Maxon SD-125 Service Manual
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Maxon SD-125 Service Manual

Rf link module
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SERVICE
MANUAL
Maxon America, Inc. 10828 N.W. Airworld Dr. Kansas City, MO 64153 Tel: 816-891-6320 Fax: 816-891-8815
Part Number: 680-100-2004
October 1998

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  • Page 1 SERVICE MANUAL Maxon America, Inc. 10828 N.W. Airworld Dr. Kansas City, MO 64153 Tel: 816-891-6320 Fax: 816-891-8815 Part Number: 680-100-2004 October 1998...
  • Page 1 SERVICE MANUAL Maxon Electronics Australia Pty. Ltd. 36a Gibson Ave, Padstow, NSW 2211, Australia. Phone: (61) 2 9707-2000; Fax: (61) 2 9707 -3328 October 1998...

  • Page 3: Table Of Contents

    SD-125 DIGITAL BOARD (COMMON) PARTS LIST (650-010-0029) ....25 SD-125 (U1 400-430MHz) RF BOARD PARTS LIST (650-020-0027) ..... . 27 SD-125 (U2 440-470MHz) RF BOARD PARTS LIST (650-020-0026) .

  • Page 3: Table Of Contents

    SD-125 DIGITAL BOARD (COMMON) PARTS LIST (650-010-0029) ....25 SD-125 (U1 400-430MHz) RF BOARD PARTS LIST (650-020-0027) ..... . 27 SD-125 (U2 440-470MHz) RF BOARD PARTS LIST (650-020-0026) .
  • Page 4 MAXON SD-125 RF LINK MODULE VCO (400-430MHz) ............49 VCO (440-470MHz) .
  • Page 4 MAXON SD-125 RF LINK MODULE VCO (400-430MHz) ............49 VCO (440-470MHz) .

  • Page 5: Specifications

    MAXON SD-125 RF LINK MODULE SPECIFICATIONS GENERAL Equipment Type ........Data radio Performance Specifications .

  • Page 5: Specifications

    MAXON SD-125 RF LINK MODULE SPECIFICATIONS GENERAL Equipment Type ........Data radio Performance Specifications .
  • Page 6 MAXON SD-125 RF LINK MODULE Frequency Bands: VHF: V1 136.000 - 162.000 MHz 136.000 - 162.000 MHz 148.000 - 174.000 MHz 148.000 - 174.000 MHz UHF: U2 440.000 - 470.000 MHz 440.000 - 470.000 MHz 400.000 - 430.000 400.000 - 430.000 420.000 - 450.000...
  • Page 6 MAXON SD-125 RF LINK MODULE Frequency Bands: VHF: V1 136.000 - 162.000 MHz 136.000 - 162.000 MHz 148.000 - 174.000 MHz 148.000 - 174.000 MHz UHF: U2 440.000 - 470.000 MHz 440.000 - 470.000 MHz 400.000 - 430.000 400.000 - 430.000 420.000 - 450.000...
  • Page 7 MAXON SD-125 RF LINK MODULE Modulation Sensitivity ........100mV RMS @ 60 % Peak Dev.
  • Page 7 MAXON SD-125 RF LINK MODULE Modulation Sensitivity ........100mV RMS @ 60 % Peak Dev.
  • Page 8 MAXON SD-125 RF LINK MODULE AF Distortion......... . < 5% @ Nom., < 10 % @ Extreme condition RX Hum &...
  • Page 8 MAXON SD-125 RF LINK MODULE AF Distortion......... . < 5% @ Nom., < 10 % @ Extreme condition RX Hum &...
  • Page 9 MAXON SD-125 RF LINK MODULE ENVIRONMENTAL (performance without degradation unless stated) Temperature ......... . deg C Operating .
  • Page 9 MAXON SD-125 RF LINK MODULE ENVIRONMENTAL (performance without degradation unless stated) Temperature ......... . deg C Operating .
  • Page 10 MAXON SD-125 RF LINK MODULE Intentionally Left Blank PAGE-6- October 98...
  • Page 10 MAXON SD-125 RF LINK MODULE Intentionally Left Blank PAGE-6- October 98...

  • Page 11: Unpacking

    MAXON SD-125 RF LINK MODULE UNPACKING The SD-125 RF Link Module is the only item included in the shipping container. PAGE-7- October 98...

  • Page 11: Unpacking

    MAXON SD-125 RF LINK MODULE UNPACKING The SD-125 RF Link Module is the only item included in the shipping container. PAGE-7- October 98...

  • Page 12: Introduction

    16 Channels The SD-125 Series radio can store up to 16 channels within the same band. TX Time-out The TX Time-out feature, when enabled, limits the amount of time that the user can continuously transmit.

  • Page 12: Introduction

    16 Channels The SD-125 Series radio can store up to 16 channels within the same band. TX Time-out The TX Time-out feature, when enabled, limits the amount of time that the user can continuously transmit.

  • Page 13: Theory Of Operation

    MAXON SD-125 RF LINK MODULE CHANNEL SELECTOR THEORY OF OPERATION One of 16 channels may be selected using the Dip Switch (SW401). SW401 encodes the channel number, selected into INTRODUCTION 4-bit binary code. The binary code plus one equals the channel The VHF and UHF radios are comprised of two PCB's (an RF number.

  • Page 13: Theory Of Operation

    MAXON SD-125 RF LINK MODULE CHANNEL SELECTOR THEORY OF OPERATION One of 16 channels may be selected using the Dip Switch (SW401). SW401 encodes the channel number, selected into INTRODUCTION 4-bit binary code. The binary code plus one equals the channel The VHF and UHF radios are comprised of two PCB's (an RF number.

  • Page 14: Rf Circuits Pll Synthesizer

    MAXON SD-125 RF LINK MODULE ANTENNA SWITCH LEVEL SHIFTER & CHARGE PUMP When transmitting, the diodes D5 and D6 are forward biased The charge pump is used for changing output signals Fr, Fv at enabling the RF signal passage to the antenna. D6 is shorted to PLL IC from 0-5v to 0-12v necessary for controlling the VCO.

