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Yaesu VX-120 Technical Supplement

Vhf fm transceiver
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Download this manual See also: Operating Manual
VX-120/-170
Technical Supplement
©
2005 VERTEX STANDARD CO., LTD.
Introduction
This manual provides the technical information necessary for servicing the VX-120/-170 VHF FM Transceiver.
Servicing this equipment requires expertise in handing 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 board in this transceiver. Each side of the board is
referred to by the type of the majority of components installed on that side ("Side A" or "Side B"). In most cases one
side has only chip components (surface-mount devices), 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 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
Exploded View & Miscellaneous Parts .......................................................................................................................3
Block Diagram ..................................................................................................................................................................5
Circuit Description .......................................................................................................................................................... 7
Alignment ..........................................................................................................................................................................9
Board Units (Schematics, Layouts & Parts)
Main Unit ................................................................................................................................................................... 13
FTD-7 DTMF Paging Unit (Option) ....................................................................................................................... 29
EH022N90A
VX-120
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-170

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Summary of Contents for Yaesu VX-120

  • Page 1: Table Of Contents

    4-8-8 Nakameguro, Meguro-Ku, Tokyo 153-8644, Japan VERTEX STANDARD US Headquarters 10900 Walker Street, Cypress, CA 90630, U.S.A. VX-120/-170 YAESU EUROPE B.V. P.O. Box 75525, 1118 ZN Schiphol, The Netherlands YAESU UK LTD. Unit 12, Sun Valley Business Park, Winnall Close Technical Supplement Winchester, Hampshire, SO23 0LB, U.K.

  • Page 2: Specifications

    Specifications General Frequency Ranges: 137 - 174 MHz 144 - 146 (148) MHz Channel Steps: 5/10/12.5/15/20/25/50/100 kHz Frequency Stability: ±5 ppm @ 14° to 140° F (–10° to +60° C) Repeater Shift: ±600 kHz Emission Type: F2 , F3 50 Ω Antenna Impedance: Supply Voltage: Nominal:...

  • Page 3: Exploded View & Miscellaneous Parts

    Exploded View & Miscellaneous Parts RA0701100 VX-170 RA0304300 WINDOW (VX-170) WASHER RA0576900 DOUBLE FACE RA0577600  EXT CAP RA0709200 PANEL ASSY (VX-170) RA057840A RING NUT RA0701000 PANEL (VX-170) RA0478500 SPECIAL NUT ASSY RA0577100 HOLDER RA0467600 RA057700A O RING RUBBER KNOB RA0577800 RA0434100 KNOB...
  • Page 4 Exploded View & Miscellaneous Parts Note...

  • Page 5: Block Diagram

    Block Diagram...
  • Page 6 Block Diagram...

  • Page 7: Circuit Description

    Circuit Description Receive Signal Path Transmit Signal Path Incoming RF signal is from the antenna jack is delivered The speech signal from the microphone is amplified by to the Main Unit and passed through the low-pass filter Q1074 (LM2902PWR). The amplified speech signal is sub- network, antenna switching diode D1003 and D1004 (both jected to the low-pass filter network Q1074 (LM2902PWR) RLS135), and low-pass filter network to the RF amplifier...
  • Page 8 Circuit Description erence frequencies, which are utilized by the phase com- parator. The phase comparator section of Q1003 (MB15A01PFV1) compares the phase between the frequency-divided os- cillation frequency of the VCO circuit and comparative frequency and its output is a pulse corresponding to the phase difference.

  • Page 9: Alignment

    Alignment Introduction Required Test Equipment The VX-120/-170 is carefully aligned at the factory for the The following test equipment (and familiarity with its use) specified performance across the amateur band. Realign- is necessary for complete realignment. Correction of prob- ment should therefore not be necessary except in the event lems caused by misalignment resulting from use of im- of a component failure.

  • Page 10: Test Setup

    Alignment Test Setup Entering the Alignment Mode Set up the test equipment as shown below for transceiver Alignment of the VX-120/-170 is performed using a front alignment. panel software-based procedure. To perform alignment of the transceiver, it must first be placed in the “Align- Inline AF Signal RF Sampling...
  • Page 11 Alignment RF Front-end Tuning TX Power Output 1. Connect the DC voltmeter to TP1031 on the MAIN 1. Tune the frequency to 146.050 MHz, then set the trans- unit, then inject a 145.050 MHz signal at a level of +10 mit power level to “LOW.”...
  • Page 12 Alignment CTCSS TX Deviation Squelch Sensitivity 1. Tune the frequency to 146.050 MHz, then activate the 1. Tune the frequency to 146.050 MHz. CTCSS encoder with a “100 Hz” tone, and set the trans- 2. Inject a 146.050 MHz signal at a level of –12 dBµV (with mit power level to “LOW.”...

