1. Manuals
  2. Brands
  3. Yaesu Manuals
  4. Two-Way Radio
  5. FT-51R
  6. Technical supplement

Yaesu FT-51R Technical Supplement

Hide thumbs Also See for FT-51R:
Table of Contents

Advertisement

Quick Links

Download this manual
FT-51R
Technical Supplement
) I (
YAESU MUSEN CO., LTD.
C.P.O. Box 1500, Tokyo, Japan
YAESU U.S.A.
17210 Edwards Rd., Cerritos, California
U.S.A.
YAESU EUROPE
3.
Snipweg
1118DN Schiphol, The Netherlands
YAESU UK LTD.
Unit 2, Maple Grove Business Centre
Lawrence Rd., Hounslow, Middlesex TW4 6DR, UK
B.V.
90703

Advertisement

Table of Contents
loading

Related Manuals for Yaesu FT-51R

Summary of Contents for Yaesu FT-51R

  • Page 1 FT-51R Technical Supplement ) I ( YAESU MUSEN CO., LTD. C.P.O. Box 1500, Tokyo, Japan YAESU U.S.A. 90703 17210 Edwards Rd., Cerritos, California U.S.A. YAESU EUROPE B.V. Snipweg 1118DN Schiphol, The Netherlands YAESU UK LTD. Unit 2, Maple Grove Business Centre...

  • Page 2: Table Of Contents

    430 - VCO Unit ..........4E CONTACT Unit ..........4F KEY Unit MIC Unit ............ 4H , -------- ---- - -------- --- , FT-51R Cut out the label at the right and place it Technical Supplement behind the clear plastic window in the L------------------------�...
  • Page 3 While we believe the information in this manual to handling surface-mount chip components. Attempts be correct, Yaesu Musen assumes no liability for dam­ by non-qualified persons to service this equipment age that may occur as a result of typographical or may result in permanent damage not covered by the other errors that may be present.

  • Page 5: Chip Component Information

    1 2 3 4 10 2 5 & ' : • 1 05 10 6 10 1 10 8 Type (Unit: mm) 1 /10 1.25 0.5 Examples: 1/16 1.6 0.45 lOO=lOQ 222=2.2kQ 1/16S 1.0 0.5 0.35 473=47kQ FT-51R Technical Suoolement...
  • Page 6 Dispose of the chip when removed. @ After removing the chip, use the copper braid and soldering iron to wick away any excess solder and smooth the land for installation of the replacement part. 1 -4 FT-51R Technical Su1J1Jlement...
  • Page 7 Do not apply heat for more than 3 seconds. @ Remove the tweezers and solder the electrode on the other side in the manner just described. 1 -5 FT-51R Technical Suoolement...
  • Page 8 1 -6 FT-51R Technical Suoolement...

  • Page 9: Transceiver Disassembly And Pcb Access

    2). Be careful not to mix removed screws (some appear similar, but have different types of thread­ the Mother Unit (Figure 4). ing/pitch). CONTACT UNIT PCB Figure 2. Figure 4. FT-51R Technical Suoolement...
  • Page 12 2 -4 FT-51R Technical Suoolement...
  • Page 13 U9900051 TAPTITESCREW M2X4B #3 U99000 5 2 TAPTITESCREW M2X12NI #3 U9900053 SCREW M2 2.5NI U9900055 T APTITE SCREW M2 12. 7NI # 3 Non-designated parts are available only as part of a designated assembly. 2 - 5 FT-51R Technical Suoolement...

  • Page 15: Alignment

    Correct alignment is not possible with alignment are not covered by the warranty policy. an antenna. Also, Yaesu reserves the right to change circuits and After completing one step, read the following step alignment procedures in the interest of improved per­...
  • Page 16 11 VDC power to the transceiver using miniature hook-on clips applied to the points on the 144-Mother Unit Alignemnt Points Contact Unit PCB as shown below. TP6001 & TP6002 HOOK-ON MINI-CLIPS Hook-On Clip DC Power Connection FT-51R Technical Suoolement...
  • Page 17 430- if necessary, so the counter frequency is within 100 Mother Unit assembly. Next, remove the 5 screws Hz of the displayed frequency on the FT-51R. from the shield case on the 144-Mother Unit, and remove the shield case. Transmitter Power Adjustment Connect the 50-Q d y load and inline watt­...
  • Page 18 Tx Deviation (VHF) For A3, B3 C3 Versions only. & VHF Alignment if ifif S-Meter Full-Scale Adjust(VHF) LILI. LI LI • � ,._,c "" LI.LI LI ,,,,,, Tl llU.JJ While tuned to 160.000 MHz adjust the gener­ ator level for 25 mVrms ®1 kHz to the jack.
  • Page 19 Adjust the signal generator level for -5dBµ, This completes the internal alignment routine, to save then press � and rotate the for the next all settings and exit, press@, the frequency display setting. will return to normal. FT-51R Technical Suoolement...

