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Motorola Mototrbo DGR 6175 Detailed Service Manual

Professional digital two-way radio system. Uploaded by: Renato Barbiero  
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   Summary of Contents for Motorola Mototrbo DGR 6175

  • Page 2: Computer Software Copyrights

    No duplication or distribution of this document or any portion thereof shall take place without the express written permission of Motorola. No part of this manual may be reproduced, distributed, or transmitted in any form or by any means, electronic or mechanical, for any purpose without the express written permission of Motorola.

  • Page 3

    Document History The following major changes have been implemented in this manual since the previous edition: Edition Description Date 6880309T91-A Initial edition June, 2007...

  • Page 4

    Notes...

  • Page 5: Limited Warranty

    Product Accessories One (1) Year Motorola, at its option, will at no charge either repair the Product (with new or reconditioned parts), replace it (with a new or reconditioned Product), or refund the purchase price of the Product during the warranty period provided it is returned in accordance with the terms of this warranty. Replaced parts or boards are warranted for the balance of the original applicable warranty period.

  • Page 6

    Warranty service will be provided by Motorola through one of its authorized warranty service locations. If you first contact the company which sold you the Product, it can facilitate your obtaining warranty service. You can also open a Contact Us case on Motorola Online (http://www.motorola.com/businessonline).

  • Page 7

    A. that MOTOROLA will be notified promptly in writing by such purchaser of any notice of such claim; B. that MOTOROLA will have sole control of the defense of such suit and all negotiations for its settlement or compromise; and C.

  • Page 8

    viii Commercial Warranty Notes...

  • Page 9: Table Of Contents

    Repeater Indicator Board Service Information Chapter 3 Connector Board Service Information Chapter 4 Controller Service Information Chapter 5 UHF1 High Power Service Information Chapter 6 VHF High Power Service Information Appendix A Replacement Parts Ordering Appendix B Motorola Service Centers Glossary June, 2007...

  • Page 10

    Notes...

  • Page 11: Service Maintainability

    DGR 6175 MOTOTRBO Repeater Chapter 1 Service Maintainability Issue: June, 2007...

  • Page 12

    Motorola. Furthermore, the purchase of Motorola products shall not be deemed to grant either directly or by implication, estoppel, or otherwise, any license under the copyrights, patents or patent applications of Motorola, except for the normal non-exclusive license to use that arises by operation of law in the sale of a product.

  • Page 13: Table Of Contents

    Chapter 1 - Service Maintainability Table of Contents Section 1 Introduction 1.0 Notations Used in This Manual ................1-1 2.0 Repeater Description ...................1-1 Section 2 Maintenance 1.0 Introduction ......................2-1 2.0 Preventive Maintenance ..................2-1 2.1 Inspection .......................2-1 2.2 Cleaning Procedures ..................2-1 Section 3 Test Equipment and Service Aids 1.0 Recommended Test Equipment ................3-1 2.0 Service Aids ......................3-2...

  • Page 14

    Notes...

  • Page 15: Notations Used In This Manual

    Section 1 INTRODUCTION Notations Used in This Manual Throughout the text in this publication, you will notice the use of note and caution notations. These notations are used to emphasize that safety hazards exist, and due care must be taken and observed.

  • Page 16

    Repeater Description Notes...

  • Page 17: Preventive Maintenance

    Section 2 MAINTENANCE Introduction This chapter provides details about the following: Preventive maintenance (inspection and cleaning). • Safe handling of CMOS and LDMOS devices. • Repair procedures and techniques. • Preventive Maintenance Periodic visual inspection and cleaning is recommended. Inspection Check that the external surfaces of the repeater are clean, and that all external controls and switches are functional.

  • Page 18

    • Wear a conductive wrist strap in series with a 100k resistor to ground. (Replacement wrist straps that connect to the bench top covering are Motorola part number 4280385A59). • Do not wear nylon clothing while handling CMOS devices. • Do not insert or remove CMOS devices with power applied. Check all power supplies used for testing CMOS devices to be certain that there are no voltage transients present.

  • Page 19

    When damaged parts are replaced, identical parts should be used. If the identical replacement part is not locally available, check the parts list for the proper Motorola part number and order the part from the nearest Motorola Radio Products and Solutions Organization listed in Appendix A of this manual.

  • Page 20

    Preventive Maintenance Chip Components Use the RLN4062 Hot-Air Repair Station for chip component replacement. Adjust the temperature control to 370 °C (700 °F), and adjust the airflow to a minimum setting. Airflow can vary due to component density. To remove a chip component: •...

  • Page 21

    Preventive Maintenance Shields Removing and replacing shields is recommended to be done with the Air Blower, BOSCH GHG 600-3 or equivalent. The temperature should be set to approximately 400°C (752°F). To remove the shield: • Place the circuit board in the circuit board holder. Add solder paste flux around the base of the shield.

  • Page 22

    Preventive Maintenance Notes...

  • Page 23: Recommended Test Equipment

    Section 3 TEST EQUIPMENT AND SERVICE AIDS Recommended Test Equipment The list of equipment contained in Table 3-1 includes most of the standard test equipment required for servicing Motorola repeaters. Table 3-1 Recommended Test Equipment Equipment Characteristic Example Application Service Monitor...

  • Page 24: Programming Cables

    Table 3-2 lists the service aids recommended for working on the repeater. 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 25

    Programming Cables DB 25 CONNECTOR USB CONNECTOR 1455 24 CABLE WIRE DIAGRAM 915 15 CABLE 26 PIN DB25P ACCESSORY PORT CONNECTOR PIN No. DESCRIPTION VCC (5v) DATA - TO MOBILE RADIO DATA + ACCESSORY CONNECTOR SPEAKER - EXT MIC DIGI IN 1 VIEWED FROM (EXT PTT) FRONT (PIN END)

  • Page 26

    Programming Cables Notes...

  • Page 27: Repeater Indicator Board Service Information

    DGR 6175 MOTOTRBO Repeater Chapter 2 Repeater Indicator Board Service Information Issue: June, 2007...

  • Page 28

    Motorola. Furthermore, the purchase of Motorola products shall not be deemed to grant either directly or by implication, estoppel or otherwise, any license under the copyrights, patents or patent applications of Motorola, except for the normal non-exclusive license to use that arises by operation of law in the sale of a product.

  • Page 29: Table Of Contents

    Chapter 2 - Repeater Indicator Board Service Information Table of Contents Section 1 Theory of Operation 1.0 Overview ......................1-1 2.0 Repeater Indicator Board..................1-1 Section 2 Repeater Indicator Board/Schematics / Parts List 1.0 Allocation of Printed Circuit Board, Schematic and Parts List ......2-1 1.1 Repeater Indicator Board Circuits ..............2-1 2.0 Repeater Indicator Board (PMLN4814_) PCB/Schematics/Parts List ....2-3 Repeater Indicator Board PCB 8415470H02 (Top Side)........2-3...

  • Page 30

    Notes...

  • Page 31: Theory Of Operation

    Section 1 THEORY OF OPERATION Overview This section provides a detailed theory of operation for the Repeater Indicator Board and its components. Repeater Indicator Board The Repeater Indicator board contains circuitry to drive the front panel indicator LEDs, a RTC battery for the RTC in the transmit radio, as well as an Ethernet controller for future development.

  • Page 32

    Repeater Indicator Board The power LED is the only LED that is not controlled by the software. This bi-color LED gets turned on green when the 13.8 V output from the power supply is valid. It turns on red when A/C power is lost, and the repeater's backup battery is used.

  • Page 33: Allocation Of Printed Circuit Board, Schematic And Parts List

    Section 2 REPEATER INDICATOR BOARD/SCHEMATICS / PARTS LIST Allocation of Printed Circuit Board, Schematic and Parts List Repeater Indicator Board Circuits This Chapter shows the Printed Circuit Board (PCB), Schematic and Parts List for the Repeater Indicator Board circuit. PCB : 8415470H02 Repeater Indicator Board Top Side Page 2-3 8415470H02 Repeater Indicator Board Bottom Side...

  • Page 34

    Allocation of Printed Circuit Board, Schematic and Parts List Notes...

  • Page 35: Repeater Indicator Board (pmln4814_) Pcb/schematics/parts List

    Repeater Indicator Board (PMLN4814_) PCB/Schematics/Parts List Repeater Indicator Board (PMLN4814_) PCB/Schematics/Parts List TP13 TP12 TP10 TP11 (For reference only - board is not field-repairable) Repeater Indicator Board PCB 8415470H02 (Top Side)

  • Page 36: Repeater Indicator Board Pcb 8415470h02 (bottom Side)

    Repeater Indicator Board (PMLN4814_) PCB/Schematics/Parts List 1D20 1D23 1D21 1D22 (For reference only - board is not field-repairable) Repeater Indicator Board PCB 8415470H02 (Bottom Side)

  • Page 37: Repeater Indicator Board Schematic Diagram (sheet 1 Of 2)

    Repeater Indicator Board (PMLN4814_) PCB/Schematics/Parts List 13V6 13V6 1V 8 13V6 CONTROL HEAD 0.1uF 0.1u F D2 0 CONNECTO RPT DIS R6 4 R6 5 J1-30 13V6 J1-29 J1-28 TXA_LED SERIAL_DAT A SRCLK Y_ 1 A_ 1 J1-27 TXB_LED SERIAL_CLK RCL K Y_ 2 A_ 2...

