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Yaesu
Transceiver
FT-2900R
Technical Supplement

Yaesu FT-2900R Technical Supplement

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Introduction

This manual provides technical information necessary for servicing the FT-2900R 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 compo-

nents (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.

EH039N90A

Technical Supplement

Specifications ...................................................... 2

Exploded View & Miscellaneous Parts ............ 3

Block Diagram .................................................... 5

Connection Diagram .......................................... 6

Circuit Description............................................. 7

Alignment ............................................................ 9

Contents

Board Unit

(Schematics, Layouts & Parts)

MAIN Unit Circuit Diagram ................................. 13

MAIN Unit Parts Layout ....................................... 15

MAIN Unit Parts List ............................................ 17

CNTL Unit Circuit Diagram ................................. 27

CNTL Parts Layout ............................................... 28

CNTL Parts List .................................................... 29

FM TRANSCEIVER

FT-2900R

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 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

VERTEX STANDARD (AUSTRALIA) PTY., LTD.

Normanby Business Park, Unit 14/45 Normanby Road

Notting Hill 3168, Victoria, Australia

Important Note

The 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 appara-

tus. 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.

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Summary of FT-2900R

Page 1
1 introduction this manual provides technical information necessary for servicing the ft-2900r 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 covere...
Page 2: Specifications
2 specifications general frequency range: tx 144 - 146 mhz or 144 - 148 mhz rx 144 - 146 mhz or 136 - 174 mhz channel step: 5/10/12.5/15/20/25/50/100 khz standard repeater shift: ±600 khz frequency stability: better than ±10 ppm [–4 °f to +140 °f (–20 °c to +60 °c)] modes of emission: f2d/f3e antenn...
Page 3
3 exploded view & miscellaneous parts g d g d d d e e m4090178 speaker non-designated parts are available only as part of a designated assembly. S8002063 cap-sp ra1104900 front panel ra1105000 rubber knob g6090192 lcd ra1131200 inter connector s8002060 filter lcd cntl unit main unit ra1120000 ground...
Page 4: Note
4 note.
Page 5: Block Diagram
5 block diagram.
Page 6: Connection Diagram
6 connection diagram.
Page 7: Circuit Description
7 circuit description receive signal path incoming rf signal is from the antenna jack is deliv- ered to the main unit and passed through the low- pass filter network consisting capacitors c1213, c1236, c1238, c1239, & c1241 and coils l1017, l1018, & l1019, antenna switching diode d1020 and d1028 (bo...
Page 8: Circuit Description
8 circuit description tx apc circuit a portion of the power amplifier module output is rectified by d1022 (1ss321), then delivered to apc q1038 (lm2904pwr), as a dc voltage which is pro- portional to the output level of the power amplifier module. The apc q1038 (lm2904pwr) is compared the rec- tifie...
Page 9: Alignment