  • Page 14: Rf Circuits Pll Synthesizer

    MAXON SD-125 RF LINK MODULE ANTENNA SWITCH LEVEL SHIFTER & CHARGE PUMP When transmitting, the diodes D5 and D6 are forward biased The charge pump is used for changing output signals Fr, Fv at enabling the RF signal passage to the antenna. D6 is shorted to PLL IC from 0-5v to 0-12v necessary for controlling the VCO.
  • Page 15 MAXON SD-125 RF LINK MODULE FIRST MIXER D9, T2 and T3 are double balanced mixers which provide the 45.1 MHz intermediate frequency output. The filtered frequency from the front end module is coupled to T2 . The 45.1 MHz IF output is matched to the input of the 2-pole monolithic filter by L14, L31, C69 and C97.
  • Page 15 MAXON SD-125 RF LINK MODULE FIRST MIXER D9, T2 and T3 are double balanced mixers which provide the 45.1 MHz intermediate frequency output. The filtered frequency from the front end module is coupled to T2 . The 45.1 MHz IF output is matched to the input of the 2-pole monolithic filter by L14, L31, C69 and C97.

  • Page 16: Maintenance And Repair

    When removing or fitting, use the Exploded View and Parts List, located on page 55 in conjunction with the following procedures: • WARNING: Disconnect the SD-125 from all external equipment at the D-Sub connector prior to disassembly. REMOVING & REPLACING THE UPPER...

  • Page 16: Maintenance And Repair

    When removing or fitting, use the Exploded View and Parts List, located on page 55 in conjunction with the following procedures: • WARNING: Disconnect the SD-125 from all external equipment at the D-Sub connector prior to disassembly. REMOVING & REPLACING THE UPPER...

  • Page 17: Removing & Replacing The Rf Board

    MAXON SD-125 RF LINK MODULE Figure 3-Shield Plate Removal REMOVING & REPLACING THE RF BOARD Removing the RF Board Assembly: 1. Remove the Upper Cover (refer to Removing & Replacing the Upper Cover). 2. Remove the Digital Board Assembly and Shield Plate (refer to Removing &...

  • Page 17: Removing & Replacing The Rf Board

    MAXON SD-125 RF LINK MODULE Figure 3-Shield Plate Removal REMOVING & REPLACING THE RF BOARD Removing the RF Board Assembly: 1. Remove the Upper Cover (refer to Removing & Replacing the Upper Cover). 2. Remove the Digital Board Assembly and Shield Plate (refer to Removing &...

  • Page 18: Programming

    PROGRAMMING ALIGNMENT PROCEDURE The SD-125 Series radio requires the ACC-900 Programming The SD-125 UHF/VHF Receiver is by design, broad band Software, ACC-2000 Interface Module, 9-15 VDC 200mA covering UHF(400-430 MHz & 440-470 MHz) and Power Supply and QPA-4000 Programmer Interface Cable.

  • Page 18: Programming

    PROGRAMMING ALIGNMENT PROCEDURE The SD-125 Series radio requires the ACC-900 Programming The SD-125 UHF/VHF Receiver is by design, broad band Software, ACC-2000 Interface Module, 9-15 VDC 200mA covering UHF(400-430 MHz & 440-470 MHz) and Power Supply and QPA-4000 Programmer Interface Cable.
  • Page 19 (DM-0500 series) had their squelch level strength to CLOSE squelch (e.g. default setting is setting by hardware touch up. With the new SD-125 series, the -116dBm, that is equivalent to 0.35mV) squelch level to open or close (unmute or mute) is set up by software control.
  • Page 19 (DM-0500 series) had their squelch level strength to CLOSE squelch (e.g. default setting is setting by hardware touch up. With the new SD-125 series, the -116dBm, that is equivalent to 0.35mV) squelch level to open or close (unmute or mute) is set up by software control.
  • Page 20 MAXON SD-125 RF LINK MODULE for open and close squelch (mute LED will be OFF & unmute LED will be ON). • NOTE: The difference of RF signal strength between the unmute and mute levels must be greater than or at least equal to 0.15mV (i.e. at least -123.5dBm) for the squelch setting to work...
  • Page 20 MAXON SD-125 RF LINK MODULE for open and close squelch (mute LED will be OFF & unmute LED will be ON). • NOTE: The difference of RF signal strength between the unmute and mute levels must be greater than or at least equal to 0.15mV (i.e. at least -123.5dBm) for the squelch setting to work...

  • Page 21: Test Equipment Setup

    MAXON SD-125 RF LINK MODULE TEST EQUIPMENT SETUP PAGE-17- October 98...

  • Page 21: Test Equipment Setup

    MAXON SD-125 RF LINK MODULE TEST EQUIPMENT SETUP PAGE-17- October 98...

  • Page 22: Alignment Points Diagram

    MAXON SD-125 RF LINK MODULE ALIGNMENT POINTS DIAGRAM TC701 RV403 L203 L303 RF BOARD DIGITAL BOARD ALIGNMENT POINTS ALIGNMENT POINTS CHANNEL NO. SWITCH POSITION SW401 CHANNEL SELECT SWITCH PAGE-18- October 98...

  • Page 22: Alignment Points Diagram

    MAXON SD-125 RF LINK MODULE ALIGNMENT POINTS DIAGRAM TC701 RV403 L203 L303 RF BOARD DIGITAL BOARD ALIGNMENT POINTS ALIGNMENT POINTS CHANNEL NO. SWITCH POSITION SW401 CHANNEL SELECT SWITCH PAGE-18- October 98...

  • Page 23: Component Replacement

    MAXON SD-125 RF LINK MODULE surface mount component and any flux on the COMPONENT REPLACEMENT printed circuit board. Surface Mount Components Surface Mount Component Replacement Surface mount components should always be replaced using a 1. “Tin” one terminal end of the new component and temperature controlled soldering system.

  • Page 23: Component Replacement

    MAXON SD-125 RF LINK MODULE surface mount component and any flux on the COMPONENT REPLACEMENT printed circuit board. Surface Mount Components Surface Mount Component Replacement Surface mount components should always be replaced using a 1. “Tin” one terminal end of the new component and temperature controlled soldering system.

