Vertex Standard VX-131 Service Manual
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Vertex Standard VX-131 Service Manual

Uhf fm business two-way radio
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FM Business Two-Way Radio
VX-131/-132
UHF Model
Service Manual
©2004 VERTEX STANDARD CO., LTD.
Introduction
This manual provides technical information necessary for servicing the VX-131 and VX-132 UHF FM Transceiver.
Servicing this equipment requires expertise in handling surface-mount chip components. Attempts by non-qualified
persons to service this equipment may result in permanent damage not covered by the warranty, and may be illegal in
some countries.
Two PCB layout diagrams are provided for each double-sided circuit board in the transceiver. Each side of is referred to
by the type of the majority of components installed on that side ("leaded" or "chip-only"). In most cases one side has only
chip components, and the other has either a mixture of both chip and leaded components (trimmers, coils, electrolytic
capacitors, ICs, etc.), or leaded components only.
While we believe the technical information in this manual to be correct, VERTEX STANDARD assumes no liability for
damage that may occur as a result of typographical or other errors that may be present. Your cooperation in pointing out
any inconsistencies in the technical information would be appreciated.
Specifications................................................... 2
Programming the Channel Data .................. 4
Cloning ............................................................. 6
Block Diagram ................................................. 7
EC059U90A
VX-131
VERTEX STANDARD CO., LTD.
4-8-8 Nakameguro, Meguro-Ku, Tokyo 153-8644, Japan
VERTEX STANDARD
US Headquarters
10900 Walker Street, Cypress, CA 90630, U.S.A.
YAESU EUROPE B.V.
P.O. Box 75525, 1118 ZN Schiphol, The Netherlands
YAESU UK LTD.
Unit 12, Sun Valley Business Park, Winnall Close
Winchester, Hampshire, SO23 0LB, U.K.
VERTEX STANDARD HK LTD.
Unit 5, 20/F., Seaview Centre, 139-141 Hoi Bun Road,
Kwun Tong, Kowloon, Hong Kong
VX-132
Circuit Description ................................. 9
Alignment ............................................... 13
Circuit Diagram ....................................................... 21
Parts Layout ............................................................. 23
Parts List ................................................................... 25
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Summary of Contents for Vertex Standard VX-131

  • Page 1: Table Of Contents

    ICs, etc.), or leaded components only. While we believe the technical information in this manual to be correct, VERTEX STANDARD assumes no liability for damage that may occur as a result of typographical or other errors that may be present. Your cooperation in pointing out any inconsistencies in the technical information would be appreciated.

  • Page 2: Specifications

    Specifications General Frequency Range: 450 - 470 MHz Number of Channels: 1 channel (VX-131), 2 channles (VX-132) Channel Spacing: 12.5 / 25 kHz Power Supply Voltage: 7.5 VDC ± 10% Operating Temperature Range: –22 °F to +140 °F (–30 °C to +60 °C) Frequency Stability: ±2.5 ppm...

  • Page 3: Exploded View & Miscellaneous Parts

    Exploded View & Miscellaneous Parts RA0631200 RA0631300 FRONT CASE ASSY (VX-132) FRONT CASE ASSY (VX-131) RA0173500 (w/PTT KNOB) (w/PTT KNOB)   R6147510 RING NUT RA0294200 RA029430A RA0294200 PTT KNOB RUBBER PACKING PTT KNOB RA0110200 HOLDER RUBBER RA0296100 Œ VOLUME KNOB...

  • Page 4: Programming The Channel Data

    Programming the Channel Data The VX-131/-132 transceiver allows you to change the channel frequency and its CTCSS/DCS status. Also, you may select the channel bandwidth (wide/narrow) of all VHF frequencies and some UHF frequencies (see the channel table). If the channel programming process fails, the radio...
  • Page 5 You may check the CTCSS/DCS/ARTS status by press- ing and holding in the MONITOR button. The radio will respond with the CTCSS/DCS confirmation beeps according to the chart at the beginning of this section. VX-131 D VX-132 D EFALUT ETTING...

  • Page 6: Cloning

    The VX-131/-132 series includes a convenient “Cloning” feature, which allows the programming data from one transceiv- er to be transferred to another VX-131/-132 series. Here is the procedure for cloning one radio’s data to another. 1. Turn both transceiver off.

  • Page 7: Block Diagram

    Block Diagram...
  • Page 8 Block Diagram...