  • Page 38: Repeater Indicator Board Schematic Diagram (sheet 2 Of 2)

    Repeater Indicator Board (PMLN4814_) PCB/Schematics/Parts List 25MHz XTAL_25MHZ 18pF 18pF 1.5K 10uF 1.5K CLK25M_I 0.1uF R7 6 RJ45 ETHERNET 1MEG R6 1 CONNECTOR 0.1uF CX-91F USB_DP 12MHz USB_DM ICLK25 XFMR OCLK25 ICLK12 RJ_TXP POS1 18pF 18pF J2-5 OCLK12 RJ_TX M POS 2 J2-4 RXCLK...

  • Page 39: Repeater Indicator Board Parts List Pmln4814_

    Repeater Indicator Board (PMLN4814_) PCB/Schematics/Parts List Repeater Indicator Board Parts List Circuit Motorola Part Circuit Motorola Part Circuit Motorola Part PMLN4814_ Description Description Description 2113945C31 CAP, 0.1uF 4815261H01 DTC114YKAF 0613958S75 RES, 1.2K Circuit Motorola Part 2113945C31 CAP, 0.1uF 4815261H01 DTC114YKAF...

  • Page 40

    Repeater Indicator Board (PMLN4814_) PCB/Schematics/Parts List Circuit Motorola Part Description 0613952Q95 RES, 8.2K 0613952N01 RES, 10K 0613952H92 RES, 6.2K 0613952Q95 RES, 2K 0615471H01 THERM, 10K 2515640H01 XFMR_H1260 5115984H01 AT93C46A 5115391H01 TK11100CSC 5115476H01 SN74AHC594DR 5171161L01 ADM8515 5115502H01 SN74LVC07ADR 4815263H01 DTC144EKAF 4815867H01...

  • Page 41: Connector Board Service Information

    DGR 6175 MOTOTRBO Repeater Chapter 3 Connector Board Service Information Issue: June, 2007...

  • Page 42

    Motorola. Furthermore, the purchase of Motorola products shall not be deemed to grant either directly or by implication, estoppel or otherwise, any license under the copyrights, patents or patent applications of Motorola, except for the normal non-exclusive license to use that arises by operation of law in the sale of a product.

  • Page 43: Table Of Contents

    Chapter 3 - Connector Board Service Information Table of Contents Section 1 Theory of Operation 1.0 Overview ......................1-1 2.0 Connector Board....................1-1 2.1 Fan .........................1-2 2.2 AC/DC Power Supply ..................1-2 Section 2 Connector Board/Schematics / Parts List 1.0 Allocation of Printed Circuit Board, Schematic and Parts List ......2-1 1.1 Connector Board Circuits ................2-1 2.0 Connector Board (PMLN4815_) PCB/Schematics/Parts List ......2-3 Connector Board PCB 8415472H01 ..............2-3...

  • Page 44

    Notes...

  • Page 45: Overview

    Section 1 THEORY OF OPERATION Overview This section provides a detailed theory of operation for the Connector Board and its components. Connector Board The Connector board has two purposes: provide a place for the Repeater’s MAP and Ethernet connectors to be mounted and a location for the Repeater’s fan control circuitry. To MAP Conne ctor On Transmit Radi o To Power...

  • Page 46: Ac/dc Power Supply

    Connector Board The fan control logic is provided by the fan controller IC (U51). This is a programmable device from Cypress Semiconductor. There are basically two functions provided by the fan controller. First, it provides a PWM output based on a temperature input, and secondly, it provides detection of fan failure based on the fan tachometer reading.

  • Page 47

    Section 2 CONNECTOR BOARD/SCHEMATICS / PARTS LIST Allocation of Printed Circuit Board, Schematic and Parts List Connector Board Circuits This Chapter shows the Printed Circuit Board (PCB), Schematic and Parts List for the Connector Board circuit. PCB : 8415472H01 Connector Board Page 2-3 SCHEMATICS Connector Board Schematic Diagram (Sheet 1 of 2)

  • Page 48

    Allocation of Printed Circuit Board, Schematic and Parts List Notes...

  • Page 49: Connector Board (pmln4815_) Pcb/schematics/parts List

    Connector Board (PMLN4815_) PCB/Schematics/Parts List Connector Board (PMLN4815_) PCB/Schematics/Parts List (For reference only - board is not field-repairable) Connector Board PCB 8415472H01...

  • Page 50: Connector Board Schematic Diagram (sheet 1 Of 2)

    Connector Board (PMLN4815_) PCB/Schematics/Parts List 13V8 RJ45 EXTERNAL RJ45 INTERNAL RJ45_TXP J8-5 J9-5 RJ45_TXN J8-4 J9-4 RJ45_RXP J8-6 J9-6 FAN_FAIL J8-3 J9-3 J8-7 J9-7 RJ45_RXN J8-2 J9-2 J8-8 J9-8 J8-1 J9-1 J8-9 J9-9 J8-1 0 J9-1 0 TRANSMIT ACC CONN EXTERNAL ACC CONN 13V8 USB_DP_MAP...

  • Page 51: Connector Board Schematic Diagram (sheet 2 Of 2)

    Connector Board (PMLN4815_) PCB/Schematics/Parts List 13V8 39.2K 100pF TK11100CSC 2 FB 6 NP VOUT 4 VCONT 1000pF 3 VIN 0.1uF 1.0uF LM50 0.1uF 1.0uF VOUT 0.1uF 0.1uF 0.1uF P1_0 11 ISSP_DATA XRES P1- 1 ISSP_CLK P0_0 P1_1 P1- 2 XRES P0_1 P1_2 P1- 3...

  • Page 52: Connector Board Parts List Pmln4815_

    Connector Board (PMLN4815_) PCB/Schematics/Parts List Connector Board Parts List Circuit Motorola Part PMLN4815_ Description 0104024J17 Assy Prdt, CY8C21334-24PVXIT Circuit Motorola Part Description 5115022H01 IC Temperature Sensor 8415472H01 2186154V01 CAP, 1000pF 2313960D07 CAPP, 10uF 2113945C31 CAP, 0.1uF 2113945C31 CAP, 0.1uF 2113945C31 CAP, 0.1uF...

  • Page 53: Controller Service Information

    DGR 6175 MOTOTRBO Repeater Chapter 4 Controller Service Information Issue: June, 2007...

  • Page 54

    Motorola. Furthermore, the purchase of Motorola products shall not be deemed to grant either directly or by implication, estoppel or otherwise, any license under the copyrights, patents or patent applications of Motorola, except for the normal non-exclusive license to use that arises by operation of law in the sale of a product.

  • Page 55

    Chapter 4 - Controller Service Information Table of Contents Section 1 Theory of Operation 1.0 Controller ......................1-1 1.1 Radio Power Distribution ................1-2 1.2 Power On/Off....................1-4 1.3 Clocks......................1-6 1.4 Serial Peripheral Interface (SPI)..............1-7 1.5 Serial Synchronous Interface (SSI) ..............1-8 1.6 ACC_ID Interface ...................1-9 1.7 USB Interface ....................1-10 1.8 Ethernet Interface ..................1-10 1.9 Mobile Accessory Port (MAP)...............1-11...

  • Page 56

    Section 3 Controller Schematics / Parts Lists 1.0 Allocation of Schematics and Parts List............... 3-1 1.1 Controller Circuits................... 3-1 2.0 Controller R1 Schematic Diagrams ..............3-3 Controller - GPS Schematic Diagram..............3-3 Controller DC Supply Schematic Diagram ............. 3-4 Controller DC Distribution Schematic Diagram ............3-5 Controller Peripheral Schematic Diagram - (Sheet 1 of 2) ........

  • Page 57

    Section 1 THEORY OF OPERATION Controller The Controller section consists of 4 main ICs. These are the Texas Instrument OMAP 1710 Host/ DSP Processor (U1000), Flash memory (U2000), SDRAM memory (U2001) and the MAKO Audio/ Power Management (U3200) chip. Figure 1-1 shows how the Controller interfaces with the RF section, and peripherals in a DGR 6175 repeater.

  • Page 58

    Controller Radio Power Distribution Figure 1-2 illustrates the controller DC power distribution throughout the transceiver board. *TX_PA_Final (Q0702) *Antenna Switch ckt. Battery *Audio_PA (U3500) (J3000) Ext_SWB+ Accessory Connectory 12.6V U3003 (J4000-7) SW_9.3V_PA_Reg 9.3V *TX_PA_Pre-Driver (U0700) U0100 GPO_4 U3005 & U3006 *TX_PA_Driver (U0703) SW_9.3V_RF_Reg.

  • Page 59

    Controller Voltage regulation is provided to the controller, GPS and RF sections by the following devices: +9.3V_PA: U3005, U3006, and U3030 • +9.3V_CNTRL: U3040 and U3030 • +9.3V_SW: U3001 • +12.6V_Ext SWB+: U3003 • +1.5V GPS RTC: U6407 • +1.4V OMAP Core: U3201 •...

  • Page 60

    Controller Switcher1 (Q3200) in conjunction with the MAKO power management IC (U3200) is a highly efficient dc-dc converter. In this application, it is configured as a synchronous buck dc-dc regulator. It generates an accurate 3.6V output, which supplies directly to the MAKO internal Switcher2 circuit as well as the 1.4V regulator for the OMAP Core (U3201).

  • Page 61

    Controller 1.2.1 Power-Up Sequence Figure 1-3 details the typical power-up sequence on the mobile radio and the following events that occur sequentially. *TX_PA_Final (Q0702) *Antenna Switch ckt. Battery *Audio_PA (U3500) (J3000) Ext_SWB+ 12.6V U3003 SW_9.3V_PA_Reg 9.3V U3005 & U3006 SW_9.3V_RF_Reg. 9.3V U3001 P_FET...

