Vertex VX-920 Series Service Manual
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Vertex VX-920 Series Service Manual

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VX-920/-920E Series
VHF Band
Service Manual
©2011 VERTEX STANDARD CO., LTD.
After Lot.13 of this transceiver was assembled using Pb (lead) free solder, based on the RoHS specification.
Only lead-free solder (Alloy Composition: Sn-3.0Ag-0.5Cu) should be used for repairs performed on this apparatus.
The solder stated above utilizes the alloy composition required for compliance with the lead-free specification, and
any solder with the above alloy composition may be used.
Specifications ...................................................................................................................................................... 2
Exploded View & Miscellaneous Parts .......................................................................................................... 3
Block Diagram .................................................................................................................................................... 5
Circuit Description ............................................................................................................................................. 7
Alignment .......................................................................................................................................................... 11
Board Units (Schematics, Layouts & Parts)
Main Unit .................................................................................................................................................... 15
Display Unit ............................................................................................................................................... 43
Cable Unit .................................................................................................................................................. 53
SRX-3 Unit (Option) ................................................................................................................................. 55
VX-920/-920E VHF series Service Manual
EC033N90G
Introduction
This manual provides the technical information necessary for servicing the VX-920/-
920E Series Transceiver.
Servicing this equipment requires expertise in handing surface-mount chip compo-
nents. 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 coun-
tries.
Two PCB layout diagrams are provided for each double-sided board in this trans-
ceiver. 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.
As described in the pages to follow, the advanced microprocessor design of the VX-
920/-920E Series Transceiver allows a complete alignment of this transceiver to be
performed without opening the case of the radio; all adjustments can be performed
from the front panel, using the "Alignment Mode" menu.
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.
Important Note
VERTEX STANDARD CO., LTD.
4-8-8 Nakameguro, Meguro-Ku, Tokyo 153-8644, Japan
VERTEX STANDARD U.S.A. Inc.
6125 Phyllis Drive, Cypress, California 90630, U.S.A.
YAESU UK LTD.
Unit 12, Sun Valley Business Park, Winnall Close
Winchester, Hampshire, SO23 0LB, U.K.
VERTEX STANDARD HK LTD.
Unit 1306-1308, 13F., Millennium City 2, 378 Kwun Tong Road,
Kwun Tong, Kowloon, Hong Kong
VERTEX STANDARD ( AUSTRALIA ) PTY., LTD.
Tally Ho Business Park, 10 Wesley Court, East Burwood, VIC, 3151
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Summary of Contents for Vertex VX-920 Series

  • Page 1: Table Of Contents

    “Alignment Mode” menu. 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.

  • Page 2: Specifications

    Specifications General Frequency range: 134-174 MHz Channel / Group: 48 CH / 3 Groups (w/o LCD version) 512 CH / 32 Groups (w/ LCD version) Channel Spacing: 12.5/15/20/25/30 kHz PLL Stepping: 1.25/2.5/5/6.25/7.5 kHz Power Supply Voltage: 7.4 V Current Consumption: 30 mA (Standby w/saver) (Approx.

  • Page 3: Exploded View & Miscellaneous Parts

    Exploded View & Miscellaneous Parts RA060180A SIDE COVER CP8249003 (Waterproof:STD) CP8249006 (Waterproof:MIL 6ft/3h)  PANEL ASSY (16 KEY)  RA0745400 (x2 pcs) RA061150B COIL SPRING ROTARY KNOB (CH)  RA060170B RA0688700 ROTARY KNOB LATCH NAIL (VOL) RA0993500 LATCH PLATE  RA0662800 ...
  • Page 4 Exploded View & Miscellaneous Parts Note VX-920/-920E VHF series Service Manual...

  • Page 5: Block Diagram

    Block Diagram Main Unit VX-920/-920E VHF series Service Manual...
  • Page 6 Block Diagram Display Unit VX-920/-920E VHF series Service Manual...

