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Yaesu FT-26 Technical Supplement

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TECHNICAL SUPPLEMENT
FT·26
YAESU MUSEN CO.,LTD.
C.P.O.BOX 1500, TOKYO. JAPAN
YAESU U.S.A.
17210 Edwards Rd. Cerritos, Californi
YAESU EUROPE
Snipweg 3. 1118AA Schiphol The
�
fY
, 9
701 U.S.A.
B.V.
NETHERLANDS··

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  • Page 1 FT·26 TECHNICAL SUPPLEMENT YAESU MUSEN CO.,LTD. C.P.O.BOX 1500, TOKYO. JAPAN YAESU U.S.A. � 17210 Edwards Rd. Cerritos, Californi 701 U.S.A. YAESU EUROPE B.V. Snipweg 3. 1118AA Schiphol The NETHERLANDS··...

  • Page 3: Table Of Contents

    Contents 1. Hardware Information & Case Disassembly PCB Access Ex p loded View Packaging 2. Chip Component Information 3. Circuit Description ........4-1 4.

  • Page 5: Case Disassembly

    Fig. Fig. Pry up on each side of the flat cable socket. Fig. Push the flat cable into its socket, and press down on each side of the socket Fig. alternately . FT-26 Technical Suppl em en...

  • Page 6: Exploded View

    PAN HEAD SCREW U07240101 M2X4# 1 ® BINDING HEAD SCREW M2. 6X38 SUS U 20203027 R013 7620 Fitting TAPTITE SCREW U43110027 M2X 10B ® FLAT HEAD SCREW U30103001 M2X3 ® R05 1�99 0 EX NUT U60100301 Be lt Clip FT-26 Technical Supplement...

  • Page 7: Packaging

    Packa g in g � Warranty Registration Card E02531000 Operating Manual V1516240 P adding Sheet 09500012 NC-18B 09500013 NC-18C 09500028 NC-28B A02870001 FNB-27 A0286 0001 FNB-26 R0515990 A02850001 FNB-25 A02880001 FNB-28 V0516280 Carton Box V1806630 P adding 1 -3...

  • Page 9: Chip Component Information

    1 . 25 10 1 0 . 8 0 . 45 1/16 1. 6 10 2 INDICATED LETTERS 1 2 3 4 10 s 10 1 10 s • 5 Iii ' • Examples: 2 . 2kQ • 47kQ FT-26 Technical Supplement...
  • Page 10 3007, 301 1 , 3015 Tr, EMITTER 258799 4002,6008 0 1 005, 3006 2504245 Tr, BASE 400 1 , 4007 (01015) 2504215 2501366 (02011, 3002, 6006) (02013) I MB6 25A1586 (020 1 4) (04003, 6009) FT-26 Technical Suppl em en...
  • Page 11 · � ANODE ANODE . \ ,.-' ANODE 2 ANODE 2 > 1SS319 1SS272 ( 02007 ) (02004, 2006) " • CATHODE '-... ANODE 1SS300 FMP1 (02016, 6005) (02002, 2005) CATHODE 1SS294 (03002) 02CZ2.0X ( 01003) FT-26 Technical Suppl em en...
  • Page 12 :N"otes...

  • Page 13: Circuit Description

    Circuit D escription passed through audio muting gate Q3016 The FT-26 electronics consists of two major (2SJ- boards: the Motherboard (or Mother Unit) and the This filtered receiver audio is then mixed 125D). Control Unit, and several minor boards: the IF...
  • Page 14 5-V pulsed output with pulse duration de­ and disables the front panel keys via Q2014 (1 M- pending on the phase difference between the input on the Control Unit. signals. This pulse train is passed to the Clock Unit FT-26 Technical Supplement...
  • Page 15 CTCSS tone in Japanese versions only, which is Battery Charger Power Control filtered by Q2009-%. These stages are not used in The EXT jack on the Motherboard applies voltage to the B+ line through diode D1006 to other versions. FT-26 Technical Supplement...

  • Page 17: Alignm.ent

    Problems caused by unauthorized attempts at ranty policy may be voided. realignment are not covered by the warranty pol­ icy. Also, Yaesu must reserve the right to change The following procedures cover the sometimes circuits and alignment procedures in the interest of critical and tedious adjustments not normally re­...
  • Page 18 Note: Signal levels in dB referred to in the align­ the low and high band edges to confirm trans­ ment procedure are based on 0 dBµ= 0.5 dBµV. mitter output between 0.2 and lW. FT-26 Technical Supplement...
  • Page 19 8-ohm load resistor Receiver Regulated l 2V Set up the test equipment as shown at the right receiver alignment. Sensitivity: Interstage Transformers With the transceiver and signal generator both tuned to band center (145 or 146 MHz), FT-26 Technical Supplement...
  • Page 20 :N"otes...