9 alignment introduction the ft-2900r is carefully aligned at the factory for the specified performance across the amateur band. Realignment should therefore not be necessary ex- cept in the event of a component failure. Only an authorized vertex standard representative should perform all component ...
Page 10: Test Setup
10 alignment preparation & precautions a 50-ohm rf load and in-line wattmeter must be connected to the antenna jack in all procedures that call for transmission; alignment is not possible with an antenna. After completing one step, read the next step to see if the same test equipment is required. If...
Page 11: Alignment
11 s-meter level (s-1) inject a 145.100 mhz signal at a level of –5 dbµ (with 1 khz modulation @±3.5 khz deviation) from the rf signal generator. rotate the dial knob to set the alignment param- eter to “b0111 s1 b0111 s1 b0111 s1 b0111 s1 b0111 s1.” press the [d/mr(mw)] key to enable adjustme...
Page 12: Alignment
12 dcs tx deviation rotate the dial knob to set the alignment param- eter to “b0101 dc b0101 dc b0101 dc b0101 dc b0101 dc.” press the [d/mr(mw)] key to enable adjustment of the “dcs tx deviation.” press the ptt switch to activate the transmitter, adjust the dial knob so that the deviation met...
Page 13: Main Unit
13 main unit circuit diagram 4.3 v (4.3 v) 4.9 v (4.9 v) 4.0 v (4.0 v) 2.0 v (2.0 v) 1.3 v (1.3 v) 0.7 v (0.7 v) 3.4 v (3.4 v) 3.3 v (3.3 v) 0.6 v (0.6 v) 0.7 v (0.6 v) 6.2 v (4.5 v) 0.0 v (5.3 v) 7.0 v (0.0 v) 0.0 v (1.6 v) 0.0 v (1.2 v) 0.0 v (7.0 v) 5.1 v (0.0 v) 4.9 v (0.0 v) 2.3 v (0.0 v) 0.0 v...
Page 14: Main Unit
14 main unit note.
Page 15: Main Unit
15 main unit parts layout (side a) b a d c e f g 1 2 3 4 5 2sa1774 (fr) (q1007) 2sc4081 (b) (q1033) 2sc4400 (rt4) (q1032) 2sc4617 (br) (q1051, 1053) 2sc5226 (r22) (q1026) 2sc5231 (c9) (q1009) 2sc5374 (na) (q1010, 1017, 1023) dan235e (m) (d1010) cd4094bpwr (q1048) mb15a01pfv1 (q1011) njm2591v (q1028)...
Page 16: Main Unit
16 main unit parts layout (side b) b a d c e f g 1 2 3 4 5 2sa1774 (fr) (q1024, 2027, 1029) 2sc4081 (b) (q1001, 1012, 1021, 1046, 1047) fmmtl718ta (q1025) 2sj364 (4m) (q1034, 1036, 1041, 1042) lm2904pwr (q1006, 1038, 1044, 1050) lm2902pwr (q1005, 1049) dtc144ee (26) (q1013, 1018, 1019, 1020, 1031, 1...
Page 17: Parts List
17 pcb with components cs2040501 1- printed circuit board fr020070c 1- c 1001 chip ta.Cap. 10uf 10v taja106m010y k78100072 1- b f4 c 1002 chip ta.Cap. 10uf 10v taja106m010y k78100072 1- b f4 c 1003 chip cap. 0.01uf 50v b grm188b11h103ka01d k22174823 1- b f3 c 1004 chip cap. 0.0047uf 50v b grm188b11h...
Page 18: Parts List
18 parts list main unit ref description value v/w tol. Mfr's desig vxstd p/n vers. Lot side lay adr c 1079 chip cap. 150pf 50v ch grm1882c1h151ja01d k22174239 1- b e5 c 1080 chip cap. 560pf 50v ch grm1882c1h561ja01d k22174273 1- b e5 c 1081 chip cap. 0.001uf 50v b grm188b11h102ka01d k22174821 1- b f...
Page 19: Parts List
19 parts list main unit ref description value v/w tol. Vxstd p/n vers. Lot side lay adr c 1162 chip cap. 0.001uf 50v b grm188b11h102ka01d k22174821 1- b d3 c 1163 al.Electro.Cap. 10uf 16v uwx1c100mcl1gb k48120026 1- a d2 c 1164 chip ta.Cap. 4.7uf 16v taja475m016y k78120079 1- b c3 c 1165 chip cap. 0...
Page 20: Parts List
20 parts list main unit ref description value v/w tol. Mfr's desig vxstd p/n vers. Lot side lay adr c 1249 chip cap. 1pf 50v ck grm1884c1h1r0bz01d k22174267 1- a f4 c 1250 chip cap. 22pf 50v ch grm1882c1h220ja01d k22174219 1- a f4 c 1251 chip cap. 1pf 50v ck grm1884c1h1r0bz01d k22174267 1- a f3 c 12...
