147 C4263 R4262 C4241 C4207 C0267 R4201 R0265 C0255 TP4201 J0401 R3152 R3146 C4202 R0412 R0441 R0267 C0492 C3151 R4241 R0266 R3147 R4204 C0265 D4201 C4209 C0254...
  • Page 291 UHF 1-25W Band1 PCB 8485670Z02 / Schematics L4402 PASUPVLTG_UHF_PA_1 PASUPVLTG 57R01 C4405 C4406 C4436 C4437 L4436 100pF 100pF 10uF .033uF 57R01 9V3FLT L4421 9V3_UHF_PA_1 57R01 R4513 R4514 9V3FLT C4421 .033uF U_PREDRIVER U_DRIVER C4439 R4491 C4403 L4403 100pF L4437 C4423 C4422 C4402 C4411 C4412...
  • Page 292 UHF 1-25W Band1 PCB 8485670Z02 / Schematics C4212 .018uF U4211 LP2951 5V_UHF_FN_1 5V_UHF_FN_2 IN_5V_RF_REG_UHF_FN_1 4.97 VDC INPUT 8 OUTPUT IN_5V_RF_REG (SOURCE) FEEDBACK 7 6.68 VDC ERROR SHUTDOWN 3 SENSE C4215 10.87 VDC C4211 C4213 C4216 5V_TAP 2.2uF 0.1uF L4201 C4203 2.2uF C4201 12.7 VDC...
  • Page 293 UHF 1-25W Band1 PCB 8485670Z02 / Schematics Q4333 VCOBIAS_2_UHF_VCO 0 VDC (Tx) R4346 2.43 VDC (Rx) VCOBIAS_2 0 VDC (Tx) 4.7 VDC (Rx) C4375 VSF_UHF_VC0 R4301 R4341 4.58 VDC 5V_UHF_VCO RXSW 5.6K C4308 C4336 C4355 C4352 R4337 C4351 C4354 R4361 C4353 L4305 .022uF...
  • Page 294 UHF 1-25W Band1 PCB 8485670Z02 / Schematics R4071 Q4004 R4072 FECTRL_2_UHF_FE R4061 C4061 C4062 330pF 0.1uF R4002 9V3_UHF_FE R4062 1.5K C4069 R4070 .01uF C4011 C4012 C4013 C4010 R4016 3300pF 330pF 3300pF C4064 330pF 3.3K 0.1uF D4007 L4003 R4068 Q4002 470nH C4014 K9V1_UHF_FE 100pF...
  • Page 295 UHF 1-25W Band1 PCB 8485670Z02 / Schematics FL3115 9180469V04 OUT 2 MC74HC4066 FL3113 FL3111 9180469V03 9180468v04 1 IN 1 IN CNTL CNTL CNTL CNTL R3153 U3115-4 U3111-1 U3111-4 U3115-1 9V3_VHF_IF_1 R3151 BWSELECT_VHF_IF_1 R3114 BWSELECT 9V3_VHF_IF_2 3.9VDC 12.5kHz 0VDC R3104 FL3112 FL3114 R3115 C3151...
  • Page 296 4-10 UHF 1-25W Band1 PCB 8485670Z02 / Schematics UHF PCB 8485670Z02 Parts List 1-25W Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Part No. Part No. Part No. C4020 2113740F39 33pF C4245 2113740F51 100pF C4416 2113740F51 100pF Circuit Motorola...
  • Page 297 UHF 1-25W Band1 PCB 8485670Z02 / Schematics 4-11 Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Part No. Part No. Part No. Part No. CR4301 4805649Q13 DIODE, VARACTOR L4401 2460591B04 11.03nH R3135 0662057A51 1.2K R4301 0662057A67 5.6K...
  • Page 298 * Y4261 Not Used 16.8MHz 75Z04 Y4262 4886182B01 TCXO 16.8MHZ * Motorola Depot Servicing only Reference designators with an asterisk indicate components which are not fieldreplaceable because they need to be calibrated with specialized factory equipment after installation. Radios in which these parts have been replaced in the field will be off frequency at temperature extremes.

