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Motorola GP328 Detailed Service Manual
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Motorola GP328 Detailed Service Manual

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Download this manual See also: Operating Manual, User Manual
GP328/GP338
Portable Radios
Detailed Service Manual
6804110J64-F
June, 2002

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Summary of Contents for Motorola GP328

  • Page 1 GP328/GP338 Portable Radios Detailed Service Manual 6804110J64-F June, 2002...

  • Page 2: Computer Software Copyrights

    Motorola. Furthermore, the purchase of Motorola products shall not be deemed to grant, either directly or by implica- tion, estoppel or otherwise, any license under the copyrights, patents or patent applications of Motorola, except for the...
  • Page 3 ©1999, 2000, 2001, 2002 by Motorola, Inc. Motorola Technology Sdn. Bhd. (Co. No. 455657-H) Bayan Lepas FIZ Phase III 11900 Penang, Malaysia Printed in Malaysia June, 2002...

  • Page 5: Safety And General Information

    Compliance with RF Energy Exposure Standards Your Motorola two-way radio is designed and tested to comply with a number of national and international standards and guidelines (listed below) regarding human exposure to radio frequency electromagnetic energy.

  • Page 6: Approved Accessories

    Use only Motorola approved supplied batteries or Motorola approved replacement batteries. Use of non-Motorola-approved antennas or batteries may exceed FCC RF exposure guidelines. Approved Accessories For a list of approved Motorola accessories please contact your dealer, or local Motorola representative. ELECTROMAGNETIC INTERFERENCE/COMPATIBILITY NOTE Nearly every electronic device is susceptible to electromagnetic interference (EMI) if inadequately shielded, designed, or otherwise configured for electromagnetic compatibility.

  • Page 7: Operational Warnings

    OPERATIONAL WARNINGS For Vehicles With an Air Bag Do not place a portable radio in the area over an air bag or in the air bag deployment area. Air W A R N I N G bags inflate with great force. If a portable radio is placed in the air bag deployment area and the air bag inflates, the radio may be propelled with great force and cause serious injury to occupants of the vehicle.

  • Page 9: Table Of Contents

    Table of Contents Introduction Section 1 1.0 Scope of Manual....................1-1 2.0 Warranty and Service Support................1-1 2.1 Warranty Period ..................... 1-1 2.2 After Warranty Period..................1-1 2.3 Piece Parts ..................... 1-2 2.4 Technical Support ..................1-2 Section 2 Service Aids 1.0 Recommended Test Tools...................
  • Page 10 Controller ASFIC/ON_OFF Schematic Diagram...........4-18 Controller Micro Processor Schematic Diagram ...........4-19 Controller Memory Schematic Diagram ..............4-20 Controller Audio Power Amplifier Schematic Diagram..........4-21 Controller Interface Schematic Diagram ...............4-22 3.6 Controller Schematics (136-174MHz) for PCB 8486062B16......4-23 Complete Controller Schematic Diagram..............4-23 Controller ASFIC/ON_OFF Schematic Diagram...........4-24 Controller Micro Processor Schematic Diagram ...........4-25 Controller Memory Schematic Diagram ..............4-26 Controller Audio Power Amplifier Schematic Diagram..........4-27...
  • Page 11 UHF Controls And Switches Schematic Diagram ..........6A-17 UHF Receiver Front End Schematic Diagram............6A-18 UHF Receiver Back End Schematic Diagram ............6A-19 UHF Synthesizer Schematic Diagram ..............6A-20 UHF Voltage Controlled Oscillator Schematic Diagram ........6A-21 UHF Transmitter Schematic Diagram ..............6A-22 UHF Radio Parts List..................6A-23 8.0 Circuit Board/Schematic Diagrams and Parts List...........6A-26 UHF (403-470MHz) Main Board Top Side PCB No.
  • Page 12 viii VHF Receiver Front End Schematic Diagram ........... 6B-20 VHF Receiver Back End Schematic Diagram............ 6B-21 VHF Synthesizer Schematic Diagram..............6B-22 VHF Voltage Controlled Oscillator Schematic Diagram........6B-23 VHF Transmitter Schematic Diagram ..............6B-24 VHF Radio Parts List ..................6B-25 8.0 Circuit Board/Schematic Diagrams and Parts List ..........
  • Page 13 UHF Band 2 Transmitter Schematic Diagram ........... 6C-20 UHF Band 2 Radio Parts List ................6C-21 8.0 Circuit Board/Schematic Diagrams and Parts List.......... 6C-25 UHF Band 2 (450-527MHz) Main Board Top Side PCB No. 8485641Z06..6C-25 UHF Band 2 (450-527MHz) Main Board Bottom Side PCB No. 8485641Z06 .. 6C-26 UHF Band 2 Controls And Switches Schematic Diagram .........
  • Page 14 8.0 Circuit Board/Schematic Diagrams and Parts List .......... 6D-24 330-400MHz Main Board Top Side PCB No. 8485726Z04 ....... 6D-24 330-400MHz Main Board Bottom Side PCB No. 8485726Z04 ......6D-25 330-400MHz Controls And Switches Schematic Diagram......... 6D-26 330-400MHz Receiver Front End Schematic Diagram ........6D-27 330-400MHz Receiver Back End Schematic Diagram ........
  • Page 15 8.0 Troubleshooting charts ..................6E-25 Troubleshooting Flow Chart for Controller ............6E-25 Troubleshooting Flow Chart for Receiver (Sheet 1 of 2) ........6E-26 Troubleshooting Flow Chart for Receiver (Sheet 2 of 2) ........6E-27 Troubleshooting Flow Chart for Transmitter ............6E-28 Troubleshooting Flow Chart for Synthesizer ............6E-29 Troubleshooting Flow Chart for VCO ..............6E-30 Flex Layout/Schematic Diagrams and Parts Lists Section 7...

  • Page 17: Scope Of Manual

    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 18: Piece Parts

    Aftermarket Division (AAD). If no part number is assigned, the part is not normally available from Motorola. If the part number is appended with an asterisk, the part is serviceable by Motorola Depot only. If a parts list is not included, this generally means that no user-serviceable parts are available for that kit or assembly.

  • Page 19: Service Aids

    Section 2 SERVICE AIDS Recommended Test Tools Table 2-1 lists the tools recommended for working on this family of radios. These tools are also available from Motorola. Table 2-1: Recommended Test Tools Motorola Part No. Description Application 6680387A59 Extractor, 2-contact...
  • Page 20 Recommended Test Tools...

  • Page 21: Power Up Self-Test

    Section 3 POWER UP SELF-TEST Error Codes Turning on the radio using the on/off volume control starts a self-test routine which checks the RAM, ROM checksum, EEPROM hardware and EEPROM checksum. If these checks are successfully completed, the radio will generate the Self-Test Pass Tone. If the self-test is not successful, a “bonk” is heard.
  • Page 22 Error Codes...

  • Page 23: Controller Information

    Section 4 CONTROLLER INFORMATION Overview This section provides a detailed theory of operation for the radio and its components. Radio Power Distribution Accessories 20 pin Connector Keypad/Option Board Prime Expansion Board Switching Reg. Audio PA Int/Ext Vdd 4.0V/3.3V Vdda UNSWB+ Vdda Reg.

  • Page 24: Controller Board

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

  • Page 25: Digital Architecture

    Controller Board Digital Architecture MCU configuration There is one common MCU architecture for low-tier as well as for the high-tier products. It covers the Conventional and Trunking portables. An open architecture system with the new HC11FL0 as the processor is used. Combinations of different size RAM, ROM and EEPROM are available for various application software.
  • Page 26 Controller Board ModB/Vstby Supply Under various conditions, the supply to the ModB/Vstby would vary. Table 4-1 shows these conditions and circuits in operation. Table 4-1: ModB/Vstby Supply Modes Condition Circuit Operation Radio On Vdd supply voltage via CR411 Radio Off •...

  • Page 27: Controller Schematics (330-400Mhz For 8485726Z01, 403-470Mhz For 8480450Z03 & 450-527Mhz For 8485641Z02)

    Controller Schematics (330-400MHz for 8485726Z01, 403-470MHz for 8480450Z03 & 450-527MHz for 8485641Z02) TO/FROM RF IF_RED_LED_CTRL RED_LED RED_LED IF_GREEN_LED_CTRL GREEN_LED GREEN_LED IF_SB1_CTRL AUDIO IF_SB2_CTRL IF_SB3_CTRL INT_MIC 4V_3.3V 4V_3.3V IF_EMER_CTRL EMER EMER IF_RTA0_CTRL EXT_MIC Vddd Vddd RTA0 RTA0 IF_RTA1_CTRL RTA1 RTA1 IF_RTA2_CTRL EXT_SPKR_SEL DEMOD DEMOD...

  • Page 28: Controller Asfic/On_Off Schematic Diagram

    4V_3.3V R405 R402 SWB+ Vddd Q400 TP406 BATT_CODE Vddd UNSWB+ C401 C400 0.1uF R401 .01uF R406 R427 2.7K U400 C402 LP2951ACMM-3.3 0.1uF C403 CR412 10uF INPUT OUTPUT FEEDBACK ERROR BATT_DATA_IN INT_EXT_Vdd SHUTDOWN SENSE TP410 C408 VTAP Q405 R407 100pF C409 0.1uF Vdda RESET...

  • Page 29: Controller Micro Processor Schematic Diagram

    Vddd F1200 R457 R409 SCI_TX SCI_RX TP401 TP402 TEST_POINT TEST_POINT R418 UNSWB+ Vddd Vddd Vddd R437 C431 C449 C453 C423 100pF 100pF 100pF 100pF L411 390nH U410 L410 ILC7062CM-33 3.3V 390nH C456 R411 VOUT 3 100pF C434 EE_CS 0.1uF R461 C435 R460 0.1uF...
  • Page 30 Vddd C425 C426 0.1uF 100pF U405 SRM2B256 RAM_CS R428 FLASH_OE Vddd C424 10uF R410 100K C429 0.1uF R478 XA18 U406 AT49BV020 R408 FLASH_EN EN_CE R492 EN_OE EN_WE XA18...

  • Page 31: Controller Audio Power Amplifier Schematic Diagram

    SWB+ UNSWB+ OPT_SEL2 R450 C475 OPT_SEL1 10uF VR446 VR447 VR448 VR449 VR445 10.0V 10.0V 10.0V 10.0V 10.0V R473 C471 C472 J403 100pF 100pF C442 C473 20 PIN CONNECTOR U420 0.1uF 100pF R423 J403-1 TDA8547 C447 VCC1 VCC2 J403-2 R472 INT_SPK+ 0.1uF IN1POS OUT1POS...
  • Page 32 C466 100pF C458 100pF R481 C459 100pF J400 40-PINS CONNECTOR EXT_MIC J400-40 EXT_MIC VS_CS J400-39 VS_CS SWB+ J400-38 SW_B+ E400 Vddd Vddd J400-37 VS_AUDSEL VS_AUDSEL J400-36 FLAT_RX_SND J400-35 Det_Aud_Snd RX_AUD_RTN J400-34 Rx_Aud_Rtn C467 TX_AUD_SND Tx_Aud_Snd J400-33 C481 0.1uF TX_AUD_RTN Tx_Aud_Rtn J400-32 C482 0.1uF...

  • Page 33: Controller Schematics (330-400Mhz For 8485726Z04, 403-470Mhz For 8480450Z13 & 450-527Mhz For 8485641Z06)

    4-11 Controller Schematics (330-400MHz for 8485726Z04, 403-470MHz for 8480450Z13 & 450-527MHz for 8485641Z06) TO/FROM RF RED_LED IF_RED_LED_CTRL RED_LED GREEN_LED IF_GREEN_LED_CTRL GREEN_LED IF_SB1_CTRL AUDIO IF_SB2_CTRL IF_SB3_CTRL 4V_3.3V INT_MIC 4V_3.3V EMER IF_EMER_CTRL EMER RTA0 IF_RTA0_CTRL Vddd EXT_MIC RTA0 Vddd RTA1 IF_RTA1_CTRL RTA1 RTA2 DEMOD EXT_SPKR_SEL...

  • Page 34: Controller Asfic/On_Off Schematic Diagram

    4-12 4V_3.3V R405 R402 TP410 SWB+ Vddd Q400 TP406 BATT_CODE Vddd UNSWB+ C405 C401 C400 0.1uF 800MHz only R401 .01uF 100pF R406 R427 2.7K U400 LP2951ACMM-3.3 C402 C403 CR412 0.1uF 2.2uF Vdda INPUT OUTPUT R407 FEEDBACK ERROR BATT_DATA_IN INT_EXT_Vdd SHUTDOWN SENSE C410 VTAP...

  • Page 35: Controller Micro Processor Schematic Diagram

    4-13 Vddd F1200 R457 R409 SCI_TX SCI_RX TP401 TP402 TEST_POINT TEST_POINT R418 UNSWB+ Vddd Vddd Vddd R437 C431 C449 C423 C453 100pF 100pF 100pF 100pF L411 U410 390nH ILC7062CM-33 L410 3.3V 390nH R411 C456 VIN VOUT 100pF C434 EE_CS 0.1uF C435 R460 R461...
  • Page 36 Vddd C425 C426 0.1uF 100pF U405 SRM2B256 RAM_CS R428 FLASH_OE Vddd C424 10uF R410 100K C429 0.1uF R478 XA18 U406 R408 AT49HLV010 FLASH_EN EN_CE R492 EN_OE EN_WE FLASH ROM ZMY0130087-B XA18...

  • Page 37: Controller Audio Power Amplifier Schematic Diagram

    4-15 UNSWB+ OPT_SEL2 C475 SWB+ OPT_SEL1 VR445 VR446 VR447 10uF 10.0V 10.0V 10.0V VR449 10.0V VR448 R473 10.0V R450 J403 U420 C442 C471 20 PIN CONNECTOR R499 C472 R423 TDA8547 100pF 0.1uF C473 J403-1 100pF 20 11 100pF C447 R472 INT_SPK+ J403-2 0.1uF...