  • Page 21: Circuit Description

    The FT-51R electronics consists of three major products, and is then applied to the limiter amp in boards: the 144 and 430 (MHz) motherboards (or Q2031, which removes amplitude variations in the Mother Units) and the Control Unit, and numerous 455-kHz IF before detection of the speech by ceramic minor boards that mount on these.
  • Page 22 CPU closes Mic Mute gate Q1004 when transmitting When no carrier is received, noise at the output of a tone, or when transmission is disabled. the detector stage in Q3037 is amplified and band­ pass filtered by the noise amp section of Q3037 and FT-51R Technical Suoolement...
  • Page 23 Q3003, Q3001 on the 430 Mother Unit to drive the PA (via the Contact Unit) where Q2020 (UMBlO) turns off module. the receiver, and Q2023 (OTC144EE) and Q2015 (DTA123EE) turn on the transmitter. This tx signal is delivered to the 144 Mother Unit where it causes the FT-51R Technical SumJ/ement...
  • Page 25 However, the dividing data f r om the micro­ TK 1 1230 M) on the 144 and 430 Mother Units. processor is such that the VCO frequency is at the actual transmit frequency (rather than offset for IFs, FT-51R Technical Suoolement...

  • Page 27: Block Diagram

    F 1 u-se . 525WHz - - - - - • TX L I NE FLU•FU-F I U F I V•45.05r.1Hz -- COMMON L I NE FLV-FV+F I V FS•700-999MHz FVV• lFV-F I -' 4 FLS•FS-F J U FT-51R Technical Suoolement...

  • Page 29: Interconnection Diagram

    - - - - - - - - - - - - - - - - - - - - - - - - - - - - - ,- - - - - - - - - - - - - - - - - - - - - - - - - FT-51R Technical Suoolement...
  • Page 31 (See Page 4F-1) L - - - - - - - - - - - - - - 3 1V (37V) r------J ­ &Pooo 1 """"""" '·�" ;:;� LCD Segmentation Circuit Diagram LCD Backplane Circuit Diagram 4A-1 FT-51R T echnical Suoolement...
  • Page 33 ( See Page 4 F- 1 ) Pin 26 Pin 50 HD6473877H M B87078 P F A K2343 M38223E4 H P ( 01001) (01002) ( 01006 ) ( 010 1 6 ) obverse view of display side obverse view of component side FT-51R T echnical Suoolement...
  • Page 35 CNTL Unit Parts List REF. DESCR I PT I ON VALUE TOL. MFGR ' S DES I G YAESU PIN VERS. LOT. LAY ADR * * * * * * - - - ----- ---- ------------ -- - ---- ---- -...
  • Page 36 T EMSVAOJ1 06M-8R K78080027 C 1088 CH I P CAP. 0 . 1 uF GRM408 1 04M25PT K221408 1 1 C 1 089 CH I P CAP. 0. l u F GRM4081 04M25PT K22 1 408 1 1 4A-6 FT-51R Technical Suvvlement...
  • Page 37 C 1 1 37 CH I P CAP. l OOpF TMK 1 05CH 1 0 1 J-F K22 1 48238 C 1 1 38 CH I P CAP. O. O O l u F TMK 1 05 B 1 02K-F K22 1 48820 4A-7 FT-51R Technical Sunnlement...
  • Page 39 RMC 1 / 1 6S JPTH J24 1 89070 R 1 006 CH I P RES. 1 50K 1 / 1 6W 5% RMC 1 / 1 6S 1 54JTH J24 1 89 0 5 1 4A-9 FT-51R Technical Suoolement...
  • Page 41 / 1 6W 0 . 5% RR0 5 1 0P - 1 52-D J24 1 8 9 1 23 R 1 1 08 CH I P RES. 4. 7K 1 / 1 6W 0 . 5% RR0 5 1 0 P-472-D J24 1 89 1 35 4A- 1 1 FT-51R Technical Suoolement...
  • Page 42 R0 1 50250 SH I ELD PLATE (LCD) R0 1 508 1 0 SH I ELD PLATE (CPU) R0 1 50820 MYLAR (R I ) R7 1 50420 I NTER CONNECTOR R7 1 50430 MYLAR (SP) R7 1 50900 FT-51R Technical Suvvlement...
  • Page 43 [x ><J. LAMP UNLESS OTHERWl SE NOTEO. { x >< ) - EL T)( L - - - - - - - - - - - - - - - - - - - - - 48-1 FT-51R Technical Suoolement...
  • Page 45 D A221 ( K ) 2012) Cathode 2S C4227 ( R32) ( 02016) ( 02017, 2018) 2SC4537 ( I S-) ( 02002, 2016, 2029 2032) N.C. 2SC4617 ( BR) Anode 02CZ3 .9Z (3.9) ( 02008 , 2035) ( 02004) FT-51R Technical Suoolement...