  • Page 7: Circuit Description

    Circuit Description 1. Circuit Configuration by Frequency filter CF1001 (wide channels), CF1002 (narrow chan- The receiver is a double-conversion superhetero- nels) to strip away all but the desired signal, and is dyne type, with a first Intermediate Frequency (IF) applied to the limiter amplifier in Q1067 of 50.85 MHz and a second IF of 450 kHz.
  • Page 8 Circuit Description fier Q1071 (2SC4617), and noise detector D1047/ nal passes through the limiter and splatter filter of D1048 (both DA221). When a carrier is not being Q1032 (AK2345), and is adjusted for proper devia- received, the noise components passed from de- tion at Q1020 (M62364FP).
  • Page 9 Circuit Description tector Q1072 (NJM12902V) is compared with the ref- control voltage from PLL IC Q1070 (SA7025DK). The erence voltage and amplified by the power control negative voltage is fed to the varactor diode after amplifier Q1072 (NJM12902V). The output from c o n ve r s i o n t o a n e g a t i ve va l u e a t Q 1 0 3 1 Q1072 (NJM12902V) controls the gate bias of the fi- (NJM2130F), using the output voltage of the D/A...
  • Page 10 Circuit Description Note VX-920/-920E VHF series Service Manual...

  • Page 11: Alignment

    While most steps do not require all of the equip- sion type. All component replacement and service ment listed, the interactions of some adjustments should be performed only by an authorized Vertex may require that more complex adjustments be per- Standard representative, or the warranty policy may formed afterwards.
  • Page 12 Alignment Alignment Preparation & Precautions Setup the test equipment as shown for transceiver A 50-Ohm RF Dummy Load and in-line wattmeter alignment, apply 7.5 V DC power to the transceiv- must be connected to the main antenna jack in all er.
  • Page 13 Alignment The Alignment Tool Outline Basic Alignment Mode Installation the tool The Basic Alignment mode allows you to align the  Install the CE59 (version 2.06 or later) to your PC. entire radio. The value of each parameter can be ...
  • Page 14 Alignment CH (C ) Fine Alignment Mode HANNEL HANNEL The CH Fine Alignment Mode allows you to align the radio separately for every operating channel. The value of each parameter can be changed to the de- sired position using the “  ” / “  ” and up/down arrow keys, direct number input, and by dragging the PC mouse.