  • Page 62

    Controller Clocks Figure 1-4 illustrates the controller clocks used throughout the radio. TOMAHAWK P2 ABACUS III U0100 U0600 Q0100 16.8MHz CLK2 OUT FREF XOSC BASE ARX DAC 16.8 MHZ TCXO +0.5 ppm (GPS & Repeater) +1.5 ppm (NONGPS) 1.4V MAKO P2 U1006 U3200 General Pupose...

  • Page 63

    Controller Serial Peripheral Interface (SPI) Figure 1-5 illustrates the controller SPI used throughout the radio. 1.8V OMAP1710 U1000 1.8V 2.9V 2.9V 1.8V LED’s Register Level Translator HPD SPI MMC1 SPI U6002 U6003 TOMAHAWK P2 SN74AHC594 SN74LVC07A U0100 SPI_CLK SERIAL_CLK SPI_CLK SPIF.SCK (U19) SPI.CLK (M14) CLOCK...

  • Page 64

    Controller Serial Synchronous Interface (SSI) Figure 1-6 illustrates the controller SSI used on DGR series radios controller design. 1.8V OMAP1710 1.8V U1000 1.8V 1.8V SYNCB GPIO_40 (W15) DMCS GPIO_2 (D15) TOMAHAW K P2 U0100 McBSP2.CLKX (Y6) Buffers TXCLK Cypher I/F SN74AVC1T45 J4002 SDTX...

  • Page 65

    Controller ACC_ID Interface Smart accessories use the Accessory ID (ACC_ID) Interface to help the repeater determine which smart accessory, if any, are attached to the repeater. Figure 1-7 illustrates the ACC_ID connections used within the radio. 1.875V 2.9V 2.9V R3588 Vref1 Vref2 OMAP1710...

  • Page 66: Usb Interface

    CPS and tuning via the Tuner Tool. Only one of these ports is available (via the MAP connector), the other is dedicated to the Ethernet controller. Note: The USB ports are designed to support Motorola accessories and approved applications only and will not support third party "Plug-n-Play" USB devices.

  • Page 67

    1-11 Mobile Accessory Port (MAP) The Mobile Accessory Port (MAP) is a newly defined Motorola accessory port that contains audio, programmable digital I/O, serial interfaces, and accessory supply lines; and is similar in function to Motorola's legacy products accessory connectors.

  • Page 68

    1-12 Controller Table 1-1 Mobile Accessory Port Functions MAP Pin MAP Pin Name MAKO Pin Number Prgm_In_4 (Emergency) Programmable Input with dedicated function for Emergency Switch Prgm_IO_8 Programmable Input/Output (not supported in the repeater) Prgm_1_5 (Ign_Sense) Not Used Prgm_Out_9 (Ext_Alarm) Programmable Output with prescribed function of External Alarm 1.9.1...

  • Page 69

    See section 1.6 on page 1-9 for more information on the ACC_ID interface. Note: The USB ports are designed to support Motorola accessories and appoved applications only and will not support third party "Plug-n-Play" USB devices.

  • Page 70

    1-14 Controller 1.10 Repeater Interconnections Interface The Repeater’s architecture uses two mobiles, one for transmit, one for receive to form a repeater. The Repeater Interconnection Interface is used to communicate between the Tx and Rx radios within the Repeater. This is accomplished by using one of the SSI ports from the OMAP (U1000) and level shifters/drivers (U4004, U4005, U4006, and U4007).

  • Page 71

    Section 2 TROUBLESHOOTING CHARTS Controller Troubleshooting Chart Problem has been diagnosed to either the Tx or Rx Radio. Remove faulty radio and proceed from here. The individual radio. Will Tuner connect to the Radio? Check these three conditions @ 9.3V_RF @ U3001 (pin 4=13.2V;...

  • Page 72

    Power-Up Troubleshooting Chart Power-Up Troubleshooting Chart Repeater does not fully initialize (Disabled LED stays blinking) Re-insert or Replace Do all LEDs flash Can it repeat? 30 pin Front Panel Done on power-up? cable Re-insert or replace SSI Replace Front Panel cable Board Does Repeater...

  • Page 73

    Audio Troubleshooting Chart Audio Troubleshooting Chart Audio self- check This test should be performed with the individual RX or TX radio removed from the repeater. Using the tuner tool, set the radio into RX audio test and connect an external speaker to the radio’s map.

  • Page 74

    Audio Troubleshooting Chart Notes...

  • Page 75

    Section 3 CONTROLLER SCHEMATICS / PARTS LISTS Allocation of Schematics and Parts List Controller Circuits This Chapter shows the Schematics and the Parts Lists for the Controller circuits. Table 3-1 Controller R1 Schematic Diagrams and Parts Lists Controller R1 used on PCB: 8486777Z12_A UHF (403-470 MHz), 25-40W SCHEMATICS Controller GPS...

  • Page 76

    Allocation of Schematics and Parts List Notes...

  • Page 77

    Controller R1 Schematic Diagrams Controller R1 Schematic Diagrams PERIPHERALS ( 1 SHEET ) REAR ACCESSORY CONTROL HEAD OPTION BOARD INTERFACE REPEATER INTERFACE R2508 RESET_OU 9V 3 C2500 220pF 2.775V_V4 1.875V_V2 SW_9V3 OMAP_CORE_LDO OMAP_CORE_LDO 1.875V_DIG_V2 1.875V_DIG_V2 2.775V_DIG_V4 2.775V_DIG_V4 3.3V_DIG_V10 3.3V_DIG_V10 SPI_CLK_MAKO SPI_CLK SPI_MOSI_MAKO SPI_MOSI...

  • Page 78

    Controller R1 Schematic Diagrams VBAT 13.6V (NOMINAL) J3000- 1 (TO TX PA) RAW_B+ VR3000 C3015 C3000 VBAT_GROUND 47pF 470pF E3000 U3040,U3005,U3006 change to 4813971D34 J3000- 2 (TO AUDIO PA) UNSWB+ C3002 U3006 10uF R3055 9.3V R3032 (TO PA DRIVER ONLY ) 9V3_PA R3056 U3005...

  • Page 79

    Controller R1 Schematic Diagrams 1.875V_V2_MAKO C3282 R3219 R3220 SW_9V3 2MEG 2MEG 4.7uF VSAVE C3272 R3228 LO_BATTERY_DET GATED_32KHZ_OMAP 10pF VSAVE R3200 U3202-1 32KHZ_GPS C3274 U3203 C3200 VSAVE 22uF 220pF 220K R3238 Q3200 R3222 R3209 R3233 C3276 C3201 4 IN BATTERY_SENSE 1.0uF 2.2uF SYNC_EN 43.2K...

  • Page 80

    Controller R1 Schematic Diagrams CONTROL HEAD INTERFACE C4000 C4001 C4002 C4003 C4004 C4005 C4006 C4013 220pF 220pF 220pF 220pF 220pF 220pF 220pF 220pF MMP_1_WIRE USB1_D M VBUS1 USB1_D P RESET J4001_9 3.3V E4000 J4001- 1 J4001- 2 R4000 RESET J4001- 3 R4001 DISPLAY_CMD J4001- 4...

  • Page 81

    Controller R1 Schematic Diagrams REPEATER CONNECTOR WD_RESET C4086 0.10uF J4002 FRONT VIEW R4097 McBSP3_DX DI R U4004 C4087 0.10uF TP4000 J4002- 1 J4002- 2 R4095 J4002- 3 McBSP3_FSX DI R J4002- 4 J4002- 5 J4002- 6 U4005 J4002- 7 R4105 J4002- 8 J4002- 9 J4002-10...

  • Page 82

    Controller R1 Schematic Diagrams CLK rate: 1 MHz Date rate: 20 of 8 bits packet per chip select LED & Display CS: Active Low 1.875V GP DEVICE CONFIG MCBSP3 (0.87mA/MHz for OMAP1710 & 1.06mA/MHz for OMAP1610) 1.875V (1.4V for OMAP1710 & 1.55V for OMAP1610) SERIAL FLASH SPI R1020 LARGEST REF...

  • Page 83

    Controller R1 Schematic Diagrams 1.875V_DIG_V2 1.875V_DIG_V2 FLASH SDRAM 1.875V_DIG_V2 1.875V_DIG_V2 R2004 R2011 TP_SDRAM_CLK Bootstrap Mode = 48 MH z 1.875V_DIG_V2 1.875V_DIG_V2 Normal Mode = 72 MH z C2000 C2001 C2002 C2003 C2007 C2006 C2005 C2004 100pF .01uF 0.10uF 0.10uF SDRAM_CLK 0.10uF 0.10uF .01uF...

  • Page 84

    Controller R1 Schematic Diagrams 3-10 R3510 USB1_DP USB1_DM R3560 R3572 R3512 3.3V_DIG_V10 2.9V_DIG_V6 5V_V8_MAKO MAKO_CE 2.9V_DIG_V6 U3505- 3 (SOURCE) R3584 R3585 MC3403 MOBILE REPEATER: 33K R3503 R3504 R3505 BBP_CLK U3504 MAKO SPI MOBILE SUBSCRIBER: NOT_USED TS5A23166 BBP_SYNC SPI_CLK SPI_CLK R3502 UNSWB+ R3586 MAKO_CE...

  • Page 85

    Controller R1 Schematic Diagrams 3-11 Controller R1 Parts List Circuit Motorola Part Circuit Motorola Part Circuit Motorola Part Description Description Description Circuit Motorola Part Description C2000 2113944A40 100pF C3031 2113945C31 0.1uF C3221 2113944A44 220pF C2001 2113945B02 .01uF C3032 2113945B02 .01uF...