  • Page 38: Controller Interface Schematic Diagram

    4-16 C466 100pF C458 100pF C404 800 MHz only 100pF C459 100pF R481 C526 C527 100pF 100pF J400 40 - PIND CONNECTOR EXT_MIC J400-40 EXT_MIC J400-39 VS_CS VS_CS SWB+ J400-38 SW_B+ E400 Vddd J400-37 Vddd VS_AUDSEL J400-36 VS_AUDSEL FLAT_RX_SND J400-35 Det_Aud_Snd J400-34 RX_AUD_RTN...

  • Page 39: Controller Schematics (136-174Mhz For 8486062B09 & 8486062B12)

    4-17 Controller Schematics (136-174MHz for 8486062B09 & 8486062B12) TO/FROM RF IF_RED_LED_CTRL RED_LED RED_LED IF_GREEN_LED_CTRL GREEN_LED GREEN_LED IF_SB1_CTRL AUDIO IF_SB2_CTRL IF_SB3_CTRL INT_MIC 4V_3.3V 4V_3.3V IF_EMER_CTRL EMER EMER IF_RTA0_CTRL EXT_MIC Vddd Vddd RTA0 RTA0 IF_RTA1_CTRL RTA1 RTA1 IF_RTA2_CTRL EXT_SPKR_SEL DEMOD DEMOD RTA2 RTA2 IF_RTA3_CTRL RTA3...

  • Page 40: Controller Asfic/On_Off Schematic Diagram

    4-18 4V_3.3V R405 R402 SWB+ Vddd Q400 TP406 BATT_CODE Vddd UNSWB+ C401 C400 0.1uF R401 .01uF R406 R427 2.7K U400 C402 LP2951ACMM-3.3 0.1uF C403 CR412 10uF INPUT OUTPUT FEEDBACK ERROR BATT_DATA_IN INT_EXT_Vdd SHUTDOWN SENSE TP410 C408 VTAP Q405 R407 100pF C409 0.1uF Vdda...

  • Page 41: Controller Micro Processor Schematic Diagram

    4-19 Vddd F1200 R457 R409 SCI_TX SCI_RX TP402 TP401 TEST_POINT TEST_POINT R418 UNSWB+ Vddd Vddd Vddd R437 C431 C449 C453 C423 100pF 100pF 100pF 100pF L411 390nH U410 L410 ILC7062CM-33 3.3V 390nH R411 C456 VOUT 3 100pF C434 EE_CS 0.1uF R461 C435 R460...
  • Page 42 Vddd C425 C426 0.1uF 100pF U405 SRM2B256 RAM_CS R428 FLASH_OE Vddd C424 10uF R410 100K C429 0.1uF R478 XA18 U406 AT49BV020 R408 FLASH_EN EN_CE R492 EN_OE EN_WE XA18...

  • Page 43: Controller Audio Power Amplifier Schematic Diagram

    4-21 SWB+ UNSWB+ OPT_SEL2 R450 C475 OPT_SEL1 10uF VR446 VR447 VR448 VR449 VR445 10.0V 10.0V 10.0V 10.0V 10.0V R473 C471 C472 J403 100pF 100pF C442 C473 20 PIN CONNECTOR U420 0.1uF 100pF R423 J403-1 TDA8547 C447 VCC1 VCC2 J403-2 R472 INT_SPK+ 0.1uF IN1POS...
  • Page 44 C466 100pF C458 100pF R481 C459 100pF J400 40-PINS CONNECTOR EXT_MIC J400-40 EXT_MIC VS_CS J400-39 VS_CS SWB+ J400-38 SW_B+ E400 Vddd J400-37 Vddd VS_AUDSEL VS_AUDSEL J400-36 FLAT_RX_SND J400-35 Det_Aud_Snd RX_AUD_RTN J400-34 Rx_Aud_Rtn C467 TX_AUD_SND Tx_Aud_Snd J400-33 0.1uF C481 TX_AUD_RTN Tx_Aud_Rtn J400-32 C482 0.1uF...

  • Page 45: Controller Schematics (136-174Mhz) For Pcb 8486062B16

    4-23 Controller Schematics (136-174MHz) for PCB 8486062B16 TO/FROM RF IF_RED_LED_CTRL RED_LED RED_LED IF_GREEN_LED_CTRL GREEN_LED GREEN_LED TO_RF IF_SB1_CTRL Dual Vdd Single Vdd AUDIO IF_SB2_CTRL Regulator Scheme Regulator Scheme IF_SB3_CTRL 4V_3.3V 4V_3.3V INT_MIC EMER IF_EMER_CTRL EMER Prime IF_RTA0_CTRL Non Prime Prime Non Prime RTA0 RTA0 Vddd...

  • Page 46: Controller Asfic/On_Off Schematic Diagram

    4-24 4V_3.3V R405 R402 SWB+ Q400 Vddd TP406 BATT_CODE Vddd UNSWB+ C401 C400 0.1uF R401 .01uF R406 R427 2.7K U400 LP2951ACMM-3.3 C402 C403 0.1uF 2.2uF INPUT OUTPUT FEEDBACK ERROR BATT_DATA_IN INT_EXT_Vdd SHUTDOWN SENSE 1 K3 R407 VTAP Q405 CR412 R476 330K TP410 RESET...

  • Page 47: Controller Micro Processor Schematic Diagram

    4-25 Vddd F1200 R457 R409 SCI_TX SCI_RX TP402 TP401 TEST_POINT TEST_POINT R418 UNSWB+ Vddd Vddd Vddd R437 C431 C449 C453 C423 100pF 100pF 100pF 100pF L411 390nH U410 3.3V ILC7062CM-33 L410 390nH R411 C456 VOUT 100pF C434 EE_CS 0.1uF R461 C435 R460 0.1uF...

  • Page 48: Controller Memory Schematic Diagram

    4-26 FLASH ROM Controller Memory Schematic Diagram...

  • Page 49: Controller Audio Power Amplifier Schematic Diagram

    4-27 UNSWB+ OPT_SEL2 SWB+ C475 C474 OPT_SEL1 10uF .01uF VR447 10.0V VR448 VR449 C483 C484 10.0V 10.0V 470pF 470pF R473 R450 C471 J403 470pF C472 U420 C442 C473 20 PIN CONN 470pF R499 TDA8547 0.1uF 470pF R423 J403-1 20 11 C447 R472 J403-2...

  • Page 50: Controller Interface Schematic Diagram

    4-28 C466 100pF C458 100pF R481 C459 100pF J400 40 - PINS CONNECTOR EXT_MIC J400-40 EXT_MIC VS_CS J400-39 VS_CS SWB+ J400-38 SW_B+ E400 Vddd J400-37 Vddd VS_AUDSEL VS_AUDSEL J400-36 FLAT_RX_SND Det_Aud_Snd J400-35 RX_AUD_RTN Rx_Aud_Rtn J400-34 C467 TX_AUD_SND J400-33 Tx_Aud_Snd 0.1uF C481 Tx_Aud_Rtn TX_AUD_RTN...

  • Page 51: Controller Schematics

    4-29 Controller Schematics (29-42/35-50MHz) SWB+ Vdda MECH_SWB+ UNSWB+ RED_LED RED_LED LVZIF_SEL LVZIF_SEL GREEN_LED GREEN_LED DACRx DACRx RTA0 RTA0 DATA DATA CONTROLLER RTA1 RTA1 RTA2 RTA2 DEMOD DEMOD RTA3 RTA3 RSSI RSSI 16.8MHz 16.8MHz MODIN MODIN LOCK LOCK EMER EMER LI_ION LI_ION Controller Hierarchical Diagram...

  • Page 52: Complete Controller Schematic Diagram

    4-30 TO/FROM RF IF_RED_LED_CTRL RED_LED RED_LED IF_GREEN_LED_CTRL GREEN_LED GREEN_LED IF_SB1_CTRL AUDIO IF_SB2_CTRL IF_SB3_CTRL INT_MIC 4V_3.3V 4V_3.3V IF_EMER_CTRL EMER EMER IF_RTA0_CTRL EXT_MIC RTA0 RTA0 Vddd Vddd IF_RTA1_CTRL RTA1 RTA1 IF_RTA2_CTRL RTA2 RTA2 DEMOD DEMOD ASFIC EXT_SPKR_SEL IF_RTA3_CTRL RTA3 RTA3 IF_MECHSWB+_CTRL MECH_SWB+ MECH_SWB+ DACRX DACRX...

  • Page 53: Controller Asfic/On_Off Schematic Diagram

    4-31 4V_3.3V R405 R402 1MEG 1MEG SWB+ TP410 SEE TABLE SEE TABLE Q400 C405 BATT_CODE 800 MHz only TP406 Vddd UNSWB+ 100pF C401 Vddd C400 0.1uF R401 .01uF R406 R427 Vdda 2.7K U400 C402 LP2951ACMM-3.3 C403 CR412 OUTPUT 1 2.2uF 0.1uF INPUT C410...

  • Page 54: Controller Microprocessor Schematic Diagram

    4-32 Vddd F1200 R457 R409 SCI_TX SCI_RX TP402 TP401 R418 1MEG UNSWB+ Vddd Vddd Vddd R437 C431 C449 C453 C423 100pF 100pF 100pF 100pF L411 390nH U410 L410 ILC7062CM-33 390nH 3.3V C456 R411 VOUT 100pF C434 EE_CS 0.1uF C435 R460 R461 4.7K 0.1uF...

  • Page 55: Controller Interface And Memory Schematic Diagram

    4-33 Controller Interface and Memory Schematic Diagram...

  • Page 56: Controller Audio Power Amplifier Schematic Diagram

    4-34 UNSWB+ OPT_SEL2 SWB+ C475 OPT_SEL1 10uF VR448 VR449 VR446 VR445 VR447 10.0V 10.0V 10.0V R473 10.0V 10.0V R450 C471 C472 J403 100pF C442 C473 20 PIN CONN 100pF 0.1uF R423 100pF J403-1 C447 VCC2 R472 J403-2 INT_SPK+ .022uF 6.2K IN1POS OUT1POS AUDIO...

  • Page 57: Keypad Board Information

    Section 5 KEYPAD BOARD INFORMATION Theory of Operation Keypad The LED_EN setting is set by the codeplug. When the value is set to high, the LED will not light up during power up and vice versa. U602 is a comparator that will compare the voltage when any one of the keypad row or keypad column keys is being pressed.

  • Page 58: Troubleshooting Chart

    Troubleshooting Chart Troubleshooting Chart Disconnect and reconnect 18-pin Display flex IF STILL OFF Disconnect and reconnect 40-pin Keypad flex Figure 5-2: Keypad Board Troubleshooting Chart...

  • Page 59: Parts List (Keypad Basic)

    Parts List (Keypad Basic) Parts List (Keypad Basic) Motorola Circuit Ref Description Part No. Motorola Circuit Ref Description Q602 4880214G02 MMBT3904 tran- Part No. sistor (NPN) C610 2113743N50 100 pF Q603 4880214G02 MMBT3904 tran- C611 2113743N50 100 pF sistor (NPN)
  • Page 60 Parts List (Keypad Basic)

  • Page 61: Keypad Board And Schematic Diagram

    Keypad Board And Schematic Diagram Keypad Board And Schematic Diagram R620 R626 R606 Q603 C621 Q602 Q601 R632 R629 R622 R623 E637 R627 C619 C611 C617 J601 C618 C612 C613 ZMY0130489-O ZMY0130490-O Top View Bottom View Keypad Board Top and Bottom View (PCB No. 8480574Z05)

  • Page 62: Keypad Board Schematic Diagram

    Keypad Board And Schematic Diagram Vddd C618 C617 100pF E637 40 PIN CONNECTOR C622 100pF C610 EXT_MIC J601-1 EXT_MIC ROW3 ROW5 ROW4 M606 VS_CS J601-2 VS_CS M604 M605 100pF SWB+ SW_B+ R614 SWITCH SWITCH J601-3 SWITCH R632 C621 C620 C619 J601-4 Vddd R615...

  • Page 63: Section 6A

    GP328 403-470 MHz 4W AZH25RDH9AA6 GP338 403-470 MHz 4W Item Description PMUE1563_ GP328 Super Tanapa 403-470 MHz 4W 4CH PMUE1434_ GP328 Super Tanapa 403-470 MHz 4W PMUE1407_ GP338 Super Tanapa 403-470 MHz 4W PMUE1565_ GP328 Tanapa 403-470 MHz 4W 4CH...
  • Page 64 6A-2 Model Chart GP Series, UHF, 403-470 MHz Model Description AZH25RDC9AA3 with GP328 403-470 MHz 4W (w/o keypad, camouflage) option AZQ203AE AZH25RDC9AA3 with GP328 403-470 MHz 4W (w/o keypad, yellow) option AZH64AH AZH25RDH9AA6 with GP338 403-470 MHz 4W (keypad, camouflage)

  • Page 65: Specifications

    Transmitter General RF Output High NiMH @ 7.5V: Frequency: 403-470 MHz Frequency 403-470 MHz Channel Capacity: GP328 : 4/16 Channels Channel Spacing 12.5/20/25 kHz GP338 : 128 Channels 7.5 Volts ±20% Freq. Stability 0.00025% Power Supply: (-30°C to +60°C) Dimensions Spurs/Harmonics: -36 dBm <...

  • Page 66: Transmitter

    6A-4 Transmitter Transmitter P CI C Antenna Vcontrol Vcontrol Jack Antenna Switch/ From VCO PA-Final Harmonic Filter/ Driver Stage Matching Network Figure 6-1: Transmitter Block Diagram General (Refer to Figure 6-1) The UHF transmitter contains five basic circuits: 1. power amplifier 2.
  • Page 67 Transmitter 6A-5 3.1.2 Antenna Switch The antenna switch circuit consists of two PIN diodes (CR101 and CR102), a pi network (C107, L104 and C106), and two current limiting resistors (R101, R170). In the transmit mode, B+ at PCIC (U102) pin 23 will go low and turn on Q111 where a B+ bias is applied to the antenna switch circuit to bias the diodes "on".

  • Page 68: Receiver

    6A-6 Receiver Receiver Antenna Pin Diode Varactor Varactor Antenna Crystal RF Amp Mixer IF Amp Tuned Filter Tuned Filter Switch RF Jack Filter First LO from FGU Control Voltage from ASFIC Recovered Audio Demodulator Squelch U301 RSSI Synthesizer 16.8 MHz Reference Clock SPI Bus Second...