  • Page 15: Main Unit

    Main Unit Circuit Diagram RX MAIN: 0 V RX SUB: 2.7 V TX: –0.5 V 0.3 dBμV emf –9.0 dBμV emf @154.1 MHz RX: 2.6 V @154.1 MHz RX: 2.0 V RX: 4.8 V RX: 4.9 V TX: 0 V TX: 0 V RX: 1.4 V TX: 0 V...
  • Page 16 Main Unit Note VX-920/-920E VHF series Service Manual...
  • Page 17 Main Unit Parts Layout (Lot. 1-3) (Side A) M62364FP LA8630M BD6111FV 2SA1774 (FR) RTM002P02 (BA) DTC114TE (04) NJM2130F (BA) TC7S08FU (E2) UNR911FJ0L (6O) (Q1020) (Q1023) (Q1028) (Q1012, 1036) (Q1088) (Q1009, 1013, 1039, (Q1031) (Q1085) (Q1026) 1046, 1050, 1053, 1054, BR93L66RFVM 1057, 1059, 1064) (Q1065) LM2904PWR...
  • Page 18 Main Unit Parts Layout (Lot. 1-3) (Side B) AK2345 CD4066BPWR (Lot.1-2) SA7025DK 2SK508 (K52) 2SK3478 2SC3356 (R24) DTC114TE (04) UNR911FJ0L (6O) DA221 (K) (Q1032) (Q1078) (Q1070) (Q1047) (Q1021) (Q1027) (Q1040, 1048) (Q1045) (D1023, 1039, 1047, 1048) LM2902PWR 2SK880GR (XG) 2SC4227 (R32) (Q1073, 1074) (Q1068) (Q1052)
  • Page 19 Main Unit Circuit Diagram (Lot. 4-) VX-920/-920E VHF series Service Manual...
  • Page 20 Main Unit Note VX-920/-920E VHF series Service Manual...
  • Page 21 Main Unit Parts Layout (Lot. 4-) (Side A) M62364FP LA8630M BD6111FV 2SA1774 (FR) RTM002P02 (BA) DTC114TE (04) NJM2130F (BA) TC7S08FU (E2) UNR911FJ0L (6O) (Q1020) (Q1023) (Q1028) (Q1012, 1036) (Q1088) (Q1009, 1013, 1039, (Q1031) (Q1085) (Q1026) 1046, 1050, 1053, BR93L66RFVM 1054, 1057, 1059, (Q1065) 1064) LM2904PWR...
  • Page 22 Main Unit Parts Layout (Lot. 4-) (Side B) AK2345 LM2902PWR SA7025DK 2SK508 (K52) 2SK3478 2SC3356 (R24) DTC114TE (04) UNR911FJ0L (6O) DA221 (K) (Q1032) (Q1073, 1074) (Q1070) (Q1047) (Q1021) (Q1027) (Q1040, 1048) (Q1045) (D 1023, 1039, 1047, 1048) NJU4066BV 2SK880GR (XG) 2SC4227 (R32) (Q1078) (Q1068)
  • Page 23 Main Unit Parts List REF. DESCRIPTION VALUE TOL. MFR’S DESIG VXSTD P/N VERS. LOT. SIDE LAY ADR PCB with Components (CE:OFF, DST:VTX, KEY:OFF) CS1896001 NOT IS PCB with Components (CE:OFF, DST:VTX, KEY:4) CS1896002 NOT IS PCB with Components (CE:OFF, DST:VTX, KEY:16) CS1896003 NOT IS PCB with Components (CE:OFF, DST:EXP, KEY:OFF) CS1896004 NOT IS...
  • Page 24 Main Unit Parts List REF. DESCRIPTION VALUE TOL. MFR’S DESIG VXSTD P/N VERS. LOT. SIDE LAY ADR C 1046 CHIP CAP. 0.001uF GRM155B11H102KA01D K22178809 C 1047 CHIP CAP. 22pF GRM1882C1H220JA01D K22174219 C 1048 CHIP CAP. GRM1552C1H5R0CZ01D K22178207 C 1049 CHIP CAP. 0.01uF GRM36B103K16PT K22128804...
  • Page 25 Main Unit Parts List REF. DESCRIPTION VALUE TOL. MFR’S DESIG VXSTD P/N VERS. LOT. SIDE LAY ADR C 1099 CHIP CAP. 0.001uF GRM155B11H102KA01D K22178809 C 1100 CHIP CAP. 0.1uF GRM155B11A104KA01D K22108802 C 1101 CHIP CAP. 0.001uF GRM155B11H102KA01D K22178809 C 1104 CHIP CAP. 0.1uF GRM155B11A104KA01D K22108802...
  • Page 26 Main Unit Parts List REF. DESCRIPTION VALUE TOL. MFR’S DESIG VXSTD P/N VERS. LOT. SIDE LAY ADR C 1163 CHIP CAP. 6.3V GRM188B10J105KA01D K22084801 C 1164 CHIP CAP. 0.01uF GRM36B103K16PT K22128804 C 1164 CHIP CAP. 0.01uF GRM155B11E103KA01D K22148834 C 1165 CHIP CAP. 0.001uF GRM155B11H102KA01D K22178809...
  • Page 27 Main Unit Parts List REF. DESCRIPTION VALUE TOL. MFR’S DESIG VXSTD P/N VERS. LOT. SIDE LAY ADR C 1216 CHIP CAP. 0.01uF GRM36B103K16PT K22128804 C 1216 CHIP CAP. 0.01uF GRM155B11E103KA01D K22148834 C 1217 CHIP CAP. 0.001uF GRM155B11H102KA01D K22178809 C 1218 CHIP TA.CAP. TMCSA1C105MTR K78120023 C 1219 CHIP CAP.
  • Page 28 Main Unit Parts List REF. DESCRIPTION VALUE TOL. MFR’S DESIG VXSTD P/N VERS. LOT. SIDE LAY ADR C 1273 CHIP CAP. 0.01uF GRM155B11E103KA01D K22148834 C 1274 CHIP CAP. 0.1uF GRM155B11A104KA01D K22108802 1-41 C 1274 CHIP CAP. 0.1uF GRM155B11A104KA01D K22108802 C 1276 CHIP CAP. 33pF GRM1552C1H330JZ01D K22178224...
  • Page 29 Main Unit Parts List REF. DESCRIPTION VALUE TOL. MFR’S DESIG VXSTD P/N VERS. LOT. SIDE LAY ADR C 1333 CHIP TA.CAP. 4.7uF TEESVA1C475M8R K78120031 C 1334 CHIP CAP. 0.1uF GRM155B11A104KA01D K22108802 C 1335 CHIP CAP. 0.001uF GRM155B11H102KA01D K22178809 C 1336 CHIP TA.CAP. 10uF 6.3V TEESVA0J106M8R...