  • Page 21: Block Diagram

    Block Diagram X3001 1 7 . 245MHz 1 7 . 7111 H z Q 1 0 1 6 XF1 001 Q3002 Q3004 01 0 1 1 '1 4 Q1 008 CF3001 RF At.IP lll l X lll C F IF At.IP CFWlll 4 55F 1 SS 1 3S MC3372...

  • Page 22: Mother Unit Parts List

    GRM39C H 0 4 0 C 5 0PT 5 0 V c 1 05 9 K 2 2 1 7 4 2 2 3 CH I P CAP. GRM 3 9 C H 3 3 0 J 5 0PT 33pF 5 0 V FT-26 Technical Supplement...
  • Page 23 32CS 3 8 0 LB-4R7M=P 4 . 7uH L 1 00 4 L 1 6 9 0 0 1 6 C O I L 3 2 C S 3 8 0 LB- 1 RO M = P l uH 5- 3 FT-26 Technical Supplement...
  • Page 25 R312 9 5 3 0 XTAL HOLDER (2pc s ) R0 1 37 6 0 0 SH I ELD PLATE R 0 1 37610 H E AT S I NK PLATE R0 1 40 1 8 0 LEAF SPR I NG FT-26 Technical Supplement...

  • Page 26: Mother Unit Board Layout

    1 005, 1 008, 1 021 OTA 143XU (33) (01015) (01009) OTA 124EU (15) OTC1 24TU (05) CllTHODE (01011) (01014) - BASE 2SC3120 (HB) 2SB799 (ML) EMITTER (01002) (01005) COLLECTOR 1SS302 (C3) LM2931AZ-5.0 (01007, 1018) (01006) BN1L4M (01018) FT-26 Technical Supplement...

  • Page 27: Mother Unit Schematic Diagram

    - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - > J1 004 J 1 00S P009061 0 P0090809 <( "' [ X X ] T X FT-26 Technical Supplement...

  • Page 28: Control ( Cntl) Unit Parts List

    UP0 5 0B10 2K-A O. O O l u F 5 0 V c 2045 K 2 2174 8 0 9 CH I P CAP. GRM39B 1 0 2M5 0PT O . O O l u F 5 0 V FT-26 Technical Supplement...
  • Page 29 C H I P RES. RMC l /16 2 23JATP 2 2K 1/16 W R 2010 J241 8 5 4 7 2 CH I P R E S . RMC l /16 472JATP 4. 7K 1/1 6W FT-26 Technical Supplement...
  • Page 30 1 / 1 6W R 2 0 6 7 J 24 1 85 5 6 3 C H I P RES. RMC l / 1 6 5 6 3JATP 5 6K 1 / 1 6W 5-1 0 FT-26 Technical Supplement...
  • Page 31 R 7 1 3 7 5 7 0 I NTER CONNECTOR ( 2 pcs) R 7 1 3 7 5 8 0 REFLECTOR 5-1 1 -- -- -- -- -- -- -- -- -- -- -- -- -- -- FT-26 Technical Suvvlement...

  • Page 32: Control ( Cntl) Unit Board Layout

    I M N l 0 ( N l .O) FMPl ( P l ) 2SD1366A (AD) I M86 (86) " (02003) (02016) (0201 2, 2014) ( 02002, 2005) (020 1 3) (02014) RH5VA37 AA (07) µPD74H04094G ( 02003 ) (02012) FT-26 Technical Supplement 5-1 2...

  • Page 33: Control (Cntl) Schematic Diagram

    - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - FT-26 Technical Supplement...

  • Page 34: If Unit Parts List

    1 S S 294 T E 8 5 R D 3 0 0 3 G 2 0 7 0 0 8 8 D I OD E 1 S S 3 0 2 T E 8 5 R FT-26 Technical Supplement 5-1 4...
  • Page 35 2 2 0 K 1 / 1 6W R 3046 J 24 1 8 5 1 83 CH I P RES. RMC l / 1 6 1 8 3JATP 1 8K 1 / 1 6W 5-1 5 FT-26 Technical Supplement...
  • Page 36 P O T . R H 0 3AYAJ5X 220K 300 1 H 0 1 0 2 9 8 6 XTAL 1 7. 245MHZ R 3 1 2 9 5 3 0 X T A L HOLDER FT-26 Technical Suppl em en t...
  • Page 37 l'Jotes...