  • Page 86

    Controller R1 Schematic Diagrams 3-12 Circuit Motorola Part Circuit Motorola Part Circuit Motorola Part Circuit Motorola Part Description Description Description Description C3273 NOT PLACED C3519 2314030F30 47uF C4004 NOT PLACED C4040 2113944A44 220pF C3274 2113944A44 220pF C3520 2113946S35 1.0uF C4005...

  • Page 87

    Controller R1 Schematic Diagrams 3-13 Circuit Motorola Part Circuit Motorola Part Circuit Motorola Part Circuit Motorola Part Description Description Description Description C4075 NOT PLACED E4004 2409134J25 FERRITE BEAD Q3501 4815272H01 ANALOG SWITCH R1021 0613952R66 C4076 NOT PLACED E4005 2409134J25 FERRITE BEAD...

  • Page 88

    Controller R1 Schematic Diagrams 3-14 Circuit Motorola Part Circuit Motorola Part Circuit Motorola Part Circuit Motorola Part Description Description Description Description R2012 0613952R01 R3002 0613952R01 R3053 0613952R66 R3237 0613952R01 R2013 0613952R01 R3003 0613952M54 3.57K R3054 0613952R66 R3238 0613952H25 R2500 0613952R66...

  • Page 89

    Controller R1 Schematic Diagrams 3-15 Circuit Motorola Part Circuit Motorola Part Circuit Motorola Part Circuit Motorola Part Description Description Description Description R3524 0613952Q67 R3569 0613952Q73 R4005 0613952Q37 R4065 0613952Q37 R3525 0613952R25 100K R3571 0613952Q80 R4006 0613952Q65 R4066 0613952Q37 R3526 0613952R66...

  • Page 90

    Controller R1 Schematic Diagrams 3-16 Circuit Motorola Part Circuit Motorola Part Circuit Motorola Part Description Description Description R4103 0613952Q75 1.2K U4000 5115476H01 IC, SERIAL-TO-PARAL- VR4008 NOT PLACED LEL CONVERTER R4105 0613952R01 Y1000 4809612J45 12MHZ CRYSTAL U4001 5115502H01 LOGIC TRANSLATOR R4106...

  • Page 91

    Controller R2 Schematic Diagrams 3-17 Controller R2 Schematic Diagrams PERIPHERALS ( 1 SHEET) REAR ACCESSORY CONTROL HEAD OPTION BOARD INTERFACE REPEATER INTERFACE R2508 RESET_OUT C2500 220pF 2.775V_V4 1.875V_V2 SW_9V3 OMAP_CORE_LDO OMAP_CORE_LDO 1.875V_DIG_V2 1.875V_DIG_V2 2.775V_DIG_V4 2.775V_DIG_V4 3.3V_DIG_V10 3.3V_DIG_V10 SPI_CLK SPI_CLK_MAKO SPI_MOSI SPI_MOSI_MAKO 1.875V_V2 SPI_MISO...

  • Page 92

    Controller R2 Schematic Diagrams 3-18 VBAT 13.6V (NOMINAL) J3000-1 RAW_B+ (TO TX PA) C3015 C3000 VBAT_GROUND 47pF 470pF VR3000 E3000 J3000-2 U3040,U3005,U3006 change to 4813971D34 UNSWB+ (TO AUDIO PA) 9.3V R3055 C3002 10uF U3006 R3032 9V3_PA (TO PA DRIVER ONLY) R3056 C3021 C3020...

  • Page 93

    Controller R2 Schematic Diagrams 3-19 C3282 R3219 R3220 1.875V_V2_MAKO 4.7uF 2MEG 2MEG SW_9V3 VSAVE C3272 R3228 10pF LO_BATTERY_DET GATED_32KHZ_OMAP VSAVE R3200 32KHZ_GPS C3274 U3203 C3200 U3202-1 220pF VSAVE NL17SZ14 R3238 22uF LMC6035ITLX 5114007A43 R3233 Q3200 R3209 43.2K 4 IN C3276 C3201 BATTERY_SENSE 1.0uF...

  • Page 94

    Controller R2 Schematic Diagrams 3-20 CONTROL HEAD INTERFACE I/O History MOBILE REPEATER: NOT_USED P1 0102726B32 MMP_1_WIRE VBUS1 USB1_DM MOBILE SUBSCRIBER: 33 OHM USB1_DP C4013 C4000 C4001 C4002 C4003 C4004 C4005 C4006 RESET J4001_9 220pF 220pF 220pF 220pF 220pF 220pF 220pF 220pF E4000 3.3V...

  • Page 95

    Controller R2 Schematic Diagrams 3-21 REPEATER CONNECTOR WD_RESET C4086 0.10uF J4002 FRONT VIEW R4097 McBSP3_DX SN74AVC1T45 U4004 C4087 0.10uF TP4000 J4002-1 J4002-2 R4095 McBSP3_FSX J4002-3 J4002-4 J4002-5 SN74AVC1T45 J4002-6 U4005 J4002-7 R4105 J4002-8 J4002-9 J4002-10 R4099 DIR_CTRL J4002-11 C4088 0.10uF C4007 C4010 C4011...

  • Page 96

    Controller R2 Schematic Diagrams 3-22 OMAP1610 / 1710 CLK rate: 1 MHz Date rate: 20 of 8 bits packet per chip select GP DEVICE CONFIG MCBSP3 LED & Display CS: Active Low 1.875V R1020 DECOUPLING CAPACITORS (0.87mA/MHz for OMAP1710 & 1.06mA/MHz for OMAP1610) LARGEST REF R1034 OMAP_CORE...

  • Page 97

    Controller R2 Schematic Diagrams 3-23 1.875V_DIG_V2 1.875V_DIG_V2 FLASH SDRAM 1.875V_DIG_V2 1.875V_DIG_V2 R2004 R2011 TP_SDRAM_CLK Bootstrap Mode = 48 MHz 1.875V_DIG_V2 1.875V_DIG_V2 Normal Mode = 72 MHz C2001 C2000 C2003 C2002 .01uF 100pF 0.10uF 0.10uF C2004 C2007 C2006 C2005 SDRAM_CLK 100pF 0.10uF 0.10uF .01uF...

  • Page 98

    Controller R2 Schematic Diagrams 3-24 R3510 USB1_DP R3512 USB1_DM R3560 R3572 3.3V_DIG_V10 2.9V_DIG_V6 5V_V8_MAKO 2.9V_DIG_V6 U3505-3 R3584 R3585 MC3403 U3504 (SOURCE) MOBILE REPEATER: 33K R3503 R3504 R3505 BBP_CLK TS5A23166 MOBILE SUBSCRIBER: NOT_USED BBP_SYNC MAKO SPI R3502 R3586 SPI_CLK SPI_CLK UNSWB+ MAKO_CE SPI_CS COM1...

  • Page 99

    Controller R2 Schematic Diagrams 3-25 Controller R2 Parts List Circuit Motorola Part Circuit Motorola Part Circuit Motorola Part Description Description Description Circuit Motorola Part Description C2000 2113944A40 100pF C3031 2113945C31 0.1uF C3221 2113944A44 220pF C2001 2113945B02 .01uF C3032 2113945B02 .01uF...

  • Page 100

    Controller R2 Schematic Diagrams 3-26 Circuit Motorola Part Circuit Motorola Part Circuit Motorola Part Circuit Motorola Part Description Description Description Description C3273 NOT PLACED C3519 2314030F30 47uF C4006 2113944A44 220pF C4042 2113944A44 220pF C3274 2113944A44 220pF C3520 2113946S35 1.0uF C4007...

  • Page 101

    Controller R2 Schematic Diagrams 3-27 Circuit Motorola Part Circuit Motorola Part Circuit Motorola Part Circuit Motorola Part Description Description Description Description C4084 2113945Y02 0.10uF J2500 0905505Y02 22-PIN JTAG CONNEC- Q3503 4815272H01 ANALOG SWITCH R1026 0613952R17 C4085 2113944A44 220pF Q3504 4815270H01...

  • Page 102

    Controller R2 Schematic Diagrams 3-28 Circuit Motorola Part Circuit Motorola Part Circuit Motorola Part Circuit Motorola Part Description Description Description Description R2500 0613952R66 R3004 0613952L73 R3055 0615871H01 R3239 0613952H25 R2501 0613952R66 R3005 0613952Q81 2.2K R3056 0615871H01 R3240 0613952R17 R2502 0613952R66...

  • Page 103

    Controller R2 Schematic Diagrams 3-29 Circuit Motorola Part Circuit Motorola Part Circuit Motorola Part Circuit Motorola Part Description Description Description Description R3525 0613952R25 100K R3559 0613952R01 R4000 NOTPLACED R4054 0613952R01 R3526 0613952R66 R3560 0613952R17 R4001 0613952Q37 R4055 0613952R01 R3528 0613952R09...

  • Page 104

    Controller R2 Schematic Diagrams 3-30 Circuit Motorola Part Circuit Motorola Part Circuit Motorola Part Description Description Description R4097 0613952R66 U3503 5164852H47 IC, LEVEL TRANSLA- VR4003 4813977A48 DIODE, 20V ZENER R4098 0613952Q89 4.7K VR4004 4813977A48 DIODE, 20V ZENER U3504 5171395L01 IC, CMOS SWITCH...

  • Page 105

    DGR 6175 MOTOTRBO Repeater Chapter 5 UHF1 (403-470 MHz) 25-40W Service Information Issue: June, 2007...

  • Page 106

    Motorola. Furthermore, the purchase of Motorola products shall not be deemed to grant either directly or by implication, estoppel, or otherwise, any license under the copyrights, patents or patent applications of Motorola, except for the normal non-exclusive license to use that arises by operation of law in the sale of a product.