  • Page 69: Receiver Back-End

    Receiver 6A-7 The output of the post-RF amplifier filter which is connected to the passive double balanced mixer consists of T301, T302 and CR306. Matching of the filter to the mixer is provided by C381. After mixing with the first LO signal from the voltage controlled oscillator (VCO) using low side injection, the RF signal is down-converted to the 45.1 MHz IF signal.

  • Page 70: Automatic Gain Control Circuit

    6A-8 Receiver Automatic Gain Control Circuit (Refer to UHF Receiver Front End Schematic Diagram on page 6A-18) The front end automatic gain control circuit is to provide automatic gain reduction of the front end RF amplifier via feedback. This action is necessary to prevent overloading of backend circuits. This is achieved by drawing some of the output power from the RF amplifier’s output.

  • Page 71: Frequency Generation Circuitry

    Frequency Generation Circuitry 6A-9 Frequency Generation Circuitry Dual Tran- sistor Voltage Multiplier Rx Out Matching Pass Mixer Network Filter Aux3 VCOBIC Rx VCO Circuit Vmult1 U241 Aux4 Synthesizer Vmult2 U201 Loop Filter Tx Out Attenuator PA Driver 16.8 MHz Ref. Osc. MOD Out Tx VCO Circuit Modulating...

  • Page 72: Synthesizer

    6A-10 Frequency Generation Circuitry Synthesizer (Refer to UHF Synthesizer Schematic Diagram on page 6A-20) The Fractional-N Synthesizer uses a 16.8MHz crystal (FL201) to provide a reference for the system. The LVFractN IC (U201) further divides this to 2.1MHz, 2.225MHz, and 2.4MHz as reference frequencies.

  • Page 73: Vco - Voltage Controlled Oscillator

    Frequency Generation Circuitry 6A-11 VCO - Voltage Controlled Oscillator (Refer to UHF Voltage Controlled Oscillator Schematic Diagram on page 6A-21) AUX3 (U201 Pin2) Level Shifter AUX4 (U201 Pin3) Network U201 Pin 32 Prescaler Out TRB_IN Pin 20 Pin 19 Pin 12 Pin7 Rx-SW TX/RX/BS...
  • Page 74 6A-12 Frequency Generation Circuitry The VCOBIC(U241) is operated at 4.54 V (VSF) and Fractional-N synthesizer (U201) at 3.3V. This difference in operating voltage requires a level shifter consisting of Q260 and Q261 on the TRB line. The operation logic is shown in Table 6-1. Table 6-1: Level Shifter Logic Desired AUX 4...

  • Page 75: 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 multime- ter or equivalent. Transmitter measurements should be made with a 1.2 µH choke in series with the voltage probe to prevent circuit loading.
  • Page 76 6A-14 Notes For All Schematics and Circuit Boards...

  • Page 77: Circuit Board/Schematic Diagrams And Parts List

    Circuit Board/Schematic Diagrams and Parts List Circuit Board/Schematic Diagrams and Parts List SH400 R410 E407 E409 PB504 R437 PB503 PB502 PB501 VR440 C521 SH323 R300 R352 C397 FL201 RT301 R314 SH321 R321 CR310 FL301 VR501 C362 C328 R335 C363 C325 U405 L332 TP201...

  • Page 78: Uhf (403-470Mhz) Main Board Bottom Side Pcb No. 8480450Z03

    Circuit Board/Schematic Diagrams and Parts List C522 VR442 C523 SH402 E405 C437 L505 SH322 E404 L330 C359 E406 C338 S502 C358 C357 E402 C390 R350 C344 R344 C383 C360 C346 R311 R415 C361 R312 C433 C343 C431 C263 C208 SH202 L261 C204 C264...

  • Page 79: Uhf Controls And Switches Schematic Diagram

    Circuit Board/Schematic Diagrams and Parts List B501 L505 BATTERY_CONTACT 390nH RADIO_CODE 2 DATA UNSWB+ BATT_CODE 1 NEG BATT + F501 3 POS S502 CONN_J SWITCH BATT – MECH_SWB+ B503 LI_ION B504 C502 VR506 CR501 VR439 C503 0.47uF 6.8V 100pF Vdda R507 Vdda C505...

  • Page 80: Uhf Receiver Front End Schematic Diagram

    Circuit Board/Schematic Diagrams and Parts List DACRx C322 82pF R342 100K L310 150nH R308 C315 R305 C314 R310 0.1uF 100pF R304 R309 C380 .01uF L304 CR306 C321 180nH C306 100pF T301 XFMR C309 C308 100pF R306 R307 100pF 100K C312 100K C310 C316...

  • Page 81: Uhf Receiver Back End Schematic Diagram

    Circuit Board/Schematic Diagrams and Parts List L331 R343 2.2uH Vdd_FILTERED Vdda C382 (SOURCE) 10uF DEMOD R350 C348 C347 C344 C346 C345 100K 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF C390 C329 100pF 0.1uF C343 0.22uF R344 R355 SH323 SH321 SH322 SHIELD SHIELD SHIELD Q320 C383...

  • Page 82: Uhf Synthesizer Schematic Diagram

    Circuit Board/Schematic Diagrams and Parts List U210 U211 TC7SET04FU TC7SET04FU C265 C257 C296 100pF 0.1uF C258 .01uF U247 ADP3300 C259 SWB+ .01uF CR201 (SOURCE) C291 C294 C293 0.47uF L202 4V_3.3V 100pF 0.47uF U248 2.2uH LP2980 L203 C277 C278 2.2uH C230 C229 C228 100pF...

  • Page 83: Uhf Voltage Controlled Oscillator Schematic Diagram

    Circuit Board/Schematic Diagrams and Parts List C281 R245 100pF R242 L243 C250 RESONATOR 7.5pF C276 C285 C286 2.2uF 100pF 0.1uF C246 L281 L273 100pF R241 390nH 33nH C242 7.5pF C272 C273 0.1uF C243 L271 L242 R244 7.5pF 68nH 220nH C245 RX_INJ 2.4pF TX_INJ...

  • Page 84: Uhf Transmitter Schematic Diagram

    Circuit Board/Schematic Diagrams and Parts List R170 E101 BEAD R102 R101 UNSWB+ L107 C114 C123 33.47nH 100pF 10uF C172 C108 0.1uF UNSWB+ L105 100pF 390nH R106 C109 L106 100pF 7.66nH Microstrip Microstrip R172 L108 L109 C121 C160 L112 11.03nH 100pF 100pF 390nH 4.22nH...

  • Page 85: Uhf Radio Parts List

    100pF C342 2180478Z20 B503 3980502Z01 Backup Contact, B+ (not used C174 2113743N50 100pF C278 2311049A57 10uF C343 2113743A23 0.22uF in GP328) C201 2113743N50 100pF C279 2104993J02 2.2uF C344 2113743M24 100000pF B504 3980501Z01 Backup Contact, B- (not used C202 2113743L17 1000pF...
  • Page 86 Tactile switch C433 2113743L41 10000pF CR101 4880973Z02 Pin diode L108 2479990A01 4.22nH Q110 4802245J55 RF Power amplifier C434 2113928N01 0.1uF (not used in GP328) CR102 4802245J41 Pin diode L109 2479990B01 11.03nH Q111 4802245J50 Dual NPN/PNP Transistor C435 2113743M24 100000pF CR105 5185963A15...
  • Page 87 SH301 2680554Z01 Receiver front end shield 8480450Z03 UHF Band 1 main PC Board R304 0662057N01 R419 0662057M67 0 (not used in GP328) SH302 2680555Z01 Receiver front end bottom * Motorola Depot Servicing only R305 0662057M67 R420 0662057B46 10M (not used in GP328)

  • Page 88: Circuit Board/Schematic Diagrams And Parts List

    Circuit Board/Schematic Diagrams and Parts List Circuit Board/Schematic Diagrams and Parts List R410 E407 PB504 E409 PB501 PB503 PB502 R437 C505 VR440 C521 SH323 R300 R352 C502 VR444 C397 FL201 B503 B504 R351 R334 RT301 R316 R507 R314 R321 FL301 VR501 C362 C328...

  • Page 89: Uhf (403-470Mhz) Main Board Bottom Side Pcb No. 8480450Z13

    Circuit Board/Schematic Diagrams and Parts List M301 M101 M400 C522 VR442 C523 C436 VR506 E405 C437 R426 R420 L505 C345 C334 E404 R343 VR441 L330 C359 E406 S502 C382 C338 C330 E403 R414 C358 L331 C357 E401 E402 C326 R313 R350 C344 C278...

  • Page 90: Uhf Controls And Switches Schematic Diagram

    Circuit Board/Schematic Diagrams and Parts List RADIO_CODE BATTERY_CONTACT L505 B501 UNSWB+ 390nH BATT_CODE DATA 1 NEG BATT+ S502 3 POS F501 SWITCH BATT- CONN_J MECH_SWB+ LI_ION B503 TAB2 CR501 B504 VR506 VR439 C502 C503 6.8V TAB1 100pF 0.47uF R507 6.8V C505 VR501 100pF...

  • Page 91: Uhf Receiver Front End Schematic Diagram

    Circuit Board/Schematic Diagrams and Parts List DACRx C322 82pF R342 100K L310 150nH R308 C315 R310 C314 R305 100pF 0.1uF R304 C380 R309 .01uF CR306 L304 C321 T301 C306 180nH 100pF XFMR C309 R306 C308 100pF R307 100K 100pF C312 C318 C310 100K...

  • Page 92: Uhf Receiver Back End Schematic Diagram

    Circuit Board/Schematic Diagrams and Parts List R343 L331 2.20uH Vdd_FILTERED Vdda C382 10uF (SOURCE) DEMOD C348 C344 C347 C346 R350 C345 0.1uF 100K 0.1uF 0.1uF 0.1uF 0.1uF C390 C329 100pF 0.1uF C343 0.22uF R344 R345 R355 C383 C357 Q320 100pF C342 C384 0.22uF...

  • Page 93: Uhf Synthesizer Schematic Diagram

    Circuit Board/Schematic Diagrams and Parts List U210 U211 TC7ST04FU C296 C257 TC7ST04FU C265 0.1uF 100pF 3 GND C258 .01uF U247 ADP3300 C259 SWB+ .01uF (SOURCE) CR201 C291 10uF C294 C293 3 K3 U248 4V_3.3V L202 100pF 0.47uF 2 K2 A2 5 LP2980 2.2uH L203...

  • Page 94: Uhf Voltage Controlled Oscillator Schematic Diagram

    Circuit Board/Schematic Diagrams and Parts List C281 R245 100pF R242 L243 C250 C276 C286 C285 RESONATOR 7.5pF 0.1uF 2.2uF 100pF C246 L281 R241 L273 100pF 390nH 33nH C242 C272 7.5pF C273 0.1uF C243 L242 L271 R244 7.5pF 220nH 68nH RX_INJ C245 2.4pF TX_INJ...

  • Page 95: Uhf Harmonic Filter Schematic Diagram

    Circuit Board/Schematic Diagrams and Parts List ANT_BIAS SH100 C108 100pF SHIELD L105 390nH TX_OUT HF SHIELD CR101 L102 L101 L104 19.61nH 19.61nH 19.61nH RX_IN CR102 C106 C101 C102 C103 C104 C107 100pF 6.2pF 10pF 6.2pF 4.7pF 3.3pF R170 C175 20pF RF_JACK R101 ZMY0130486-A...

  • Page 96: Uhf Transmitter Schematic Diagram

    Circuit Board/Schematic Diagrams and Parts List E101 R102 BEAD 0.075 UNSWB+ L107 C114 C123 33.47nH 100pF 10uF C172 0.1uF C109 L106 UNSWB+ 100pF 7.66nH Microstrip Microstrip X_OUT R106 R172 Q110 C121 C160 L109 L112 R175 L108 100pF 100pF 22nH Microstrip 4.22nH C111 C112...

  • Page 97: Uhf Radio Parts List

    2113743N26 10pF B503 3980502Z01 Backup battery B+ (not placed C171 2113743N50 100pF C264 2113743N50 100pF C331 2113743N50 100pF in GP328) C172 2113740F51 100pF C265 NOT PLACED C333 NOT PLACED B504 3980501Z01 Backup battery B- (not placed C173 2113743M08 22000pF C271...
  • Page 98 L400 2462587Q42 390nH C433 2113743L41 10000pF C523 2113743L41 10000pF J102 0280519Z02 Antenna nut L401 2462587Q42 390nH C434 2113928N01 0.1uF (not placed in GP328) C524 2113743N50 100pF J400 0905505Y04 40-pin connector L410 2462587Q42 390nH C435 2113743M24 100000pF C525 2113743N50 100pF J403...
  • Page 99 Part No. Part No. Part No. Part No. Q315 4880214G02 R253 0662057M95 7500 R348 0662057M87 3600 R462 0662057M98 10k (not placed in GP328) Q316 NOT PLACED R254 0662057M95 7500 R349 0662057C01 R463 0662057M61 Q320 4805218N63 RF NPN transistor R255 0662057M89...
  • Page 100 ZENER DIODE-10V VR448 4802245J74 ZENER DIODE-10V VR449 4802245J74 ZENER DIODE-10V VR450 4802245J75 ZENER DIODE-12V VR460 4802245J73 ZENER DIODE-6.8V VR501 4813830A18 6.8V Zener VR506 4802245J73 ZENER DIODE-6.8V 1485777Z01 INSULATOR (KAPTON) 8480450Z13 UHF B1 main PC board * Motorola Depot Servicing only...

  • Page 101: Troubleshooting Charts

    Troubleshooting charts 6A-39 Troubleshooting charts MCU Check Press PTT. Red LED does not Before replacing light up Power Up Not able to pro- MCU, check SPI Alert Tone gram RF Board AUDIO Audio at clock, SPI data, J403 Audio AudioPA and RF IC select at Pin 2 &...

  • Page 102: Troubleshooting Flow Chart For Receiver (Sheet 1

    6A-40 Troubleshooting charts START Bad SINAD Bad 20dB Quieting No Recovered Audio Audio at pin Check Controller 27 of U301? Spray of inject 1st IF into XTAL Filter IF Freq: 45.1MHz Check Q320 bias circuitry for faults. Audio heard? Rotate Freq. Knob Check 2nd LO Control Voltage at C363 Activity on...