Page 21: Parts List
21 parts list main unit ref description v/w tol. Mfr's desig vxstd p/n vers. Lot side lay adr fb1002 ferrite beads smb304729 l9190094 1- a b1 fb1003 ferrite beads smb304729 l9190094 1- a a1 fb1004 ferrite beads smb304729 l9190094 1- a b1 fb1005 ferrite beads smb304729 l9190094 1- a b2 fb1006 ferrite...
Page 22: Parts List
22 parts list main unit ref description value v/w tol. Mfr's desig vxstd p/n vers. Lot side lay adr q 1044 ic lm2904pwr g1094010 1- b c4 q 1045 fet 3sk296zq-tl-e g4802968 1- a f3 q 1046 transistor 2sc4081 t106 r g3340818r 1- b c3 q 1047 transistor 2sc4081 t106 r g3340818r 1- b c3 q 1048 ic cd4094bpw...
Page 23: Parts List
23 parts list main unit description value v/w tol. Mfr's desig vxstd p/n vers. Lot side lay adr ref r 1067 chip res. 390k 1/16w 5% rmc1/16s 394jth j24189056 1- b e5 r 1068 chip res. 100k 1/16w 5% rmc1/16s 104jth j24189049 1- b f4 r 1069 chip res. 100k 1/16w 5% rmc1/16s 104jth j24189049 1- a c3 r 107...
Page 24: Parts List
24 parts list main unit ref description value v/w tol. Mfr's desig vxstd p/n vers. Lot side lay adr r 1146 chip res. 82 1w 5% rmc1 820jte j24305820 1- a e3 r 1147 chip res. 220k 1/16w 5% rmc1/16s 224jth j24189053 1- b c3 r 1148 chip res. 10k 1/16w 5% rmc1/16s 103jth j24189037 1- b c3 r 1149 chip res...
Page 25: Parts List
25 parts list main unit ref description value v/w tol. Mfr's desig vxstd p/n vers. Lot side lay adr r 1224 chip res. 330k 1/16w 5% rmc1/16s 334jth j24189055 1- b b5 r 1225 chip res. 330k 1/16w 5% rmc1/16s 334jth j24189055 1- a d5 r 1226 chip res. 5.6k 1/16w 5% rmc1/16s 562jth j24189034 1- b a2 r 122...
Page 26: Main Unit
26 main unit note.
Page 27: Cntl Unit
27 cntl unit circuit diagram 3.5 v (3.5 v) 5.0 v (5.0 v) 3.8 v (3.8 v) 3.3 v (3.3 v) 5.0 v (5.0 v) 3.3 v (3.3 v) 3.8 v (3.8 v) 2.3 v (2.3 v) 5.0 v (5.0 v) 5.0 v (5.0 v) q 2001 pin rx tx note 43 0.0 v 4.0 vp-p tone on 44 0.0 v 5.0 vp-p dcs on 47 4.9 v 4.9 v 48 4.9 v 4.9 v 49 2.9 v 2.9 v 50 2.0 v 2.0 ...
Page 28: Cntl Unit
28 cntl unit parts layout b a d c e f g 1 2 2sc4617 (br) (q2006, 2007, 2012) 2sc5374 (na) (q2002) br24l64 (q2005) hd64f2266tf13 (q2001) b a d c e f g 1 2 s-812c50aua (q2009) dtc143ze (e23) (q2003) bd4830fve (q2010) cph6202 (cb) (q2004) dan222 (n) (d2024) da221 (26) (d2001, 2025) (side a) (side b).
Page 29: Parts List
29 pcb with components printed circuit board fr020080c 1- c 2001 chip cap. 0.001uf 50v b grm155b11h102ka01d k22178809 1- b g2 c 2002 chip cap. 0.001uf 50v b grm155b11h102ka01d k22178809 1- b g2 c 2003 chip cap. 0.001uf 50v b grm155b11h102ka01d k22178809 1- b g2 c 2004 chip cap. 0.001uf 50v b grm155b...
Page 30: Parts List
30 parts list cntl unit ref description value v/w tol. Mfr's desig vxstd p/n vers. Lot side lay adr Ú : please contact vertex standard d 2011 led sml-512wwt86 g2071104 1- a e2 d 2012 led sml-512wwt86 g2071104 1- a f2 d 2013 led sml-512wwt86 g2071104 1- a g2 d 2014 diode 1ss400 te61 g2070634 1- b c1 ...
Page 31: Parts List
31 parts list cntl unit ref description value v/w tol. Mfr's desig vxstd p/n vers. Lot … lay adr r 2037 chip res. 390k 1/16w 0.5% mcr01mzpd3903 j24189331 1- b d2 r 2038 chip res. 10k 1/16w 0.5% mcr01mzpd1002 j24189374 1- b d2 r 2040 chip res. 10 1w 5% rmc1 100jte j24305100 1- b f1 r 2042 chip res. 4...
Page 32: Note
32 note cntl unit.
Page 33
33.