  • Page 107: Repeater Indicator Board

    Chapter 5 - UHF1 High Power Service Information Table of Contents Section 1 Theory of Operation 1.0 Introduction ......................1-1 1.1 Receiver ......................1-2 1.2 Transmitter .....................1-2 1.3 Repeater Indicator Board ................1-2 1.4 Connector Board ....................1-3 1.5 Fan .........................1-4 1.6 AC/DC Power Supply ..................1-4 2.0 Repeater Interconnections and Cables..............1-5 3.0 Mobile Radio’s Theory of Operation ..............1-6 3.1 UHF (403-470 MHz) Receiver Circuitry............1-6...

  • Page 108

    Section 3 UHF1 PCB/Schematics/Parts Lists 1.0 Allocation of Schematics and Circuit Boards ............3-1 1.1 Controller Circuits................... 3-1 2.0 UHF1 (403-470 MHz) 25 - 40W PCB / Schematics / Parts List ......3-3 UHF1 (403-470 MHz) 25-40W 8486777Z12 Top Side ........... 3-3 UHF1 (403-470 MHz) 25-40W 8486777Z12 Bottom Side........

  • Page 109

    Section 1 THEORY OF OPERATION Introduction The MOTOTRBO repeater consists of two MOTOTRBO mobile radios; one to act as a receiver, and one to act as a transmitter and controller. Both of these radios contain specialized software that allows them to function together as a repeater. The Repeater also contains a Repeater Indicator board and a Connector board.

  • Page 110

    Introduction Receiver The receiver uses a transceiver board which is based on the mobile radio's transceiver board. The board uses the same PCB as the mobile radio board, but is populated differently to work in the Repeater application. Only the receiver related functions of the board are utilized in this application, even though the circuitry for transmit also exists on the board.

  • Page 111

    Introduction The Repeater Disable LED is a dual-purpose LED that is hardware controlled initially at power-up. As soon as VBUS power is available on the Repeater Indicator board, the hardware circuitry for the Repeater Disable LED will cause it to blink periodically. When the software initialization is completed by the firmware, the blink circuitry will get disabled by the firmware.

  • Page 112

    Introduction The fan control logic is provided by the fan controller IC (U51). This is a device from Cypress Semiconductor. There are basically two functions provided by the fan controller. First, it provides a PWM output based on a temperature input, and secondly, it provides detection of fan failure based on the fan tachometer reading.

  • Page 113

    Repeater Interconnections and Cables Repeater Interconnections and Cables Figure 1-4 shows the Cable interconnections inside the Repeater. Display Driver USB to Ethernet Interface Backup Option Option Repeater Repeater Mobile Mic Mobile Mic Board Board Interface Interface Port (MMP) Port (MMP) Interface Interface Front Connector...

  • Page 114

    Mobile Radio’s Theory of Operation Eleven conductor flex cable. Provides the SSI connection between the transmit and receive radios. Refer to Section for more details on this interface. Thirty conductor flex cable. Provides the connection from the transmit radio to the Repeater Indicator board and includes SPI signals to drive the LED indicators, RTC backup supply, and the interface to the Ethernet controller.

  • Page 115

    Mobile Radio’s Theory of Operation The signal next reaches the pre-selector filter, which is a 2-pole varactor-tuned filter with 5 zeros that are optimized to provide image frequency rejection. This filter, along with the similarly designed post-selector filter, provides over 75 dB of image response rejection. The 3 dB bandwidth for both filters varies across the band with a minimum of 19 MHz at 403 MHz and a maximum of 40 MHz around 436 MHz.

  • Page 116

    Mobile Radio’s Theory of Operation The Abacus III accepts the 73.35 MHz signal, processes it, and sends out I/Q data in 16-bit format to the DSP at a 20 kHz rate. Internal to the Abacus III is an LNA and 16 dB FE attenuator, an internal integer-N synthesizer used to control the external 2 LO VCO, a Sigma-Delta ADC and decimation filter, and control and formatting logic for outputting the baseband I/Q data.

  • Page 117

    Mobile Radio’s Theory of Operation UHF (403-470 MHz) Transmitter Circuitry - 40 Watt The Transmitter consists of the power amplifier (PA) circuitry and the power control circuitry. The power amplifier provides amplification of the signal from the VCO up to the desired output power. The power control block is responsible for ensuring the desired output power level is maintained in both analog and digital modes, as well as protecting the power amplifier from damage due to heat, antenna mismatch, out-of-range battery voltage, and poor assembly.

  • Page 118

    1-10 Mobile Radio’s Theory of Operation 3.2.3 Pre-Driver Stage The next stage is a low-power, LDMOS device (RD01MUS1, Q0705), which delivers up to +27 dBm to the driver stage. Its gain is controlled by varying the gate bias voltage and varies from low gain up to approximately 14 dB power gain.

  • Page 119

    Mobile Radio’s Theory of Operation 1-11 The output matching circuit and power combiner is comprised of C0811, C0719, C0812, C0746, C0726, and C0737 and associated microstrips fabricated on the printed circuit board. Additional pads are provided on the PC board to allow for possible engineering optimizations to this match. These are non-populated parts C0720, C0721, C0747, C0748, C0727, and C0741.

  • Page 120

    1-12 Mobile Radio’s Theory of Operation The directional coupler functions not only as part of the transmitter power regulation circuit but also as part of the VSWR load-detection circuitry. Its physical location close to the antenna connector allows accurate VSWR sense at the transmitter output. Forward and reverse coupled signals are rectified by D0904 and D0905, respectively.

  • Page 121

    Mobile Radio’s Theory of Operation 1-13 3.2.10 Power Ramp Profile Control In order to minimize the transient adjacent channel power at the transmitter’s output, the ramped power follows a raised-cosine profile. The PA controller IC has a linear slope function when scaled in dB/V.

  • Page 122

    1-14 Mobile Radio’s Theory of Operation Frequency Generation Circuitry The synthesizer subsystem consists of the reference oscillator (Y0100), the fractional-N synthesizer IC (Tomahawk II, U0100), and the Voltage Controlled Oscillator VCO. 3.3.1 Reference Oscillator The reference oscillator (Y0100) contains a temperature compensated crystal oscillator with a frequency of 16.8 MHz.

  • Page 123

    Mobile Radio’s Theory of Operation 1-15 A voltage of 2.775 Volts applied to the super filter input (U0100 pin J4) supplies an output voltage of 2.45 Vdc (SF_OUT) at pin K4. This supplies the VCO and the VCO modulation bias circuit (via R0321).

  • Page 124

    1-16 Mobile Radio’s Theory of Operation The 2.45 Volt super filtered output, SF_OUT, of the Tomahawk IC (U0100-K4) supplies the bias to the oscillators. A portion of the VCO output signal is lightly coupled through coupling capacitors C0331 and C0231, routed through a low-pass filter (formed by L0221, C0235, C0230, and C0233), and fed back to the M_PRSC input of the Tomahawk IC (U0100-J2).

  • Page 125

    Mobile Radio’s Theory of Operation 1-17 To reduce lock time when new frequency data has been loaded into the synthesizer, an adapt charge pump providing much greater current than the main charge pump is turned on for a finite amount of time to quickly charge or discharge the loop filter capacitors to steer the VCO to the desired frequency.

  • Page 126

    1-18 Mobile Radio’s Theory of Operation Notes...

  • Page 127

    Section 2 TROUBLESHOOTING CHARTS Troubleshooting Flow Chart for Receiver (Sheet 1 of 3) ALL Troubleshooting within the dotted line is done on the TX BRICK NO RX AUDIO Set up radio in Analog Volume Receive mode on Audio at pin 6 Audio at pin 10 level desired channel...

  • Page 128

    Troubleshooting Flow Chart for Receiver Troubleshooting Flow Chart for Receiver (Sheet 2 of 3) ALL Troubleshooting on this page is done on the RX BRICK +9.0 VDC Voltage level Check biasing on on pin 4 >2.7 VDC Q0403 before replacing at Q0403? on D0401? Check circuitry around...

  • Page 129

    Troubleshooting Flow Chart for Receiver Troubleshooting Flow Chart for Receiver (Sheet 3 of 3) ALL Troubleshooting on this page is done on the RX BRICK 3.0 VDC Check Controller 5.0 VDC on pin 1 Troubleshooting at E0610? 16.8 MHz Check Synthesizer of U0601? Flow Chart present...

  • Page 130

    Troubleshooting Flow Chart for 40W Transmitter Troubleshooting Flow Chart for 40W Transmitter No Transmitter Power Check 9V3_PA Regulator in Is TP0909 Is TP0702 Controller Troubleshooting > 1 VDC? = 9.3 VDC? Flow Chart Is TP0913 Is D0702-K Check 9.3V Regulator Check T/R bias circuit (U3001) = 9.1 VDC?

  • Page 131

    Troubleshooting Flow Chart for Synthesizer Troubleshooting Flow Chart for Synthesizer Start Visual check of Correct the Board OK? Problem +2.45V at C0137 Are C0136, Replace U0100 (SF_OUT)? C0137 OK? Check 5V +5V at R0100? Regulator U3002 Replace or resolder components +2.775V at R0101 and Check U3200...

  • Page 132

    Troubleshooting Flow Chart for Tx VCO (Sheet 1 of 2) Troubleshooting Flow Chart for Tx VCO (Sheet 1 of 2) No TX VCO signal at C0318 No TX VCO signal at C0318 Visual check Visual check Correct problem Correct problem of board of board Correct problem...