  • Page 30 Main Unit Parts List REF. DESCRIPTION VALUE TOL. MFR’S DESIG VXSTD P/N VERS. LOT. SIDE LAY ADR C 1382 CHIP CAP. 0.001uF GRM155B11H102KA01D K22178809 C 1383 CHIP CAP. 220pF GRM155B11H221KA01D K22178801 C 1383 CHIP CAP. 220pF GRM36CH221J25PT K22148203 C 1383 CHIP CAP. 220pF GRM1552C1H221JA01D K22179713...
  • Page 31 Main Unit Parts List REF. DESCRIPTION VALUE TOL. MFR’S DESIG VXSTD P/N VERS. LOT. SIDE LAY ADR C 1451 CHIP CAP. 100pF GRM1552C1H101JD01D K22178236 CD1001 CERAMIC DISC ECDA450C24 H7901460 CF1001 CERAMIC FILTER ELFY450E H3900549 CF1002 CERAMIC FILTER ELFC450G H3900538 CF1002 CERAMIC FILTER ELFC450G H3900538 D 1001 DIODE...
  • Page 32 Main Unit Parts List REF. DESCRIPTION VALUE TOL. MFR’S DESIG VXSTD P/N VERS. LOT. SIDE LAY ADR F 1001 CHIP FUSE 3.15A FHC16 322ADTP Q0000118 NON IS FB1001 FERRITE BEADS SMB304729 L9190094 FB1002 FERRITE BEADS BLM21A121SPT L9190108 HS1001 HEATSINK PLATE RA0697800 J 1001 CONNECTOR...
  • Page 33 Main Unit Parts List REF. DESCRIPTION VALUE TOL. MFR’S DESIG VXSTD P/N VERS. LOT. SIDE LAY ADR L 1056 M.RFC 33uH FLC32T-330J L1690221 L 1057 M.RFC 0.15uH HK1608 R15J-T L1690938 Q 1001 IC CD4053BPWR G1093864 Q 1001 IC NJU4053BV-TE1 G1092927 Q 1002 TRANSISTOR XP1501-(TX) G3070143...
  • Page 34 Main Unit Parts List REF. DESCRIPTION VALUE TOL. MFR’S DESIG VXSTD P/N VERS. LOT. SIDE LAY ADR Q 1055 TRANSISTOR 2SD1767 T100 Q G3417677Q Q 1056 TRANSISTOR 2SC4617 TL R G3346178R Q 1057 TRANSISTOR DTC114TE TL G3070225 Q 1058 TRANSISTOR 2SC5226-4-TL G3352268D Q 1059 TRANSISTOR...
  • Page 35 Main Unit Parts List REF. DESCRIPTION VALUE TOL. MFR’S DESIG VXSTD P/N VERS. LOT. SIDE LAY ADR R 1023 CHIP RES. 2.2k 1/16W 5% RMC1/16S 222JTH J24189029 R 1024 CHIP RES. 1/16W 5% RMC1/16S 103JTH J24189037 R 1025 CHIP RES. 1/16W 5% RMC1/16S 102JTH J24189025...
  • Page 36 Main Unit Parts List REF. DESCRIPTION VALUE TOL. MFR’S DESIG VXSTD P/N VERS. LOT. SIDE LAY ADR R 1084 CHIP RES. 1/16W 5% RMC1/16S 103JTH J24189037 R 1085 CHIP RES. 1/16W 5% RMC1/16S 563JTH J24189046 R 1086 CHIP RES. 1/16W 5% RMC1/16S 393JTH J24189044 R 1087 CHIP RES.
  • Page 37 Main Unit Parts List REF. DESCRIPTION VALUE TOL. MFR’S DESIG VXSTD P/N VERS. LOT. SIDE LAY ADR R 1144 CHIP RES. 1/16W 5% RMC1/16S 820JTH J24189012 R 1144 CHIP RES. 1/16W 5% RMC1/16S 470JTH J24189009 R 1145 CHIP RES. 1/16W 5% RMC1/16S 561JTH J24189022 R 1146 CHIP RES.
  • Page 38 Main Unit Parts List REF. DESCRIPTION VALUE TOL. MFR’S DESIG VXSTD P/N VERS. LOT. SIDE LAY ADR R 1212 CHIP RES. 1/16W 5% RMC1/16S 563JTH J24189046 R 1213 CHIP RES. 150k 1/16W 5% RMC1/16S 154JTH J24189051 R 1214 CHIP RES. 1/16W 5% RMC1/16S 473JTH J24189045...
  • Page 39 Main Unit Parts List REF. DESCRIPTION VALUE TOL. MFR’S DESIG VXSTD P/N VERS. LOT. SIDE LAY ADR R 1278 CHIP RES. 1/16W 5% RMC1/16S 331JTH J24189019 R 1279 CHIP RES. 8.2k 1/16W 5% RMC1/16S 822JTH J24189036 R 1280 CHIP RES. 1/16W 5% RMC1/16S 102JTH J24189025...
  • Page 40 Main Unit Parts List REF. DESCRIPTION VALUE TOL. MFR’S DESIG VXSTD P/N VERS. LOT. SIDE LAY ADR R 1336 CHIP RES. 1/16W 5% RMC1/16S 102JTH J24189025 R 1337 CHIP RES. 1/16W 5% RMC1/16S 102JTH J24189025 R 1338 CHIP RES. 1/16W 5% RMC1/16S 102JTH J24189025 R 1339 CHIP RES.
  • Page 41 Main Unit Parts List REF. DESCRIPTION VALUE TOL. MFR’S DESIG VXSTD P/N VERS. LOT. SIDE LAY ADR R 1394 CHIP RES. 1/16W 5% RMC1/16S 220JTH J24189005 R 1395 CHIP RES. 1/16W 5% RMC1/16S 102JTH J24189025 R 1396 CHIP RES. 1/16W 5% RMC1/16S 102JTH J24189025 R 1397 CHIP RES.
  • Page 42 Main Unit Parts List REF. DESCRIPTION VALUE TOL. MFR’S DESIG VXSTD P/N VERS. LOT. SIDE LAY ADR R 1456 CHIP RES. 1/16W 5% RMC1/16S 102JTH J24189025 R 1457 CHIP RES. 1/16W 5% RMC1/16S 102JTH J24189025 R 1458 CHIP RES. 1/16W 5% RMC1/16S 102JTH J24189025 R 1459 CHIP RES.