  • Page 24: Troubleshooting Guide

    MAXON SD-125 RF LINK MODULE TROUBLESHOOTING GUIDE SYMPTOMS CAUSES COUNTERMEASURES 1. Incomplete connection 1. Check CON401 connection 2. Defective DC/DC VCC 2. Check U801 3. 5v voltage source 3. IC1 (5v ±0.2v) Unit does not work 4. PLL error 4. Check TCXO/VCO/PLL IC 5.

  • Page 24: Troubleshooting Guide

    MAXON SD-125 RF LINK MODULE TROUBLESHOOTING GUIDE SYMPTOMS CAUSES COUNTERMEASURES 1. Incomplete connection 1. Check CON401 connection 2. Defective DC/DC VCC 2. Check U801 3. 5v voltage source 3. IC1 (5v ±0.2v) Unit does not work 4. PLL error 4. Check TCXO/VCO/PLL IC 5.

  • Page 25: Voltage Chart

    MAXON SD-125 RF LINK MODULE VOLTAGE CHART CONTROL CIRCUIT TRANSISTOR REF# Q401 Q402 Q403 Q404 Q405 Q406 Q407 Q408 RF BOARD TRANSISTOR REF # 18.0 18.0 18.0 18.0 18.0 18.0 PAGE-21- October 98...

  • Page 25: Voltage Chart

    MAXON SD-125 RF LINK MODULE VOLTAGE CHART CONTROL CIRCUIT TRANSISTOR REF# Q401 Q402 Q403 Q404 Q405 Q406 Q407 Q408 RF BOARD TRANSISTOR REF # 18.0 18.0 18.0 18.0 18.0 18.0 PAGE-21- October 98...
  • Page 26 MAXON SD-125 RF LINK MODULE RF BOARD IC’S RECEIVE MODE PIN # IC3 (OFF) IC7 (OFF) IC8 (OFF) OSC1 OSC2 AUDIO AUDIO AUDIO OSC1 RF BOARD IC’S TRANSMIT MODE PIN # IC5 (OFF) 1.88 1.88 1.88 AUDIO AUDIO OSC1 PAGE-22-...
  • Page 26 MAXON SD-125 RF LINK MODULE RF BOARD IC’S RECEIVE MODE PIN # IC3 (OFF) IC7 (OFF) IC8 (OFF) OSC1 OSC2 AUDIO AUDIO AUDIO OSC1 RF BOARD IC’S TRANSMIT MODE PIN # IC5 (OFF) 1.88 1.88 1.88 AUDIO AUDIO OSC1 PAGE-22-...
  • Page 27 MAXON SD-125 RF LINK MODULE CONTROL CIRCUIT IC’S RECEIVE MODE PIN # IC402 IC403 IC404 IC405 IC406 IC407 IC408 AUDIO AUDIO AUDIO AUDIO AUDIO AUDIO AUDIO AUDIO AUDIO AUDIO AUDIO AUDIO PIN # IC401 PIN # IC401 4.63 4.63 OSC2...
  • Page 27 MAXON SD-125 RF LINK MODULE CONTROL CIRCUIT IC’S RECEIVE MODE PIN # IC402 IC403 IC404 IC405 IC406 IC407 IC408 AUDIO AUDIO AUDIO AUDIO AUDIO AUDIO AUDIO AUDIO AUDIO AUDIO AUDIO AUDIO PIN # IC401 PIN # IC401 4.63 4.63 OSC2...
  • Page 28 MAXON SD-125 RF LINK MODULE CONTROL CIRCUIT IC’S TRANSMIT MODE PIN # IC402 IC403 IC404 IC405 IC406 IC407 IC408 AUDIO AUDIO AUDIO AUDIO AUDIO AUDIO AUDIO AUDIO AUDIO AUDIO AUDIO AUDIO AUDIO AUDIO PIN # IC401 PIN # IC401 OSC2...
  • Page 28 MAXON SD-125 RF LINK MODULE CONTROL CIRCUIT IC’S TRANSMIT MODE PIN # IC402 IC403 IC404 IC405 IC406 IC407 IC408 AUDIO AUDIO AUDIO AUDIO AUDIO AUDIO AUDIO AUDIO AUDIO AUDIO AUDIO AUDIO AUDIO AUDIO PIN # IC401 PIN # IC401 OSC2...

  • Page 29: Sd-125 Digital Board (Common) Parts List (650-010-0029)

    MAXON SD-125 RF LINK MODULE SD-125 DIGITAL BOARD (COMMON) PARTS LIST (650-010-0029) REF # DESCRIPTION PART # REF # DESCRIPTION PART # C401 CAP, CER,1UF,+80-20%,16V,Y5V,0805 100-803-2105 C463 CAP, CER,0.1UF,+80-20%,25V,Y5V,0603 100-813-1104 C402 CAP, CER,0.001UF,10%,50V,X7R,0603 100-621-1102 C464 CAP, CER,0.1UF,+80-20%,25V,Y5V,0603 100-813-1104 C403 CAP, CER,0.022UF,10%,50V,X7R,0603...