  • Page 299: Uhf 25-40W Pcb 8480643Z06 / Schematics

    UHF 25-40W PCB 8480643Z06 / Schematic 4-13 UHF 25-40W PCB 8480643Z06 / Schematic J0451 R4222 R4221 C0251 R0257 C4210 C4241 C0256 C4225 C3145 R4223 C4221 C0211 C4289 L4201 C4216 C4231 C4230 C0212 R0256 C4213 FL3114 R3145 U0251 R0252 Y3102 C4226 C3148 U3115 R0211...
  • Page 300 4-14 UHF 25-40W PCB 8480643Z06 / Schematic TP4202 C3146 C3152 R0208 D4261 R4203 C4203 C0205 C4263 C4207 C0267 TP4201 R4201 C0255 J0401 R0265 R3146 C3147 R3152 C4202 R0267 R4204 C0492 R0266 R3147 C3151 C4288 D4201 C0265 R4261 C4209 C0254 R0468 C0202 FL3115 Q3152...
  • Page 301 UHF 25-40W PCB 8480643Z06 / Schematic 4-15 PASUPVLTG L4402 PASUPVLTG PASUPVLTG_UHF_PA_1 C4495 C4478 57R01 C4484 C4490 C4493 1000pF 1000pF C4482 C4436 C4438 30pF C4497 30pF 0.1uF C4481 C4421 10uF C4485 C4602 C4632 C4489 1000pF 3000pF 30pF .033uF .033uF R4633 L4541 VR4472 L4421 L4436...
  • Page 302 4-16 UHF 25-40W PCB 8480643Z06 / Schematic C4212 .018uF U4211 LP2951 5V_UHF_FN_1 5V_UHF_FN_2 IN_5V_RF_REG_UHF_FN_1 4.97 VDC OUTPUT INPUT IN_5V_RF_REG ERROR FEEDBACK 6.68 VDC 2 SENSE C4216 SHUTDOWN C4213 10.87 VDC C4211 C4215 2.2uF 5V_TAP 0.1uF 2.2uF C4203 L4201 C4201 100pF 390nH 12.7 VDC .01uF...
  • Page 303 UHF 25-40W PCB 8480643Z06 / Schematic 4-17 Q4333 0 VDC (Tx) VCOBIAS_2_UHF_VCO 2.43 VDC (Rx) R4346 VCOBIAS_2 0 VDC (Tx) C4375 4.7 VDC (Rx) 0.1uF R4301 VSF_UHF_VC0 R4341 4.58 VDC 5V_UHF_VCO RXSW 5.6K C4308 C4355 C4352 C4336 C4354 C4351 R4361 C4353 R4337 L4305...
  • Page 304 4-18 UHF 25-40W PCB 8480643Z06 / Schematic R4071 Q4004 R4072 FECTRL_2_UHF_FE R4061 FECTRL_2 C4062 C4061 0.1uF 330pF 9V3_UHF_FE R4002 R4062 1.5K C4069 R4070 .01uF C4012 330pF C4010 C4013 C4011 3300pF 330pF R4016 C4064 3300pF 0.1uF 3.3K D4007 L4003 R4068 Q4002 470nH K9V1_UHF_FE D4006...
  • Page 305 UHF 25-40W PCB 8480643Z06 / Schematic 4-19 FL3115 CFWC455F 9180469V04 OUT 2 U3111-1 U3111-4 U3115-1 U3115-4 FL3113 FL3111 9180468v04 9180469V03 CFWC455G CFUCJ455F 1 IN 1 IN CNTL CNTL CNTL CNTL R3153 MC74HC4066 MC74HC4066 MC74HC4066 MC74HC4066 Q3151 9V3_VHF_IF_1 R3151 BWSELECT_VHF_IF_1 BWSELECT 9V3_VHF_IF_2 R3114 U3111-3...
  • Page 306 4-20 UHF 25-40W PCB 8480643Z06 / Schematic UHF PCB 8480643Z06, 25-40W PartsList Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Part No Part No Part No C4017 2113740F09 1.8pF C4244 2113740F51 100pF C4419 2113740F40 36pF Circuit Motorola Description C4018...
  • Page 307 UHF 25-40W PCB 8480643Z06 / Schematic 4-21 Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Part No Part No Part No Part No C4510 2111078B31 43pF L4311 2462587T22 390nH R3116 0662057A37 R4222 0662057A42 C4521 2113740F51 100pF...
  • Page 308 4-22 UHF 25-40W PCB 8480643Z06 / Schematic Circuit Motorola Description Part No * Motorola Depot Servicing only R4483 0662057A97 100K R4484 0662057A93 Reference designators with an asterisk indicate R4485 0662057C53 components which are not fieldreplaceable R4486 0662057C53 because they need to be calibrated with...
  • Page 309 UHF 1-25W Band1 PCB 8485670Z03 / Schematics 4-23 UHF 1-25W Band1 PCB 8485670Z03 / Schematics J0451 R4222 R4221 C0251 R0257 C4210 C0256 C3145 C4225 C4221 R4224 C0211 C4289 R0256 C0212 C4213 R3145 R0252 C4216 R4225 R4223 FL3114 Y3102 U0251 L4201 C4226 C3148 U0211...
  • Page 310 4-24 UHF 1-25W Band1 PCB 8485670Z03 / Schematics C4207 TP4202 C3146 C3152 D4261 C4262 R4203 C0205 R0208 C4203 C4263 C0255 TP4201 R4201 C0267 R0265 R3152 J0401 R3146 C3147 C4202 R4204 C0492 R0267 C3151 R3147 C0265 C4288 D4201 C0497 C0254 R0468 R4261 R0266 C4261...
  • Page 311 UHF 1-25W Band1 PCB 8485670Z03 / Schematics 4-25 L4402 PASUPVLTG_UHF_PA_1 PASUPVLTG 57R01 C4405 C4406 C4436 C4437 L4436 100pF 100pF .033uF 10uF 57R01 L4421 9V3_UHF_PA_1 9V3FLT 57R01 C4421 .033uF C4439 U_PREDRIVER U_DRIVER 100pF R4491 C4403 9.1pF L4403 C4402 C4408 L4411 C4411 C4412 C4423 C4422...
  • Page 312 4-26 UHF 1-25W Band1 PCB 8485670Z03 / Schematics U4211 ADP3300 5V_UHF_FN_1 5V_UHF_FN_2 IN_5V_RF_REG_UHF_FN_1 4.97 VDC ?X ERR (SOURCE) ?X OUT IN_5V_RF_REG 6.68 VDC ?X NR C4217 C4216 C4213 C4211 C4215 10.87 VDC .01uF 2.2uF 0.1uF 2.2uF C4203 L4201 C4201 R4224 390nH .01uF 100pF...
  • Page 313 UHF 1-25W Band1 PCB 8485670Z03 / Schematics 4-27 Q4333 0 VDC (Tx) VCOBIAS_2_UHF_VCO 2.43 VDC (Rx) R4346 VCOBIAS_2 0 VDC (Tx) C4375 4.7 VDC (Rx) 0.1uF VSF_UHF_VC0 R4301 4.58 VDC R4341 5V_UHF_VCO RXSW 5.6K C4355 C4352 C4351 C4308 C4354 2.2uF 0.1uF 100pF C4336...
  • Page 314 4-28 UHF 1-25W Band1 PCB 8485670Z03 / Schematics R4071 Q4004 R4072 FECTRL_2_UHF_FE R4061 FECTRL_2 C4062 C4061 0.1uF 330pF 9V3_UHF_FE R4002 R4062 1.5K R4070 C4069 .01uF C4012 C4013 C4010 C4011 R4016 330pF 3300pF C4064 330pF 3300pF 3.3K 0.1uF D4007 L4003 R4068 Q4002 470nH K9V1_UHF_FE...
  • Page 315 UHF 1-25W Band1 PCB 8485670Z03 / Schematics 4-29 FL3115 CFWC455F 9180469V04 OUT 2 U3111-1 U3111-4 U3115-1 U3115-4 FL3113 FL3111 9180468v04 9180469V03 CFWC455G CFUCJ455F 1 IN 1 IN CNTL CNTL CNTL CNTL R3153 MC74HC4066 MC74HC4066 MC74HC4066 MC74HC4066 Q3151 9V3_VHF_IF_1 R3151 BWSELECT_VHF_IF_1 BWSELECT 9V3_VHF_IF_2 R3114...
  • Page 316 4-30 UHF 1-25W Band1 PCB 8485670Z03 / Schematics UHF PCB 8485670Z03 Parts List 1-25W Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Part No. Part No. Part No. Circuit Motorola Description Part No. C4028 2113741F49 10nF C4307 2113740F51 100pF...
  • Page 317 0662057A73 10K Ohm Y4262 4886182B01 TCXO 16.8MHZ R4415 0662057A18 51 Ohm Q4332 4813827A07 R4062 0662057A53 1500 Ohm * Motorola Depot Servicing only R4416 0662057A18 51 Ohm Q4333 4802245J50 TRANSISTOR DUAL NPN/PNP R4063 0662057A39 390 Ohm R4418 0662057A59 2700 Ohm Reference designators with an asterisk indicate compo-...
  • Page 318 4-32 UHF 25-40W Band1 PCB 8486127Z01 / Schematics UHF 25-40W Band1 PCB 8486127Z01 / Schematics C4222 J0451 D4221 Q4221 C4221 C0251 R0257 R4221 C0256 C4225 C3145 C4289 C4210 C0211 L4221 R4224 L4201 C4216 R4223 C4230 C0212 R0256 C4213 C4236 R3145 R0252 C4226 FL3114...
  • Page 319 UHF 25-40W Band1 PCB 8486127Z01 / Schematics 4-33 C3152 TP4202 C3146 D4261 C4262 R4203 C4203 C3147 C4263 C4207 R4201 J0401 C0267 C0255 TP4201 R3152 R3146 C4202 R4204 R4261 R0412 R0441 C4261 R0267 C0492 R3147 C3151 R0266 C4288 D4201 C0265 C4209 R0468 U0653 C4201...
  • Page 320 4-34 UHF 25-40W Band1 PCB 8486127Z01 / Schematics PASUPVLTG L4402 PASUPVLTG PASUPVLTG_UHF_PA_1 C4485 C4602 C4481 C4484 C4421 C4495 C4478 C4489 C4490 C4436 C4493 C4438 L4421 L4436 30pF .033uF 3000pF 30pF .033uF 1000pF 1000pF C4497 10uF 0.1uF 1000pF L4438 C4437 C4439 17nH 100pF L4541...
  • Page 321 UHF 25-40W Band1 PCB 8486127Z01 / Schematics 4-35 C4212 .018uF U4211 LP2951 5V_UHF_FN_1 5V_UHF_FN_2 IN_5V_RF_REG_UHF_FN_1 4.97 VDC INPUT 8 (SOURCE) OUTPUT IN_5V_RF_REG FEEDBACK 7 6.68 VDC ERROR SHUTDOWN 3 SENSE C4215 10.87 VDC C4211 C4213 C4216 5V_TAP 2.2uF 0.1uF L4201 C4203 2.2uF C4201...
  • Page 322 4-36 UHF 25-40W Band1 PCB 8486127Z01 / Schematics Q4333 VCOBIAS_2_UHF_VCO 0 VDC (Tx) R4346 2.43 VDC (Rx) VCOBIAS_2 0 VDC (Tx) 4.7 VDC (Rx) C4375 VSF_UHF_VC0 R4301 R4341 4.58 VDC 5V_UHF_VCO RXSW 5.6K C4308 C4336 C4355 R4337 C4352 C4351 C4354 C4353 R4361 L4305...
  • Page 323 UHF 25-40W Band1 PCB 8486127Z01 / Schematics 4-37 R4071 Q4004 R4072 FECTRL_2_UHF_FE R4061 C4061 C4062 330pF 0.1uF R4002 9V3_UHF_FE R4062 1.5K C4069 R4070 .01uF C4011 C4012 C4013 C4010 R4016 3300pF 330pF 3300pF C4064 330pF 3.3K 0.1uF D4007 L4003 R4068 470nH Q4002 C4014 K9V1_UHF_FE...
  • Page 324 4-38 UHF 25-40W Band1 PCB 8486127Z01 / Schematics FL3115 CFWC455F 9180469V04 OUT 2 U3111-1 U3115-4 U3111-4 U3115-1 FL3113 FL3111 9180468v04 9180469V03 CFWC455G CFUCJ455F 1 IN 1 IN CNTL CNTL CNTL CNTL R3153 MC74HC4066 MC74HC4066 MC74HC4066 MC74HC4066 Q3151 9V3_VHF_IF_1 R3151 BWSELECT_VHF_IF_1 BWSELECT 9V3_VHF_IF_2 R3114...
  • Page 325 UHF 25-40W Band1 PCB 8486127Z01 / Schematics 4-39 UHF PCB 8486127Z01 Parts List Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description 25-40W (LDMOS) Part No. Part No. Part No. C4015 2113740F51 100pF C4235 2113741F49 10nF C4410 2113740F51 100pF C4017 2113740F09 1.8pF...
  • Page 326 4-40 UHF 25-40W Band1 PCB 8486127Z01 / Schematics Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Part No. Part No. Part No. Part No. C4492 2111078B42 100pF L3101 2462587T25 620nH Q4003 4813827A07 R4007 0662057A25 C4494 2180464E63...
  • Page 327 0683962T51 Y4262 4886182B01 TCXO 16.8MHZ R4473 0662057A64 4.3K R4474 0662057A97 100K * Motorola Depot Servicing only R4475 0662057B47 Reference designators with an asterisk indicate R4480 0662057A73 components which are not fieldreplaceable R4481 0662057C44 because they need to be calibrated with...