  • Page 38: If Unit Board Layout

    301 1 , 30 1 5 2SC421 5Y (OY) (03002) A NO DE 2SB799 ( M L) • (03006) 2SJ l25D (JD) 1 SS294 (A9) 1 SS302 (C3) (030 1 6) (03002) (03001 , 3003) FT-26 Technical Supplement 5-1 8...

  • Page 39: If Unit Schematic Diagram

    - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - _ _ _ _ [ X X ] T X FT-26 Technical Supplement...

  • Page 40: Apc Unit Parts List

    J 24 1 8 5 1 0 3 CH I P RES. 1 / 1 6W R 40 1 5 J 24 1 8 5 1 0 2 CH I P RES. RMC l / 1 6 1 02JAT P FT-26 Technical Supplement...
  • Page 41 :N"otes...

  • Page 43: Vr Unit Parts List

    VR Unit Parts List R E F . YAESU P / N DESCR I PT I ON MFGR ' S D ES I G VALUE TOL. VERS. - - - - - - - - - - - - - - - - - - -...
  • Page 44 :N"otes...
  • Page 45 VR Unit Board Layout & S chematic D iagram 2 GND SQL VR Z Z IJ.. LL w w <( <( obverse v i ew of "component" side obverse v i ew of "solder" side r - - - - - - - - - - - - - - - - - - - - - - - F 3 2 1 1 o o o S5001 VR5002...

  • Page 46: Pll Unit Parts List

    G 1 0 9 1 1 2 3 MB 1 5 0 4 P F - G-BND-TF Q 6 0 0 8 G 334 1 1 6 7G T RANS I ST OR 2SC4 1 1 6GR T E8 5 R FT-26 Technical Supplement 5-26...
  • Page 47 SH I E L D CASE R 0 5 1 5 7 6 0 R 0 1 3 7 6 5 0 SH I E L D C O V E R ASSY MYLAR R 7 1 38 1 40 FT-26 Technical Supplement...
  • Page 48 PLL Unit Board Layout & S chematic Diagram ..F 3 2 1 2 1 0 1 A U> N � g 0 . 001 ..,_ T6002 L0022 1 09 U • obverse v i ew of "component" side T6001 I gi;;��I L00221 1 0 tD O o C\I...

  • Page 49: Clock Unit Parts List

    K9 1 0 0 0 1 5 1 T R I MMER C A P . ECR-JA0 20 E 1 2X 20pF 7 0 0 1 H 0 1 0 30 0 1 XTAL 1 2. B OOMHZ FT-26 Technical Supplement...
  • Page 50 :N"otes...
  • Page 51 Clock Board Layout & Schematic D ia g ram obverse v i ew of "component" side obverse view of "solder" side r - - - - - - - - - - - - - - - - - - - - - - - - - - - 1 F 3 2 2 2 1 0 1 A L7001 X7001...

  • Page 52: Pager (Pag) Unit Parts List

    M F GR ' S D ES I G VALUE V ERS. R E F . YAESU P / N DESC R I PT I ON - - - - - - - - - - - - - -...
  • Page 53 :N"otes...
  • Page 54 Pa g er Unit Layout & S chematic Dia g ram obverse v i ew of "component" side obverse v iew of "solder" side TC35305F (08101) 1 - - - - - - - - - - - - - - - - - - - - - - - - . F 3 2 3 7 1 0 1 Q81 0 1 TC35305F- 1 1...
  • Page 55 250 . 3 88 . 5 1 27 . 3 1 79 . 9 9 1 . 5 1 3 1 . 8 1 86 . 2 94 . 8 1 36 . 5 1 92 . 8 FT-26 Technical Supplement...
  • Page 56 RMC l / 1 6 8 22JAT P 1 / 1 6W V R 0 1 0 1 J 5 1 7 8 0 4 73 POT. RH04BPAS4X 4 7K R 7 1 3 0 2 0 0 SPONGE FT-26 Technical Suppl em en t...
  • Page 57 FTS-17A Board Layout & S chematic D ia g ram Z Cl "° U> O o bverse v iew of "solder" side <!l f- f- f- f­ CO � � ..., m '° f- :::l Z ...J <C Ul Q. <!l U O f- U obverse v iew of "co m ponent"...
  • Page 58 Agosto...
  • Page 59 YA E SU Copyright © 1 9 9 1 No por t i on of th i s manual Yaesu Musen C o . , Ltd . may be reproduced w i thout the perm i ss ion of All rights reserved.

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