  • Page 133

    Troubleshooting Flow Chart for Tx VCO (Sheet 1 of 2) Troubleshooting Flow Chart for Tx VCO (Sheet 2 of 2) Tx VCO locked but no Tx VCO not locked high-port modulation at correct frequency Check R0321, R0320, Check R0321, R0320, R0319, ~2.1 VDC at DC Voltage R0319, and CR0300...

  • Page 134

    Troubleshooting Flow Chart for Rx VCO (Sheet 1 of 2) Troubleshooting Flow Chart for Rx VCO (Sheet 1 of 2) No Rx VCO signal at C0218 Visual check Correct problem of board Correct problem Radio did not boot up 9 VDC at E0201? Radio did not boot up properly or check properly or check...

  • Page 135

    Troubleshooting Flow Chart for Rx VCO (Sheet 1 of 2) Troubleshooting Flow Chart for Rx VCO (Sheet 2 of 2) Rx VCO not locked at correct frequency Rx VCO not locked DC Voltage Check Synthesizer at R0211 Check Synthesizer Troubleshooting between 0.6 Troubleshooting Flow Chart...

  • Page 136

    2-10 Troubleshooting Flow Chart for Repeater Troubleshooting Flow Chart for Repeater Repeater does not fully initialize (Disabled LED stays blinking) Re-insert or Replace Do all LEDs flash Can it repeat? 30 pin Front Panel Done on power-up? cable Re-insert or replace SSI Replace Front Panel cable Board...

  • Page 137

    Section 3 UHF1 PCB/SCHEMATICS/PARTS LISTS Allocation of Schematics and Circuit Boards Controller Circuits The UHF1 circuits are contained on the Printed Circuit Board (PCB) which also contains the Controller circuits. This Chapter shows the schematics for the UHF1 circuits only, refer to the Controller section for details of the related Controller circuits.

  • Page 138

    Allocation of Schematics and Circuit Boards Notes...

  • Page 139

    UHF1 (403-470 MHz) 25 - 40W PCB / Schematics / Parts List UHF1 (403-470 MHz) 25 - 40W PCB / Schematics / Parts List C3018 J3000 VR4004 J4000 C0705 C0710 C0704 C4048 C0703 R4050 E0700 R0713 C3006 Q4013 E4005 C4075 C0702 L0722 VR4000...

  • Page 140

    UHF1 (403-470 MHz) 25 - 40W PCB / Schematics / Parts List R3548 R3529 C6436 D4000 C6437 R4035 R6434 C3533 R6430 R4049 C3045 Q4009 E6400 Q4012 C0741 C3534 R0973 R6432 C6413 C6412 C0943 L0904 Q4014 Q4007 Q4003 Q4001 L0700 D0905 C0721 R6437 VR3000...

  • Page 141

    UHF1 (403-470 MHz) 25 - 40W PCB / Schematics / Parts List RAW_B+ PA_SUPPLY 9V3_PA 9V3_PA 5V_SW 1.875V_DIG_V2 1.8V_TH_DIG RX_VCO_SEL1_ 2.775V_DIG_V4 2.8V_TH_DIG RX_VCO_SEL1 RX_VCO_SEL2_ 2.775V_ANA_V7 2.8V_TH_ANA RX_VCO_SEL2 TX_VCO_SEL1_ TX_VCO_SEL1 9V3_SYNTH_IN 9V3_SYNTH SPI_BUS(0:4) TX_VCO_SEL2_ TX_VCO_SEL2 9V3_VCO 9V3_VCO SPI_MOSI SPI_MOSI_IN VCO_UHF1 VCTRL SPI_MISO SPI_MISO_IN VCTRL...

  • Page 142

    UHF1 (403-470 MHz) 25 - 40W PCB / Schematics / Parts List E0400 RF_ATTEN_1_3 9R1_FILT E0401 RF_ATTEN_1 C0400 R0401 Q0400 9R1_FE_6 220pF C0403 C0402 C0401 Q0401 47pF 220pF 0.1uF R0402 R0403 C0404 R0431 220pF C0405 Hi-Side Zeros for Preselector 220pF C0455 (Micro-strip 20 mm Each) 0.1uF...

  • Page 143

    UHF1 (403-470 MHz) 25 - 40W PCB / Schematics / Parts List E0500 R0511 1.2K 5V_BE_5 R0500 C0514 5.1K 0.10uF C0513 R0501 0.10uF R0502 VHF -- 44.85MHz R0512 UHF -- 73.35MHz R0503 IF_OUT C0502 1.6V 4-POLE 1.43V L0506 R0509 820nH 0.10uF IF_TO_ABACUS C0504...

  • Page 144

    UHF1 (403-470 MHz) 25 - 40W PCB / Schematics / Parts List VVCO U602 TEST_POINT TP0600 C0601 SPF_3.5V TEST_POINT C0602 C0603 C0604 .01uF 220pF 0.10uF 43pF R0601 C0605 TP0601 C0650 R0621 30pF TEST_POINT R0602 43pF IF_OUT C0607 18pF R0623 R0622 Q0600 2nd LO LF C0610...

  • Page 145

    UHF1 (403-470 MHz) 25 - 40W PCB / Schematics / Parts List 2743019447 PA_SUPPLY_TX_PA PA_SUPPLY E0700 R0776 C0700 C0701 C0702 C0703 C0704 C0705 C0706 C0707 C0708 C0709 C0711 E0701 R0742 30pF .022uF 2200pF 30pF .022u F 1000pF 1000pF 0.1uF C0712 1000pF 2 7 43019447 C0713...

  • Page 146

    UHF1 (403-470 MHz) 25 - 40W PCB / Schematics / Parts List 3-10 SH 0900 SH 0901 SHIELD SHIELD NOTE: VOLTAGES SHOWN FOR ANALOG TX MODE SW_9V1 1.0V or less, typical TP0907 C0919 C0920 R0918 Q0902 R0910 0.1uF 220pF C0929 R0913 220pF C091 7...

  • Page 147

    UHF1 (403-470 MHz) 25 - 40W PCB / Schematics / Parts List 3-11 5V_BE_SYNTH 5V_BE 5V_TH R0100 5V_SYNTH SPI_MOSI_IN SPI_MOSI_OUT SPI_MOSI_IN SPI_MOSI_OUT SPI_MISO_IN SPI_MISO_OUT SPI_MISO_OUT SPI_MISO_IN SPI_CLK_IN SPI_CLK_OUT 2.8V_DIG SPI_CLK_I SPI_CLK_OUT R0101 2.8V_TH_DIG_SYNTH 2.8V_TH_DIG ABACUS3_SYNCB_I N ABACUS3_SYNCB_OUT ABACUS3_SYNCB_I N ABACUS3_SYNCB_OUT ABACUS3_CEX_IN ABACUS3_CEX_OUT ABACUS3_CEX_I N...

  • Page 148

    UHF1 (403-470 MHz) 25 - 40W PCB / Schematics / Parts List 3-12 SF_TH SF_TH_VCO_UHF1_6 SF_TH SF_TH C0200 C0201 Super Filter Voltage (SF_TH) 220pF 0.10uF SF_TH: 2.5 V SH0300 SH0301 SHIELD SHIELD R0201 L0202 3.3K 470nH C0204 220pF C0205 C0206 R0204 0.10uF 220pF...

  • Page 149

    UHF1 (403-470 MHz) 25 - 40W PCB / Schematics / Parts List 3-13 TX Buffer Amplifier SF_TH R0321 L030 0 C0300 C0301 SF_TH VMOD 220pF 0.10uF 220nH 2.7K C030 2 C0303 .01uF 220pF R0320 R0301 R0302 R0303 L0302 51 0 3.3K 470nH C0304...

  • Page 150

    UHF1 (403-470 MHz) 25 - 40W PCB / Schematics / Parts List 3-14 UHF1 PCB 8486777Z12 Parts List 25-40W Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Part No. Part No. Part No. Circuit Motorola Description Part No. C0156 2185419D06 0.1uF...

  • Page 151

    UHF1 (403-470 MHz) 25 - 40W PCB / Schematics / Parts List 3-15 Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Part No. Part No. Part No. Part No. C0427 2115153H49 47pF C0615 2113945B02 .01uF C0717...

  • Page 152

    UHF1 (403-470 MHz) 25 - 40W PCB / Schematics / Parts List 3-16 Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Part No. Part No. Part No. Part No. C0925 2113944A44 220pF D0702 4802482J02 DIODE, PIN...

  • Page 153

    UHF1 (403-470 MHz) 25 - 40W PCB / Schematics / Parts List 3-17 Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Part No. Part No. Part No. Part No. R0115 0613952R66 R0303 0613952Q66 R0430 0613952R01 R0722 0613952H89 4.7K...

  • Page 154

    UHF1 (403-470 MHz) 25 - 40W PCB / Schematics / Parts List 3-18 Circuit Motorola Circuit Motorola Description Description Part No. Part No. R0907 0613952R66 SH0101 2615362H01 SHIELD R0909 0613952R16 SH0300 2615362H01 SHIELD R0910 0613952H73 SH0301 2615362H01 SHIELD R0911 0613952Q61...

  • Page 155

    DGR 6175 MOTOTRBO Repeater Chapter 6 VHF (136-174 MHz) 25-45W Service Information Issue: June, 2007...

  • Page 156

    Motorola. Furthermore, the purchase of Motorola products shall not be deemed to grant either directly or by implication, estoppel, or otherwise, any license under the copyrights, patents or patent applications of Motorola, except for the normal non-exclusive license to use that arises by operation of law in the sale of a product.