  • Page 103: Troubleshooting Flow Chart For Receiver (Sheet 2

    Troubleshooting charts 6A-41 Inject RF into J101 Trace IF signal Q302 collec- from L311 to IF Signal at tor OK? Q302. Check for L311? IF signal bad XTAL filter. present? Before replacing U301, check U301 voltages; 1st LO O/P trace IF signal RF Signal at Check FGU path.

  • Page 104: Troubleshooting Flow Chart For Transmitter

    6A-42 Troubleshooting charts START No Power Is There B+ Check Q111 Bias for Ant switch Is Control Volt- Check PCIC Is Current age High or Low High Check Drive to Module 1. Check Pin Diodes 2. Check Harmonic Filter Is Drive Troubleshoot Inspect/Repair Tx.

  • Page 105: Troubleshooting Flow Chart For Synthesizer

    Troubleshooting charts 6A-43 Check U248, 3.3V at U201 Start L201 & L202 pins 5, 20, 34 & Visual Check CR201, U210, Correct check of the U211, C258, C259 & Problem Board OK? C228 Is U201 Pin 47 Is 16.8MHz 16.8MHz at pin 6 of Replace AT = 13 VDC...

  • Page 106: Troubleshooting Flow Chart For Vco

    6A-44 Troubleshooting charts START Change U241 No LO? Change L253 O/C? L253 Pin 10 TRB = 5V? Tx Carrier? >1V? VCO OK Check R245 for dry joint or faulty AUX 3 Check High? R260 Check U201 Pin 2 for 3.2V Change L243 V ctrl 0V...

  • Page 107: Section 6B

    GP328 136-174 MHz 5W AZH25KDH9AA6 GP338 136-174 MHz 5W Item Description PMUD1573_ GP328 Super Tanapa 136-174 MHz 5W 4CH PMUD1480_ GP328 Super Tanapa 136-174 MHz 5W PMUD1481_ GP338 Super Tanapa 136-174 MHz 5W PMUD1574_ GP328 Tanapa 136-174 MHz 5W 4CH...
  • Page 108 6B-2 Model Chart GP Series, VHF, 136-174 MHz Model Description AZH25KDC9AA3 with GP328 136-174 MHz 5W (w/o keypad, camouflage) option AZQ203AD AZH25KDC9AA3 with GP328 136-174 MHz 5W (w/o keypad, yellow) option AZH64AG AZH25KDH9AA6 with GP338 136-174 MHz 5W (keypad, camouflage)

  • Page 109: Specifications

    Transmitter General RF Output High NiMH @ 7.5V: Frequency: 136-174 MHz Frequency 136-174 MHz Channel Capacity: GP328 : 4/16 Channels Channel Spacing 12.5/20/25 kHz GP338 : 128 Channels 7.5 Volts ±20% Freq. Stability 0.00025% Power Supply: (-30°C to +60°C) Dimensions Spurs/Harmonics: -36 dBm <...

  • Page 110: Transmitter

    6B-4 Transmitter Transmitter P CI C Antenna Vcontrol Vcontrol Jack Antenna Switch/ From VCO PA-Final Harmonic Filter/ Driver Stage Matching Network Figure 6-1: Transmitter Block Diagram General (Refer to Figure 6-1) The VHF transmitter contains five basic circuits: 1. power amplifier 2.
  • Page 111 Transmitter 6B-5 3.1.2 Antenna Switch The antenna switch circuit consists of two PIN diodes (D3521 and D3551), a pi network (C3531, L3551 and C3550), and three current limiting resistors (R3571, R3572, R3573 ). In the transmit mode, B+ at PCIC (U3502) pin 23 will go low and turn on Q3561 where a B+ bias is applied to the antenna switch circuit to bias the diodes "on".

  • Page 112: Receiver

    6B-6 Receiver Receiver Antenna Pin Diode Varactor Varactor Antenna Crystal RF Amp Mixer IF Amp Tuned Filter Tuned Filter Switch RF Jack Filter First LO from FGU Control Voltage from ASFIC Recovered Audio Demodulator Squelch U3220 RSSI Synthesizer 16.8 MHz Reference Clock SPI Bus Second...

  • Page 113: Receiver Back-End

    Receiver 6B-7 The output of the post-RF amplifier filter is connected to the passive double balanced mixer which consists of T3301, T3302 and CR3301. Matching of the filter to the mixer is provided by C3317, C3318 and L3308. After mixing with the first LO signal from the voltage controlled oscillator (VCO) using high side injection, the RF signal is down-converted to the 45.1 MHz IF signal.

  • Page 114: Automatic Gain Control Circuit

    6B-8 Receiver Automatic Gain Control Circuit (Refer to VHF Receiver Front End Schematic Diagram on page 6B-20 and VHF Receiver Back End Schematic Diagram on page 6B-21) The front end automatic gain control circuit provides automatic reduction of gain, of the front end RF amplifier via feedback.

  • Page 115: Frequency Generation Circuitry

    Frequency Generation Circuitry 6B-9 Frequency Generation Circuitry Voltage Multiplier Rx Out Mixer VCOBIC Aux3 Rx VCO Circuit Vmult1 U3801 Synthesizer Vmult2 U3701 Loop Filter Tx Out PA Driver 16.8 MHz Ref. Osc. Tx VCO Circuit MOD Out Modulating Signal Figure 6-3: Frequency Generation Unit Block Diagram The Frequency Generation Circuitry is composed of two main ICs, the Fractional-N synthesizer (U3701), and the VCO/Buffer IC (U3801).

  • Page 116: Synthesizer

    6B-10 Frequency Generation Circuitry Synthesizer (Refer to VHF Synthesizer Schematic Diagram on page 6B-22) The Fractional-N Synthesizer uses a 16.8MHz crystal (Y3761) to provide a reference for the system. The LVFractN IC (U3701) further divides this to 2.1MHz, 2.225MHz, and 2.4MHz as reference frequencies.

  • Page 117: Vco - Voltage Controlled Oscillator

    Frequency Generation Circuitry 6B-11 VCO - Voltage Controlled Oscillator (Refer to VHF Voltage Controlled Oscillator Schematic Diagram on page 6B-23) AUX3 (U3701 Pin2) U3701 Pin 32 Prescaler Out TRB_IN Pin 20 Pin 19 Pin 12 Pin7 Rx-SW TX/RX/BS Pin13 Tx-SW Switching Network LO RF INJECTION Presc...
  • Page 118 6B-12 Frequency Generation Circuitry The RF section of the VCOBIC(U3801) is operated at 4.54 V (VSF), while the control section of the VCOBIC and Fractional-N synthesizer (U3701) is operated at 3.3V. The operation logic is shown in Table 6-1. Table 6-1: VCO Control Logic Desired AUX 4 AUX 3...

  • Page 119: 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 multime- ter or equivalent. Transmitter measurements should be made with a 1.2 µH choke in series with the voltage probe to prevent circuit loading.
  • Page 120 6B-14 Notes For All Schematics and Circuit Boards...

  • Page 121: Circuit Board/Schematic Diagrams And Parts List

    Circuit Board/Schematic Diagrams and Parts List Circuit Board/Schematic Diagrams and Parts List VR444 VR440 C523 R410 SH400 E408 E407 PB503 PB502 PB504 PB501 C521 C3205 C522 R3200 C505 E409 C423 R437 R3217 C3212 C3213 C3208 SH3203 R3206 R3207 SH3201 R3209 C3280 Y3761 C3271...

  • Page 122: Vhf (136-174Mhz) Main Board Bottom Side Pcb No. 8486062B09

    Circuit Board/Schematic Diagrams and Parts List VR441 VR442 C436 C437 R426 E405 R420 C3241 C3223 C3219 E404 R3219 C3227 D3761 C3240 E406 C3763 S502 C3236 R3224 R3222 R414 E403 Y3762 R3222 C3237 R3223 C3243 C3224 E402 R3760 R463 R3761 U3220 C3244 B501 CR501...

  • Page 123: Vhf (136-174Mhz) Main Board Top Side Pcb No. 8486062B12

    Circuit Board/Schematic Diagrams and Parts List VR444 VR440 C523 SH400 R410 E408 E407 PB503 PB502 PB504 PB501 C521 C3205 R3200 C505 C522 E409 C423 R437 R3217 C3212 C3213 C3208 SH3203 R3206 R3207 SH3201 R3209 C3280 Y3761 C3271 C3270 R3276 R3202 B503 R3208 B504...

  • Page 124: Vhf (136-174Mhz) Main Board Bottom Side Pcb No. 8486062B12

    Circuit Board/Schematic Diagrams and Parts List VR441 VR442 C436 C437 R426 E405 R420 C3219 C3241 C3223 E404 D3761 R3219 C3227 C3240 E406 C3763 S502 C3236 R3224 R3222 R414 E403 Y3762 R3223 C3224 R3222 C3237 C3243 E402 R3760 U3220 C3244 R3761 B501 CR501 R463...

  • Page 125: Vhf Controls And Switches Schematic Diagram

    Circuit Board/Schematic Diagrams and Parts List 16_8MHz_1_SW 16_8MHz_2_SW 16.8MHz 5V_4_SW 5V_1_SW 5V_2_SW 5V_3_SW 5V_5_SW CLK_1_SW CLK_2_SW CLK_3_SW CLK_4_SW CLK_5_SW CSX_1_SW CSX_2_SW DACRX_2_SW DACRx_1_SW DACRx SB3_1_SW DATA_4_SW DATA_1_SW DATA_2_SW DATA_3_SW DATA_5_SW RTA1_1_SW DATA RTA1 RTA1 RTA0_1_SW SQ_OUT_1_SW SQ_OUT_2_SW RTA0 RTA0 SQ_OUT EMER_1_SW EMER EMER...

  • Page 126: Vhf Receiver Front End Schematic Diagram

    Circuit Board/Schematic Diagrams and Parts List R5_2_FE R5_3_FE C3320 C3337 C3309 R3316 82pF .022uF 0.1uF L3309 150nH R3322 UNSWB_PLUS_1_RX UNSWB_PLUS_2_RX R3321 R3323 UNSWB+ C3308 IF_1_FE L3304 330pF 470nH C3336 10uF C3307 C3315 R3315 100pF .022uF mgc_comps T3301 R3310 C3313 C3317 39pF C3316 150pF...

  • Page 127: Vhf Receiver Back End Schematic Diagram

    Circuit Board/Schematic Diagrams and Parts List Vdd_FILTERED Vdd_FILTERED C3208 R5_3_ZIF R3209 0.1uF R3220 R3200 4.7K R3206 Q3201 RSSI C3220 100K C3204 R3201 C3205 10pF .01uF 2.2K 0.1uF L3221 R3207 R3208 R3212 4.7K 2.9V C3228 R3221 Y3200 .01uF C3229 C3225 XTAL R3202 100pF C3210...

  • Page 128: Vhf Synthesizer Schematic Diagram

    Circuit Board/Schematic Diagrams and Parts List U3711 ADP3300 ADP3300 7.5V 5V_1_FN SWB_PLUS_1_FN (SOURCE) SWB+ C3711 2.2uF L3701 C3712 C3713 C3701 390nH 2.2uF .01uF 0.1uF A2 5 R3701 C3702 A1 6 .01uF D3701 C3710 C3703 2.2uF .01uF C3704 .01uF 2 K3 1 K2 13.2V R3705...

  • Page 129: Vhf Voltage Controlled Oscillator Schematic Diagram

    Circuit Board/Schematic Diagrams and Parts List Vdda Vdda_3_VCO VSF_1_VCO 3.3V 4.55V R5_1_VCO L3813 R:4V R3817 T: 2.8V R3802 R3811 R:4.6V R, T: 3.5V-9.5V T: 0V C3822 @ 135MHz-174MHz C3813 R: 1V RMS 1000pF R: 250mV RMS R3818 D3821 C3810 L3811 L3812 C3811 C3812...

  • Page 130: Vhf Transmitter Schematic Diagram

    Circuit Board/Schematic Diagrams and Parts List RESET UNSWB+ UNSWB+ UNSWB+ RESET_1_PA 5V_2_PA DATA UNSWB+ CLK_2_PA R3570 DATA_2_PA R3569 CSX_2_PA Q3561 UNSW_LPLUS_3_PA 7.5K C3560 UNSWB_LPLUS_2_PA GND2 BPOS R3561 DATA U3502 TEMP 09Z46 LM50C C3566 F168 100pF 5185963A15 VOUT R3571 U3503 C3561 R3562 R3563 .022uF...

  • Page 131: Vhf Radio Parts List

    C3726 2113743N24 8.2pF B503 3980502Z01 Backup Contact, B+ (not used C3280 2113743L41 10000pF C3525 2113740F27 10pF C3727 2113743N50 100pF in GP328) C3301 2113743N20 5.6pF C3526 2113743M08 22000pF C3731 2113743L41 10000pF B504 3980501Z01 Backup Contact, B- (not used C3302 2113743N54 150pF...
  • Page 132 4080523Z01 Tactile, Pushbutton C433 2113743L41 10000pF C513 2113743N50 100pF L3271 2462587Q20 2200nH PB503 4080523Z01 Tactile, Pushbutton C434 2113928N01 0.1uF (not used in GP328) C514 2113743N50 100pF L3301 2462587T35 12nH PB504 4080523Z01 Tactile, Pushbutton C435 2113743M24 100000pF C520 2113743L41 10000pF L3303...
  • Page 133 R3570 0662057M98 R418 0662057M01 SH3701 2680511Z01 Synthesizer top shield R3224 0662057M26 R3571 0662057A27 R419 0662057M67 0 (not used in GP328) SH3702 2680511Z01 Synthesizer bottom shield R3225 0662057M74 1000 R3572 0662057A27 R420 0662057B46 10M (not used in GP328) SH3801 2680513Z01 VCO Top Shield...
  • Page 134 Circuit Board/Schematic Diagrams and Parts List Circuit Motorola Description Part No. Y3761 4802245J49 16.8MHz Xtal Oscillator 5480678Z01 PCB Barcode label 8486062B12 VHF Main PC Board * Motorola Depot Servicing only...