  • Page 47: 144 Mother Unit

    C 2044 CH I P CAP. 0. 0 0 l u F TMK 1 0581 02K-F K22 1 48820 C 2045 CH I P CAP. 0. O O l u F TMK 1 05Bl02K-F K22 1 48820 4B-5 FT-51R Technical Suoolement...
  • Page 48 C 2096 CH I P CAP. 22pF TMK 1 05CH220J-F K22 1 48222 C 2098 CH I P CAP. 22pF TMK 1 05CH220J-F K22 1 48222 C 2099 CH I P CAP. 68pF TMK 1 05CH680J-F K22 1 48234 48-6 FT-51R Technical Suoolement...
  • Page 50 Q 2 0 1 8 TRANS I STOR 2SC4227-T2B R32 833422778 Q 20 1 9 I C TC4W66FU T E 1 2L G 1 09 1 676 Q 2020 TRANS I STOR UMB lON TN 83070 1 0 8 48-8 FT-51R Technical Suoolement...
  • Page 51 1 / 1 6W 0. 5% RR05 1 0R-223-D J24 1 8 9 1 5 1 R 2034 CH I P RES. l SOK 1 / 1 6W 5% RMC 1 / 1 6S 1 84JTH J24 1 89052 48-9 FT-51R Technical Suoolement...
  • Page 52 R 2084 CH I P RES. l / 1 6W RMC 1 / 1 6S JPTH J24 1 89070 R 2085 CH I P RES. 1 / 1 6W 0 . 5% RR05 1 0P-39 1 -D J24 1 89 1 09 FT-51R Technical Suoolement...
  • Page 53 RH03AVA 1 4X0 1 A J50785 1 03 X 200 1 XTAL 44. 595MHz H 0 1 03074 XF200 1 XTAL D450 1 5AC 1 H l 1 0225 1 HOLDER PLATE (PM. ) R 0 1 50700 48-1 1 FT-51R Technical Suoolement...
  • Page 55 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4C-1 FT-51R Technical Suvvlement...
  • Page 57 ( 03008 , 3010, 3012, 301 3) ( 03014, 3015) OA221 ( K ) Cathode Cathode ( 0 3016 ) Anode N.C. Anode N.C. R D3.6MB1 (361 ) MA721 ( M 1 M ) ( 03004) ( 03009) FT-51R Technical Suvvlement...

  • Page 59: 430 - Mother Unit

    K221482 1 8 C 3043 TANTALUM CH I P CAP. 4. 7uF 6. 3V T EMSVAOJ475M-8R K78080 0 1 7 C 3044 TANTALUM CH I P CAP. l Ou F 6. 3V TEMSVAOJ 1 06M-8R K78080027 4C-5 FT-51R Technical Suoolement...
  • Page 60 EMK 1 05CH 1 5 1 J-F K 2 2 1 28204 C 3099 CH I P CAP. TMK 1 05CK0 1 0C-F K22 1 48205 C 3 1 00 CH I P CAP. 22pF TMK1 05CH220J-F K22 1 48222 4C-6 FT-51R Technical Suoolement...
  • Page 61 O . O O l u F TMK 1 05 8 1 02K-F K22 1 48820 C 3 1 59 CH I P CAP. 0. O O l u F GRM39 8 1 0 2M50PT K22 1 74809 4C-7 FT-51R Technical Suoolement...
  • Page 62 D 3026 D I OD E H8U277 82070 1 1 8 300 1 CONNECTOR 9 1 208-068 P 1 090826 3002 CONNECTOR 22P8-JED P009 1007 L 300 1 M. RFC 0. 022uH HK2 125 22NK-T L 1 69038 1 4C-8 FT-51R Technical Suoolement...
  • Page 63 G 1 0 9 1603 Q 3 0 1 9 TRANS I STOR DTA 1 24EE TL G3070 1 1 6 D- 1 Q 3020 TRANS I STOR DTC 1 24EE TL G3070 1 0 9 4C-9 FT-51R Technical Suoolement...
  • Page 64 1 / 1 6W 0. 5% RR0 5 1 0 P- 1 03-0 J24 1 89 143 R 3029 CH I P RES. 1 / 1 6W 0. 5% RR0 5 1 0R-333-0 J24 1 89 1 55 4C-10 FT-51R Technical Suoolement...
  • Page 65 1 / 1 6W 0. 5% RR05 1 0R- 1 04-D J24 1 8 9 1 67 R 3085 CH I P RES. 1. SK 1 / 1 6W 0 . 5% RR0 5 1 0P- 1 82-D J24 1 89 1 25 4C-1 1 FT-51R Technical Suoolement...
  • Page 66 X 300 1 XTAL 12. 80000MHz H0 1 0309 1 X 3002 XTAL 58. 070MHz H0 1 03075 XF300 1 XTAL D58 5 1 5AC 1 H l 1 02252 HOLDER PLATE (PM. ) R0 1 50700 FT-51R Technical Suoolement...

