background image

S.=Surface mount

IC250

1110002700 S.IC

NJM2904M-T1

IC851

1130007610 S.IC

µPD3140GS-E1 (DS8)

Q201

1530000371 S.TRANSISTOR

2SC3356 R25-T2B

Q202

1510000670 S.TRANSISTOR

2SA1588-GR (TE85R)

Q203

1590001140 S.TRANSISTOR

UN9210 (TX)

Q204

1590002730 S.TRANSISTOR

UN921L (TX)

Q250

1530002280 S.TRANSISTOR

2SC4081 T107 S

Q253

1590001050 S.TRANSISTOR

DTC114TUA T106

Q255

1520000430 S.TRANSISTOR

2SB1462-R (TX)

Q351

1530003310 S.TRANSISTOR

2SC5107-O (TE85R)

Q352

1530003310 S.TRANSISTOR

2SC5107-O (TE85R)

Q353

1590001690 S.TRANSISTOR

UN9115 (TX)

Q354

1590001140 S.TRANSISTOR

UN9210 (TX)

Q355

1560000540 S.FET

2SK880-Y (TE85R)

Q356

1530002280 S.TRANSISTOR

2SC4081 T107 S

Q357

1590001690 S.TRANSISTOR

UN9115 (TX)

Q701

1530000371 S.TRANSISTOR

2SC3356 R25-T2B

Q702

1520000460 S.TRANSISTOR

2SB1132 T100 R

Q703

1540000350 S.TRANSISTOR

2SD2216-S (TX)

Q704

1590001150 S.TRANSISTOR

UN9211 (TX)

Q705

1510000670 S.TRANSISTOR

2SA1588-GR (TE85R)

Q852

1530002560 S.TRANSISTOR

2SC4403-3-TL

Q853

1590001690 S.TRANSISTOR

UN9115 (TX)

Q854

1590001140 S.TRANSISTOR

UN9210 (TX)

D1

1790001260 S.DIODE

MA2S077-(TX)

D2

1790001260 S.DIODE

MA2S077-(TX)

D51

1790001260 S.DIODE

MA2S077-(TX)

D52

1790001260 S.DIODE

MA2S077-(TX)

D201

1790001260 S.DIODE

MA2S077-(TX)

D202

1790001260 S.DIODE

MA2S077-(TX)

D250

1730002260 S.ZENER

MA8030-H (TX)

D251

1790001010 S.ZENER

MA8043-L (TX)

D351

1790001260 S.DIODE

MA2S077-(TX)

D352

1790001260 S.DIODE

MA2S077-(TX)

D353

1790001260 S.DIODE

MA2S077-(TX)

D354

1790000840 S.DIODE

MA132WA (TX)

D551

1790001260 S.DIODE

MA2S077-(TX)

D552

1790001260 S.DIODE

MA2S077-(TX)

D701

1790001260 S.DIODE

MA2S077-(TX)

D702

1790000860 S.DIODE

MA133 (TX)

D703

1790001250 S.DIODE

MA2S111-(TX)

D722

1750000530 S.DIODE

1SV271 (TPH3)

D723

1790001260 S.DIODE

MA2S077

D724

1790001260 S.DIODE

MA2S077

D725

1750000530 S.DIODE

1SV271 (TPH3)

D901

1750000540 S.DIODE

RB060L-40 TE-25

X851

6050009430 XTAL

CR-515 (15.200000 MHz)