  • Page 135: Circuit Board/Schematic Diagrams And Parts List

    Circuit Board/Schematic Diagrams and Parts List Circuit Board/Schematic Diagrams and Parts List VR444 VR440 C523 R410 C423 E407 PB504 PB503 PB501 E409 PB502 C521 R437 C3205 R3200 C505 E408 C522 R3215 R3214 R418 C3213 C3212 R3206 C502 U3201 R3207 C3208 R3209 L3271 C3271...

  • Page 136: Vhf (136-174Mhz) Main Board Bottom Side Pcb No. 8486062B16

    Circuit Board/Schematic Diagrams and Parts List M301 M101 M400 VR441 C436 VR442 E405 C437 R426 L505 C3241 C3223 C3219 E404 R420 C3240 R3219 C3227 VR439 E406 R3224 C3763 R3222 D3761 C3236 C3242 E403 S502 R414 C3243 B501 C3237 R3223 C3222 VR506 Y3762 E402...

  • Page 137: Vhf Controls And Switches Schematic Diagram

    Circuit Board/Schematic Diagrams and Parts List UNSWB+ F501 mgc_comps S502 PB505 MECH_SWB+ SWITCH B501 TAB2 BATT_CODE DATA EMER L505 C503 C535 C502 390nH 1000pF 1000pF 0.47uF 100pF VR506 VR439 TAB1 6.8V CR501 C520 .01uF PB501 SWITCH Vdda LI_ION B503 VR440 C521 6.8V .01uF...

  • Page 138: Vhf Receiver Front End Schematic Diagram

    Circuit Board/Schematic Diagrams and Parts List R5_2_FE R5_3_FE C3320 82pF C3337 C3309 R3316 .022uF 0.1uF L3309 150nH R3321 R3322 UNSWB_PLUS_1_RX UNSWB_PLUS_2_RX R3323 UNSWB+ IF_1_FE L3304 C3308 470nH 330pF C3336 10uF C3307 R3315 100pF C3315 T3301 10pF R3310 C3317 39pF C3312 C3313 C3318 C3311...

  • Page 139: Vhf Receiver Back End Schematic Diagram

    Circuit Board/Schematic Diagrams and Parts List Vdd_FILTERED Vdd_FILTERED C3208 R3209 0.1uF R3200 R3220 4.7K RSSI Q3201 C3205 C3204 R3201 R3206 .01uF 0.1uF 2.2K 100K C3220 10pF R3207 R3208 L3221 R3212 C3228 R3221 C3239 4.7K .01uF C3229 .022uF C3225 100pF Y3200 0.1uF R3202 XTAL...

  • Page 140: Vhf Synthesizer Schematic Diagram

    Circuit Board/Schematic Diagrams and Parts List U3711 mgc_comps 5V_1_FN 5V_2_FN SWB_PLUS_1_FN (SOURCE) SWB+ C3711 C3715 10uF 470pF L3701 C3712 C3713 390nH 2.2uF 0.1uF 2 K2 C3701 A2 5 .01uF A1 6 R3701 D3701 C3702 .01uF C3710 2.2uF C3703 .01uF BIAS_ADJ C3704 .01uF BIAS_ADJ_1_FN...

  • Page 141: Vhf Voltage Controlled Oscillator Schematic Diagram

    Circuit Board/Schematic Diagrams and Parts List Vdda Vdda_3_VCO VSF_1_VCO R5_1_VCO L3813 R3817 R3811 R3802 C3822 C3813 D3821 1000pF C3810 L3811 C3812 R3818 .01uF L3812 C3811 C3830 VCTRL_1_VCO C3825 10pF 100nH 0.1uF C3804 100nH 0.1uF 68pF 15pF VCTRL 0.1uF L3824 C3818 R3828 .022uF R3821...

  • Page 142: Vhf Transmitter Schematic Diagram

    Circuit Board/Schematic Diagrams and Parts List RESET UNSWB+ UNSWB+ UNSWB+ DATA CLK UNSWB+ 5V_2_PA RESET_1_PA C3571 470pF BIAS_TUNING C3570 330pF CLK_2_PA R3570 DATA_2_PA Q3561 CSX_2_PA UNSW_LPLUS_3_PA R3569 C3560 5.6K UNSWB_LPLUS_2_PA GND2 BPOS DATA R3561 U3502 H99S-4 TEMP RSET LM50C C3566 F168 5185963A15 100pF...

  • Page 143: Vhf Radio Parts List

    2113743L41 10000pF, 10% B503 3980502Z01 Backup battery B+ (not placed C3280 2113743L41 10000pF, 10% C3528 2113740F27 10pF C3732 2113743L41 10000pF, 10% in GP328) C3301 2113743N20 5.6pF C3531 2113740F34 20pF C3733 2104993J02 2.2uF B504 3980501Z01 Backup battery B- (not placed C3302...
  • Page 144 2113743L09 470pF, 10% FL401 4870368G02 Real Time Clock Oscialltor L3832 2462587N51 68nH C423 2113743N50 100pF C493 2113743N50 100pF XTAL (not placed in GP328) L3833 2462587N50 56nH C424 2311049A59 10uF, 10%, 6V C494 2113743N50 100pF H3501 2680499Z01 Heat spreader L3834 2462587N68...
  • Page 145 R418 0662057M01 SH3302 2686081B05 Mixer Shield R3225 0662057M74 1000 R3571 0662057A27 R419 0662057M67 510 (not placed in GP328) SH3303 2686081B06 Rx Frontend Top Shield R3226 0662057M26 R3572 0662057A27 R420 0662057B46 10M (not placed in GP328) SH3501 2686081B03 Harmonic Filter Shield...
  • Page 146 4802245J74 ZENER DIODE-10V VR460 4802245J73 ZENER DIODE-6.8V VR501 4802245J73 ZENER DIODE-6.8V VR506 4802245J73 ZENER DIODE-6.8V Y3200 9186153B01 Crystal Filter Y3761 4805875Z04 16.8MHz Xtal oscillator (SMD) 5480678Z01 PCB Bar Code Label 8486062B16 VHF main PC Board * Motorola Depot Servicing only...

  • Page 147: Troubleshooting Charts

    Troubleshooting charts 6B-41 Troubleshooting charts MCU Check Press PTT. Red LED does not Before replacing light up Power Up Not able to pro- MCU, check SPI Alert Tone gram RF Board AUDIO Audio at clock, SPI data, J403 Audio AudioPA and RF IC select at Pin 2 &...

  • Page 148: Troubleshooting Flow Chart For Receiver (Sheet 1

    6B-42 Troubleshooting charts START Bad SINAD Bad 20dB Quieting No Recovered Audio Audio at pin Check Controller 27 of U3220? Spray of inject 1st IF into XTAL Filter IF Freq: 45.1MHz Check Q3270 bias circuitry for faults. Audio heard? Rotate Freq. Knob Check 2nd LO Control Voltage at C3279 Activity on...

  • Page 149: Troubleshooting Flow Chart For Receiver (Sheet 2

    Troubleshooting charts 6B-43 Inject RF into J3501 Trace IF signal Q3200 collec- from C3200 to IF Signal at tor OK? Q3200. Check for C3200? IF signal bad XTAL filter. present? Before replacing U3220, check U3220 volt- 1st LO O/P ages; trace IF RF Signal at Check FGU signal path.

  • Page 150: Troubleshooting Flow Chart For Transmitter

    6B-44 Troubleshooting charts START No Power Is There B+ Check Bias for Ant Q3561 switch Is Control Volt- Is Current Check PCIC age High or Low High Check Drive to Module 1. Check Pin Diodes 2. Check Harmonic Filter Is Drive Troubleshoot Inspect/Repair Tx.

  • Page 151: Troubleshooting Flow Chart For Synthesizer

    Troubleshooting charts 6B-45 Check U3201, 3.3V at U3701 Start L3731 pins 5, 20, 34 & Visual Check D3701, D3702, Correct check of the U3701, C3701 - Problem Board OK? C3707 Is 16.8MHz 16.8MHz Is U3701 Pin 47 Replace at pin 6 of Signal at signal at AT = 13 VDC...

  • Page 152: Troubleshooting Flow Chart For Vco

    6B-46 Troubleshooting charts START Change U3801 L3831, Change L3832, No LO? L3831, L3832 L3833 O/ Pin 10 TRB = 3.2V? Tx Carrier? >1V? VCO OK Check R3811, L3811 for dry joint or faulty AUX 3 Check High? R3829 Change Check U3701 L3821, Pin 2 for 3.2V L3822,...

  • Page 153: Section 6C

    GP328 450-527 MHz 4W AZH25SDH9AA6 GP338 450-527 MHz 4W Item Description PMUE1564_ GP328 Super Tanapa 450-527 MHz 4W 4CH PMUE1477_ GP328 Super Tanapa 450-527 MHz 4W PMUE1478_ GP338 Super Tanapa 450-527 MHz 4W PMUE1566_ GP328 Tanapa 450-527 MHz 4W 4CH...

  • Page 154: Specifications

    Transmitter General RF Output High NiMH @ 7.5V: Frequency: 450-527 MHz Frequency 450-527 MHz Channel Capacity: GP328 : 4/16 Channels Channel Spacing 12.5/20/25 kHz GP338 : 128 Channels 7.5 Volts ±20% Freq. Stability 0.00025% Power Supply: (-30°C to +60°C) Dimensions Spurs/Harmonics: -36 dBm <...

  • Page 155: Transmitter

    Transmitter 6C-3 Transmitter P CI C Antenna Vcontrol Vcontrol Jack Antenna Switch/ From VCO PA-Final Harmonic Filter/ Driver Stage Matching Network Figure 6-1: Transmitter Block Diagram General (Refer to Figure 6-1) The UHF transmitter contains five basic circuits: 1. power amplifier 2.
  • Page 156 6C-4 Transmitter 3.1.2 Antenna Switch The antenna switch circuit consists of two PIN diodes (CR101 and CR102), a pi network (C107, L104 and C106), and two current limiting resistors (R101, R170). In the transmit mode, B+ at PCIC (U102) pin 23 will go low and turn on Q111 where a B+ bias is applied to the antenna switch circuit to bias the diodes "on".

  • Page 157: Receiver

    Receiver 6C-5 Receiver Antenna Pin Diode Varactor Varactor Antenna Crystal RF Amp Mixer IF Amp Tuned Filter Tuned Filter Switch RF Jack Filter First LO from FGU Control Voltage from ASFIC Recovered Audio Demodulator Squelch U301 RSSI Synthesizer 16.8 MHz Reference Clock SPI Bus Second...

  • Page 158: Receiver Back-End

    6C-6 Receiver The output of the post-RF amplifier filter which is connected to the passive double balanced mixer consists of T301, T302 and CR306. Matching of the filter to the mixer is provided by C381. After mixing with the first LO signal from the voltage controlled oscillator (VCO) using low side injection, the RF signal is down-converted to the 45.1 MHz IF signal.

  • Page 159: Automatic Gain Control Circuit

    Receiver 6C-7 Automatic Gain Control Circuit (Refer to UHF Band 2 Receiver Front End Schematic Diagram on page 6C-16) The front end automatic gain control circuit is to provide automatic gain reduction of the front end RF amplifier via feedback. This action is necessary to prevent overloading of backend circuits. This is achieved by drawing some of the output power from the RF amplifier’s output.

  • Page 160: Frequency Generation Circuitry

    6C-8 Frequency Generation Circuitry Frequency Generation Circuitry Dual Tran- sistor Voltage Multiplier Rx Out Matching Pass Mixer Network Filter Aux3 VCOBIC Rx VCO Circuit Vmult1 U241 Aux4 Synthesizer Vmult2 U201 Loop Filter Tx Out Attenuator PA Driver 16.8 MHz Ref. Osc. MOD Out Tx VCO Circuit Modulating...

  • Page 161: Synthesizer

    Frequency Generation Circuitry 6C-9 Synthesizer (Refer to UHF Band 2 Synthesizer Schematic Diagram on page 6C-18) The Fractional-N Synthesizer uses a 16.8MHz crystal (FL201) to provide a reference for the system. The LVFractN IC (U201) further divides this to 2.1MHz, 2.225MHz, and 2.4MHz as reference frequencies.

  • Page 162: Vco - Voltage Controlled Oscillator

    6C-10 Frequency Generation Circuitry VCO - Voltage Controlled Oscillator (Refer to UHF Band 2 Voltage Controlled Oscillator Schematic Diagram on page 6C-19) AUX3 (U201 Pin2) Level Shifter AUX4 (U201 Pin3) Network U201 Pin 32 Prescaler Out TRB_IN Pin 20 Pin 19 Pin 12 Pin7 Rx-SW...
  • Page 163 Frequency Generation Circuitry 6C-11 The VCOBIC(U241) is operated at 4.54 V (VSF) and Fractional-N synthesizer (U201) at 3.3V. This difference in operating voltage requires a level shifter consisting of Q260 and Q261 on the TRB line. The operation logic is shown in Table 6-1. Table 6-1: Level Shifter Logic Desired AUX 4...

  • Page 164: 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 multime- ter or equivalent. Transmitter measurements should be made with a 1.2 µH choke in series with the voltage probe to prevent circuit loading.

  • Page 165: Circuit Board/Schematic Diagrams And Parts List

    Circuit Board/Schematic Diagrams and Parts List 6C-13 Circuit Board/Schematic Diagrams and Parts List R410 E407 E409 PB503 PB502 PB504 PB501 R437 VR440 SH323 C521 R300 R352 C397 RT301 R314 R321 VR501 C328 C363 C325 R335 C362 U405 U406 R338 L325 TP201 J400 R506...

  • Page 166: Uhf Band 2 (450-527Mhz) Main Board Bottom Side Pcb No. 8485641Z02

    6C-14 Circuit Board/Schematic Diagrams and Parts List C523 C522 SH402 VR442 C437 L505 E405 C345 R343 VR441 E404 VR506 L330 C359 E406 C277 S502 C338 R414 C358 B501 Y201 C357 C326 R350 C344 E402 C390 R344 C330 C278 U248 R205 C383 C360 R415...