  • Page 13: Main Unit

    MAIN Unit Circuit Diagram TX "H": 8.10 V TX "M": 8.14 V TX "L": 8.17 V TX: 3.93 V 4.32 V TX "H": 3.04 V TX "M": 1.64 V 1.78 V TX: +18.3 dBm @146.00 MHz TX "L": 0.59 V 1.29 V TX: +6.3 dBm 1.13 V...
  • Page 14 MAIN Unit...
  • Page 15 MAIN Unit Parts Layout (Side A) HD64F2266 (Q1001) BR24L64F (Q1002) LM2904PWR (Q1019) TDA28822 (Q1008) 2SK3476 (Q1009) 2SB1201S (Q1037) 2SA1774 (FR) 2SB1132 (BA) 2SC4617 (BR) 2SD1664 (DA) DTA144EE (16) DTC144EE (26) BD4845FVE DA221 (K) 1SS321 (F9) (Q1030, 1031, 1032, (Q1063, 1078) (Q1034, 1038, 1039, (Q1067) (Q1033, 1043, 1058,...
  • Page 16 MAIN Unit Parts Layout (Side B) LM2904PWR MB15A01PFV1 2SA1774 (FR) 2SC4617 (BR) 2SJ364 (4M) 3SK296ZQ (ZQ) DTA144EE (16) DTC144EE (26) NJU7231F30 XC6202P DA221 (K) (Q1050, 1083) (Q1003) (Q1018, 1036) (Q1028, 1052, 1055, (Q1056) (Q1022, 1023) (Q1027, 1054, 1084) (Q1015, 1016, 1025, (Q1007) (Q1080) (D1012, 1030)
  • Page 17 MAIN Unit Parts List DESCRIPTION VALUE TOL. MFR'S DESIG VXSTD P/N VERS. LOT SIDE LAY ADR PCB with Components CS1841001 VX-170 USA A2 CS1841002 VX-120 USA A2 CS1841003 VX-120 EXP A1 CS1841004 VX-120 EXP A2 CS1841005 VX-120 EXP A3 CS1841006 VX-120 EXP B1 CS1841007 VX-120 EXP B2...