  • Page 67: 144 - Vco Unit

    > > (See Page � <( 48-3) > "' :::;: "' ..: obverse view of connector side Collector Collector Bose Emitter Bose Emitter 2SC4226 ( R24) DTC143ZE ( E23) ( 04001 , 4002, 4003) ( 04004) 40-1 FT-51R Technical Suoolement...
  • Page 69 1 / 1 6W 0. 5% RR05 1 0R-223-D J24 1 8 9 1 5 1 R 4004 CH I P RES. 1 / 1 6W 0 . 5% RR0 5 1 0P-39 1-D J24 1 89 1 09 40-3 FT-51R Technical Suoolement...
  • Page 70 J24 1 89 1 67 R 40 1 3 CH I P RES. l OOK 1 / 1 6W 0 . 5% RR0 5 1 0R- 1 04-D SH I ELD CASE (VCO) R 0 1 50240 FT-51R Technical Suoolement...

  • Page 71: 430 - Vco Unit

    :::> "' < ( See Page 4C-3) ::;: "' "' "' > ...: obverse view of connector side Collector Collector Base Emitter Base Emitter 2SC5006 (24) DTC143ZE ( E23) ( 05001 ' 5002' 5003) ( 05004) 4E-1 FT-51R Technical Suoolement...
  • Page 73 Q 5004 TRANS I STOR DTC 1 43ZE T L G3070 1 0 2 R 500 1 CH I P RES. 1 0 0 1 / 1 6W 0. 5% RR05 1 0P- 1 0 1 -D J24 1 89095 4E-3 FT-51R Technical Sunnlement...
  • Page 74 R 5 0 1 3 CH I P RES. l OOK 1 / 1 6W 0 . 5% RR0 5 1 0R- 1 04-D J24 1 8 9 1 67 R 0 1 50240 SH I ELD CASE (VCO) FT-51R Technical Suoolement...

  • Page 75: Contact Unit

    "' � � ..; .,; To 430-Mother Unit J3002 Flat Ribbon Cable ( P /N F3486000 ) (See Pegs 4C-3) obverse view of connector side Voot S-8 1 230SG ( O F ) ( 06001 ) 4F-1 FT-51R Technical Suoolement...
  • Page 77 2. 2K l / 1 6W 5% RMC l / 1 6 222JATP J24 1 85222 TP600 1 CHECK TERM I NAL RCUOOOOOC Q5000 1 1 3 TP6002 CHECK TERM I NAL Q5000 1 1 3 RCUOOOOOC 4F-3 FT-51R Technical Suoolement...

  • Page 79: Key Unit

    S 7002 T ACT SW I TCH SOP- 1 1 2HST N50900 7 1 S 7003 T ACT SW I TCH SOP- 1 1 2HST N50900 7 1 S 7004 T ACT SW I TCH SOP- 1 1 2HST N509007 1 FT-51R Technical Suoolement...

  • Page 81: Mic Unit

    LOT. LAY ADR * * * M I C UN I T PCB W i th Components CA1 323001 Pr i nted C i rcu i t Board F3485000 MC800 1 M I C ELEMENT EM- 1 25T M3290025 FT-51R Technical Suoolement...
  • Page 83 YAE S U Perf ormance without compromise. Copyright © 1994 No portion of this manual aesu Musen Co., Ltd. may be reproduced right reserved. without the permission of Y aesu Musen Co . , Ltd. Printed in Japan. E05119000 (411w-OY)

Table of Contents