  • Page 328: Uhf 1-25W Pcb 8471224L01 / Schematics

    4-42 UHF 1-25W PCB 8471224L01 / Schematics UHF 1-25W PCB 8471224L01 / Schematics J0451 R4221 C0251 R0257 C4210 R4224 C0212 R4223 FL3114 Y3102 C4231 C4242 R0212 C4245 R0251 R3135 C3143 C4243 R4211 C0252 C4244 C0253 C0262 C3133 C3140 C4246 Q0110 R0261 R0222 C3141...
  • Page 329 UHF 1-25W PCB 8471224L01 / Schematics 4-43 R4418 L4436 L4402 L4437 R4429 U4402 E0631 S5440 R4441 C4440 R4445 R4443 R4442 R4440 VR0601 VR0509 C4413 R4412 VR0504 C4414 C4415 R4411 R0531 C4416 R0541 C0541 R0525 R0174 R0542 C0621 R0530 C4408 C4503 Q0183 C4504 Q0173...
  • Page 330 4-44 UHF 1-25W PCB 8471224L01 / Schematics PASUPVLTG_UHF_PA_1 PASUPVLTG L4402 C4436 C4437 C4405 C4406 57R01 L4436 10uF .033uF 100pF 100pF 57R01 9V3_UHF_PA_1 9V3FLT L4421 57R01 C4421 .033uF U_PREDRIVER U_DRIVER C4439 R4491 100pF C4403 C4423 C4422 L4437 C4402 C4408 9.1pF L4403 C4411 C4412 L4411...
  • Page 331 4-45 UHF 1-25W PCB 8471224L01 / Schematics UHF PCB 8471224L01 Parts List 1-25W Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Part No. Part No. Part No. Circuit Motorola C4013 2113945L37 CAP 3300 PF C4225 2113945L18 CAP 510 PF...
  • Page 332 UHF 1-25W PCB 8471224L01 / Schematics 4-46 Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Part No. Part No. Part No. Part No. C4453 2113944C45 CAP 100 PF 6 ELEMENT CER FLTR L4493 2460592A01 IND 17 NH...
  • Page 333 4-47 UHF 1-25W PCB 8471224L01 / Schematics Circuit Motorola Circuit Motorola Description Description Part No. Part No. * Motorola Depot Servicing only R4303 0613952H36 RES 30 Ohm R4442 0613952H81 RES 2200 Ohm Reference designators with an asterisk indicate R4304 0613952H55...

  • Page 334: Uhf 1-25W Pcb 8471224L03

    4-48 UHF 1-25W PCB 8471224L03 UHF 1-25W PCB 8471224L03 J0451 R4222 R4221 C0251 R0257 C4210 C3145 C0256 C4225 C4221 R4224 C0211 C4289 R0256 C0212 C4213 C4216 R3145 R0252 L4201 R4225 R4223 FL3114 Y3102 U0251 C4226 U0211 C3148 R0211 U3115 C4217 C4231 C4230 R0268...
  • Page 335 UHF 1-25W PCB 8471224L03 4-49 C4207 TP4202 C3146 C3152 D4261 C4262 R4203 C4203 C0205 R0208 C4263 TP4201 R4201 C0255 C0267 R0265 R3152 J0401 R3146 C3147 C4202 R4204 C0492 R0267 R3147 C3151 C0265 C4288 D4201 R0468 R4261 C0497 C0254 R0266 FL3115 C4261 C0202 Q3152...
  • Page 336 4-50 UHF 1-25W PCB 8471224L03 PASUPVLTG_UHF_PA_1 PASUPVLTG C4512 C4511 L4402 .033uF .033uF C4436 C4437 C4405 C4406 57R01 L4436 10uF .033uF 100pF 100pF 57R01 9V3_UHF_PA_1 9V3FLT L4421 57R01 C4513 C4514 .033uF 100uF C4421 .033uF U_PREDRIVER U_DRIVER C4439 R4592 R4491 100pF C4403 C4402 C4408 L4403...
  • Page 337 UHF 1-25W PCB 8471224L03 4-51 5V_UHF_FN_1 5V_UHF_FN_2 IN_5V_RF_REG_UHF_FN_1 4.97 VDC IN_5V_RF_REG (SOURCE) 6.68 VDC C4216 10.87 VDC ADP3300 C4211 C4213 C4215 C4203 .01uF 0.1uF L4201 2.2uF U4211 2.2uF .01uF C4201 390nH C4217 100pF R4224 .01uF 12.7 VDC D4201 C4202 .01uF R4201 R4211 VDDA_UHF_FN_1...
  • Page 338 4-52 UHF 1-25W PCB 8471224L03 C4355 C4352 C4351 C4354 C4353 C4336 R4361 2.2uF 0.1uF 0.1uF 100pF 2.2uF .022uF L4305 390nH C4372 C4371 L4331 R4302 L4304 R4342 L4333 100pF 0.1uF 33nH 390nH 2.2K 390nH C4362 R4305 C4361 0.22uF C4309 C4332 L4332 R4332 R4336 1000pF...
  • Page 339 UHF 1-25W PCB 8471224L03 4-53 R4071 R4061 FECTRL_2_UHF_FE R4072 FECTRL_2 C4062 C4061 0.1uF 330pF Q4004 R4002 9V3_UHF_FE R4062 1.5K C4069 R4070 .01uF C4010 C4011 C4012 C4013 330pF 3300pF 330pF 3300pF C4064 R4016 0.1uF 3.3K D4007 R4068 L4003 1.5K 470nH D4006 K9V1_UHF_FE Q4002 K9V1...
  • Page 340 4-54 UHF 1-25W PCB 8471224L03 WARISMOBILE UHF_IF FL3115 9180469V04 CFWC455F 1 IN MC74HC4066 MC74HC4066 MC74HC4066 FL3111 FL3113 9180468v04 9180469V03 CFWC455G CFUCJ455F OUT 2 OUT 2 CNTL CNTL CNTL CNTL R3153 U3115-4 U3111-1 U3111-4 U3115-1 MC74HC4066 9V3_VHF_IF_1 BWSELECT_VHF_IF_1 R3151 BWSELECT 9V3_VHF_IF_2 MC74HC4066 MC74HC4066 MC74HC4066...
  • Page 341 UHF 1-25W PCB 8471224L03 4-55 UHF PCB 8471224L03 Parts List 1-25W Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Part No. Part No. Part No. Circuit Motorola Description Part No. CAP,FXD,.1UF,+10%,- CAP CER CHP 82.0PF 50V CAP CER CHP 470PF 50V...
  • Page 342 4-56 UHF 1-25W PCB 8471224L03 Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Part No. Part No. Part No. Part No. CAP,FXD,470PF,+5%,- CAP, TANTALUM CHIP, CAP,FXD,.039UF,+10%,- CAP CER CHP 33.0PF 50V C0508 2113945L17 5%,50V-DC,0 C0644 2375194A03...
  • Page 343 UHF 1-25W PCB 8471224L03 4-57 Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Part No. Part No. Part No. Part No. CAP,FXD,1.8PF,.1PF+/-,50V- CAP,FXD,2.2UF,+10%,- CAP,FXD,4.7UF,+10%,- CAP,FXD,6.8PF,.1PF+/-,50V- C4030 2113944C69 DC,0 C4213 2313960C78 10%,20V-DC C4253 2313960B30 10%,10V-DC C4331 2113944M14...
  • Page 344 4-58 UHF 1-25W PCB 8471224L03 Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Part No. Part No. Part No. Part No. CAP CER CHP 100.0PF 50V C4448 2111078B25 CAP CHIP RF 27 5 NPO 100V CAP CER CHP 100.0PF 50V...
  • Page 345 UHF 1-25W PCB 8471224L03 4-59 Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Part No. Part No. Part No. Part No. IDCTR,WW,470NH,5%,490M INDUCTOR BEAD CHIP EPP Q3101 4802197J95 RF TRANSISTOR PBR941 CER CHIP RES 10K OHM 5%...
  • Page 346 4-60 UHF 1-25W PCB 8471224L03 Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Part No. Part No. Part No. Part No. CER CHIP RES 4700 OHM CER CHIP RES 10K OHM 5% CER CHIP RES 0.0 +/-0.050...
  • Page 347 UHF 1-25W PCB 8471224L03 4-61 Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Part No. Part No. Part No. Part No. CER CHIP RES 2400 OHM 5 CER CHIP RES 100 OHM 5% CER CHIP RES 150 OHM 5%...
  • Page 348 4-62 UHF 1-25W PCB 8471224L03 Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Part No. Part No. Part No. Part No. CER CHIP RES 51.0 OHM CER CHIP RES OHM 5% IC, LM2941, TO DROPOUT XTAL 44.395MHZ, 3RD OT,...
  • Page 349 Professional Radio GM Series LB1 (29.6 - 36.0MHz) LB2 (36.0 - 42.0MHz) LB3 (42.0 - 50.0MHz) Service Information Issue: May 2007...
  • Page 350 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 351 Table of Contents Chapter 1 MODEL CHART AND TECHNICAL SPECIFICATIONS 1.0 GM360 Model Chart.....................1-1 2.0 Technical Specifications ..................1-1 Chapter 2 THEORY OF OPERATION 1.0 Introduction ......................2-1 2.0 Low Band Receiver....................2-2 2.1 Receiver Front-End ..................2-2 2.2 Front-End Band-Pass Filters & Pre-Amplifier ..........2-3 2.3 First Mixer and High Intermediate Frequency (IF) .........2-3 2.4 High Intermediate Frequency (IF) and Blanker Switches .......2-3 2.5 Low Intermediate Frequency (IF) and Receiver Back End......2-4...
  • Page 352 Chapter 4 Low Band PCB/SCHEMATICS/PARTS LISTS 1.0 Allocation of Schematics and Circuit Boards ............4-1 1.1 Controller Circuits ....................4-1 2.0 LB1 25-60W PCB 8486206B06 / Schematics ............. 4-5 2.1 LB1 25-60W PCB 8486206B06 Parts List ............4-15 3.0 LB2 25-60W PCB 8486207B05 / Schematics ........... 4-18 3.1 LB2 25-60W PCB 8486207B05 Parts List ............