  • Page 18: Parts List

    MAIN Unit Parts List DESCRIPTION VALUE TOL. MFR'S DESIG VXSTD P/N VERS. LOT SIDE LAY ADR C 1064 CHIP TA.CAP. 0.1uF SKF-1D104M-RP K78130049 C 1065 CHIP TA.CAP. 0.1uF SKF-1D104M-RP K78130049 C 1066 CHIP TA.CAP. 4.7uF TEMSVA1C475M-8R K78120031 C 1067 CHIP TA.CAP. 0.1uF SKF-1D104M-RP K78130049...
  • Page 19 MAIN Unit Parts List DESCRIPTION VALUE TOL. MFR'S DESIG VXSTD P/N VERS. LOT SIDE LAY ADR C 1144 CHIP CAP. 0.1uF GRM36B104K10PT K22108802 C 1145 CHIP CAP. 470pF GRM155B11H471KA01D K22178805 C 1146 CHIP CAP. 470pF GRM155B11H471KA01D K22178805 C 1147 CHIP CAP. 220pF GRM155B11H221KA01D K22178801...
  • Page 20 MAIN Unit Parts List DESCRIPTION VALUE TOL. MFR'S DESIG VXSTD P/N VERS. LOT SIDE LAY ADR C 1217 CHIP CAP. 0.022uF GRM36B223K16PT K22128806 C 1218 CHIP CAP. 0.0068uF GRM36B682K25PT K22148803 C 1219 CHIP CAP. 330pF GRM155B11H331KA01D K22178803 C 1220 CHIP CAP. 680pF GRM155B11H681KA01D K22178807...
  • Page 21 MAIN Unit Parts List DESCRIPTION VALUE TOL. MFR'S DESIG VXSTD P/N VERS. LOT SIDE LAY ADR D 1007 DIODE 1SS400 TE61 G2070634 D 1008 DIODE 1SS400 TE61 G2070634 D 1009 DIODE HVC365 TRF G2070902 D 1010 DIODE HVC365 TRF G2070902 D 1011 DIODE HSC277TRF...
  • Page 22 MAIN Unit Parts List DESCRIPTION VALUE TOL. MFR'S DESIG VXSTD P/N VERS. LOT SIDE LAY ADR L 1007 COIL E2 0.45-1.4-4T-L L0022391 L 1008 COIL E2 0.25-1.9-8.5T-L L0022611 L 1009 COIL E2 0.28-1.0-4.5T-R L0022395 L 1010 COIL E2 0.28-1.0-8TR L0022423 L 1011 M.RFC 0.047uH...
  • Page 23 MAIN Unit Parts List DESCRIPTION VALUE TOL. MFR'S DESIG VXSTD P/N VERS. LOT SIDE LAY ADR Q 1047 TRANSISTOR DTC144EE TL G3070075 Q 1048 TRANSISTOR DTC144EE TL G3070075 Q 1049 TRANSISTOR DTC144EE TL G3070075 Q 1050 LM2904PWR G1094010 Q 1051 TRANSISTOR DTC144EE TL G3070075...
  • Page 24 MAIN Unit Parts List DESCRIPTION VALUE TOL. MFR'S DESIG VXSTD P/N VERS. LOT SIDE LAY ADR R 1039 CHIP RES. 1/16W RMC1/16S 473JTH J24189045 R 1040 CHIP RES. 1/16W RMC1/16S 151JTH J24189015 R 1041 CHIP RES. 1/16W RMC1/16S 101JTH J24189013 R 1042 CHIP RES.
  • Page 25 MAIN Unit Parts List DESCRIPTION VALUE TOL. MFR'S DESIG VXSTD P/N VERS. LOT SIDE LAY ADR R 1111 CHIP RES. 1/16W RMC1/16S 153JTH J24189039 R 1112 CHIP RES. 1/16W RMC1/16S 102JTH J24189025 R 1113 CHIP RES. 1/16W RMC1/16S 103JTH J24189037 R 1114 CHIP RES.
  • Page 26 MAIN Unit Parts List DESCRIPTION VALUE TOL. MFR'S DESIG VXSTD P/N VERS. LOT SIDE LAY ADR R 1187 CHIP RES. 2.2k 1/16W RMC1/16S 222JTH J24189029 R 1188 CHIP RES. 1/16W 0.5% RR0510P-103-D J24189143 R 1189 CHIP RES. 4.7k 1/16W 0.5% RR0510P-472-D J24189135 R 1190...
  • Page 27 MAIN Unit Parts List DESCRIPTION VALUE TOL. MFR'S DESIG VXSTD P/N VERS. LOT SIDE LAY ADR R 1261 CHIP RES. 1/16W RMC1/16S 103JTH J24189037 R 1262 CHIP RES. 120k 1/16W RMC1/16S 124JTH J24189050 R 1263 CHIP RES. 1/16W RMC1/16S 103JTH J24189037 R 1264 CHIP RES.
  • Page 28 MAIN Unit Parts List DESCRIPTION VALUE TOL. MFR'S DESIG VXSTD P/N VERS. LOT SIDE LAY ADR R 1335 CHIP RES. 1/16W RMC1/16S 102JTH J24189025 R 1336 CHIP RES. 1/16W RMC1/16S 102JTH J24189025 R 1337 CHIP RES. 1/16W RMC1/16S 102JTH J24189025 R 1338 CHIP RES.

  • Page 29: Ftd-7 Dtmf Paging Unit (Option)

    FTD-7 DTMF Paging Unit (Option) Circuit Diagram Parts Layout (Side A) (Side B) BU8872FS 2SC4617 (BR) (Q6001) (6003) DTA144EE (16) DTC144EE (26) (Q6002, 6005) (Q6004)
  • Page 30 FTD-7 DTMF Paging Unit (Option) Parts List DESCRIPTION VALUE TOL. MFR'S DESIG VXSTD P/N VERS. LOT SIDE LAY ADR Printed Circuit Board AAE33X000 FR0133600 C 6001 CHIP CAP. 0.022uF GRM36B223K16PT K22128806 C 6002 CHIP CAP. 0.033uF GRM36B333K10PT K22108803 C 6003 CHIP CAP.
  • Page 32 Copyright 2005 VERTEX STANDARD CO., LTD. All rights reserved No portion of this manual may be reproduced without the permission of VERTEX STANDARD CO., LTD.

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Vx-170Vx120

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