  • Page 157: Vhf High Power Service Information

    Chapter 6 - VHF High Power Service Information Table of Contents Section 1 Theory of Operation 1.0 Introduction ......................1-1 1.1 Receiver ......................1-2 1.2 Transmitter .....................1-2 1.3 Repeater Indicator Board ................1-2 1.4 Connector Board ....................1-3 1.5 Fan .........................1-4 1.6 AC/DC Power Supply ..................1-4 2.0 Repeater Interconnections and Cables..............1-5 3.0 Mobile Radio’s Theory of Operation ..............1-6 3.1 VHF (136-174 MHz) Receiver Circuitry ............1-6...

  • Page 158

    Section 3 VHF PCB/Schematics/Parts Lists 1.0 Allocation of Schematics and Circuit Boards ............3-1 1.1 Controller Circuits................... 3-1 2.0 VHF (136-174 MHz) 25 - 45W PCB / Schematics / Parts List ......3-3 VHF (136-174 MHz) 25-45W 8478023A12 Top Side ..........3-3 VHF (136-174 MHz) 25-45W 8478023A12 Bottom Side........

  • Page 159

    Section 1 THEORY OF OPERATION Introduction The MOTOTRBO repeater consists of two MOTOTRBO mobile radios; one to act as a receiver, and one to act as a transmitter and controller. Both of these radios contain specialized software that allows them to function together as a repeater. The Repeater also contains a Repeater Indicator board and a Connector board.

  • Page 160

    Introduction Receiver The receiver uses a transceiver board which is based on the mobile radio's transceiver board. The board uses the same PCB as the mobile radio board, but is populated differently to work in the Repeater application. Only the receiver related functions of the board are utilized in this application, even though the circuitry for transmit also exists on the board.

  • Page 161

    Introduction The Repeater Disable LED is a dual-purpose LED that is hardware controlled initially at power-up. As soon as VBUS power is available on the Repeater Indicator board, the hardware circuitry for the Repeater Disable LED will cause it to blink periodically. When the software initialization is completed by the firmware, the blink circuitry will get disabled by the firmware.

  • Page 162

    Introduction The fan control logic is provided by the fan controller IC (U51). This is a device from Cypress Semiconductor. There are basically two functions provided by the fan controller. First, it provides a PWM output based on a temperature input, and secondly, it provides detection of fan failure based on the fan tachometer reading.

  • Page 163

    Repeater Interconnections and Cables Repeater Interconnections and Cables Figure 1-4 shows the Cable interconnections inside the Repeater. Display Driver USB to Ethernet Interface Backup Option Option Repeater Repeater Mobile Mic Mobile Mic Board Board Interface Interface Port (MMP) Port (MMP) Interface Interface Front Connector...

  • Page 164

    Mobile Radio’s Theory of Operation Eleven conductor flex cable. Provides the SSI connection between the transmit and receive radios. Refer to Section for more details on this interface. Thirty conductor flex cable. Provides the connection from the transmit radio to the Repeater Indicator board and includes SPI signals to drive the LED indicators, RTC backup supply, and the interface to the Ethernet controller.

  • Page 165

    Mobile Radio’s Theory of Operation The signal next reaches the pre-selector filter, which is a 2-pole varactor-tuned filter with 5 zeros that are optimized to provide image frequency rejection. This filter, and the similarly designed post- selector filter, provide over 75 dB of image response rejection. The 3 dB bandwidth for both filters varies across the band with a minimum of 32 MHz at 136 MHz and a maximum of 38 MHz around 174 MHz.

  • Page 166

    Mobile Radio’s Theory of Operation The Abacus III accepts the 44.85 MHz signal, processes it, and sends out baseband I/Q data in 16- bit format to the DSP at a 20 kHz rate. Internal to the Abacus III is an LNA and 16 dB FE attenuator, an internal integer-N synthesizer used to control the external 2nd LO VCO, a Sigma-Delta ADC and decimation filter, and control and formatting logic for outputting the baseband I/Q data.

  • Page 167

    Mobile Radio’s Theory of Operation VHF (136-174 MHz) Transmitter Circuitry - 45 Watt The Transmitter consists of the power amplifier circuitry and the power control circuitry. The power amplifier is responsible for delivering a faithful replica of the VCO output amplified up to the desired output power level, free from distortion.

  • Page 168

    1-10 Mobile Radio’s Theory of Operation Notes 3.2.3 Pre-Driver Stage The next stage is a low power LDMOS device (RD01MUS1, Q0705), which delivers up to +27 dBm power to the driver stage. Its gain is controlled by varying the gate bias voltage and varies from low gain up to approximately 14 dB power gain.

  • Page 169

    Mobile Radio’s Theory of Operation 1-11 3.2.6 Antenna Switch The Antenna Switch (TR switch) has two modes of operation, transmit and receive. Transmit mode: The antenna switch utilizes the existing dc feed (A+) to the final stage device (Q0702). Both PIN diodes, D0700 and D0702, are turned on during key-up by forward biasing them.

  • Page 170

    1-12 Mobile Radio’s Theory of Operation An abnormally high reflected power level, such as may be caused by a damaged antenna, also causes an increase in the difference amplifier output voltage. An increased difference amplifier output causes a reduction in attenuation by the VCA. As a result, the increased RF signal applied to the log detector/controller causes the controller to reduce the gain of PA stages Q0703 and Q0705.

  • Page 171

    Mobile Radio’s Theory of Operation 1-13 3.2.11 Thermal Protection Thermistor RT0908 and R0902 form a voltage divider with the output proportional to the sensed circuit board temperature in the vicinity of the transmitter driver and final devices. The voltage divider output is routed to operational amplifier U0901-2, which provides a dc voltage via diode junction D0900 to control the attenuation level of the VCA stage.

  • Page 172

    1-14 Mobile Radio’s Theory of Operation 3.3.2 Fractional-N Synthesizer The Tomahawk II Synthesizer IC (U0100) consists of a pre-scaler, a programmable divider and divider control logic, phase detector, charge pump, a D/A converter in the high frequency analog modulation path, an attenuator to balance the high and low frequency modulation paths, a serial interface for control (SPI), a serial interface for modulation (SSI), and a super filter for the regulated 2.45 Volts.

  • Page 173

    Mobile Radio’s Theory of Operation 1-15 3.3.3 Voltage Controlled Oscillator (VCO) The Voltage Controlled Oscillator (VCO) subsystem consists of three Colpitts oscillators (two Rx and one Tx), a single-stage Tx buffer amplifier, a single-stage Rx buffer amplifier, oscillator bias control switches, and the modulation circuitry.

  • Page 174

    1-16 Mobile Radio’s Theory of Operation A discrete single-stage Tx buffer amplifier (comprised of the NPN transistor Q0302 and surrounding components) amplifies the signal from the Tx oscillator to the level required by the first stage of the Transmitter Power Amplifier (U0700). The Tx buffer amplifier also provides sufficient isolation from any undesired load-pulling from the Transmitter Power Amplifier.

  • Page 175

    Mobile Radio’s Theory of Operation 1-17 Modulation is performed by applying a digital data stream via the SSI bus from the DSP (U1000) to the synthesizer (U0100). In order to meet spurious and phase noise requirements, the PLL bandwidth was designed to be narrower than the full modulation bandwidth, therefore requiring the use of dual-port modulation.

  • Page 176

    1-18 Mobile Radio’s Theory of Operation Notes...

  • Page 177

    Section 2 TROUBLESHOOTING CHARTS Troubleshooting Flow Chart for Receiver (Sheet 1 of 3) All Troubleshooting within NO RX AUDIO the dotted line is done on the TX Brick Set up radio in Analog Volume Receive mode on Audio at pin 6 Audio at pin 10 level desired channel...

  • Page 178

    Troubleshooting Flow Chart for Receiver Troubleshooting Flow Chart for Receiver (Sheet 2 of 3) Voltage level +9.0 VDC Check biasing on > 2.7 VDC on pin 4 Q0403 before replacing on D0401? of Q0403? Check circuitry around D0401 and D0403 for shorts and opens Voltage Check Synthesizer...

  • Page 179

    Troubleshooting Flow Chart for Receiver Troubleshooting Flow Chart for Receiver (Sheet 3 of 3) All Troubleshooting on this page is done on the RX Brick 3.0 VDC Check Controller 5.0 VDC on pin 1 Troubleshooting at E0610? 16.8 MHz Check Synthesizer of U0601? Flow Chart present...

  • Page 180: Troubleshooting Flow Chart For 45w Transmitter

    Troubleshooting Flow Chart for 45W Transmitter Troubleshooting Flow Chart for 45W Transmitter NO TRANSMITTER POWER Does Is TP0909 TP0702 = Check 9V3_PA Regulator in >1 VDC? 9.3 VDC? Controller Troubleshooting Flow Chart Is D0702 Check 9.3 V Regulator Is TP0913 Check T/R bias circuit ~12.4 VDC? circuit...

  • Page 181

    Troubleshooting Flow Chart for Synthesizer Troubleshooting Flow Chart for Synthesizer Start Visual check of Correct the Board OK? Problem +2.45 V at Are C0136, C0137 Replace U0100 C0137 OK? (SF_OUT)? Check 5 V +5 V at R0100? Regulator U3002 Replace or resolder components +2.775 V at...

  • Page 182

    Troubleshooting Flow Chart for Tx VCO (Sheet 1 of 2) Troubleshooting Flow Chart for Tx VCO (Sheet 1 of 2) No TX VCO signal at C0318 No TX VCO signal at C0318 Visual check Visual check Correct problem Correct problem of board of board Correct problem...

  • Page 183

    Troubleshooting Flow Chart for Tx VCO (Sheet 1 of 2) Troubleshooting Flow Chart for Tx VCO (Sheet 2 of 2) Tx VCO locked but no Tx VCO not locked high-port modulation at correct frequency Check R0321, R0320, Check R0321, R0320, R0319, ~2.1 VDC at DC Voltage R0319, and CR0300...