L1

6200007790 S.COIL

LQN21A R15J04

L2

6200008250 S.COIL

0.30-0.9-7TL 21N

L3

6200008760 S.COIL

0.26-0.9-9TR 30N

L5

6200004350 S.COIL

LL1608-F10NK

L6

6200004350 S.COIL

LL1608-F10NK

L7

6200008240 S.COIL

0.30-0.9-5TL 14N

L8

6200008850 S.COIL

0.40-1.1-6TR

L9

6200008770 S.COIL

0.28-1.0-5TR 16N

L10

6200005890 S.COIL

NLH252018T-039J 39N

L11

6200008830 S.COIL

0.20-1.0-12TL 60N

L12

6200005900 S.COIL

NLH252018T-047J 47N

L13

6200004480 S.COIL

MLF1608D R82K-T

L51

6200005910 S.COIL

NLH252018T-056J 56N

L52

6200005910 S.COIL

NLH252018T-056J 56N

L201

6200004480 S.COIL

MLF1608D R82K-T

L202

6200005930 S.COIL

NLH252018T-082J 82N

L203

6200003590 S.COIL

EXCCL3225U1

L204

6200003590 S.COIL

EXCCL3225U1

L205

6200004480 S.COIL

MLF1608D R82K-T

L206

6200005690 S.COIL

ELJRE 18NG-F

L352

6200003550 S.COIL

MLF1608A 4R7K-T

L353

6200003550 S.COIL

MLF1608A 4R7K-T

L354

6200004480 S.COIL

MLF1608D R82K-T

L355

6200004480 S.COIL

MLF1608D R82K-T

L551

6200008530 S.COIL

0.30-1.0-4TR 12N

L552

6200008530 S.COIL

0.30-1.0-4TR 12N

L701

6200004370 S.COIL

LL1608-F15NK

L702

6200005830 S.COIL

NLH252018T-012J 12N

L703

6200004380 S.COIL

LL1608-F18NK

L723

6200008080 S.COIL

LQN21A R22J04

L724

6200008080 S.COIL

LQN21A R22J04

L725

6200008080 S.COIL

LQN21A R22J04

L801

6200006980 S.COIL

ELJRE R10G-F

L900

6200003590 S.COIL

EXCCL3225U1

L901

6200003590 S.COIL

EXCCL3225U1

R1

7030007270 S.RESISTOR

ERJ2GEJ 151 X (150 

R201

7030004980 S.RESISTOR

ERJ2GEJ 101 X (100 

R202

7030007270 S.RESISTOR

ERJ2GEJ 151 X (150 

R203

7030005040 S.RESISTOR

ERJ2GEJ 472 X (4.7 k

R204

7030005530 S.RESISTOR

ERJ2GEJ 100 X (10 

R205

7030007340 S.RESISTOR

ERJ2GEJ 153 X (15 k

R207

7030005040 S.RESISTOR

ERJ2GEJ 472 X (4.7 k

R208

7030004980 S.RESISTOR

ERJ2GEJ 101 X (100 

R209

7030005040 S.RESISTOR

ERJ2GEJ 472 X (4.7 k

R210

7030004980 S.RESISTOR

ERJ2GEJ 101 X (100 

R250

7030007330 S.RESISTOR

ERJ1WRSJR15U (0.15 

)