  • Page 353: Chapter 1 Model Chart And Technical Specifications

    Chapter 1 MODEL CHART AND TECHNICAL SPECIFICATIONS GM360 Model Chart GM Series Low Band 29-50 MHz Model Description MDM25BKF9AN5_E GM360 LB1, 29.0-36.0 MHz, 25-60W, 255 Ch MDM25CKF9AN5_E GM360 LB2, 36.0-42.0 MHz, 25-60W, 255 Ch MDM25DKF9AN5_E GM360 LB3, 42.0-50.0 MHz, 25-60W, 255 Ch Item Description GCN6114_...
  • Page 354 MODEL CHART AND TECHNICAL SPECIFICATIONS Transmitter *Frequencies - Full Bandsplit LB1 29.7-36.0 MHz LB2 36.0-42.0 MHz LB3 42.0-50.0 MHz Channel Spacing 12.5/20/25 kHz 12.5/20/25 kHz 12.5/20/25 kHz Frequency Stability ±5.0 ppm ±5.0 ppm ±5.0 ppm (-30°C to +60°C, +25° Ref.) Power 25-60W 25-60W...

  • Page 355: Chapter 2 Theory Of Operation

    Chapter 2 THEORY OF OPERATION Introduction This Chapter provides a detailed theory of operation for the LowBand circuits in the radio. For details of the theory of operation and trouble shooting for the the associated Controller circuits refer to the Controller Section of this manual.

  • Page 356: Low Band Receiver

    THEORY OF OPERATION Low Band Receiver Receiver Front-End The low band receiver is bandsplit into three ranges depending on radio model, covering frequencies from 29.7 to 36.0 MHz, 36.0 to 42.0 MHz, or 42.0 to 50.0 MHz. The circuitry of the three models is identical except for component value differences.

  • Page 357: Front-End Band-Pass Filters & Pre-Amplifier

    Low Band Receiver There are two 2-pole 10.7 MHz crystal filters in the high-IF section and two switched pairs of 455 kHz ceramic filters in the low-IF section to provide the required adjacent channel selectivity. The second IF at 455 kHz is mixed, amplified and demodulated in the IF IC. The processing of the demodulated audio signal is performed by an audio processing IC located in the controller section.

  • Page 358: Low Intermediate Frequency (If) And Receiver Back End

    THEORY OF OPERATION presented to the high-Q crystal filters FL1102 and FL1103, would cause ringing of the filter response, stretching an otherwise narrow impulse into a long and audible output waveform. Therefore, source follower stage Q1104 isolates the blanker switches from the crystal filters, providing a consistent source impedance via matching network L1106, L1107 and associated components.

  • Page 359: Low Band Transmitter Power Amplifier (Pa) 25-60 W

    Low Band Transmitter Power Amplifier (PA) 25-60 W the AGC input pin 5 of U1601, reducing its gain and therefore the amount of noise pulses which are detected and processed. Low Band Transmitter Power Amplifier (PA) 25-60 W The radio’s 60 W PA is a three-stage amplifier used to amplify the output from the VCO to the radio transmit level.

  • Page 360: Final Stage

    THEORY OF OPERATION MOSBIAS_1 is set during transmit mode by the PCIC pin 24, and fed to the gate of Q1401 via resistors R1402, R1447, R1449, R1458, R1459 and R1463, The bias voltage is tuned in the factory. The circuitry associated with U1402-2 and Q1404 limits the variation in the output power of the driver stage resulting from changes in the input impedance of the final stage due to changes at the antenna of the radio.

  • Page 361: Power Control

    Low Band Transmitter Power Amplifier (PA) 25-60 W Power Control The transmitter uses the Power Control IC (PCIC, U1503) to control the power output of the radio. A differential DC amplifier U1502-1 compares the voltage drop across current-measuring resistor R1409, which is proportional to the transmitter final stage DC current, with the voltage drop across resistor R1508 and R1535, which is proportional to the current through transistor Q1503.

  • Page 362: Low Band Frequency Synthesis

    THEORY OF OPERATION Low Band Frequency Synthesis The frequency synthesizer subsystem consists of the reference oscillator crystal (Y1201), the Low Voltage Fractional-N synthesizer (LVFRAC-N, U1201), and the receive and transmit VCOs and buffers (Q1303 through Q1308 and associated components). Fractional-N Synthesizer The LVFRAC-N synthesizer IC (U1201) consists of a reference oscillator, pre-scaler, a programmable loop divider, control divider logic, a phase detector, a charge pump, an A/D converter for low frequency digital modulation, a balance attenuator to balance the high frequency analog...

  • Page 363: Voltage Controlled Oscillator (Vco)

    Low Band Frequency Synthesis Output LOCK (U1201-4) provides information about the lock status of the synthesizer loop. A high level at this output indicates a stable loop. A buffered output of the 16.8 MHz reference frequency is provided at pin 19. The operating frequency of the synthesizer is loaded serially from the microprocessor via the data line (DATA, U1201-7), clock line (CLK, U1201-8) and chip select line (CSX, U1201-9).
  • Page 364 2-10 THEORY OF OPERATION 1ST RX 2ND RX BUFFER BUFFER RXVCO Q1304 Q1305 Q1303 RXINJ (TO 1ST MIXER) STEERING TO Q1202 LINE 2ND TX 1ST TX PRESCALER BUFFER (VCTRL) BUFFER BUFFER TXVCO Q1307 Q1308 Q1306 TXINJ (TO U1401 PIN16) U1377-8 DC SWITCH RX (TO Q1303-5) SFOUT...
  • Page 365 Low Band Frequency Synthesis 2-11 only by the resistors connected to BIAS 1, BIAS 2, or the internal current source. A settled synthesizer loop is indicated by a high level of signal LOCK (U1201-4). In order to modulate the PLL the two spot modulation method is utilized. Via pin 10 (MODIN) on U1201, the audio signal is applied to both the A/D converter (low frequency path) and the balanced attenuator (high frequency path).
  • Page 366 2-12 THEORY OF OPERATION...

  • Page 367: Troubleshooting Flow Chart For Transmitter

    Chapter 3 LOW BAND TROUBLESHOOTING CHARTS Troubleshooting Flow Chart for Transmitter START No or Low Power Out Check Pressure Pad and/or Safety Switch Circuitry Switch Voltage > 1A < 1A @Drains of CURRENT Q1402 & Q1403 Look for <<18V pp short on RF @ Supply Line...

  • Page 368: Troubleshooting Flow Chart For Receiver (Sheet 1 Of 2)

    Low Band TROUBLESHOOTING CHARTS Troubleshooting Flow Chart for Receiver (Sheet 1 of 2) START Bad SINAD Bad 20dB Quieting No Recovered Audio Audio Check Controller (in the case of no audio). at pin 8 of U1103 Or else go to “B” Spray or inject 10.7MHz into XTAL Filter FL1102.

  • Page 369: Troubleshooting Flow Chart For Receiver (Sheet 2 Of 2)

    Troubleshooting Flow Chart for Receiver Troubleshooting Flow Chart for Receiver (Sheet 2 of 2) Inject RF into J1401 Trace IF signal Signal at signal at from C1036 to pin 2 of Q1106 Q1106. Check for U1051 collector bad XTAL filter. Before replacing U1103, check U1103 voltages.

  • Page 370: Troubleshooting Flow Chart For Synthesizer

    Low Band TROUBLESHOOTING CHARTS Troubleshooting Flow Chart for Synthesizer 5V at Check 5V U1201 pins 5, Start Regulator U1250, 13, 20, 24 & L1201 & R1201 36 ? Visual Check D3201, Correct check of the C3203, C3205, & Problem Board OK C3206 16.8MHz 16.8MHz...