  • Page 43: Display Unit

    Display Unit Circuit Diagram (Lot. 1-3) PWR ON: 5.0 V PWR OFF: 0 V 7.4 V 3.8 V @25 °C 6.3 V LAMP ON: 3.1 V LAMP OFF: 3.7 V PWR ON: 3.2 V PWR OFF: 0 V 2.9 V @25 °C LAMP ON: 3.1 V LAMP ON: 1.3 V LAMP OFF: 3.9 V...
  • Page 44 Display Unit Note VX-920/-920E VHF series Service Manual...
  • Page 45 Display Unit Parts Layout (Lot. 1-3) Segment Common (Side A) (DS2001) VX-920/-920E VHF series Service Manual...
  • Page 46 Display Unit Parts Layout (Lot. 1-3) (Side B) NJU6624AFG1 2SA1602 (MF) DTC114TE (04) XP1501 (5R) TAR5S50U (Q2006) (Q2005) (Q2001, 2002) (Q2004) (Q2003) VX-920/-920E VHF series Service Manual...
  • Page 47 Display Unit Circuit Diagram (Lot. 4-) VX-920/-920E VHF series Service Manual...
  • Page 48 Display Unit Note VX-920/-920E VHF series Service Manual...
  • Page 49 Display Unit Parts Layout (Lot. 4-) Segment (Side A) Common (DS2001) VX-920/-920E VHF series Service Manual...
  • Page 50 Display Unit Parts Layout (Lot. 4-) (Side B) NJU6624AFG1 2SA1602 (MF) DTC114TE (04) XP1501 (5R) TAR5S50U (Q2006) (Q2005) (Q2001, 2002) (Q2004) (Q2003) VX-920/-920E VHF series Service Manual...
  • Page 51 Display Unit Parts List REF. DESCRIPTION VALUE TOL. MFR’S DESIG VXSTD P/N VERS. LOT. SIDE LAY ADR PCB with Components CB2255001 NOT IS, W/ LCD PCB with Components CB2255002 IS TYPE, W/ LCD C 2001 CHIP CAP. 0.1uF GRM155B11A104KA01D K22108802 C 2002 CHIP CAP.
  • Page 52 Display Unit Parts List REF. DESCRIPTION VALUE TOL. MFR’S DESIG VXSTD P/N VERS. LOT. SIDE LAY ADR R 2015 CHIP RES. 1/16W 5% RMC1/16S 102JTH J24189025 R 2016 CHIP RES. 1/16W 5% RMC1/16S 102JTH J24189025 R 2017 CHIP RES. 1/16W 5% RMC1/16S 473JTH J24189045 R 2018 CHIP RES.