  • Page 29: Sd-125 Digital Board (Common) Parts List (650-010-0029)

    MAXON SD-125 RF LINK MODULE SD-125 DIGITAL BOARD (COMMON) PARTS LIST (650-010-0029) REF # DESCRIPTION PART # REF # DESCRIPTION PART # C401 CAP, CER,1UF,+80-20%,16V,Y5V,0805 100-803-2105 C463 CAP, CER,0.1UF,+80-20%,25V,Y5V,0603 100-813-1104 C402 CAP, CER,0.001UF,10%,50V,X7R,0603 100-621-1102 C464 CAP, CER,0.1UF,+80-20%,25V,Y5V,0603 100-813-1104 C403 CAP, CER,0.022UF,10%,50V,X7R,0603...
  • Page 30 MAXON SD-125 RF LINK MODULE REF # DESCRIPTION PART # REF # DESCRIPTION PART # R418 RES, TF,10K,5%,1/16W,+/-200,0603 741-102-1103 R482 RES, TF,1K,5%,1/16W,+/-200,0603 741-102-1102 R419 RES, TF,10K,5%,1/16W,+/-200,0603 741-102-1103 R483 RES, TF,1K,5%,1/16W,+/-200,0603 741-102-1102 R420 RES, TF,9.1K,5%,1/16W,+/-200,0603 741-102-1912 R484 RES, TF,1K,5%,1/16W,+/-200,0603 741-102-1102 R421...
  • Page 30 MAXON SD-125 RF LINK MODULE REF # DESCRIPTION PART # REF # DESCRIPTION PART # R418 RES, TF,10K,5%,1/16W,+/-200,0603 741-102-1103 R482 RES, TF,1K,5%,1/16W,+/-200,0603 741-102-1102 R419 RES, TF,10K,5%,1/16W,+/-200,0603 741-102-1103 R483 RES, TF,1K,5%,1/16W,+/-200,0603 741-102-1102 R420 RES, TF,9.1K,5%,1/16W,+/-200,0603 741-102-1912 R484 RES, TF,1K,5%,1/16W,+/-200,0603 741-102-1102 R421...

  • Page 31: Sd-125 (U1 400-430Mhz) Rf Board Parts List (650-020-0027)

    MAXON SD-125 RF LINK MODULE SD-125 (U1 400-430MHz) RF BOARD PARTS LIST (650-020-0027) REF # DESCRIPTION PART # REF # DESCRIPTION PART # Cap, TA,4.7uF,20%,10V,A 102-023-0475 REPLACEMENT MODULES CAP, TA,10UF,20%,6.3V,3216,A 102-013-0106 ASSY, PCB,FRONT END,UHF,400-430MHZ 650-110-0019 CAP, CER,470PF,10%,50V,X7R,0603 100-621-1471 ASSY, PCB,PWR AMP,UHF,400-430MHZ 650-230-0017 CAP, CER,0.01UF,10%,25V,X7R,0603...

  • Page 31: Sd-125 (U1 400-430Mhz) Rf Board Parts List (650-020-0027)

    MAXON SD-125 RF LINK MODULE SD-125 (U1 400-430MHz) RF BOARD PARTS LIST (650-020-0027) REF # DESCRIPTION PART # REF # DESCRIPTION PART # Cap, TA,4.7uF,20%,10V,A 102-023-0475 REPLACEMENT MODULES CAP, TA,10UF,20%,6.3V,3216,A 102-013-0106 ASSY, PCB,FRONT END,UHF,400-430MHZ 650-110-0019 CAP, CER,470PF,10%,50V,X7R,0603 100-621-1471 ASSY, PCB,PWR AMP,UHF,400-430MHZ 650-230-0017 CAP, CER,0.01UF,10%,25V,X7R,0603...
  • Page 32 MAXON SD-125 RF LINK MODULE REF # DESCRIPTION PART # REF # DESCRIPTION PART # C909 CAP, CER,0.01UF,10%,25V,X7R,0603 100-611-1103 Q904 TRANS, NPN,KTC4075,UMT3 870-200-0031 FILTER, CER, LT-455FW,455KHZ 310-101-0010 Q905 TRANS, NPN,KTC4075,UMT3 870-200-0031 FILTER, CER,CF455HT,455KHZ 310-010-0013 RES, TF,10K,5%,1/16W,+/-200,0603 741-102-1103 CON1 CONN, SKT,18P/DIP,2.0MMST,SMT...
  • Page 32 MAXON SD-125 RF LINK MODULE REF # DESCRIPTION PART # REF # DESCRIPTION PART # C909 CAP, CER,0.01UF,10%,25V,X7R,0603 100-611-1103 Q904 TRANS, NPN,KTC4075,UMT3 870-200-0031 FILTER, CER, LT-455FW,455KHZ 310-101-0010 Q905 TRANS, NPN,KTC4075,UMT3 870-200-0031 FILTER, CER,CF455HT,455KHZ 310-010-0013 RES, TF,10K,5%,1/16W,+/-200,0603 741-102-1103 CON1 CONN, SKT,18P/DIP,2.0MMST,SMT...
  • Page 33 MAXON SD-125 RF LINK MODULE REF # DESCRIPTION PART # RES, TF,22K,5%,1/16W,+/-200,0603 741-102-1223 RES, TF,18K,5%,1/16W,+/-200,0603 741-102-1183 RES, TF,10K,5%,1/16W,+/-200,0603 741-102-1103 RES, TF,1.2K,5%,1/16W, +/-200,0603 741-102-1122 RES, TF,22K,5%,1/16W,+/-200,0603 741-102-1223 RES, TF,10,5%,1/16W,+/-200,0603 741-102-1100 RES, TF,33K,5%,1/16W,+/-200,0603 741-102-1333 RES, TF,20K,5%,1/16W,+/-200,0603 741-102-1203 RES, TF,4.7M,5%,1/16W,+/-200,0603 741-102-1475 RES, TF,1K,5%,1/16W,+/-200,0603...
  • Page 33 MAXON SD-125 RF LINK MODULE REF # DESCRIPTION PART # RES, TF,22K,5%,1/16W,+/-200,0603 741-102-1223 RES, TF,18K,5%,1/16W,+/-200,0603 741-102-1183 RES, TF,10K,5%,1/16W,+/-200,0603 741-102-1103 RES, TF,1.2K,5%,1/16W, +/-200,0603 741-102-1122 RES, TF,22K,5%,1/16W,+/-200,0603 741-102-1223 RES, TF,10,5%,1/16W,+/-200,0603 741-102-1100 RES, TF,33K,5%,1/16W,+/-200,0603 741-102-1333 RES, TF,20K,5%,1/16W,+/-200,0603 741-102-1203 RES, TF,4.7M,5%,1/16W,+/-200,0603 741-102-1475 RES, TF,1K,5%,1/16W,+/-200,0603...