  • Page 371: Troubleshooting Flow Chart For Vco

    Troubleshooting Flow Chart for VCO Troubleshooting Flow Chart for VCO RX - VCO TX - VCO Low or NO RF Signal Low or no RF Signal at Input to PA at U1051 Visual Check Visual Check Correct of Board of Board Problem Make sure Synthesizer is 8.5V DC...
  • Page 372 Low Band TROUBLESHOOTING CHARTS...
  • Page 373 Chapter 4 LOW BAND PCB/SCHEMATICS/PARTS LISTS Allocation of Schematics and Circuit Boards Controller Circuits The Low Band circuits are contained on the printed circuit board (PCB) which also contains the Controller circuits. This Chapter shows the schematics for the Low Band circuits only, refer to the Controller section for details of the related Controller circuits .
  • Page 374 Low band pcb/schematics/parts lists Table 4-3 LB3 25-60W Diagrams and Parts Lists PCB : 8485908Z03 Main Board Top Side Page 4-31 8485908Z03 Main Board Bottom Side Page 4-32 SCHEMATICS Power Amplifier 25-60W (Sheet 1 of 2) Page 4-33 Power Amplifier 25-60W (Sheet 2 of 2) Page 4-34 Voltage Controlled Oscillator Page 4-35...
  • Page 375 Allocation of Schematics and Circuit Boards Table 4-6 LB3 25-60W Diagrams and Parts Lists PCB : 8485908Z04 Main Board Top Side Page 4-56 8485908Z04 Main Board Bottom Side Page 4-57 Parts List 8485908Z04 Page 4-58 Controller version is T11 Table 4-7 LB3 25-60W Diagrams and Parts Lists PCB : 8486908Z02 Main Board Top Side Page 4-61...
  • Page 376 Low band pcb/schematics/parts lists...
  • Page 377 LB Range1, 25-60W PCB 8486206B06 / Schematics LB Range1, 25-60W PCB 8486206B06 / Schematics J0451 C0251 C0255 C0211 R0256 L1107 GNDB GNDA C1024 C0212 C0256 Y1101 C0254 R1131 L1008 R0252 R1113 R0269 C1131 C0105 R 0212 C0121 C1145 R1136 R1122 C1129 Q1102 R0211...
  • Page 378 LB Range1, 25-60W PCB 8486206B06 / Schematics C1120 R0255 R0266 R0268 R0257 C1114 R1111 J0401 R0267 R0208 C1152 R1139 L1108 C0266 C0267 C0492 C0205 C1116 C1119 R0265 L1106 U0653 C1115 R1121 R1115 R0206 C0265 R0204 L1009 C1113 R1116 C0491 R1119 TP0222 R0203 U0652...
  • Page 379 LB Range1, 25-60W PCB 8486206B06 / Schematics C1457 RXIN_PA_1 PASUPVLTG_PA_1 RXIN PASUPVLTG PASUPVLTG .01uF R1410 R1481 C1435 C1436 C1456 .01uF D1402 TSENSE 2Vdc L1420 100pF MOSBIAS_2_SW C1458 C1485 250.974nH 10uF TP1402 .01uF L1419 C1445 27uH .01uF R1409 C1447 R1465 R1407 L1421 L1422 L1423...
  • Page 380 LB Range1, 25-60W PCB 8486206B06 / Schematics 0.825V TP1505 TEMPSENSE_PA_1 TEMPSENSE 9T1_PA_1 K9V1_PA_1 K9V1 Q1501 CSX_PA_1 R1501 R1522 DATA_PA_1 DATA CLK_PA_1 9V3_PA_1 R1504 Q1502 RESET_PA_1 RESET C1501 PCIC_MOSBIAS_1 FECNTL_1_PA_1 C1502 FECNTL_1 2200pF 2200pF FECNTL_2_PA_1 R1503 R1502 FECNTL_2 3.3K C1509 GND2 VG 15 V10 14 BPOS...
  • Page 381 LB Range1, 25-60W PCB 8486206B06 / Schematics U1377 U1378 0VDC (R) TRB_VCO_1 4.7VDC (T) TX_8.5V VSF_VCO_1 R1376 4.7K C1307 L1307 L1305 8.5VDC (R) 47pF 27uH 8.2VDC (R) 27uH R1308 0VDC (T) CR1306 C1308 C1312 L1309 C1306 R1312 Q1303 C1317 4.7pF .01uF C1318 16pF...
  • Page 382 4-10 LB Range1, 25-60W PCB 8486206B06 / Schematics Q1003 9.03VDC (R) R1007 R1006 MMBT3906 9V3_FE_1 4.00VDC 9.14VDC 0VDC (T) 8.2K U1001 UMC5N C1031 Q1002 R1005 0.1uF MMBT3906 0VDC (R) 9T1_FE_1 9.1VDC (T) 1.47VDC 4.60VDC 8.36VDC (R) 9.1VDC (T) C1028 R1004 C1030 .01uF C1029...
  • Page 383 LB Range1, 25-60W PCB 8486206B06 / Schematics 4-11 BLNKR_SWITCH_IF_1 R1114 BLNKR_SWITCH 4.3K R1113 4.3K 9V3_IF_1 9V3_IF_2 R1106 R1108 3.3K 5.94 V R1110 C1108 C1105 R1107 0.1uF 0.1uF 6.2K L1110 33uH FL1102 Q1102 L1105 C1113 L1104 FILTER Q1103 6.8uH 0.1uF 6.8uH R1104 NOISE_BLNKR_IF1_IF_1 8.2K...
  • Page 384 4-12 LB Range1, 25-60W PCB 8486206B06 / Schematics FL1104 FL1106 CFUCJ455F U1102-3 CFWC455F U1102-2 U1101-3 U1101-2 MC74HC4066 MC74HC4066 MC74HC4066 MC74HC4066 OUT 2 1 IN CNTL CNTL CNTL CNTL R1129 Q1105 R1128 C1139 R1124 R1125 R1126 R1127 .01uF FN0:NP FN0:NP FN0:NP FN0:NP FL1105 FL1107...
  • Page 385 LB Range1, 25-60W PCB 8486206B06 / Schematics 4-13 Q1601 9V3_NOISE_BLNKR_1 9V3_NOISE_BLNKR_2 C1601 0.1uF R1601 R1602 L1604 Q1602 4.7K 47uH NOISE_BLNKR_NOISE_BLNKR_1 NOISE_BLNKR R1635 L1601 C1632 47uH 0.1uF C1605 C1611 R1611 10uF 0.1uF R1608 R1614 R1610 2.2K R1605 R1607 L1602 C1631 C1628 C1607 R1615 330K...
  • Page 386 4-14 LB Range1, 25-60W PCB 8486206B06 / Schematics Y1202 16.8MHz TTS05V FN0:NP C1252 .018uF VCNTL R1222 U1250 Comment: The NOISE_BLNKR line is required because it LP2951 IN_5V_RF_REG_FRACN_1 5V_FRACN_1 5V_FRACN_2 FN0:NP is routed through the FracN from the Controller. IN_5V_RF_REG INPUT OUTPUT 7 FEEDBACK C1251...