  • Page 167: Uhf Band 2 Controls And Switches Schematic Diagram

    Circuit Board/Schematic Diagrams and Parts List 6C-15 B501 L505 BATTERY_CONTACT 390nH RADIO_CODE 2 DATA UNSWB+ BATT_CODE 1 NEG BATT + F501 3 POS S502 CONN_J SWITCH BATT – MECH_SWB+ B503 LI_ION B504 C502 VR506 CR501 VR439 C503 0.47uF 6.8V 100pF Vdda R507 Vdda...

  • Page 168: Uhf Band 2 Receiver Front End Schematic Diagram

    6C-16 Circuit Board/Schematic Diagrams and Parts List DACRx C322 82pF R342 -63.8dBm@45.1MHz 100K L310 150nH R310 C315 R308 R305 C314 100pF 0.1uF R304 C380 R309 .01uF -51.7dBm@450.125MHz C321 CR306 L304 -52.6dBm@526.925MHz 100pF 180nH C306 T301 XFMR C309 C308 100pF R306 R307 100pF C312...

  • Page 169: Uhf Band 2 Receiver Back End Schematic Diagram

    Circuit Board/Schematic Diagrams and Parts List 6C-17 L331 R343 2.20uH Vdd_FILTERED Vdda C382 (SOURCE) 10uF DEMOD R350 C348 C347 C345 C344 C346 100K 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF C390 C329 100pF 0.1uF C343 0.22uF R344 R345 R355 2.628V 3.185V Q320 C342 C357 C384...

  • Page 170: Uhf Band 2 Synthesizer Schematic Diagram

    6C-18 Circuit Board/Schematic Diagrams and Parts List U210 C257 U211 TC7ST04FU 100pF C296 C265 TC7ST04FU 0.1uF C258 7.5V .01uF 1.65V U247 ADP3300 C259 SWB+ .01uF CR201 (SOURCE) C294 C293 C291 100pF 0.47uF 3 K3 A3 4 0.47uF L202 4V_3.3V A2 5 U248 2 K2 2.2uH...

  • Page 171: Uhf Band 2 Voltage Controlled Oscillator Schematic Diagram

    Circuit Board/Schematic Diagrams and Parts List 6C-19 C281 R245 100pF R242 C250 C276 C285 L243 4.3pF C286 4.6V 2.2uF 100pF 0.1uF RESONATOR C246 100pF L281 L273 R241 390nH 18nH C242 4.3pF C272 C273 1.1pF 0.1uF C243 L271 L242 R244 4.3pF 27nH 22nH C245...

  • Page 172: Uhf Band 2 Transmitter Schematic Diagram

    6C-20 Circuit Board/Schematic Diagrams and Parts List E101 BEAD R102 UNSWB+ L107 C114 C123 C108 33.47nH 100pF 10uF 100pF L105 390nH C172 UNSWB+ 0.1uF R106 C109 L106 100pF 7.66nH Microstrip Microstrip R172 L109 L108 C121 C160 L112 4.22nH 11.03nH 100pF 56pF 390nH Q110...

  • Page 173: Uhf Band 2 Radio Parts List

    Circuit Board/Schematic Diagrams and Parts List 6C-21 UHF Band 2 Radio Parts List Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Part No. Part No. Part No. Circuit Motorola Description C171 2113743N50 100pF C265 Not Placed C333 Not Placed Part No.
  • Page 174 C503 2113743N50 100pF FL401 4870368G02 Osc Xtal 38.4kHz L340 2462587V41 390nH, 10% C428 2113743M24 0.1uF, +80%/-20% C505 2113743N50 100pF not used in GP328 L400 2462587Q42 390nH, 10% C429 2113743M24 0.1uF, +80%/-20% C511 2113743N50 100pF H101 2680499Z01 Heat Spreader L401 2462587Q42...
  • Page 175 Volume Switch R108 0662057M92 5.6K R316 0662057A96 R419 0662057M67 SH100 2680507Z01 Harmonic Filter Shield R109 0662057N30 200K R317 0662057M74 not used in GP328 SH101 2680510Z01 PA Shield R110 0662057M61 R318 0662057A79 R420 0662057B46 10MEG SH201 2680511Z01 Synthersizer Top Shield R111 0662057M33...

  • Page 176: Circuit Board/Schematic Diagrams And Parts List

    4802245J51 6.8V Zener VR445 4802245J53 10V Zener VR446 4802245J53 10V Zener VR447 4802245J53 10V Zener VR448 4802245J53 10V Zener VR449 4802245J53 10V Zener VR450 4802245J53 10V Zener VR501 4813830A18 6.8V Zener VR506 4802245J51 6.8V Zener * Motorola Depot Servicing only...

  • Page 177: Circuit Board/Schematic Diagrams And Parts List

    Circuit Board/Schematic Diagrams and Parts List 6C-25 Circuit Board/Schematic Diagrams and Parts List R410 C423 E407 E409 PB503 PB502 PB504 PB501 R437 E408 R418 C505 VR440 C521 SH323 R300 C502 VR444 R352 C397 FL201 B504 B503 R351 R334 RT301 R316 R314 R507 FL301...

  • Page 178: Uhf Band 2 (450-527Mhz) Main Board Bottom Side Pcb No. 8485641Z06

    6C-26 Circuit Board/Schematic Diagrams and Parts List M101 M400 M301 C523 C522 VR442 VR441 C436 E404 C437 E405 R426 L505 C334 C345 R420 E406 R343 VR506 L330 C359 E403 C382 S502 C277 L331 C338 C330 R414 C358 Y201 Q302 B501 E402 C279 C357...

  • Page 179: Uhf Band 2 Controls And Switches Schematic Diagram

    Circuit Board/Schematic Diagrams and Parts List 6C-27 B501 L505 BATTERY_CONTACT 390nH RADIO_CODE 2 DATA UNSWB+ BATT_CODE 1 NEG BATT + F501 3 POS S502 CONN_J SWITCH BATT – MECH_SWB+ B503 LI_ION B504 C502 VR506 CR501 VR439 C503 0.47uF 6.8V 100pF Vdda R507 Vdda...

  • Page 180: Uhf Band 2 Receiver Front End Schematic Diagram

    6C-28 Circuit Board/Schematic Diagrams and Parts List DACRx C322 82pF R342 -63.8dBm@45.1MHz 100K L310 150nH R310 C315 R308 R305 C314 100pF 0.1uF R304 C380 R309 .01uF -51.7dBm@450.125MHz C321 CR306 L304 -52.6dBm@526.925MHz 100pF 180nH C306 T301 XFMR C309 C308 100pF R306 R307 100pF C312...

  • Page 181: Uhf Band 2 Receiver Back End Schematic Diagram

    Circuit Board/Schematic Diagrams and Parts List 6C-29 L331 R343 2.20uH Vdd_FILTERED Vdda C382 (SOURCE) 10uF DEMOD R350 C348 C347 C345 C344 C346 100K 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF C390 C329 100pF 0.1uF C343 0.22uF R344 R345 R355 2.628V 3.185V Q320 C342 C357 C384...

  • Page 182: Uhf Band 2 Synthesizer Schematic Diagram

    6C-30 Circuit Board/Schematic Diagrams and Parts List U210 U211 TC7ST04FU C296 C265 C257 TC7ST04FU 100pF 0.1uF C258 .01uF U247 ADP3300 SWB+ C259 .01uF (SOURCE) CR201 C294 C293 C291 0.47uF 100pF 0.47uF 4V_3.3V L202 U248 2.2uH LP2980 L203 C277 C278 2.2uH C229 100pF 10uF...

  • Page 183: Uhf Band 2 Voltage Controlled Oscillator Schematic Diagram

    Circuit Board/Schematic Diagrams and Parts List 6C-31 C281 R245 100pF R242 C250 C276 C285 L243 4.3pF C286 4.6V 2.2uF 100pF 0.1uF RESONATOR C246 100pF L281 L273 R241 390nH 18nH C242 4.3pF C272 C273 1.1pF 0.1uF C243 L271 L242 R244 4.3pF 27nH 22nH C245...

  • Page 184: Uhf Band 2 Transmitter Schematic Diagram

    6C-32 Circuit Board/Schematic Diagrams and Parts List E101 R102 BEAD UNSWB+ L107 C123 10uF 33.47nH C114 100pF C172 C109 L106 0.1uF UNSWB+ 100pF 7.66nH Microstrio TX_OUT R106 Microstrio Q110 R172 C121 C160 L108 L112 R175 R191 100pF 4.22nH 56pF 390nH Microstrio C118 C111...

  • Page 185: Uhf Band 2 Radio Parts List

    2113743L41 10000pF, 10% B503 3980502Z01 Backup battery B+ C172 2113743E20 0.10uF, 10% C259 2113743L41 10000pF, 10% C326 2113743L41 10000pF, 10% (not used in GP328) C173 2113743M08 22000pF, +80%/-20% C260 2113743N50 100pF C327 2113743N50 100pF B504 3980501Z01 Backup battery B- C174...
  • Page 186 390nH C435 2113743M24 100000pF, +80%/-20% C525 2113743N50 100pF J403 0905505Y02 20-pin connector L411 2462587Q42 390nH C436 2113743N34 22pF (not used in GP328) C526 2113743N50 100pF L101 2460591B28 13.37nH L505 2462587Q42 390nH C437 2113743N34 22pF (not used in GP328) C527 2113743N50...
  • Page 187 0662057M90 4700 Q320 4805218N63 RF NPN transistor R253 0662057M95 7500 R348 0662057M87 3600 R461 0662057M56 180 (not used in GP328) Q400 4809579E18 Mosfet P - channel R254 0662057M96 8200 R349 0662057C01 R462 0662057M98 10K (not used in GP328) Q403 4813824A17...
  • Page 188 6.8V Zener VR506 4802245J73 ZENER DIODE-6.8V Y201 NOT PLACED 8485641Z06 UHF B2 main PC board * Motorola Depot Servicing only Note: Tolerance Capacitor - 5% unless specified otherwise Inductor - 10% unless specified otherwise Resistor - 5% unless specified otherwise...

  • Page 189: Troubleshooting Charts

    Troubleshooting charts 6C-37 Troubleshooting charts MCU Check Press PTT. Red LED does not Before replacing light up Not able to pro- Power Up MCU, check SPI gram RF Board AUDIO Audio at Alert Tone clock, SPI data, J403 Audio AudioPA and RF IC select at Pin 2 &...

  • Page 190: Troubleshooting Flow Chart For Receiver (Sheet 1 Of 2)

    6C-38 Troubleshooting charts START Bad SINAD Bad 20dB Quieting No Recovered Audio Audio at pin Check Controller 27 of U301? Spray of inject 1st IF into XTAL Filter IF Freq: 45.1MHz Check Q320 bias circuitry for faults. Audio heard? Rotate Freq. Knob Check 2nd LO Control Voltage at C363 Activity on...

  • Page 191: Troubleshooting Flow Chart For Receiver (Sheet 2 Of 2)

    Troubleshooting charts 6C-39 Inject RF into J101 Trace IF signal Q302 collec- from L311 to IF Signal at tor OK? Q302. Check for L311? IF signal bad XTAL filter. present? Before replacing U301, check U301 voltages; 1st LO O/P trace IF signal RF Signal at Check FGU path.

  • Page 192: Troubleshooting Flow Chart For Transmitter

    6C-40 Troubleshooting charts START No Power Is There B+ Check Q111 Bias for Ant switch Is Control Volt- Check PCIC Is Current age High or Low High Check Drive to Module 1. Check Pin Diodes 2. Check Harmonic Filter Is Drive Troubleshoot Inspect/Repair Tx.

  • Page 193: Troubleshooting Flow Chart For Synthesizer

    Troubleshooting charts 6C-41 Check U248, 3.3V at U201 Start L201 & L202 pins 5, 20, 34 & Visual Correct Check CR201, U210, check of the U211, C258, C259 & Problem Board OK? C228 16.8MHz Is 16.8MHz Is U201 Pin 47 at pin 6 of Replace signal at...

  • Page 194: Troubleshooting Flow Chart For Vco

    6C-42 Troubleshooting charts START Change U241 No LO? Change L253 O/C? L253 Pin 10 TRB = 5V? Tx Carrier? >1V? VCO OK Check R245 for dry joint or faulty AUX 3 Check High? R260 Check U201 Pin 2 for 3.2V Change L243 V ctrl 0V...
  • Page 195 Section 6D MODEL CHART AND TEST SPECIFICATIONS (330-400 MHZ) Model Chart GP Series, 330-400 MHz Model Description AZH25PDC9AA3 GP328 330-400 MHz 4W 16 CH AZH25PDH9AA6 GP338 330-400 MHz 4W 128 CH Item Description PMUD1536 GP328 Super Tanapa 330-400 MHz 4W PMUD1537...
  • Page 196 330-400MHz 330-400MHz RF Output High NiMH @ 7.5V: Frequency: 330-400 MHz Frequency 330-400 MHz Channel Capacity: GP328 : 16 Channels Channel Spacing 12.5/20/25 kHz GP338 : 128 Channels 7.5 Volts ±20% Freq. Stability 0.00025% Power Supply: (-30°C to +60°C) Dimensions Spurs/Harmonics: -36 dBm <...