  • Page 34: Sd-125 (U2 440-470Mhz) Rf Board Parts List (650-020-0026)

    MAXON SD-125 RF LINK MODULE SD-125 (U2 440-470MHz) RF BOARD PARTS LIST (650-020-0026) REF # DESCRIPTION PART # REF # DESCRIPTION PART # CAP, TA,4.7UF,20%,10V,A 102-023-0475 REPLACEMENT MODULES CAP, TA,10UF,20%,6.3V,3216,A 102-013-0106 ASSY, PCB,FRONT END,UHF,440-470MHZ 650-110-0017 CAP, CER,470PF,10%,50V,X7R,0603 100-621-1471 ASSY, PCB,PWR AMP,UHF,440-470MHZ 650-230-0016 CAP, CER,0.01UF,10%,25V,X7R,0603...

  • Page 34: Sd-125 (U2 440-470Mhz) Rf Board Parts List (650-020-0026)

    MAXON SD-125 RF LINK MODULE SD-125 (U2 440-470MHz) RF BOARD PARTS LIST (650-020-0026) REF # DESCRIPTION PART # REF # DESCRIPTION PART # CAP, TA,4.7UF,20%,10V,A 102-023-0475 REPLACEMENT MODULES CAP, TA,10UF,20%,6.3V,3216,A 102-013-0106 ASSY, PCB,FRONT END,UHF,440-470MHZ 650-110-0017 CAP, CER,470PF,10%,50V,X7R,0603 100-621-1471 ASSY, PCB,PWR AMP,UHF,440-470MHZ 650-230-0016 CAP, CER,0.01UF,10%,25V,X7R,0603...
  • Page 35 MAXON SD-125 RF LINK MODULE REF # DESCRIPTION PART # REF # DESCRIPTION PART # C907 CAP, CER,0.01UF,10%,25V,X7R,0603 100-611-1103 Q903 TRANS, PNP,KTA2014, USM 870-100-0018 C909 CAP, CER,0.01UF,10%,25V,X7R,0603 100-611-1103 Q904 TRANS, PNP,KTA2014, USM 870-100-0018 FILTER, CER, LT-455FW,455KHZ 310-101-0010 Q905 TRANS, PNP,KTA2014, USM...
  • Page 35 MAXON SD-125 RF LINK MODULE REF # DESCRIPTION PART # REF # DESCRIPTION PART # C907 CAP, CER,0.01UF,10%,25V,X7R,0603 100-611-1103 Q903 TRANS, PNP,KTA2014, USM 870-100-0018 C909 CAP, CER,0.01UF,10%,25V,X7R,0603 100-611-1103 Q904 TRANS, PNP,KTA2014, USM 870-100-0018 FILTER, CER, LT-455FW,455KHZ 310-101-0010 Q905 TRANS, PNP,KTA2014, USM...
  • Page 36 MAXON SD-125 RF LINK MODULE REF # DESCRIPTION PART # RES, TF,470K,5%,1/16W,+/-200,0603 741-102-1474 RES, TF,22K,5%,1/16W,+/-200,0603 741-102-1223 RES, TF,10K,5%,1/16W,+/-200,0603 741-102-1103 RES, TF,1.2K,5%,1/16W, +/-200,0603 741-102-1122 RES, TF,22K,5%,1/16W,+/-200,0603 741-102-1223 RES, TF,10,5%,1/16W,+/-200,0603 741-102-1100 RES, TF,33K,5%,1/16W,+/-200,0603 741-102-1333 RES, TF,20K,5%,1/16W,+/-200,0603 741-102-1203 RES, TF,4.7M,5%,1/16W,+/-200,0603 741-102-1475 RES, TF,1K,5%,1/16W,+/-200,0603...
  • Page 36 MAXON SD-125 RF LINK MODULE REF # DESCRIPTION PART # RES, TF,470K,5%,1/16W,+/-200,0603 741-102-1474 RES, TF,22K,5%,1/16W,+/-200,0603 741-102-1223 RES, TF,10K,5%,1/16W,+/-200,0603 741-102-1103 RES, TF,1.2K,5%,1/16W, +/-200,0603 741-102-1122 RES, TF,22K,5%,1/16W,+/-200,0603 741-102-1223 RES, TF,10,5%,1/16W,+/-200,0603 741-102-1100 RES, TF,33K,5%,1/16W,+/-200,0603 741-102-1333 RES, TF,20K,5%,1/16W,+/-200,0603 741-102-1203 RES, TF,4.7M,5%,1/16W,+/-200,0603 741-102-1475 RES, TF,1K,5%,1/16W,+/-200,0603...

  • Page 37: Sd-125 (V2 148-174Mhz) Rf Board Parts List (650-020-0029)

    MAXON SD-125 RF LINK MODULE SD-125 (V2 148-174MHz) RF BOARD PARTS LIST (650-020-0029) REF # DESCRIPTION PART # REF # DESCRIPTION PART # CAP, CER,0.01UF,10%,25V,X7R,0603 100-611-1103 REPLACEMENT MODULES CAP, CER,470PF,10%,50V,X7R,0603 100-621-1471 FRONT-END ASSEMBLY (SEE NOTE 1) 650-110-0012 CAP, TA,10UF,20%,10V,B,3528 102-023-1106...