  • Page 9: Circuit Description

    Circuit Description Receive Signal Path Squelch Control Incoming RF signal from the antenna jack is delivered to The squelch circuitry consists of a noise amplifier and the MAIN Unit and passes through a low-pass filter con- band-pass filter within Q1041 (TA31136FN) and noise sisting of coils L1003, L1005, and L1007, capacitors C1014, detector D1026 (1SS355).
  • Page 10 Circuit Description The transmit signal then passes through the antenna switch PLL Frequency Synthesizer D1005 (RLS135) and is low-pass filtered to suppress har- The PLL circuitry on the Main Unit consists of VCO Q1004 monic spurious radiation before delivery to the antenna. (2SK508), VCO buffer Q1008 (2SC5005), and PLL IC Q1005 (MB15A02PFV1) which contains a reference divid- CTCSS/DCS Signal Path...
  • Page 11 Circuit Description Receive and transmit buses select which VCO is made active by Q1001 (RT1N441U). TCXO unit X1001 yields frequency stability of ±2.5 ppm @ –30 °C to +60 °C. Push-To-Talk Transmit Activation The PTT switch S1002 is connected to pin 48 of micropro- cessor Q1013 (M37516F8HP), so that when the PTT switch is closed, pin 23 of Q1013 (M37516F8HP) goes low.
  • Page 12 Circuit Description Note...

  • Page 13: Alignment

    Alignment Introduction Required Test Equipment The VX-131/-132 has been aligned at the factory for the Radio Tester with calibrated output level at 1GHz specified performance across the entire frequency range In-line Wattmeter with 5 % accuracy at 1 GHz specified. Realignment should therefore not be necessary 50-ohm, 10-W RF Dummy Load except in the event of a component failure.
  • Page 14 Alignment Set up the test equipment Menu of the Tool Set up the test equipment as shown below for transceiver RF Frequency alignment, and apply 7.5V DC power to the transceiver. Set the transceiver to “CH 3 (469.9950 MHz)“ via the “...
  • Page 15 Alignment Transmitter Output Power MAX Deviation Set the transceiver to “CH 3 (469.9950 MHz)“ via the Set the transceiver to “CH 3 (469.9950 MHz)“ via the “ ” box. “ ” box. Double click the left mouse button on the “ RF Power Inject a 1 kHz tone at –17 dBm to the MIC jack.
  • Page 16 Alignment MIC Sensitivity CTCSS VCO Modulation Set the transceiver to “CH 3 (469.9950 MHz)“ via the Set the transceiver to “CH 3 (469.9950 MHz)“ via the “ ” box. “ ” box. Inject a 1 kHz tone at –37 dBm to the MIC jack. Activate the CTCSS encoder with “254.1 Hz“...
  • Page 17 Alignment CTCSS Ref. Modulation DCS Deviation Set the transceiver to “CH 3 (469.9950 MHz)“ via the Set the transceiver to “CH 3 (469.9950 MHz)“ via the “ ” box. “ ” box. Activate the CTCSS encoder with “67.0 Hz“ Tone via Activate the DCS encoder with “627“...
  • Page 18 Alignment RX Sensitivity Threshold NSQ Level (Wide) Set the transceiver to “CH 3 (469.995 MHz)“ via the Set the transceiver to “CH 3 (469.995 MHz/Wide)“ via “ ” box. the “ ” box. Injust a 469.995 MHz siganl at a level of 40dBµ with Injust a 469.995 MHz siganl at a level of –11 dBµ...
  • Page 19 Alignment Threshold NSQ Level (Narrow) Set the transceiver to “CH 6 (469.995 MHz/Narrow)“ via the “ ” box. Injust a 469.995 MHz siganl at a level of –11 dBµ with ±1.5 kHz deviation with a 1 kHz to the Antenna Jack. Double click the left mouse button on the “...
  • Page 20 Alignment Note...

  • Page 21: Main Unit

    MAIN Unit Circuit Diagram 0.8 V 2.6 V 4.8 V 5.0 V 0.3 V 0.7 V 1.9 V 2.6 V TX (2 W): 1.8 V RX: 0 V RX: 2.3 V 3.6 V TX: 4.0 V TX (2 W): 1.6 V RX: 0 V 0.8 V TX: 0 V...
  • Page 22 MAIN Unit Note...

  • Page 23: Parts Layout

    MAIN Unit Parts Layout (Side A) LM2902PWR NJM2070M 2SA1586Y (SY) CPH6102 (AB) IMZ2 (Z2) RT1N441U (N3) 12-22SURSYGC/S530-A2/TR8 (Q1017, 1030) (Q1037) (Q1011, 1040, (Q1033) (Q1028) (Q1039) (D1021) 1043) NJM12903R 2SC4154E (LE) FMW1 (W1) RD07MVS1 RT1P441U (P3) MC2850 (A7) (Q1025) (Q1024, 1031) (Q1034) (Q1023) (Q1035)
  • Page 24 MAIN Unit Parts Layout (Side B) M37516F8HP MB15A02PFV1 2SK508 (K52) 2SA1586Y (SY) 2SC4154E (LE) CPH6102 (AB) FMW1 (W1) RT1N441U (N3) RD01MUS1 DAN235E (M) (Q1013) (Q1005) (Q1004) (Q1007) (Q1003, 1006) (Q1022, 1027) (Q1020, 1026) (Q1001, 1010, (Q1018) (D1010) 1019) TA31136FN 2SC4215Y (QY) (Q1041) (Q1036) 2SC5005 (73)

