1 introduction this manual provides technical information necessary for servicing the ft-1900r 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...
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...
3 exploded view & miscellaneous parts g c d e f g d d d c c c f f f f f f f f e e e e e e e e e e m4090178 speaker non-designated parts are available only as part of a designated assembly. S8002063 cap-sp ra1105100 front panel ra1105200 rubber knob g6090169 lcd ra0754500 inter connector ra0754600 di...
4 note.
5 block diagram.
6 connection diagram.
7 circuit description receive signal path incoming rf signal is from the antenna jack is de- livered to the main unit and passed through the low- pass filter network consisting capacitors c1213, c1236, c1239, & c1241 and coils l1017, l1018, & l1019, antenna switching diode d1020 and d1028 (both rls1...
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...
9 alignment introduction the ft-1900r 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 ...
10 ft-1900r inline wattmeter sinad meter deviation meter frequency counter rf signal generator af signal generator rf signal generator 50-ohm dummy load mic ant ext sp rf sampling coupler dc input alignment preparation & precautions a 50-ohm rf load and in-line wattmeter must be connected to the ant...
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 pa- rameter to “b0111 s1 b0111 s1 b0111 s1 b0111 s1 b0111 s1.” press the [d/mr(mw)] key to enable adjustme...
12 dcs tx deviation rotate the dial knob to set the alignment pa- rameter 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...
13 main unit circuit diagram 4.3 v 0 v rx: 1.4 v tx: 1.7 v rx: 0 v tx: 0.8 v 4.1 v 2.0 v 1.4 v 3.3 v 3.2 v rx: 0.5 v tx: 0.6 v rx: 6.1 v tx: 4.2 v 0.7 v rx: 0 v tx: 5.0 v rx: 6.9 v tx: 0.5 v rx: 0 v tx: 2.0 v rx: 0 v tx: 6.9 v rx: 0 v tx: 1.4 v rx: 0.1 v tx: 0 v rx: 2.9 v tx: 0.4 v rx: 0.6 v tx: 0.5...
14 main unit note.
15 main unit parts layout (side a) b a d c e f h g i 1 2 3 4 5 6 7 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...
16 main unit parts layout (side b) b a d c e f h g i 1 2 3 4 5 6 7 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,...
17 parts list main unit ref description value v/w tol. Mfr's desig vxstd p/n vers. Lot side lay adr pcb with components cb3119006 ce:off, dst:usa2 cb3119007 ce:off, dst:exp2 printed circuit board ah023n000 fr013240e 1- c 1001 chip ta.Cap. 10uf 10v taja106m010y k78100072 1- b g5 c 1002 chip ta.Cap. 1...
18 parts list main unit ref description value v/w tol. Mfr's desig vxstd p/n vers. Lot side lay adr c 1078 chip cap. 0.015uf 50v b grm188b11h153ka01d k22174838 1- b e6 c 1079 chip cap. 150pf 50v ch grm1882c1h151ja01d k22174239 1- b e6 c 1080 chip cap. 560pf 50v ch grm1882c1h561ja01d k22174273 1- b e...
19 parts list main unit ref description value v/w tol. Mfr's desig vxstd p/n vers. Lot side lay adr c 1156 chip cap. 0.001uf 50v b grm188b11h102ka01d k22174821 1- a f6 c 1157 chip cap. 0.01uf 50v b grm188b11h103ka01d k22174823 1- a e3 c 1158 chip cap. 0.001uf 50v b grm188b11h102ka01d k22174821 1- a ...
20 parts list main unit ref description value v/w tol. Mfr's desig vxstd p/n vers. Lot side lay adr c 1244 chip cap. 0.001uf 50v b grm188b11h102ka01d k22174821 1- a g4 c 1245 chip cap. 10pf 50v ch grm1882c1h100ja01d k22174211 1- a g5 c 1248 chip cap. 39pf 50v ch grm1882c1h390ja01d k22174225 1- a h5 ...
21 parts list main unit ref description value v/w tol. Mfr's desig vxstd p/n vers. Lot side lay adr fb1007 ferrite beads bk1608hs121-t l9190081 1- b h1 j 1001 connector sc25-02ws p0090621 1- a a3 j 1002 connector hsj0836-0105009 p1091085 1- a a1 j 1003 connector 32flt-sm2-tb(lf)(sn)(m) p1091258 1- a...