  • Page 37: Sd-125 (V2 148-174Mhz) Rf Board Parts List (650-020-0029)

    MAXON SD-125 RF LINK MODULE SD-125 (V2 148-174MHz) RF BOARD PARTS LIST (650-020-0029) REF # DESCRIPTION PART # REF # DESCRIPTION PART # CAP, CER,0.01UF,10%,25V,X7R,0603 100-611-1103 REPLACEMENT MODULES CAP, CER,470PF,10%,50V,X7R,0603 100-621-1471 FRONT-END ASSEMBLY (SEE NOTE 1) 650-110-0012 CAP, TA,10UF,20%,10V,B,3528 102-023-1106...
  • Page 38 MAXON SD-125 RF LINK MODULE REF # DESCRIPTION PART # REF # DESCRIPTION PART # CON1 CONN, SKT,18P/DIP,2.0MMST,SMT 140-020-0056 RES, TF,100K,5%,1/16W,+/-200,0603 741-102-1104 DIODE, PIN,UPP9401,(T&R)50V,2.5W 220-020-0001 RES, TF,2.2K,5%,1/16W,+/-200,0603 741-102-1222 DIODE, PIN,UPP9401,(T&R)50V,2.5W 220-020-0001 RES, TF,1.8K,5%,1/16W,+/-200,0603 741-102-1182 DIODE, SCHOTTKY,CHIP,HSMS-2817#L31 220-040-0009 RES, TF,1.8K,5%,1/16W,+/-200,0603 741-102-1182...
  • Page 38 MAXON SD-125 RF LINK MODULE REF # DESCRIPTION PART # REF # DESCRIPTION PART # CON1 CONN, SKT,18P/DIP,2.0MMST,SMT 140-020-0056 RES, TF,100K,5%,1/16W,+/-200,0603 741-102-1104 DIODE, PIN,UPP9401,(T&R)50V,2.5W 220-020-0001 RES, TF,2.2K,5%,1/16W,+/-200,0603 741-102-1222 DIODE, PIN,UPP9401,(T&R)50V,2.5W 220-020-0001 RES, TF,1.8K,5%,1/16W,+/-200,0603 741-102-1182 DIODE, SCHOTTKY,CHIP,HSMS-2817#L31 220-040-0009 RES, TF,1.8K,5%,1/16W,+/-200,0603 741-102-1182...
  • Page 39 MAXON SD-125 RF LINK MODULE REF # DESCRIPTION PART # RES, TF,10K,5%,1/16W,+/-200,0603 741-102-1103 RES, TF,1.2K,5%,1/16W, +/-200,0603 741-102-1122 RES, TF,22K,5%,1/16W,+/-200,0603 741-102-1223 RES, TF,10,5%,1/16W,+/-200,0603 741-102-1100 RES, TF,33K,5%,1/16W,+/-200,0603 741-102-1333 RES, TF,20K,5%,1/16W,+/-200,0603 741-102-1203 RES, TF,300,5%,1/16W,+/-200,0603 741-102-1301 RES, TF,300,5%,1/16W,+/-200,0603 741-102-1301 RES, TF,4.7M,5%,1/16W,+/-200,0603 741-102-1475 RES, TF,1K,5%,1/16W,+/-200,0603...
  • Page 39 MAXON SD-125 RF LINK MODULE REF # DESCRIPTION PART # RES, TF,10K,5%,1/16W,+/-200,0603 741-102-1103 RES, TF,1.2K,5%,1/16W, +/-200,0603 741-102-1122 RES, TF,22K,5%,1/16W,+/-200,0603 741-102-1223 RES, TF,10,5%,1/16W,+/-200,0603 741-102-1100 RES, TF,33K,5%,1/16W,+/-200,0603 741-102-1333 RES, TF,20K,5%,1/16W,+/-200,0603 741-102-1203 RES, TF,300,5%,1/16W,+/-200,0603 741-102-1301 RES, TF,300,5%,1/16W,+/-200,0603 741-102-1301 RES, TF,4.7M,5%,1/16W,+/-200,0603 741-102-1475 RES, TF,1K,5%,1/16W,+/-200,0603...
  • Page 40 MAXON SD-125 RF LINK MODULE Intentionally Left Blank\ PAGE-36- October 98...
  • Page 40 MAXON SD-125 RF LINK MODULE Intentionally Left Blank\ PAGE-36- October 98...

  • Page 41: Component Pinout

    MAXON SD-125 RF LINK MODULE COMPONENT PINOUT MANUFACTURER'S REFERENCE NO. SCHEMATIC BASE DIAGRAM PART NUMBER 2SC5084 Q202,203,302,303 MMBR951 Q16,17,501,601 BFR92A Q12,25 KTC3875S (ALG) Q6,11,13,14,19,21 KTC4075 Q901,903,904,905 KTA2014 Q902 KTA1504S (ASG) Q7,8,407 Q18,31,32,34, KRC104S (ND) Q404,406,408 KRA104S (PD) Q5,401,402,403,405 4.7K KRA110S (NK)

  • Page 41: Component Pinout

    MAXON SD-125 RF LINK MODULE COMPONENT PINOUT MANUFACTURER'S REFERENCE NO. SCHEMATIC BASE DIAGRAM PART NUMBER 2SC5084 Q202,203,302,303 MMBR951 Q16,17,501,601 BFR92A Q12,25 KTC3875S (ALG) Q6,11,13,14,19,21 KTC4075 Q901,903,904,905 KTA2014 Q902 KTA1504S (ASG) Q7,8,407 Q18,31,32,34, KRC104S (ND) Q404,406,408 KRA104S (PD) Q5,401,402,403,405 4.7K KRA110S (NK)
  • Page 42 MAXON SD-125 RF LINK MODULE MANUFACTURER'S BASE DIAGRAM REFERENCE NO. SCHEMATIC PART NUMBER HSMS2817 1.BASE 2.COLLECTOR KTA1663 3.EMITTER 1.EMITTER 2.BASE BFG35 Q502 3.EMITTER BLT50 4.COLLECTOR 1,4,5,8:EMITTER Q503 BLT52 2,3:BASE 6,7:COLLECTOR 1SV229 D201,202,301 1SV217 D801 KDS160 D802 MMBR140T3 D5,6 UPP9401 Q801,802...
  • Page 42 MAXON SD-125 RF LINK MODULE MANUFACTURER'S BASE DIAGRAM REFERENCE NO. SCHEMATIC PART NUMBER HSMS2817 1.BASE 2.COLLECTOR KTA1663 3.EMITTER 1.EMITTER 2.BASE BFG35 Q502 3.EMITTER BLT50 4.COLLECTOR 1,4,5,8:EMITTER Q503 BLT52 2,3:BASE 6,7:COLLECTOR 1SV229 D201,202,301 1SV217 D801 KDS160 D802 MMBR140T3 D5,6 UPP9401 Q801,802...
  • Page 43 MAXON SD-125 RF LINK MODULE MANUFACTURER'S BASE DIAGRAM REFERENCE NO. IC'S PART NUMBER U401 CPU IC MC68HC705C8FB PLL IC MC14519IF U801 DC/DC Convertor LTC1435 U408 KIA7042P/F Voltage Regulator 1:VCC 2:GND 3:OUTPUT 4:GND U403 Comparator LM339 U404 Analoge SW IC MC14066...
  • Page 43 MAXON SD-125 RF LINK MODULE MANUFACTURER'S BASE DIAGRAM REFERENCE NO. IC'S PART NUMBER U401 CPU IC MC68HC705C8FB PLL IC MC14519IF U801 DC/DC Convertor LTC1435 U408 KIA7042P/F Voltage Regulator 1:VCC 2:GND 3:OUTPUT 4:GND U403 Comparator LM339 U404 Analoge SW IC MC14066...
  • Page 44 MAXON SD-125 RF LINK MODULE BASE DIAGRAM PIN DESCRIPTION No Description RF Power Amp Input Vcc (Pre Drive) Vcc Control (Drive) Vcc (Final) Output (U1) P.A. Assy. P/N: 650-230-0017 (U2) P.A. Assy. P/N: 650-230-0016 (V2) P.A. Assy. P/N: 650-230-0012 RX Front-End...
  • Page 44 MAXON SD-125 RF LINK MODULE BASE DIAGRAM PIN DESCRIPTION No Description RF Power Amp Input Vcc (Pre Drive) Vcc Control (Drive) Vcc (Final) Output (U1) P.A. Assy. P/N: 650-230-0017 (U2) P.A. Assy. P/N: 650-230-0016 (V2) P.A. Assy. P/N: 650-230-0012 RX Front-End...