  • Page 53: Cable Unit

    Cable Unit Circuit Diagram Parts Layout Parts List REF. DESCRIPTION VALUE TOL. MFR’S DESIG VXSTD P/N VERS. LOT. SIDE LAY ADR C 5001 CHIP CAP. 0.001uF GRM188B11H102KA01D K22174821 C 5002 CHIP CAP. 0.001uF GRM188B11H102KA01D K22174821 MC5001 MIC. ELEMENT EM-140 M3290032 MC5002 MIC.
  • Page 54 Cable Unit Note VX-920/-920E VHF series Service Manual...

  • Page 55: Srx-3 Unit (Option)

    SRX-3 Unit (Option) Circuit Diagram VX-920/-920E VHF series Service Manual...
  • Page 56 SRX-3 Unit (Option) Parts Layout (Side A) Parts Layout (Side B) TC4S66F (C9) RT1N441U (P3) UNR911FJ0L (60) 2SC4617 (BR) (Q4001) (Q4011, 4012) (Q4003) (Q4004) 2SC5226 (R22) (Q4006, 4007, 4009, 4010) 2SK508 (K52) 3SK320 (U7) RT1P441U (N3) (Q4005) (Q4008) (Q4002) VX-920/-920E VHF series Service Manual...
  • Page 57 SRX-3 Unit (Option) Parts List REF. DESCRIPTION VALUE TOL. MFR’S DESIG VXSTD P/N VERS. LOT. SIDE LAY ADR C 4001 CHIP CAP. 10pF GRM1552C1H100JZ01D K22178212 C 4001 CHIP CAP. 0.001uF GRM155B11H102KA01D K22178809 C 4002 CHIP CAP. GRM1552C1H8R0DZ01D K22178210 C 4003 CHIP CAP. 100pF GRM1552C1H101JD01D K22178236...
  • Page 58 SRX-3 Unit (Option) Parts List REF. DESCRIPTION VALUE TOL. MFR’S DESIG VXSTD P/N VERS. LOT. SIDE LAY ADR C 4068 CHIP CAP. GRM1552C1H8R0DZ01D K22178210 C 4070 CHIP CAP. GRM1554C1H2R0CZ01D K22178204 C 4071 CHIP CAP. 0.001uF GRM155B11H102KA01D K22178809 C 4072 CHIP CAP. 100pF GRM1552C1H101JD01D K22178236...
  • Page 59 SRX-3 Unit (Option) Parts List REF. DESCRIPTION VALUE TOL. MFR’S DESIG VXSTD P/N VERS. LOT. SIDE LAY ADR Q 4010 TRANSISTOR 2SC5226-4-TL G3352268D Q 4011 TRANSISTOR RT1N441U-T11-1 G3070247 Q 4011 TRANSISTOR DTC144EE TL G3070075 Q 4012 TRANSISTOR RT1N441U-T11-1 G3070247 Q 4012 TRANSISTOR DTC144EE TL G3070075 R 4001 CHIP RES.
  • Page 60 SRX-3 Unit (Option) Note VX-920/-920E VHF series Service Manual...
  • Page 61 VX-920/-920E VHF series Service Manual...
  • Page 62 Copyright 2011 VERTEX STANDARD CO., LTD. All rights reserved No portion of this manual may be reproduced without the permission of VERTEX STANDARD CO., LTD. VX-920/-920E VHF series Service Manual...

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