22 parts list main unit ref description value v/w tol. Mfr's desig vxstd p/n vers. Lot side lay adr q 1051 transistor 2sc4617 tl r g3346178r 1- a g5 q 1052 transistor dtc143ee tl g3070114 1- a f6 q 1053 transistor 2sc4617 tl r g3346178r 1- a f6 r 1001 chip res. 3.3k 1/16w 5% rmc1/16s 332jth j2418903...
23 parts list main unit description value v/w tol. Mfr's desig vxstd p/n vers. Lot side lay adr ref r 1076 chip res. 390k 1/16w 5% rmc1/16s 394jth j24189056 1- a g5 r 1077 chip res. 22k 1/16w 5% rmc1/16s 223jth j24189041 1- a g5 r 1079 chip res. 2.2k 1/16w 5% rmc1/16s 222jth j24189029 1- a g5 r 1081...
24 parts list main unit ref description value v/w tol. Mfr's desig vxstd p/n vers. Lot side lay adr r 1156 chip res. 39k 1/16w 5% rmc1/16s 393jth j24189044 1- a f5 r 1157 chip res. 330k 1/16w 5% rmc1/16s 334jth j24189055 1- b d5 r 1158 chip res. 330k 1/16w 5% rmc1/16s 334jth j24189055 1- b c5 r 1159...
25 parts list main unit ref description value v/w tol. Mfr's desig vxstd p/n vers. Lot side lay adr r 1236 chip res. 2.2k 1/16w 5% rmc1/16s 222jth j24189029 1- a g5 r 1237 chip res. 680 1/16w 5% rmc1/16s 681jth j24189023 1- a g6 r 1238 chip res. 4.7k 1/16w 5% rmc1/16s 472jth j24189033 1- b b7 r 1239...
26 main unit note.
27 cntl unit circuit diagram 5.0 v rx: 4.8 v tx: 0.6 v 4.8 v rx: 4.8 v tx: 0.6 v 5.0 v 0 v 0 v 0 v 2.6 v 2.6 v 2.3 v 0 v 5.0 v 5.0 v 0 v 0 v 5.0 v 1.8 v 5.0 v 4.9 v 0 v 5.6 v 0.6 v 1.2 v 5.0 v 2.5 v 3.9 v 5.0 v 3.6 v 5.0 v 3.6 v 4.0 v 8.0 v 3.4 v 0 v 0 v 0 v 4.6 v 5.0 v rx: 13.1 v tx: 11.9 v rx: 13....
28 cntl unit parts layout (side a) b a d c e f h g i 1 2 3 2sc4617 (br) (q2007, 2008, 2013) 2sc5374 (na) (q2003) br24l64 (q2006) hd64f2266tf13 (q2002) b a d c e f h g i 1 2 3 s-812c50aua (q2010) dtc143ze (e23) (q2012) bd4830fve (q2011) dtc143ze (e23) (q2004) cph6202 (cb) (q2005) dan222 (n) (d2023) d...
29 parts list cntl unit ref description value v/w tol. Mfr's desig vxstd p/n vers. Lot side lay adr pcb with components cs2033409 ce:off, dst:usa2, typ:a2 cs2033410 ce:off, dst:exp2, typ:a1 cs2033411 ce:off, dst:exp2, typ:a2 cs2033412 ce:off, dst:exp2, typ:a3 cs2033415 ce:off, dst:exp2, typ:b3 print...
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 2009 led sml-512wwt86 g2071104 1- a d2 d 2010 led sml-512wwt86 g2071104 1- a e2 d 2011 diode 1ss400 te61 g2070634 1- b d1 d 2012 diode 1ss400 te61 g2070634 1- b d1...
31 parts list cntl unit ref description value v/w tol. Mfr's desig vxstd p/n vers. Lot … lay adr r 2039 chip res. 68k 1/16w 5% rmc1/16s 683jth j24189047 1- b a2 r 2040 chip res. 220k 1/16w 5% rmc1/16s 224jth j24189053 1- b a2 r 2041 chip res. 6.8k 1/16w 5% rmc1/16s 682jth j24189035 1- b a1 r 2042 ch...
32 note cntl unit.
33.
34 copyright 2009 vertex standard co., ltd. All rights reserved no portion of this manual may be reproduced without the permission of vertex standard co., ltd. Printed in japan..