  • Page 387: Lb1 25-60W Pcb 8486206B06 Parts List

    LB Range1, 25-60W PCB 8486206B06 / Schematics 4-15 LB1 PCB 8486206B06 Parts List Circuit Motorola Part Circuit Motorola Part Circuit Motorola Part Description Description Description C1115 2113740F53 120pF C1250 2311049A09 2.2uF C1424 2113741A45 .01uF Circuit Motorola Part C1116 2113740F41 39pF...
  • Page 388 4-16 LB Range1, 25-60W PCB 8486206B06 / Schematics Circuit Motorola Part Circuit Motorola Part Circuit Motorola Part Circuit Motorola Part Description Description Description Description C1482 2113928E01 CR1310 4805649Q14 HN1V02H L1313 2408382D19 491nH Q1502 4813824A10 MMBT3904 C1484 2113741F33 2200pF CR1314 4880154K03...
  • Page 389 NOTPLACED R1307 0662057A19 R1442 0662057A25 R1537 0662057A53 1.5K R1308 0662057A19 R1443 0662057A49 R1541 0662057A53 1.5K * Motorola Depot Servicing only R1309 0662057A41 R1444 0662057A33 R1542 0662057A49 R1311 0662057A73 R1445 0662057A68 6.2K R1543 0662057A49 Reference designators with an asterisk indicate R1312 0662057A51 1.2K...
  • Page 390 4-18 LB Range2, 25-60W PCB 8486207B05 / Schematics LB Range2, 25-60W PCB 8486207B05 / Schematics J0451 C0251 C0255 R0256 C0211 L1107 GNDB GNDA C0254 C1024 C0212 C0256 Y1101 R1131 R0252 L1008 U0251 R1113 U0211 R0269 C1131 C0121 R0212 C0261 R1136 R1122 C1129 Q1102...
  • Page 391 LB Range2, 25-60W PCB 8486207B05 / Schematics 4-19 R0255 R0268 R0266 R0257 R1111 C1152 J0401 C1114 C1120 R0208 R1139 R0267 L1108 C0267 C0492 R0206 C1116 C1119 C0205 R0265 U0653 L1106 C1115 R1121 R1115 C0266 TP0222 C0265 C0202 L1009 C1113 R1116 C0491 R1119 R0203...
  • Page 392 4-20 LB Range2, 25-60W PCB 8486207B05 / Schematics C1457 RXIN_PA_1 RXIN C1456 .01uF D1402 L1420 75pF PASUPVLTG_PA_1 196.876nH PASUPVLTG PASUPVLTG R1410 C1435 C1436 C1458 2 Vdc .01uF MOSBIAS_2_SW 10uF C1445 L1419 27uH .01uF 1.8V-2.2V R1409 L1423 L1421 L1422 TP1402 C1447 150.499nH 133.304nH 78.727nH...
  • Page 393 LB Range2, 25-60W PCB 8486207B05 / Schematics 4-21 0.825V TP1505 TEMPSENSE_PA_1 TEMPSENSE 9T1_PA_1 K9V1_PA_1 K9V1 Q1501 CSX_PA_1 R1501 DATA_PA_1 R1522 DATA CLK_PA_1 9V3_PA_1 R1504 Q1502 RESET_PA_1 RESET C1501 PCIC_MOSBIAS_1 FECNTL_1_PA_1 C1502 FECNTL_1 2200pF 2200pF FECNTL_2_PA_1 R1503 R1502 FECNTL_2 3.3K C1509 GND2 LM50 BPOS...
  • Page 394 4-22 LB Range2, 25-60W PCB 8486207B05 / Schematics U1377 U1378 0VDC (R) TRB_VCO_1 4.7VDC (T) TX_8.5V VSF_VCO_1 R1376 4.7K L1305 8.5VDC (R) C1307 8.2VDC (R) 27uH R1308 L1307 0VDC (T) 27uH C1318 24pF CR1306 C1308 C1306 C1312 R1312 Q1303 -2.2VDC (R) .01uF 4.7pF C1317...
  • Page 395 LB Range2, 25-60W PCB 8486207B05 / Schematics 4-23 Q1003 9.03VDC (R) MMBT3906 9V3_FE_1 R1007 R1006 0VDC (T) 4.05VDC 9.14VDC 8.2K U1001 UMC5N C1031 R1005 0.1uF Q1002 0VDC (R) 9T1_FE_1 MMBT3906 4.64VDC 9.1VDC (T) 1.33VDC 8.36VDC (R) C1028 R1004 9.1VDC (T) C1030 .01uF 2.7K...
  • Page 396 4-24 LB Range2, 25-60W PCB 8486207B05 / Schematics BLNKR_SWITCH_IF_1 R1114 BLNKR_SWITCH 4.3K R1113 4.3K 9V3_IF_1 9V3_IF_2 R1106 R1108 3.3K 5.94 V R1110 C1108 C1105 R1107 0.1uF 0.1uF 6.2K L1110 33uH FL1102 Q1102 L1105 C1113 L1104 FILTER Q1103 6.8uH 6.8uH 0.1uF R1104 NOISE_BLNKR_IF1_IF_1 8.2K...
  • Page 397 LB Range2, 25-60W PCB 8486207B05 / Schematics 4-25 FL1104 FL1106 CFUCJ455F U1102-3 CFWC455F U1102-2 U1101-3 U1101-2 MC74HC4066 MC74HC4066 MC74HC4066 MC74HC4066 OUT 2 1 IN CNTL CNTL CNTL CNTL R1129 Q1105 R1128 C1139 R1124 R1125 R1126 R1127 .01uF FN0:NP FN0:NP FN0:NP FN0:NP FL1105 FL1107...
  • Page 398 4-26 LB Range2, 25-60W PCB 8486207B05 / Schematics Q1601 9V3_NOISE_BLNKR_1 9V3_NOISE_BLNKR_2 C1601 0.1uF R1601 R1602 L1604 Q1602 4.7K NOISE_BLNKR_NOISE_BLNKR_1 47uH NOISE_BLNKR R1635 L1601 C1632 47uH 0.1uF C1605 C1611 R1611 10uF 0.1uF R1608 R1614 R1610 2.2K R1605 R1607 C1631 C1628 L1602 C1607 330K 750K...
  • Page 399 LB Range2, 25-60W PCB 8486207B05 / Schematics 4-27 Y1202 16.8MHz TTS05V C1252 FN0:NP .018uF VCNTL U1250 LP2951 IN_5V_RF_REG_FRACN_1 5V_FRACN_1 5V_FRACN_2 R1222 IN_5V_RF_REG INPUT OUTPUT 7 FEEDBACK ERROR FN0:NP C1254 C1250 C1251 C1253 SHUTDOWN SENSE .01uF 2.2uF 0.1uF 4.7uF 5V_TAP C1233 .01uF C1234 FN0:NP...

  • Page 400: Lb2 25-60W Pcb 8486207B05 Parts List

    4-28 LB Range2, 25-60W PCB 8486207B05 / Schematics LB2 PCB 8486207B05 Parts List Circuit Motorola Part Circuit Motorola Part Circuit Motorola Part Description Description Description C1113 2113743E20 0.1uF C1229 2113741F49 .01uF C1413 2113741A45 .01uF Circuit Motorola Part Description C1114 2113743E20 0.1uF...
  • Page 401 LB Range2, 25-60W PCB 8486207B05 / Schematics 4-29 Circuit Motorola Part Circuit Motorola Part Circuit Motorola Part Circuit Motorola Part Description Description Description Description C1470 2113741W01 C1622 2113743E20 0.1uF L1201 2480289M17 27uH Q1101 4813827A07 MMBR941 C1471 2113741A45 .01uF C1623 2113740F60...
  • Page 402 NOTPLACED R1311 0662057A73 R1447 0662057B47 R1544 0662057A49 R1312 0662057A51 1.2K R1449 0611079A64 R1545 0662057A65 4.7K * Motorola Depot Servicing only R1313 0662057A51 1.2K R1450 0683962T71 R1601 0662057A73 Reference designators with an asterisk indicate R1314 0662057A37 R1453 - R1602 0662057A65 4.7K...
  • Page 403 LB Range3, 25-60W PCB 8485908Z03 / Schematics 4-31 LB Range3, 25-60W PCB 8485908Z03 / Schematics J0451 R0256 C0212 L1107 GNDB GNDA C0256 Y1101 U0251 L1008 U0211 R1113 R0269 C1131 C0261 R1136 R1122 Q1102 R0212 C1145 C1130 R1011 R0251 R0261 R1114 C1020 C1129 C1125...
  • Page 404 4-32 LB Range3, 25-60W PCB 8485908Z03 / Schematics L1108 R0255 R0266 R0268 R1139 R1111 C1152 R0208 J0401 C1114 C0267 C0492 L1106 C0205 R0265 U0653 C1115 R1115 C0265 L1009 R1116 C1113 U0652 Q1104 C1151 TP0222 R0204 C1150 R1138 TP0221 R0202 C1112 C1121 C0201 R0107...
  • Page 405 LB Range3, 25-60W PCB 8485908Z03 / Schematics 4-33 C1457 RXIN_PA_1 PASUPVLTG_PA_1 RXIN PASUPVLTG PASUPVLTG .01uF R1410 MOSBIAS_2_SW C1435 C1436 C1456 D1402 .01uF C1458 L1420 51pF 10uF 172.891nH L1419 C1445 .01uF 27uH 1.8V-2.1V R1409 FN0:NP TP1402 C1447 L1421 L1422 L1423 MOSBIAS_2_PA_1 R1465 R1407 137.876nH...
  • Page 406 4-34 LB Range3, 25-60W PCB 8485908Z03 / Schematics 0.825V TP1505 TEMPSENSE_PA_1 TEMPSENSE 9T1_PA_1 K9V1_PA_1 K9V1 Q1501 CSX_PA_1 R1501 R1522 DATA_PA_1 C1523 DATA 0.1uF CLK_PA_1 9V3_PA_1 R1504 Q1502 RESET_PA_1 RESET C1501 PCIC_MOSBIAS_1 FECNTL_1_PA_1 C1502 FECNTL_1 2200pF 2200pF FECNTL_2_PA_1 R1502 R1503 FECNTL_2 3.3K C1509 GND2...
  • Page 407 LB Range3, 25-60W PCB 8485908Z03 / Schematics 4-35 U1377 U1378 0VDC (R) TRB_VCO_1 4.7VDC (T) TX_8.5V VSF_VCO_1 R1376 4.7K L1307 C1307 8.5VDC (R) L1305 R1308 18uH 8.2VDC (R) 0VDC (T) 18uH 13pF CR1306 C1312 R1312 L1309 C1306 C1308 .01uF Q1303 1.2K 16pF -2.4VDC (R)
  • Page 408 4-36 LB Range3, 25-60W PCB 8485908Z03 / Schematics 9.03VDC (R) R1007 R1006 Q1003 9V3_FE_1 4.00VDC 0VDC (T) 9.14VDC 8.2K U1001 UMC5N C1031 R1005 0.1uF Q1002 0VDC (R) 9T1_FE_1 1.47VDC 4.60VDC 9.1VDC (T) 8.36VDC (R) C1028 9.1VDC (T) R1004 .01uF C1030 C1029 2.7K 0.1uF...
  • Page 409 LB Range3, 25-60W PCB 8485908Z03 / Schematics 4-37 BLNKR_SWITCH_IF_1 R1114 BLNKR_SWITCH 4.3K R1113 4.3K 9V3_IF_1 9V3_IF_2 R1106 R1108 3.3K 5.94 V R1110 C1108 C1105 R1107 0.1uF 0.1uF 6.2K L1110 33uH FL1102 Q1102 L1105 C1113 L1104 FILTER Q1103 6.8uH 6.8uH 0.1uF R1104 NOISE_BLNKR_IF1_IF_1 8.2K...
  • Page 410 4-38 LB Range3, 25-60W PCB 8485908Z03 / Schematics FL1104 FL1106 CFWC455F U1101-3 CFUCJ455F U1101-2 U1102-3 U1102-2 MC74HC4066 MC74HC4066 MC74HC4066 MC74HC4066 OUT 2 1 IN CNTL CNTL CNTL CNTL R1129 Q1105 R1128 C1139 R1124 R1125 R1126 R1127 .01uF FN0:NP FN0:NP FN0:NP FN0:NP FL1105 FL1107...
  • Page 411 LB Range3, 25-60W PCB 8485908Z03 / Schematics 4-39 Q1601 9V3_NOISE_BLNKR_1 9V3_NOISE_BLNKR_2 C1601 0.1uF R1601 R1602 L1604 Q1602 4.7K NOISE_BLNKR_NOISE_BLNKR_1 47uH NOISE_BLNKR R1635 C1632 L1601 47uH 0.1uF C1605 C1611 R1611 10uF 0.1uF R1608 R1614 R1610 2.2K R1605 R1607 L1602 C1631 C1628 C1607 330K 750K...
  • Page 412 4-40 LB Range3, 25-60W PCB 8485908Z03 / Schematics Y1202 16.8MHz TTS05V FN0:NP C1252 .018uF VCNTL Comment: The NOISE_BLNKR line is required because it is routed through the FracN from the Controller. R1222 U1250 FN0:NP LP2951 IN_5V_RF_REG_FRACN_1 5V_FRACN_1 5V_FRACN_2 IN_5V_RF_REG INPUT OUTPUT NOISE_BLNKR_FRACN_1 NOISE_BLNKR_FRACN_2...