  • Page 197: Power Amplifier

    Transmitter 6D-3 Transmitter P CI C Antenna Vcontrol Vcontrol Jack Antenna Switch/ From VCO PA-Final Harmonic Filter/ Driver Stage Matching Network Figure 6-1: Transmitter Block Diagram General (Refer to Figure 6-1) The VHF transmitter contains five basic circuits: 1. power amplifier 2.
  • Page 198 6D-4 Transmitter 3.1.2 Antenna Switch The antenna switch circuit consists of two PIN diodes (CR101 and CR102), a pi network (C107, L104 and C106), and two current limiting resistors (R101, R170). In the transmit mode, B+ at PCIC (U102) pin 23 will go low and turn on Q111 where a B+ bias is applied to the antenna switch circuit to bias the diodes "on".
  • Page 199 Receiver 6D-5 Receiver Antenna Pin Diode Varactor Varactor Antenna Crystal RF Amp Mixer IF Amp Tuned Filter Tuned Filter Switch RF Jack Filter First LO from FGU Control Voltage from ASFIC Recovered Audio Demodulator Squelch U301 RSSI Synthesizer 16.8 MHz Reference Clock SPI Bus Second...
  • Page 200 6D-6 Receiver The output of the post-RF amplifier filter which is connected to the passive double balanced mixer consists of T301, T302 and CR306. Matching of the filter to the mixer is provided by C381. After mixing with the first LO signal from the voltage controlled oscillator (VCO) using low side injection, the RF signal is down-converted to the 45.1 MHz IF signal.
  • Page 201 Receiver 6D-7 Automatic Gain Control Circuit (Refer to 330-400MHz Receiver Front End Schematic Diagram on page 6D-16) The front end automatic gain control circuit is to provide automatic gain reduction of the front end RF amplifier via feedback. This action is necessary to prevent overloading of backend circuits. This is achieved by drawing some of the output power from the RF amplifier’s output.
  • Page 202 6D-8 Frequency Generation Circuitry Frequency Generation Circuitry Dual Tran- sistor Voltage Multiplier Rx Out Matching Pass Mixer Network Filter Aux3 VCOBIC Rx VCO Circuit Vmult1 U241 Aux4 Synthesizer Vmult2 U201 Loop Filter Tx Out Attenuator PA Driver 16.8 MHz Ref. Osc. MOD Out Tx VCO Circuit Modulating...
  • Page 203 Frequency Generation Circuitry 6D-9 Synthesizer (Refer to 330-400MHz Synthesizer Schematic Diagram on page 6D-18) The Fractional-N Synthesizer uses a 16.8MHz crystal (FL201) to provide a reference for the system. The LVFractN IC (U201) further divides this to 2.1MHz, 2.225MHz, and 2.4MHz as reference frequencies.
  • Page 204 6D-10 Frequency Generation Circuitry VCO - Voltage Controlled Oscillator (Refer to 330-400MHz Voltage Controlled Oscillator Schematic Diagram on page 6D-19) AUX3 (U201 Pin2) Level Shifter AUX4 (U201 Pin3) Network U201 Pin 32 Prescaler Out TRB_IN Pin 20 Pin 19 Pin 12 Pin7 Rx-SW TX/RX/BS...
  • Page 205 Frequency Generation Circuitry 6D-11 The VCOBIC(U241) is operated at 4.54 V (VSF) and Fractional-N synthesizer (U201) at 3.3V. This difference in operating voltage requires a level shifter consisting of Q260 and Q261 on the TRB line. The operation logic is shown in Table 6-1. Table 6-1: Level Shifter Logic Desired AUX 4...
  • Page 206 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 multime- ter or equivalent. Transmitter measurements should be made with a 1.2 µH choke in series with the voltage probe to prevent circuit loading.
  • Page 207 Circuit Board/Schematic Diagrams and Parts List 6D-13 Circuit Board/Schematic Diagrams and Parts List R410 E408 E407 E409 PB504 PB503 PB502 PB501 R418 VR440 C521 SH323 R300 R352 C397 B504 FL201 B503 R314 RT301 R321 VR501 C328 C363 R335 C325 C362 U405 U406 R338...
  • Page 208 6D-14 Circuit Board/Schematic Diagrams and Parts List M301 M101 M400 C523 C522 SH402 E405 SH322 C437 L505 E404 VR506 C359 L330 E406 C277 C338 C358 C357 E402 R350 C344 C390 C278 R344 U248 C383 C360 R415 R311 C346 C361 R312 C215 C433 C343...
  • Page 209 Circuit Board/Schematic Diagrams and Parts List 6D-15 B501 L505 BATTERY_CONTACT 390nH RADIO_CODE 2 DATA UNSWB+ BATT_CODE 1 NEG BATT + F501 3 POS S502 CONN_J SWITCH BATT – MECH_SWB+ B503 LI_ION B504 C502 VR506 CR501 VR439 C503 0.47uF 6.8V 100pF Vdda R507 Vdda...
  • Page 210 6D-16 Circuit Board/Schematic Diagrams and Parts List DACRx C322 82pF R342 -59.5dBm@45.1MHz 100K L310 150nH C315 R310 R308 R305 C314 100pF 0.1uF R304 C380 R309 .01uF -52.5dBm@330.225MHz C321 CR306 L304 -53.5dBm@399.725MHz 100pF 180nH C306 T301 XFMR C309 C308 100pF R306 R307 100pF 2.285V...
  • Page 211 Circuit Board/Schematic Diagrams and Parts List 6D-17 L331 R343 2.20uH Vdd_FILTERED Vdda C382 (SOURCE) 10uF DEMOD R350 C348 C347 C345 C344 C346 100K 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF C390 C329 100pF 0.1uF C343 0.22uF R344 R345 R355 2.628V 3.185V Q320 C342 C357 C384...
  • Page 212 6D-18 Circuit Board/Schematic Diagrams and Parts List U210 C257 U211 TC7ST04FU C296 C265 100pF TC7ST04FU 0.1uF C258 7.5V .01uF 1.65V U247 ADP3300 C259 SWB+ .01uF CR201 (SOURCE) C294 C293 C291 100pF 10uF 0.47uF 3 K3 A3 4 L202 4V_3.3V A2 5 U248 2 K2 2.2uH...
  • Page 213 Circuit Board/Schematic Diagrams and Parts List 6D-19 C281 R245 100pF R242 C250 L243 C276 C285 C286 7.5pF 4.6V 2.2uF 0.1uF 100pF RESONATOR C246 R241 L281 L273 100pF 390nH 39nH C242 7.5pF C272 C273 0.1uF C243 L242 R244 L271 6.8pF 390nH 56nH RX_INJ C245...
  • Page 214 6D-20 Circuit Board/Schematic Diagrams and Parts List E101 R102 BEAD 0.075 UNSWB+ L107 C114 C123 C108 33.47nH 330pF 10uF 330pF L105 C172 390nH UNSWB+ 0.1uF R106 C109 L106 100pF 7.66nH Microstrip Microstrip R172 C160 L108 C121 L109 L112 100pF 15pF Q110 56nH 11.03nH...
  • Page 215 2113743N50 100pF C341 2180478Z20 B503 3980502Z01 Backup Battery Contact, B+ C193 2113743M24 100000pF C278 2311049A57 10uF C342 2180478Z20 ( not used in GP328) C201 2113743N50 100pF C279 2104993J02 2.2uF C343 2113743A23 0.22uF B504 3980501Z01 Backup Battery Contact, B- C202 2113743L17...
  • Page 216 C502 2311049A05 0.47uF, 25V FL401 4870368G02 Real Time Clock Crystal Oscil- L340 2462587V41 390nH C422 2113743M24 100000pF C503 2113743N50 100pF lator (not used in GP328) L400 2462587Q42 390nH C423 2113743N50 100pF C505 2113743N50 100pF H101 2680499Z01 Heat Spreader L401 2462587Q42...
  • Page 217 1000 R418 0662057M01 SH301 2680554Z01 Receiver Front End Top * Motorola Depot Servicing only R304 0662057N01 R419 0662057M67 510 (not used in GP328) Shield R305 0662057M66 R420 0662057B46 10M (not used in GP328) SH302 2680555Z01 Receiver Front End Bottom R306...
  • Page 218 6D-24 Circuit Board/Schematic Diagrams and Parts List Circuit Board/Schematic Diagrams and Parts List R410 E407 E409 PB504 R437 PB503 PB502 PB501 VR440 C521 SH323 R300 R352 C397 FL201 R314 RT301 CR310 R321 VR501 C363 C328 R335 C325 C362 U405 L332 R338 U406 J400...
  • Page 219 Circuit Board/Schematic Diagrams and Parts List 6D-25 M301 M101 M400 C523 C522 E404 C437 L505 E406 VR506 L330 C359 C277 S502 C338 C358 Y201 C357 E401 R350 C344 C390 C278 FL401 R344 B501 C383 U248 C360 R311 C346 R415 U301 C525 C215 C361...
  • Page 220 6D-26 Circuit Board/Schematic Diagrams and Parts List RADIO_CODE B501 L505 UNSWB+ BATTERY_CONTACT 390nH BATT_CODE DATA BATT+ F501 CONN_J BATT- S502 SWITCH MECH_SWB+ LI_ION B503 TAB2 B504 C502 VR506 CR501 VR439 C503 0.47uF TAB1 6.8V 100pF R507 C505 6.8V VR501 100pF Vdda M101 PB501...
  • Page 221 Circuit Board/Schematic Diagrams and Parts List 6D-27 DACRx C322 82pF R342 100K L310 150nH C315 R308 R310 R305 C314 100pF 0.1uF R304 R309 C380 .01uF L304 C321 CR306 180nH 100pF C306 T301 XFMR C309 C308 100pF R306 R307 100pF C312 100K 100K C310...
  • Page 222 6D-28 Circuit Board/Schematic Diagrams and Parts List L331 R343 2.20uH Vdd_FILTERED Vdda C382 (SOURCE) 10uF DEMOD R350 C348 C347 C345 C344 C346 100K 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF C390 C329 100pF 0.1uF C343 0.22uF R344 R345 R355 2.628V 3.185V Q320 C342 C357 C384...
  • Page 223 Circuit Board/Schematic Diagrams and Parts List 6D-29 U210 C257 U211 TC7ST04FU 100pF C296 C265 TC7ST04FU 0.1uF C258 .01uF U247 ADP3300 C259 SWB+ .01uF CR201 (SOURCE) C291 C294 C293 100pF 0.47uF 10uF 3 K3 A3 4 4V_3.3V L202 U248 2 K2 A2 5 2.2uH L203...
  • Page 224 6D-30 Circuit Board/Schematic Diagrams and Parts List C281 R245 100pF R242 C250 C276 C285 L243 C286 7.5pF 2.2uF 0.1uF 100pF RESONATOR C246 R241 L273 L281 100pF 390nH 39nH C242 7.5pF C272 C273 0.1uF C243 L242 L271 R244 6.8pF 390nH 56nH RX_INJ C245 2.7pF...
  • Page 225 Circuit Board/Schematic Diagrams and Parts List 6D-31 E101 BEAD R102 UNSWB+ (91G24) L107 C114 C123 33.47nH 240pF 10uF C172 0.1uF UNSWB+ R106 C109 L106 100pF 7.66nH Microstrip Microstrip R172 TX_OUT L108 L109 C121 C160 L112 (91A11) 11.03nH 100pF 100pF 56nH Microstrip Q110 C118...
  • Page 226 C323 2113743N54 150pF B503 3980502Z01 Backup Battery Contact, B+ C172 2113743E20 0.1uF C257 2113743N50 100pF C324 2113743N33 20pF ( not used in GP328) C173 2113743M08 22000pF C258 2113743L41 10000pF C325 2113743L41 10000pF B504 3980501Z01 Backup Battery Contact, B- C174 2113743L05...
  • Page 227 C520 2113743L41 10000pF FL401 4870368G02 Real Time Clock Crystal Oscil- L332 2462587N53 100nH C431 2113743N50 100pF C521 2113743L41 10000pF lator (not used in GP328) L340 2462587V41 390nH C432 NOT PLACED C522 2113743L41 10000pF H101 2680499Z01 Heat Spreader L400 2462587Q42 390nH...
  • Page 228 0662057M74 1000 R460 0662057M90 4700 Q316 NOT PLACED R253 0662057N03 R348 0662057M87 3600 R461 0662057M56 180 (not used in GP328) Q320 4805218N63 RF NPN Transistor R254 0662057M92 5600 R349 0662057C01 R462 0662057M98 10k (not used in GP328) Q400 4809579E18 P-chan MOSFET...
  • Page 229 Zener Diode - 10V VR450 4802245J75 Zener Diode - 12V VR460 4802245J73 Zener Diode - 6.8V VR501 4813830A18 Zener Diode - 6.8V VR506 4802245J73 Zener Diode - 6.8V Y201 NOT PLACED 8485726Z04 UHF Band 3 Main PCB * Motorola Depot Servicing only...
  • Page 230 6D-36 Circuit Board/Schematic Diagrams and Parts List...

  • Page 231: Troubleshooting Flow Chart For Controller

    Troubleshooting charts 6D-37 Troubleshooting charts MCU Check Press PTT. Red LED does not Before replacing light up Not able to pro- Power Up MCU, check SPI AUDIO Audio at gram RF Board Alert Tone clock, SPI data, J403 Audio AudioPA and RF IC select at Pin 2 &...
  • Page 232 6D-38 Troubleshooting charts START Bad SINAD Bad 20dB Quieting No Recovered Audio Audio at pin Check Controller 27 of U301? Spray of inject 1st IF into XTAL Filter IF Freq: 45.1MHz Check Q320 bias circuitry for faults. Audio heard? Rotate Freq. Knob Check 2nd LO Control Voltage at C363 Activity on...
  • Page 233 Troubleshooting charts 6D-39 Inject RF into J101 Trace IF signal Q302 collec- from L311 to IF Signal at tor OK? Q302. Check for L311? IF signal bad XTAL filter. present? Before replacing U301, check U301 voltages; 1st LO O/P trace IF signal RF Signal at Check FGU path.
  • Page 234 6D-40 Troubleshooting charts START No Power Is There B+ Check Q111 Bias for Ant switch Is Control Volt- Check PCIC Is Current age High or Low High Check Drive to Module 1. Check Pin Diodes 2. Check Harmonic Filter Is Drive Troubleshoot Inspect/Repair Tx.
  • Page 235 Troubleshooting charts 6D-41 Check U248, 3.3V at U201 Start L201 & L202 pins 5, 20, 34 & Visual Check CR201, U210, Correct check of the U211, C258, C259 & Problem Board OK? C228 Is U201 Pin 47 Is 16.8MHz 16.8MHz at pin 6 of Replace AT = 13 VDC...
  • Page 236 6D-42 Troubleshooting charts START Change U241 No LO? Change L253 O/C? L253 Pin 10 TRB = 5V? Tx Carrier? >1V? VCO OK Check R245 for dry joint or faulty AUX 3 Check High? R260 Check U201 Pin 2 for 3.2V Change L243 V ctrl 0V...