  • Page 45: Wiring Diagram

    MAXON SD-125 RF LINK MODULE WIRING DIAGRAM Pin1..Audio In (Data RX) Pin2..Audio Out (Data TX) Pin3..PTT Pin4..GND (Ground) Pin5..B+ (8-18 Volts DC) Pin6.

  • Page 45: Wiring Diagram

    MAXON SD-125 RF LINK MODULE WIRING DIAGRAM Pin1..Audio In (Data RX) Pin2..Audio Out (Data TX) Pin3..PTT Pin4..GND (Ground) Pin5..B+ (8-18 Volts DC) Pin6.
  • Page 46 MAXON SD-125 RF LINK MODULE Intentionally Left Blank\ PAGE-42- October 98...
  • Page 46 MAXON SD-125 RF LINK MODULE Intentionally Left Blank\ PAGE-42- October 98...

  • Page 47: Schematics, Block Diagram & Pcb's

    DB9 CABLE U406B R454/C422 RV403 U407 AF LEVEL DEMPHASIS LM386 V0100040.CDR AUDIO AMP CorelDRAW 7.0 U405D U405C U406C 09-14-98 CPU AF MUTE U404C PREMPHSIS TITLE U404D SD-125 BLOCK DIAGRAM TX TONE DOCUMENT SIZE 060-010-0040 NUMBER U404B SCALE SHEET PAGE-43- October 98...

  • Page 47: Schematics, Block Diagram & Pcb's

    DB9 CABLE U406B R454/C422 RV403 U407 AF LEVEL DEMPHASIS LM386 V0100040.CDR AUDIO AMP CorelDRAW 7.0 U405D U405C U406C 09-14-98 CPU AF MUTE U404C PREMPHSIS TITLE U404D SD-125 BLOCK DIAGRAM TX TONE DOCUMENT SIZE 060-010-0040 NUMBER U404B SCALE SHEET PAGE-43- October 98...

  • Page 48: Digital Board Schematic

    REVISIONS DESCRIPTION DESCRIPTION RELEASED TO MANUFACTURING 10/98 770-010-0029.PLT AutoCAD R13c4 10-20-98 TITLE SD-125 DIGITAL SCHEMATIC DIAGRAM DOCUMENT SIZE 770-010-0029 NUMBER SCALE SHEET PAGE-44- October 98...

  • Page 48: Digital Board Schematic

    REVISIONS DESCRIPTION DESCRIPTION RELEASED TO MANUFACTURING 10/98 770-010-0029.PLT AutoCAD R13c4 10-20-98 TITLE SD-125 DIGITAL SCHEMATIC DIAGRAM DOCUMENT SIZE 770-010-0029 NUMBER SCALE SHEET PAGE-44- October 98...

  • Page 49: Rf Board (148-174Mhz) Schematic

    REVISIONS DESCRIPTION DESCRIPTION RELEASED TO MANUFACTURING 10/98 770-020-0029.PLT AutoCAD R13c4 10-20-98 TITLE SD-125 RF SCHEMATIC DIAGRAM (V2 148-174MHz) DOCUMENT SIZE 770-020-0029 NUMBER SCALE SHEET PAGE-45- October 98...

  • Page 49: Rf Board (148-174Mhz) Schematic

    REVISIONS DESCRIPTION DESCRIPTION RELEASED TO MANUFACTURING 10/98 770-020-0029.PLT AutoCAD R13c4 10-20-98 TITLE SD-125 RF SCHEMATIC DIAGRAM (V2 148-174MHz) DOCUMENT SIZE 770-020-0029 NUMBER SCALE SHEET PAGE-45- October 98...

  • Page 50: Rf Board (400-430Mhz) Schematic

    REVISIONS DESCRIPTION DESCRIPTION RELEASED TO MANUFACTURING 10/98 770-020-0027.PLT AutoCAD R13c4 10-20-98 TITLE SD-125 RF SCHEMATIC DIAGRAM (U1 400-430MHz) DOCUMENT SIZE 770-020-0027 NUMBER SCALE SHEET PAGE-46- October 98...

  • Page 50: Rf Board (400-430Mhz) Schematic

    REVISIONS DESCRIPTION DESCRIPTION RELEASED TO MANUFACTURING 10/98 770-020-0027.PLT AutoCAD R13c4 10-20-98 TITLE SD-125 RF SCHEMATIC DIAGRAM (U1 400-430MHz) DOCUMENT SIZE 770-020-0027 NUMBER SCALE SHEET PAGE-46- October 98...