  • Page 413: Lb3 25-60W Pcb 8485908Z03 Parts List

    LB Range3, 25-60W PCB 8485908Z03 / Schematics 4-41 LB3 PCB 8485908Z03 Parts List Circuit Motorola Part Circuit Motorola Part Circuit Motorola Part Description Description Description C1126 2113743E20 0.1uF C1308 2113740F19 4.7pF C1432 2113741W01 Circuit Motorola Part C1127 2311049A57 10uF C1311 2113741F49 .01uF...
  • Page 414 4-42 LB Range3, 25-60W PCB 8485908Z03 / Schematics Circuit Motorola Part Circuit Motorola Part Circuit Motorola Part Circuit Motorola Part Description Description Description Description C1504 2113741F33 2200pF D1501 4880236E05 MMBD301 L1321 2462587N58 270nH Q1602 4880048M01 DTC144EKA C1505 2113741F25 1000pF D1502...
  • Page 415 Y1202 NOTPLACED R1308 0662057A19 R1442 0662057A25 R1537 0662057A90 R1309 0662057A41 R1443 0662057A49 R1541 0662057A68 6.2K * Motorola Depot Servicing only R1311 0662057A73 R1444 0662057A33 R1542 0662057A49 Reference designators with an asterisk indicate R1312 0662057A51 1.2K R1445 0662057A68 6.2K R1543 0662057A49...
  • Page 416 4-44 LB Range1, 25-60W PCB 8486206B08 / Schematics LB Range1, 25-60W PCB 8486206B08 / Schematics J0451 C0251 C0255 C0211 R0256 L1107 GNDB GNDA C1024 C0212 C0254 U0251 R0252 C0256 Y1101 R1131 R0211 L1008 R1113 U0211 R0212 R0269 C1131 C0121 C0261 C1145 R1136 R1122...
  • Page 417 LB Range1, 25-60W PCB 8486206B08 / Schematics 4-45 J0401 R0255 C1120 R0266 R0268 R0267 R0257 C1114 R1111 C1152 R0208 R1139 L1108 C1116 R0206 C0266 C0267 C0492 C0205 C1119 R0265 L1106 C1115 R1115 R1121 R0203 TP0222 C0202 C1151 L1009 C1113 R1116 C0491 R0204 R1119...
  • Page 418 4-46 LB Range1, 25-60W PCB 8486206B08 / Schematics BLNKR_SWITCH_IF_1 R1114 BLNKR_SWITCH 4.3K R1113 4.3K 9V3_IF_1 9V3_IF_2 R1108 R1106 3.3K 5.94V R1110 C1105 C1108 R1107 0.1uF 0.1uF 6.2K L1110 Q1103 Q1102 33uH FL1102 L1105 L1104 FILTER C1113 6.8uH 6.8uH 0.1uF L1103 GND1 6.40V GND2...
  • Page 419 LB Range1, 25-60W PCB 8486206B08 / Schematics 4-47 FL1106 U1101-3 FL1104 U1101-2 U1102-3 CFWC455F U1102-2 MC74HC4066 CFUCJ455F MC74HC4066 MC74HC4066 MC74HC4066 1 IN OUT 2 CNTL CNTL CNTL CNTL R1129 R1128 Q1105 C1139 R1125 R1126 R1127 .01uF R1124 FN0:NOTPLACED FN0:NOTPLACED FN0:NOTPLACED FN0:NOTPLACED U1101-4 FL1105...

  • Page 420: Lb1 25-60W Pcb 8486206B08 Parts List

    4-48 LB Range1, 25-60W PCB 8486206B08 / Schematics LB1 PCB 8486206B08 Parts List Circuit Motorola Part Circuit Motorola Part Circuit Motorola Part Description Description Description Circuit Motorola Part Description C1112 2113740F40 CAP, 36pF C1222 2113740F37 CAP, 27pF C1407 2113741A45 CAP, .01uF...
  • Page 421 LB Range1, 25-60W PCB 8486206B08 / Schematics 4-49 Circuit Motorola Part Circuit Motorola Part Circuit Motorola Part Circuit Motorola Part Description Description Description Description C1470 2113741W01 CAP, 1uF C1625 2113740F29 CAP, 12pF L1206 2480289M17 IDCTR, 27uH Q1106 4813827A07 MMBR941 C1471 2113741A45 CAP, .01uF...
  • Page 422 R1544 0662057A90 RES, 51K R1315 0662057A61 RES, 3.3K R1453 0662057K31 RES, 180 R1545 0662057A65 RES, 4.7K * Motorola Depot Servicing only R1316 0662057A45 RES, 680 R1454 0662057K31 RES, 180 R1601 0662057A73 RES, 10K Reference designators with an asterisk indicate R1317...
  • Page 423 LB Range2, 25-60W PCB 8486207B07 / Schematics 4-51 LB Range2, 25-60W PCB 8486207B07 / Schematics C0251 C0255 J0451 C0211 R0256 L1107 C0254 GNDB GNDA C0212 Y1101 C1024 R0211 C0256 R1131 U0251 R0252 L1008 R1113 U0211 R0269 C0105 C1131 C0121 C1145 R1136 R1122 C1129...
  • Page 424 4-52 LB Range2, 25-60W PCB 8486207B07 / Schematics LB3 PCB 8485908Z03 Parts List J0401 C1120 R0255 R0266 R0268 R0267 R0257 C1114 R1111 R0208 R1139 C1152 L1108 C1119 C0492 R0206 C0266 C0267 C1116 R1121 R0265 L1106 C1115 C0205 R0203 R1115 TP0222 C0202 L1009 C1113...