  • Page 25: Parts List

    MAIN Unit Parts List DESCRIPTION VALUE TOL. MFR'S DESIG VXSTD P/N VERS. LOT SIDE LAY ADR PCB with Components CB2916001 1 CH CB2916002 2 CH Printed Circuit Board AC059U000 FR0120900 C 1001 CHIP CAP. 0.001uF GRM39B102K50PT K22174821 C 1002 CHIP CAP. 2.2uF ECJ2FB1A225K K22100807...
  • Page 26 MAIN Unit Parts List DESCRIPTION VALUE TOL. MFR'S DESIG VXSTD P/N VERS. LOT SIDE LAY ADR C 1079 CHIP CAP. 0.001uF GRM39B102K50PT K22174821 C 1080 CHIP CAP. GRM39CJ030C50PT K22174204 C 1081 CHIP CAP. GRM39CH040C50PT K22174205 C 1082 CHIP CAP. GRM39CH080D50PT K22174209 C 1083 CHIP CAP.
  • Page 27 MAIN Unit Parts List DESCRIPTION VALUE TOL. MFR'S DESIG VXSTD P/N VERS. LOT SIDE LAY ADR C 1172 CHIP CAP. 0.047uF GRM39B473K16PT K22124804 C 1173 CHIP CAP. 0.1uF GRM39B104K16PT K22124805 C 1174 CHIP CAP. 0.047uF GRM39B473K16PT K22124804 C 1175 AL.ELECTRO.CAP. 220uF SMG1AVB221M 220UF K40109027...
  • Page 28 G3070223 Q 1023 RD07MVS1-T12 G3070320 Q 1024 TRANSISTOR 2SC4154-T11-1E G3341548E Q 1025 NJM12903R(TE1) G1093336 Q 1026 TRANSISTOR FMW1 T98 G3070009 Q 1027 TRANSISTOR CPH6102-TL G3070223 Q 1028 TRANSISTOR IMZ2A T108 G3070060 Q 1029 3SK320(TE85L) G4803208 : Please contact Vertex Standard...
  • Page 29 MAIN Unit Parts List DESCRIPTION VALUE TOL. MFR'S DESIG VXSTD P/N VERS. LOT SIDE LAY ADR Q 1030 LM2902PWR G1094009 Q 1031 TRANSISTOR 2SC4154-T11-1E G3341548E Q 1032 S-80835CNMC-B8U-T2 G1093606 Q 1033 TRANSISTOR CPH6102-TL G3070223 Q 1034 TRANSISTOR FMW1 T98 G3070009 Q 1035 TRANSISTOR RT1P441U-T11-1...
  • Page 30 MAIN Unit Parts List DESCRIPTION VALUE TOL. MFR'S DESIG VXSTD P/N VERS. LOT SIDE LAY ADR R 1067 CHIP RES. 330k 1/16W RMC1/16 334FTP J24183334 R 1068 CHIP RES. 1/16W RMC1/16 103JATP J24185103 R 1069 CHIP RES. 1/16W RMC1/16 823FTP J24183823 R 1070 CHIP RES.
  • Page 31 MAIN Unit Parts List DESCRIPTION VALUE TOL. MFR'S DESIG VXSTD P/N VERS. LOT SIDE LAY ADR R 1147 CHIP RES. 1/10W RMC1/10T 680J J24205680 R 1148 CHIP RES. 1/16W RMC1/16 101JATP J24185101 R 1149 CHIP RES. 1/10W RMC1/10T 680J J24205680 R 1150 CHIP RES.
  • Page 32 MAIN Unit Parts List DESCRIPTION VALUE TOL. MFR'S DESIG VXSTD P/N VERS. LOT SIDE LAY ADR R 1230 CHIP RES. 1/16W RMC1/16 103JATP J24185103 R 1231 CHIP RES. 1/16W RMC1/16 102JATP J24185102 R 1232 CHIP RES. 100k 1/16W RMC1/16 104JATP J24185104 R 1233 CHIP RES.
  • Page 34 Copyright 2002 VERTEX STANDARD CO., LTD. All rights reserved No portion of this manual may be reproduced without the permission of VERTEX STANDARD CO., LTD. Printed in Japan.

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Vx-132

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