  • Page 184

    Troubleshooting Flow Chart for Rx VCO (Sheet 1 of 2) Troubleshooting Flow Chart for Rx VCO (Sheet 1 of 2) No Rx VCO signal at C0218 Visual check Correct problem of board Correct problem Radio did not boot up 9 VDC at E0201? Radio did not boot up properly or check properly or check...

  • Page 185

    Troubleshooting Flow Chart for Rx VCO (Sheet 1 of 2) Troubleshooting Flow Chart for Rx VCO (Sheet 2 of 2) Rx VCO not locked at correct frequency Rx VCO not locked DC Voltage Check Synthesizer at R0211 Check Synthesizer Troubleshooting between 0.6 Troubleshooting Flow Chart...

  • Page 186

    2-10 Troubleshooting Flow Chart for Rx VCO (Sheet 1 of 2) Notes...

  • Page 187

    Section 3 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

    Allocation of Schematics and Circuit Boards Notes...

  • Page 189

    VHF (136-174 MHz) 25 - 45W PCB / Schematics / Parts List VHF (136-174 MHz) 25 - 45W PCB / Schematics / Parts List C3018 J3000 VR4004 J4000 C0704 C4048 R4050 C0707 C0710 C3006 E4005 C4075 Q4013 C0708 VR4000 VR4005 VR4003 VR4001 VR4002...

  • Page 190

    VHF (136-174 MHz) 25 - 45W PCB / Schematics / Parts List R3548 R3529 C6436 D4000 C6437 R4035 R6434 C3533 E6400 R4049 C3045 Q4009 L0714 R6432 C3534 C6413 C0724 C0725 R0973 Q4012 C0822 C6412 C0803 L0904 C0943 Q4014 Q4007 Q4003 Q4001 L0729 D0905...

  • Page 191

    VHF (136-174 MHz) 25 - 45W PCB / Schematics / Parts List PA_SUPPLY RAW_B+ 9V3_PA 9V3_PA 5V_SW 1.875V_DIG_V2 1.8V_TH_DIG 2.775V_DIG_V4 2.8V_TH_DIG RX_VCO_SEL1_ RX_VCO_SEL1 2.775V_ANA_V7 2.8V_TH_ANA RX_VCO_SEL2_ RX_VCO_SEL2 TX_VCO_SEL1_ TX_VCO_SEL1 9V3_SYNTH_IN 9V3_SYNTH SPI_BUS(0:4) TX_VCO_SEL2_ 9V3_VCO 9V3_VCO SPI_MOSI SPI_MOSI_IN VCO_VHF SPI_MISO SPI_MISO_IN VCTRL VCTRL TXINJ...

  • Page 192

    VHF (136-174 MHz) 25 - 45W PCB / Schematics / Parts List 9R1_FILT 10 dB Attenuator ON @ High for RF_ATTEN_1 E0400 E0401 RF_ATTEN_1_8 BK1005HM471 RF_ATTEN_1 9R1_FE_7 R0401 Q0400 C0400 BK1005HM471 1500pF E0404 BK1005HM471 9V3_TX_SW_8 C0403 C0401 C0402 51pF 0.1uF Q0401 1500pF 9V3_TX_SW...

  • Page 193

    VHF (136-174 MHz) 25 - 45W PCB / Schematics / Parts List E0500 BK1005HM471 R0511 1.2K 5V_BE_5 R0500 5.1K C0514 C0513 0.10uF R0501 0.10uF R0502 VHF -- 44.85MHz R0512 UHF -- 73.35MHz C0502 R0503 0.10uF 1.6V IF_TO_ABACUS 4-POLE 1.43V C0512 L0506 C0504 IF_OUT...

  • Page 194

    VHF (136-174 MHz) 25 - 45W PCB / Schematics / Parts List VVCO U602 C0601 TEST_POINT TP0600 SPF_3.5V TEST_POINT 43pF C0602 C0603 C0604 .01uF 220pF 0.10uF R0601 TP0601 C0650 R0621 TEST_POINT 30pF R0602 IF_OUT C0605 43pF C0607 2nd LO LF Q0600 18pF R0622...

  • Page 195

    VHF (136-174 MHz) 25 - 45W PCB / Schematics / Parts List 2743019447 PA_SUPPLY_TX_PA PA_SUPPLY E0700 C0700 C0701 C0704 C0705 C0706 C0707 C0712 C0708 C0709 C0702 C0703 C0711 C0738 C0710 E0701 R0742 33pF .033uF .033uF 1000pF 3000pF 3000pF 470pF 1000pF 0.1uF 1000pF 33pF...

  • Page 196

    VHF (136-174 MHz) 25 - 45W PCB / Schematics / Parts List 3-10 SH0900 SH0901 SHIELD SHIELD 9V3_PC TP0907 1.0V or less, typical R0918 C0919 C0920 0.1uF 1500pF C0929 C0917 R0910 1500pF 1000pF R0921 Q0902 2.2K R0913 TP0913 9V3_PC C0911 R0960 1500pF 2.4K...

  • Page 197

    VHF (136-174 MHz) 25 - 45W PCB / Schematics / Parts List 3-11 5V_BE_SYNTH 5V_BE 5V_TH R0100 5V_SYNTH SPI_MOSI_IN SPI_MOSI_OUT SPI_MOSI_IN SPI_MOSI_OUT SPI_MISO_IN SPI_MISO_OUT SPI_MISO_IN SPI_MISO_OUT SPI_CLK_IN SPI_CLK_OUT 2.8V_DIG SPI_CLK_IN SPI_CLK_OUT R0101 2.8V_TH_DIG_SYNTH 2.8V_TH_DIG ABACUS3_SYNCB_IN ABACUS3_SYNCB_OUT ABACUS3_SYNCB_IN ABACUS3_SYNCB_OUT ABACUS3_CEX_IN ABACUS3_CEX_OUT ABACUS3_CEX_IN ABACUS3_CEX_OUT 1V8_BE_SYNTH...

  • Page 198

    VHF (136-174 MHz) 25 - 45W PCB / Schematics / Parts List 3-12 SH0200 SHIELD SF_TH SF_TH_VCO_UHF1_6 SF_TH SF_TH C0200 C0201 Super Filter Voltage (SF_TH) 1500pF 0.10uF SF_TH: 2.5V R0201 2.4K L0202 680nH C0204 1500pF C0205 C0206 R0204 0.10uF 1500pF 4.3K R0205 C0208...

  • Page 199

    VHF (136-174 MHz) 25 - 45W PCB / Schematics / Parts List 3-13 R0337 TX Buffer Amplifier E0301 L0300 R0321 9V3_VCO_UHF1_7 220nH C0300 C0301 SF_TH 9V3_VCO 1500pF 0.10uF Super Filter Voltage (SF_TH) SF_TH: 2.5V C0302 C0303 1500pF .01uF C0332 R0303 R0320 R0301 R0302...

  • Page 200

    VHF (136-174 MHz) 25 - 45W PCB / Schematics / Parts List 3-14 VHF PCB 8478023A12 Parts List 25-45W Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Part No. Part No. Part No. Circuit Motorola Description Part No. C0156 2185419D06 0.1uF...

  • Page 201

    VHF (136-174 MHz) 25 - 45W PCB / Schematics / Parts List 3-15 Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Part No. Part No. Part No. Part No. C0439 2113945A10 1500pF C0623 2113945Y02 0.10uF C0725...

  • Page 202

    VHF (136-174 MHz) 25 - 45W PCB / Schematics / Parts List 3-16 Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Part No. Part No. Part No. Part No. C0950 2113945A09 1000pF E0610 2480640Z01 FERRITE BEAD...

  • Page 203

    VHF (136-174 MHz) 25 - 45W PCB / Schematics / Parts List 3-17 Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Part No. Part No. Part No. Part No. R0140 NOT PLACED R0327 0613952R01 R0440 0613952Q32...

  • Page 204

    VHF (136-174 MHz) 25 - 45W PCB / Schematics / Parts List 3-18 Circuit Motorola Circuit Motorola Description Description Part No. Part No. R0915 0613952R22 SP0704 1015349H01 SOLDER_PREFORM R0916 0613952Q49 SP0705 1015349H01 SOLDER_PREFORM R0917 0613952H91 5.6K SP0706 1015349H01 SOLDER_PREFORM R0918...

  • Page 205

    To register for online access: • Have your Motorola Customer number available. • Please go to http://www.motorola.com/businessonline and click on “Sign Up Now.” • Complete form and submit it. • Contact your BDM to complete set-up and it will be done within 24 to 48 hours.

  • Page 206

    Replacement Parts Ordering: Motorola Online Notes...

  • Page 207

    If a unit requires further complete testing, knowledge and/or details of component level troubleshooting or service than is customarily performed at the basic level, please send the radio to a Motorola Service Center as listed below. Motorola de México, S.A.

  • Page 208

    Motorola Service Centers: Motorola de Colombia, Ltd. Notes...

  • Page 209

    An electric current passed through the liquid causes the crystals to align so that light cannot pass through them. Light Emitting Diode: An electronic device that lights up when electricity is passed through it. Motorola Digital Communications.

  • Page 210

    Glossary-2 Term Definition Megahertz: One million cycles per second. Used especially as a radio- frequency unit. Paging One-way communication that alerts the receiver to retrieve a message. PC Board Printed Circuit Board. Also referred to as a PCB. Private-Line Tone Squelch: A continuous sub-audible tone that is transmitted along with the carrier.

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