  • Page 425: Lb2 25-60W Pcb 8486207B07 Parts List

    LB Range2, 25-60W PCB 8486207B07 / Schematics 4-53 LB2 PCB 8486207B07 Parts List Circuit Motorola Part Circuit Motorola Part Circuit Motorola Part Description Description Description Circuit Motorola Part Description C1114 2113743E20 CAP, 0.1uF C1230 2113741F49 CAP, .01uF C1414 2113741A45 CAP, .01uF...
  • Page 426 4-54 LB Range2, 25-60W PCB 8486207B07 / Schematics Circuit Motorola Part Circuit Motorola Part Circuit Motorola Part Circuit Motorola Part Description Description Description Description C1471 2113741A45 CAP, .01uF C1626 2113740F59 CAP, 220pF L1206 2480289M17 IDCTR, 27uH Q1106 4813827A07 MMBR941 C1472 2113741M69 CAP, 0.1uF...
  • Page 427 R1544 0662057A90 RES, 51K R1314 0662057A37 RES, 330 R1450 0683962T71 RES, 820 R1545 0662057A65 RES, 4.7K * Motorola Depot Servicing only R1315 0662057A61 RES, 3.3K R1453- R1601 0662057A73 RES, 10K Reference designators with an asterisk indicate R1316 0662057A45 RES, 680...
  • Page 428 4-56 LB Range3, 25-60W PCB 8486908Z04 / Schematics LB Range3, 25-60W PCB 8486908Z04 / Schematics J0451 C0255 C0251 C0211 R0256 L1107 GNDB GNDA C0254 C0212 C1024 C0256 Y1101 R1131 U0251 R0252 R0211 U0211 L1008 R1113 C1131 R0269 C0105 R 0212 C0121 R1122 Q1102...
  • Page 429 LB Range3, 25-60W PCB 8486908Z04 / Schematics 4-57 C1120 R0255 R0266 R0268 R0267 J0401 R0257 C1114 R1111 C1152 R0208 R1139 L1108 C1116 C1119 R0206 C0267 C0492 C0205 R1121 C0266 R0265 L1106 C1115 R1115 R0203 TP0222 C0202 L1009 C1113 R1119 R1116 C0491 R0204 U0652...
  • Page 430 4-58 LB Range3, 25-60W PCB 8486908Z04 / Schematics LB3 PCB 8485908Z04 Parts List Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Part No. Part No. Part No. C1119 2113743E20 CAP, 0.1uF C1252 2113743E05 CAP, .018uF C1420 2113741A45 CAP, .01uF...
  • Page 431 LB Range3, 25-60W PCB 8486908Z04 / Schematics 4-59 Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Part No. Part No. Part No. Part No. C1476 2113741M69 CAP, 0.1uF C1629 2113740F39 CAP, 33pF L1305 2480289M15 IDCTR, 18uH...
  • Page 432 R1544 0662057A90 RES, 51K R1316 0662057A45 RES, 680 R1453 0662057K31 RES, 180 R1545 0662057A65 RES, 4.7K * Motorola Depot Servicing only R1317 0662057A09 RES, 22 R1454 0662057K31 RES, 180 R1601 0662057A73 RES, 10K Reference designators with an asterisk indicate R1318...
  • Page 433 LB Range3, 25-60W PCB 8486908Z02 / Schematics 4-61 LB Range3, 25-60W PCB 8486908Z02 / Schematics MEDIA & COMMUNICATIONS DEPT. WARIS Mobile LoBand DWG. NO. FL0830651 Range 3 8485908Z02.P2 ILLUSTRATOR DATE ENGINEER DATE PROGRAM DISK CHECK 2/16/01 Illustrator O.K. AS IS EDITOR DATE CHECKER...
  • Page 434 4-62 LB Range3, 25-60W PCB 8486908Z02 / Schematics MEDIA & COMMUNICATIONS DEPT. WARIS Mobile LoBand DWG. NO. FL0830652 Range 3 8485908Z02.P2 ILLUSTRATOR DATE ENGINEER DATE PROGRAM DISK CHECK 2/16/01 Illustrator O.K. AS IS EDITOR DATE CHECKER DATE CORRECTED O.K. AS MARKED MARKED ISS.
  • Page 435 LB Range3, 25-60W PCB 8486908Z02 / Schematics 4-63 MEDIA & COMMUNICATIONS DEPT. WARIS Mobile Low Band DWG. NO. Range 3 (42-50 MHz) FL0830695 Power Amplifier Sheet 1 of 2 ILLUSTRATOR DATE ENGINEER DATE PROGRAM DISK CHECK 3/28/01 Illustrator O.K. AS IS EDITOR DATE CHECKER...
  • Page 436 4-64 LB Range3, 25-60W PCB 8486908Z02 / Schematics MEDIA & COMMUNICATIONS DEPT. WARIS Mobile Low Band DWG. NO. Range 3 (42-50 MHz) FL0830696 Power Amplifier Sheet 2 of 2 ILLUSTRATOR DATE ENGINEER DATE PROGRAM DISK CHECK 3/28/01 Illustrator O.K. AS IS EDITOR DATE CHECKER...
  • Page 437 LB Range3, 25-60W PCB 8486908Z02 / Schematics 4-65 MEDIA & COMMUNICATIONS DEPT. WARIS Mobile Low Band DWG. NO. Range 3 (42-50 MHz) FL0830694 Voltage Controlled Oscillator ILLUSTRATOR DATE ENGINEER DATE PROGRAM DISK CHECK 3/28/01 Illustrator O.K. AS IS EDITOR DATE CHECKER DATE CORRECTED...
  • Page 438 4-66 LB Range3, 25-60W PCB 8486908Z02 / Schematics MEDIA & COMMUNICATIONS DEPT. WARIS Mobile Low Band DWG. NO. Range 3 (42-50 MHz) FL0830697 Receiver Front End ILLUSTRATOR DATE ENGINEER DATE PROGRAM DISK CHECK 3/28/01 Illustrator O.K. AS IS EDITOR DATE CHECKER DATE CORRECTED...
  • Page 439 LB Range3, 25-60W PCB 8486908Z02 / Schematics 4-67 MEDIA & COMMUNICATIONS DEPT. WARIS Mobile Low Band DWG. NO. Range 1/2/3 (29.7-36.0/36-42/ FL0830690 42-50 MHz) IF Sheet 1 of 2 ILLUSTRATOR DATE ENGINEER DATE PROGRAM DISK CHECK 3/28/01 Illustrator O.K. AS IS EDITOR DATE CHECKER...
  • Page 440 4-68 LB Range3, 25-60W PCB 8486908Z02 / Schematics MEDIA & COMMUNICATIONS DEPT. WARIS Mobile Low Band DWG. NO. FL0830691 Range 1/2/3 (29.7-36.0/36-42/ 42-50 MHz) IF Sheet 2 of 2 ILLUSTRATOR DATE ENGINEER DATE PROGRAM DISK CHECK 3/28/01 Illustrator O.K. AS IS EDITOR DATE CHECKER...
  • Page 441 LB Range3, 25-60W PCB 8486908Z02 / Schematics 4-69 MEDIA & COMMUNICATIONS DEPT. WARIS Mobile Low Band DWG. NO. FL0830692 Range 1/2/3 (29.7-36.0/36-42/ 42-50 MHz) Noise Blanker ILLUSTRATOR DATE ENGINEER DATE PROGRAM DISK CHECK 3/28/01 Illustrator O.K. AS IS EDITOR DATE CHECKER DATE CORRECTED...
  • Page 442 4-70 LB Range3, 25-60W PCB 8486908Z02 / Schematics MEDIA & COMMUNICATIONS DEPT. WARIS Mobile Low Band Range DWG. NO. 1/2/3 (29.7-36.0/36-42/ FL0830680 42-50 MHz) Audio ILLUSTRATOR DATE ENGINEER DATE PROGRAM DISK CHECK 3/28/01 Illustrator O.K. AS IS EDITOR DATE CHECKER DATE CORRECTED O.K.
  • Page 443 LB Range3, 25-60W PCB 8486908Z02 / Schematics 4-71 MEDIA & COMMUNICATIONS DEPT. WARIS Mobile Low Band DWG. NO. Range 1/2/3 (29.7-36.0/36-42/ FL0830679 42-50 MHz) Supply Voltage ILLUSTRATOR DATE ENGINEER DATE PROGRAM DISK CHECK 3/28/01 Illustrator O.K. AS IS EDITOR DATE CHECKER DATE CORRECTED...
  • Page 444 4-72 LB Range3, 25-60W PCB 8486908Z02 / Schematics MEDIA & COMMUNICATIONS DEPT. WARIS Mobile Low Band DWG. NO. Range 3 (42-50 MHz) Controller FL0830684 R0101 R0102 4.7K ILLUSTRATOR DATE ENGINEER DATE PROGRAM DISK CHECK 3/28/01 Illustrator O.K. AS IS EDITOR DATE CHECKER DATE...
  • Page 445 LB Range3, 25-60W PCB 8486908Z02 / Schematics 4-73 MEDIA & COMMUNICATIONS DEPT. WARIS Mobile Low Band DWG. NO. Range 3 (42-50 MHz) FL0830693 Synthesizer FRACN ILLUSTRATOR DATE ENGINEER DATE PROGRAM DISK CHECK 3/28/01 Illustrator O.K. AS IS EDITOR DATE CHECKER DATE CORRECTED O.K.
  • Page 446 4-74 LB Range3, 25-60W PCB 8486908Z02 / Schematics MEDIA & COMMUNICATIONS DEPT. WARIS Mobile Low Band DWG. NO. Range 3 (42-50 MHz) IO FL0830682 ILLUSTRATOR DATE ENGINEER DATE PROGRAM DISK CHECK 3/28/01 Illustrator O.K. AS IS EDITOR DATE CHECKER DATE CORRECTED O.K.
  • Page 447 LB Range3, 25-60W PCB 8486908Z02 / Schematics 4-75 LB3 PCB 8486908Z02 Parts List Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Part No. Part No. Part No. Circuit Motorola Description Part No. C0255 2113743E20 CAP, 0.1uF C0488 2113743L09 CAP, 470pF...
  • Page 448 4-76 LB Range3, 25-60W PCB 8486908Z02 / Schematics Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Part No. Part No. Part No. Part No. C1103 2113740F58 CAP, 200pF C1203 2113741F49 CAP, .01uF C1318 2113741F49 CAP, .01uF...
  • Page 449 LB Range3, 25-60W PCB 8486908Z02 / Schematics 4-77 Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Part No. Part No. Part No. Part No. C1470 2113741W01 CAP, 1uF C1613 2113740F54 CAP, 130pF FL1104 9180468V04 CFUCJ455F L1307...
  • Page 450 4-78 LB Range3, 25-60W PCB 8486908Z02 / Schematics Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Part No. Part No. Part No. Part No. Q0271 4813824A10 MMBT3904 R0111 0662057B47 RES, 0 R0251 0662057A89 RES, 47K R0612 0662057A65 RES, 4.7K...
  • Page 451 LB Range3, 25-60W PCB 8486908Z02 / Schematics 4-79 Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Part No. Part No. Part No. Part No. R1129 0662057A73 RES, 10K R1328 0662057A41 RES, 470 R1448 NOT PLACED R1518 0662057A61 RES, 3.3K...
  • Page 452 4-80 LB Range3, 25-60W PCB 8486908Z02 / Schematics Circuit Motorola Description Part No. SH1202 NOT PLACED SH1301 NOT PLACED SH1302 2680473U01 VCO SHIELD U0101 5102226J56 MC68HC11FL0 U0111 5102463J64 EEPROM U0121 5186137B01 FLASH ROM U0122 5185963A21 SRAM U0141 5113805A30 REMUX U0211...

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