  • Page 51: Rf Board (440-470Mhz) Schematic

    REVISIONS DESCRIPTION DESCRIPTION RELEASED TO MANUFACTURING 10/98 770-020-0026.PLT AutoCAD R13c4 10-20-98 TITLE SD-125 RF SCHEMATIC DIAGRAM (U2 440-470MHz) DOCUMENT SIZE 770-020-0026 NUMBER SCALE SHEET PAGE-47- October 98...

  • Page 51: Rf Board (440-470Mhz) Schematic

    REVISIONS DESCRIPTION DESCRIPTION RELEASED TO MANUFACTURING 10/98 770-020-0026.PLT AutoCAD R13c4 10-20-98 TITLE SD-125 RF SCHEMATIC DIAGRAM (U2 440-470MHz) DOCUMENT SIZE 770-020-0026 NUMBER SCALE SHEET PAGE-47- October 98...

  • Page 52: Tcxo Schematic

    L205 VCO TX C212 R205 180nH 0.001 2.2K C217 Q203 2SC5084 STREENG C213 4.7P R204 2.2K R206 Q202 C208 C202 2SC5084 L201 4.7P 1.2uH C214 C205 R202 1.2P 100K C216 0.001 L204 C203 D202 2.2UH 1.2P R706 1SV217 TH703 TH701 150K R710 R713...

  • Page 52: Tcxo Schematic

    L205 VCO TX C212 R205 180nH 0.001 2.2K C217 Q203 2SC5084 STREENG C213 4.7P R204 2.2K R206 Q202 C208 C202 2SC5084 L201 4.7P 1.2uH C214 C205 R202 1.2P 100K C216 0.001 L204 C203 D202 2.2UH 1.2P R706 1SV217 TH703 TH701 150K R710 R713...
  • Page 53 L205 L205 C212 C212 VCO TX VCO TX R205 R205 33nH 220P 220P 33nH 2.2K 2.2K C217 C217 Q203 Q203 2SC5084 2SC5084 STREENG STREENG (MCO) (MCO) C213 C213 R204 R204 2.2K 2.2K R206 R206 (MCO) (MCO) Q202 Q202 C208 C208 C202 C202 L201...
  • Page 53 L205 L205 C212 C212 VCO TX VCO TX R205 R205 33nH 220P 220P 33nH 2.2K 2.2K C217 C217 Q203 Q203 2SC5084 2SC5084 STREENG STREENG (MCO) (MCO) C213 C213 R204 R204 2.2K 2.2K R206 R206 (MCO) (MCO) Q202 Q202 C208 C208 C202 C202 L201...
  • Page 54 4 4 4 RX 5V C605 C608 0.001 33pF R601 R602 R601 6.8K C616 C615 C613 C608 C606 C605 C603 C602 C621 C619 C618 C610 R602 C601 C603 L601 680pF 56pF R603 C613 C616 C617 L607 Q601 C611 L604 39pF L604 Q601 L602...
  • Page 54 4 4 4 RX 5V C605 C608 0.001 33pF R601 R602 R601 6.8K C616 C615 C613 C608 C606 C605 C603 C602 C621 C619 C618 C610 R602 C601 C603 L601 680pF 56pF R603 C613 C616 C617 L607 Q601 C611 L604 39pF L604 Q601 L602...
  • Page 55 R501 R505 2.7K L504 Q502 1.2UH Q501 Q503 MMBR951 C502 BLT50 C505 BLT52 C515 R501 R505 C501 2.7K L506 2.2uH C515 Q501 Q502 MMBR951 BLT50 C505 0.01 C502 L502 L505 C501 L507 L508 27NH L502 1.2UH L509 L503 Q503 L505 R509 150NH BLT52...
  • Page 55 R501 R505 2.7K L504 Q502 1.2UH Q501 Q503 MMBR951 C502 BLT50 C505 BLT52 C515 R501 R505 C501 2.7K L506 2.2uH C515 Q501 Q502 MMBR951 BLT50 C505 0.01 C502 L502 L505 C501 L507 L508 27NH L502 1.2UH L509 L503 Q503 L505 R509 150NH BLT52...
  • Page 56 U408 CON403 416078A Digital Board Assembly 416078A Digital Board Assembly 416078A 650-010-0029 650-010-0029 PAGE-52- October 98...
  • Page 56 U408 CON403 416078A Digital Board Assembly 416078A Digital Board Assembly 416078A 650-010-0029 650-010-0029 PAGE-52- October 98...
  • Page 57 C 7 2 FRONT-END T.C.X.O. V.C.O. RF Board Assembly 416074A Rev. 06 RF Board Assembly 416074A Rev. 06 148-174MHz 148-174MHz 650-020-0029 650-020-0029 PAGE-53- October 98...
  • Page 57 C 7 2 FRONT-END T.C.X.O. V.C.O. RF Board Assembly 416074A Rev. 06 RF Board Assembly 416074A Rev. 06 148-174MHz 148-174MHz 650-020-0029 650-020-0029 PAGE-53- October 98...
  • Page 58 FRONT END T.C.X.O. V.C.O. RF Board Assembly 416074A Rev. 06 RF Board Assembly 416074A Rev. 06 650-020-0027 (400-430MHz) 650-020-0027 (400-430MHz) 650-020-0026 (440-470MHz) 650-020-0026 (440-470MHz) PAGE-54- October 98...
  • Page 58 FRONT END T.C.X.O. V.C.O. RF Board Assembly 416074A Rev. 06 RF Board Assembly 416074A Rev. 06 650-020-0027 (400-430MHz) 650-020-0027 (400-430MHz) 650-020-0026 (440-470MHz) 650-020-0026 (440-470MHz) PAGE-54- October 98...
  • Page 59 PAGE-55- October 98...
  • Page 59 PAGE-55- October 98...

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Sd-125 u1Sd-125 u2Sd-125 v2

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