  • Page 237: Model Charts

    AZH25BEC9AA3 GP328 29-42 MHz 6W 16CH AZH25BEH9AA6 GP338 29-42 MHz 6W 128CH Item Description PMUB1011 GP328 Super Tanapa 29-42 MHz 6W PMUB1013 GP338 Super Tanapa 29-42 MHz 6W PMUB1018 GP328 Tanapa 29-42 MHz 6W PMUB1020 GP338 Tanapa 29-42 MHz 6W...
  • Page 238 GP338 User Guide x = Indicates one of each is required. GP Series, LB2, 35-50 MHz Model Description AZH25CEC9AA3 with GP328 35-50 MHz 6W (w/o keypad camouflage) option AZQ203AL AZH25CEH9AA6 with GP338 35-50 MHz 6W (keypad, camouflage) option AZQ203AM Item...

  • Page 239: Specifications

    High NiMH @ 7.5V: Frequency: 29-42 MHz Frequency 29-42 MHz 35-50 MHz 35-50 MHz Channel Capacity: GP328 : 16 Channels Channel Spacing 12.5/20/25 kHz GP338 : 128 Channels 7.5 Volts ±20% Freq. Stability 0.0010% Power Supply: (-30°C to +60°C) Dimensions Spurs/Harmonics: -36 dBm <...

  • Page 240: Transmitter

    6E-4 Transmitter Transmitter Antenna switch bias SPI bus P C I C Antenna Matching Gate bias Vcontrol Network PowerAmplifier (PA) PA F i n a l Antenna Switch/ From Driver Sta g e Harmonic Filter Figure 6-1: Lowband Transmitter Block Diagram General (Refer to Figure 6-1) The Lowband transmitter consists of the following basic circuits:...

  • Page 241: Temperature Cut Back Circuit

    Transmitter 6E-5 3.1.2 Antenna Switch The antenna switch circuit consists of two pin diodes (D100 and D101), a RF network (C147 and L103), and a DC feed network (L104, C144 and current limiting resistor R101). In the transmit mode, PCIC (U102) pin 32 goes high supplying current via the feed network to bias the diodes “on”. The shunt diode (D101) shorts out the receiver port and L103 is connected from the RF path to ground.

  • Page 242: Receiver

    6E-6 Receiver Receiver Antenna Lowpass Lowpass Antenna Crystal Highpass Mixer RF Amp IF Amp Switch Filter Jack Filter Filter Filter Processing First LO from FGU Recovered Audio Demodulator Squelch IF IC U303 RSSI Synthesizer 17.0 MHz Reference Clock SPI Bus Second LO VCO Figure 6-2: Lowband Receiver Block Diagram...

  • Page 243: Receiver Back-End

    Receiver 6E-7 Receiver Back-End The output of crystal filter FL301 is connected to the input of IF amplifier transistor U301. Components L303 and C348 and R301 form the termination for the crystal filter and the signal is coupled to one gate of U301 by C303.

  • Page 244: Frequency Generation Circuitry

    6E-8 Frequency Generation Circuitry Frequency Generation Circuitry Voltage Switching Network Multiplier Aux2 Aux3 Synthesizer Mixer Indmult U205 RX VCO Loop Filter To PA Driver 17.0 MHz MOD Out Buffer Ref. Osc. TX VCO Modulating Prescalar input Signal Figure 6-3: Lowband Frequency Generation Unit Block Diagram The frequency generation circuit, shown in Figure 6-3 , is composed of Low Voltage Fractional-N synthesizer U205 and discrete RX VCO, TX VCO.and buffers as well other supporting circuitry.

  • Page 245: Synthesizer

    Frequency Generation Circuitry 6E-9 Synthesizer The Fractional-N synthesizer, shown in Figure 6-4, uses a 17.0 MHz crystal (Y201) to provide a reference for the system. Along with being used in the LVFracN, the 17.0 MHz signal is provided at pin 19 of U205 for use by the ASFIC and LVZIF. The LVFractN IC (U205) further divides this by 8 internally to give 2.125 MHz to be used as the reference frequency in the frequency synthesis.

  • Page 246: Vco - Voltage Controlled Oscillator

    6E-10 Frequency Generation Circuitry VCO - Voltage Controlled Oscillator 5.2.1 Receive VCO The receive VCO is a Colpitts type design and using two active devices in parallel, Q202 and Q204. The oscillator is powered off of the 4.3 volt super filter supply when the AUX3 line goes low. The oscillator operates from 139 to 160 MHz, and the frequency is tuned by varactor diodes CR201 and CR202.

  • Page 247: 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 multime- ter or equivalent. Transmitter measurements should be made with a 1.2 µH choke in series with the voltage probe to prevent circuit loading.
  • Page 248 6E-12 Notes For All Schematics and Circuit Boards...

  • Page 249: Circuit Board/Schematic Diagrams And Parts List

    Circuit Board/Schematic Diagrams and Parts List 6E-13 Circuit Board/Schematic Diagrams and Parts List VIEWED FROM SIDE 1 SH400 VR502 VR500 R410 E407 PB503 E409 PB502 SH303 PB504 PB501 R437 SH302 R305 C303 SH301 C309 FL301 B503 B504 C308 U406 U301 L308 R310 U405...

  • Page 250: Lowband 29-42/35-50Mhz Main Board Bottom Side Pcb No. 8486291A02

    6E-14 Circuit Board/Schematic Diagrams and Parts List VIEWED FROM SIDE 2 M301 M300 M400 VR200 VR201 SH300 SH402 C281 C332 C436 E405 C331 R318 C437 C319 U200 E404 C333 E406 S502 C337 L307 CR200 C335 C307 C330 E402 VR203 R309 C280 C328 FL401...

  • Page 251: Lowband 29-42/35-50Mhz Controls And Switches Schematic Diagram

    Circuit Board/Schematic Diagrams and Parts List 6E-15 PB502 SWITCH IF280 IF228 IF278 SB1_1 SB1_2 IF227 IF277 C204 VR200 PTT_1 PTT_2 IF215 IF265 6.8V .01uF RESET_1 RESET_3 IF210 IF260 EMER_1 EMER_3 PB503 IF220 IF270 SWITCH IF230 LVZIF_SEL_1 LVZIF_SEL_2 IF216 IF266 VR203 RSSI_1 RSSI_2 10.0V...

  • Page 252: Lowband 29-42/35-50Mhz Overall Receiver Schematic Diagram

    6E-16 Circuit Board/Schematic Diagrams and Parts List IF317 RTA3 Software Package S501 - Freq. switch IF318 S501 RTA0 SWITCH Conventional/MDC 4080710Z01 - 16 position IF319 RTA1 IF320 5 Tone 4080710Z02 - continous RTA2 GND GND1 C511 C512 C513 C514 100pF 100pF 100pF 100pF...

  • Page 253: Lowband 29-42/35-50Mhz Receiver Front End Schematic Diagram

    Circuit Board/Schematic Diagrams and Parts List 6E-17 C516 C507 R505 0.1uF 30pF L508 68nH R509 R507 R508 -26.5 dBm T501 C535 C537 XFMR 3.25 Vdc D501 3.9pF C522 L504 R504 L503 L507 560nH 150nH -24.5 dBm .01uF C534 C536 C515 27pF 8.2pF C506...

  • Page 254: Lowband 29-42/35-50Mhz Receiver Back End Schematic Diagram

    6E-18 Circuit Board/Schematic Diagrams and Parts List R318 L307 2.2uH 3 Vdc C319 10uF AGC PROCESSING C321 .022uF U302 TC7SU04F C320 0.22uF R306 R308 RSSI 1.3K L305 C323 390nH 1.5 Vdc R307 .022uF IF AMPLIFIER 5.6K R309 1.5 Vdc C307 0.1uF 1.5 Vdc R305...

  • Page 255: Lowband 29-42/35-50Mhz Synthesizer Schematic Diagram

    Circuit Board/Schematic Diagrams and Parts List 6E-19 C233 .01uF U204 ADP3300 5 IN SWB+ Y201 C232 75Z03 C234 0.47uF 0.47uF 17 MHz R219 2.7 V p-p 1.3 - 3.5 Vdc C236 C237 100pF CR211 2.7pF C286 C242 D210 47pF .01uF Vdda C285 .01uF...

  • Page 256: Lowband 29-42/35-50Mhz Voltage Controlled Oscillator Schematic Diagram

    6E-20 Circuit Board/Schematic Diagrams and Parts List 0 Vdc TX CR204 U207 4.45 Vdc RX AUX3 C218 R203 0.15 Vdc RX .01uF 4.56 Vdc 3.25 Vdc TX 0 Vdc RX L202 C227 4.52 Vdc TX 1.35uH .01uF AUX2 C297 3.23 Vdc RX C219 PRE_IN CR203...

  • Page 257: Lowband 29-42/35-50Mhz Transmitter Schematic Diagram

    Circuit Board/Schematic Diagrams and Parts List 6E-21 R1 29.7 - 42 MHz R2 35 - 50 MHz Designator Part Number Value Part Number Value C103 2113740L25 20 pF 2113740L24 18 pF IF101 R102 C106 2113740L37 62 pF 2113740L35 51 pF BATT_B+_4 C107 2113740L39...

  • Page 258: Lowband 29-42/35-50Mhz Radio Parts List

    6E-22 Circuit Board/Schematic Diagrams and Parts List Lowband 29-42/35-50MHz Radio Parts Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description List Part No. Part No. Part No. C148 2113740F38 30pF C299 2311049A56 4.7uF C410 2113928N01 0.1uF Circuit Motorola C149 2113743L41 0.01uF...
  • Page 259 Circuit Board/Schematic Diagrams and Parts List 6E-23 Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Part No. Part No. Part No. Part No. C480 2113743G24 0.1uF D501 4802245J42 Ring Quad Diode L215 2409348J04 13.85nH R110 0662057M98...
  • Page 260 R429 0662057M98 SH302 2680697Z01 Shield Y201 4805875Z03 Crystal Oscillator R431 0662057N39 470K SH303 2680553Z01 Shield * Motorola depot servicing only R432 0662057N16 SH400 2680505Z01 Controller Memory Shield ** Range 2 only R434 0662057M62 SH401 2680506Z01 Controller On/Off Shield R435 0662057M81...

  • Page 261: Troubleshooting Charts

    Troubleshooting charts 6E-25 Troubleshooting charts MCU Check Press PTT. Red LED does not Before replacing light up Power Up Not able to pro- MCU, check SPI Alert Tone gram RF Board AUDIO Audio at clock, SPI data, J403 Audio AudioPA and RF IC select at Pin 2 &...

  • Page 262: Troubleshooting Flow Chart For Receiver (Sheet 1 Of 2)

    6E-26 Troubleshooting charts START Bad SINAD Bad 20dB Quieting No Recovered Audio Audio at pin Check Controller 27 of U303? Spray of inject 1st IF into XTAL Filter IF Freq: 109.65 MHz Check Q301 bias circuitry for faults. Audio heard? Rotate Freq.

  • Page 263: Troubleshooting Flow Chart For Receiver (Sheet 2 Of 2)

    Troubleshooting charts 6E-27 Inject RF into J101 Trace IF signal U301 drain from L301 to IF Signal at U301. Check for L301? IF signal bad XTAL filter. present? Before replacing U303, check U303 voltages; 1st LO O/P trace IF signal RF Signal at Check FGU 310OK?

  • Page 264: Troubleshooting Flow Chart For Transmitter

    6E-28 Troubleshooting charts START No Power Is control voltage Is Current Check PCIC at U101 Pin 1 > 5 ~ 2 A? Check input to U101, Pin 16 1. Check Pin Diodes 2. Check Harmonic Filter 3. Check PA Bias Troubleshoot Is voltage >...

  • Page 265: Troubleshooting Flow Chart For Synthesizer

    Troubleshooting charts 6E-29 Check U400 3.3V at U205 Start and L225 pins 5, 20, 34 & 36 Visual Correct check of the Problem Board OK? Check C240, C247, Is 17.0 MHz 17.0MHz Is U205 Replace C246, C249, L223 Signal at signal at Pin 47 U205...

  • Page 266: Troubleshooting Flow Chart For Vco

    6E-30 Troubleshooting charts No RX LO or No No TX LO or No signal at U205 Pin signal at U205 Pin 32 in RX 32 in TX Check signal at Check signal at collector of Q201 collector of Q201 Check L204, L211, L212, Level >...

  • Page 267: Keypad-Controller Interconnect Flex

    Section 7 FLEX LAYOUT/SCHEMATIC DIAGRAMS AND PARTS LISTS Keypad-Controller Interconnect Flex <- TO KP Front Metal View From Top Side TO CTRL -> 8480475Z02 REV A J100 J200 Schematic for Keypad-Controller Interconnect Flex CONTROLLER KEYPAD J200 J100 EXT_MIC EXT_MIC VS_CS VS_CS SW_B+ SW_B+...

  • Page 268: Parts List For Keypad-Controller Interconnect Flex

    Parts List for Keypad-Controller Interconnect Flex Parts List for Keypad-Controller Interconnect Flex Reference Motorola Description Symbol Part No. J100 0980521Z01 Connector, 40 pin J200 0905505Y04 Speaker, 20 ohm Universal Connector Flex J404 J405 J406 J407 J408 J409 J410 J411 J412...

  • Page 269: Schematic For Universal Connector Flex

    J412 RSSI J413 RSSI RX_AUDIO/TX_AUDIO J414 RX_AUDIO/TX_AUDIO BOOT_CTRL J415 BOOT_CTRL J416 M401 C402 100pF Parts List for Universal Connector Flex Reference Motorola Description Symbol Part No. C402 2113740A55 Cap, 100pF M400 5085962A02 Speaker, 20 ohm M401 5013920A04 Mic, Mini electrec...
  • Page 270 Parts List for Universal Connector Flex...
  • Page 271 Service Manuals need to be updated accordingly. If you wish to be informed of these updates, kindly fill in and fax us your details. Fax to: 6-04-6124944 The Technical Publications Coordinator, Media and Communications, R&D Department, Motorola Penang. Your Details Name/Contact Person: Company Name: Address: Telephone No.: Fax No.:...
  • Page 272 Kindly take a few moments to provide feedback on this manual. Thank you for your cooperation. Fax to: 6-04-6124944 The Technical Publications Coordinator, Media and Communications, R&D Department, Motorola Penang. 1. Please check all the appropriate boxes: Disassembly Pro- cedures Alignment...

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