R251

7030005070 S.RESISTOR

ERJ2GEJ 683 X (68 k

R252

7030005240 S.RESISTOR

ERJ2GEJ 473 X (47 k

R258

7030007340 S.RESISTOR

ERJ2GEJ 153 X (15 k

R259

7030005050 S.RESISTOR

ERJ2GEJ 103 X (10 k

R260

7030004980 S.RESISTOR

ERJ2GEJ 101 X (100 

R261

7030005160 S.RESISTOR

ERJ2GEJ 105 X (1 M

R262

7030005220 S.RESISTOR

ERJ2GEJ 223 X (22 k

R263

7030005050 S.RESISTOR

ERJ2GEJ 103 X (10 k

R264

7030007290 S.RESISTOR

ERJ2GEJ 222 X (2.2 k

R265

7030005040 S.RESISTOR

ERJ2GEJ 472 X (4.7 k

R266

7510001000 S.THERMISTOR

TBPS1R154K475H5Q

R267

7030007340 S.RESISTOR

ERJ2GEJ 153 X (15 k

R278

7030005530 S.RESISTOR

ERJ2GEJ 100 X (10 

R281

7030005120 S.RESISTOR

ERJ2GEJ 102 X (1 k

R282

7030005090 S.RESISTOR

ERJ2GEJ 104 X (100 k

R283

7030005090 S.RESISTOR

ERJ2GEJ 104 X (100 k

R284

7030007260 S.RESISTOR

ERJ2GEJ 330 X (33 

R285

7030005120 S.RESISTOR

ERJ2GEJ 102 X (1 k

R350

7030005120 S.RESISTOR

ERJ2GEJ 102 X (1 k

R351

7030009200 S.RESISTOR

ERJ2GEJ 390 X (39 

R352

7030005030 S.RESISTOR

ERJ2GEJ 152 X (1.5 k

R354

7030005220 S.RESISTOR

ERJ2GEJ 223 X (22 k

R355

7030007260 S.RESISTOR

ERJ2GEJ 330 X (33 

R356

7030005300 S.RESISTOR

ERJ2GEJ 150 X (15 

R357

7030005300 S.RESISTOR

ERJ2GEJ 150 X (15 

R358

7030004980 S.RESISTOR

ERJ2GEJ 101 X (100 

R359

7030005240 S.RESISTOR

ERJ2GEJ 473 X (47 k

R360

7030004990 S.RESISTOR

ERJ2GEJ 221 X (220 

R361

7030004970 S.RESISTOR

ERJ2GEJ 470 X (47 

R362

7030005100 S.RESISTOR

ERJ2GEJ 154 X (150 k

R363

7030005110 S.RESISTOR

ERJ2GEJ 224 X (220 k

R364

7030005110 S.RESISTOR

ERJ2GEJ 224 X (220 k

R365

7030007280 S.RESISTOR

ERJ2GEJ 331 X (330 

R366

7030005050 S.RESISTOR

ERJ2GEJ 103 X (10 k

R367

7030005030 S.RESISTOR

ERJ2GEJ 152 X (1.5 k

R368

7030005010 S.RESISTOR

ERJ2GEJ 681 X (680 

R369

7030005090 S.RESISTOR

ERJ2GEJ 104 X (100 k

R370

7030005050 S.RESISTOR

ERJ2GEJ 103 X (10 k

R371

7030007280 S.RESISTOR

ERJ2GEJ 331 X (330 

R372

7030005090 S.RESISTOR

ERJ2GEJ 104 X (100 k

R373

7030005240 S.RESISTOR

ERJ2GEJ 473 X (47 k

R374

7030005090 S.RESISTOR

ERJ2GEJ 104 X (100 k

R701

7030005040 S.RESISTOR

ERJ2GEJ 472 X (4.7 k

R702

7030005040 S.RESISTOR

ERJ2GEJ 472 X (4.7 k

R704

7030005530 S.RESISTOR

ERJ2GEJ 100 X (10 

R705

7030005050 S.RESISTOR

ERJ2GEJ 103 X (10 k

R706

7030004980 S.RESISTOR

ERJ2GEJ 101 X (100 

6 - 1

REF

ORDER

DESCRIPTION

NO.

NO.

[1F UNIT]

REF

ORDER

DESCRIPTION

NO.

NO.

[1F UNIT]

SECTION 6  PARTS LIST

Summary of Contents for IC-T7H

Page 1: ...SERVICE MANUAL DUAL BAND FM TRANSCEIVIER...

Page 2: ...IC T7H 1F UNIT 5pieces 8810008750 Screw PH BO 2 x 15 ZK IC T7H Chassis 10pieces Addresses are provided on the inside back cover for your convenience 1 Make sure a problem is internal before disassemb...

Page 3: ...CIRCUITS 4 4 4 5 OTHER CIRCUITS 4 4 4 6 PORT ALLOCATIONS 4 5 SECTION 5 ADJUSTMENT PROCEDURES 5 1 PLL AND TRANSMITTER ADJUSTMENT 5 1 5 2 RECEIVER ADJUSTMENT 5 3 SECTION 6 PARTS LIST SECTION 7 MECHANICA...

Page 4: ...174 MHz 1 136 MHz 174 MHz 1 400 MHz 470 MHz 3 F3 F2 5 ppm 5 10 12 5 15 20 25 30 or 50 kHz BNC 50 4 5 to 16 V DC 1 6 A typical 1 6 A typical 0 6 A typical 0 7 A typical 180 mA typical 190 mA typical 16...

Page 5: ...UHF band pass filter FI201 EFCH445MWN UHF RF amplifier Q201 2SC4226 Located under side of these points AF power amplifier IC151 2SC5226 VHF RF amplifier Q51 2SC5226 1st IF filter FI401 FL244 2nd IF f...

Page 6: ...n below REMOVING 2F UNIT 1 Unscrew 1 screw E from the 2F unit 2 Unsolder the point F then remove the 2F unit with the contact base Disconnect J1 on reverse side of the 2F unit to remove Rear panel C F...

Page 7: ...imit ter D201 and are then amplified at the the RF amplifier Q201 The amplified signals are passed through the band pass filter FI201 and are then applied to another RF ampli fier Q202 The amplified s...

Page 8: ...etects the signal level from the number of the pulses and outputs an MM RM signal from IC1 pin 44 on LOGIC unit This signal controls the AF mute switch LOGIC unit Q10 to cut the AF signal line 4 2 TRA...

Page 9: ...2 and Q204 are turned ON The signal passes through the low pass L7 L9 C9 C15 and high pass L1 L3 C1 C5 filters and is then applied to the antenna connector The high pass filter sup presses low harmoni...

Page 10: ...ltage is supplied to the 3C R3 and T4 regulator circuits etc Common 3 V converted from the VCC line by the 3C regulator circuit LOGIC unit Q4 Q5 Q40 and D3 using the 3CPU regulator LOGIC unit IC2 3 V...

Page 11: ...ow POWER switch is pushed Outputs LCD contrast control signals Input port for key matrix Input port for the PTT control circuit HIGH When transmitting Input port for reset circuit LOGIC unit IC3 pin 1...

Page 12: ...as HPF OFF LPF 20 kHz De emphasis OFF Detector P P 2 Output power High Transmitting Displayed frequency 445 000 MHz USA 3 435 000 MHz Other Output power High Transmitting Displayed frequency 445 000...

Page 13: ...QUENCY COUNTER 100 MHz 500 MHz 1F UNIT 2F UNIT RF POWER METER 10 W 50 FREQUENCY COUNTER 100 MHz 500 MHz R302 R304 VHF output power adjustment High UHF output power adjustment High ATTENUATOR 40 or 50...

Page 14: ...dBm Modulation 1 kHz Deviation 3 5 kHz Pre set the R504 to maxmum CW Receiving Displayed frequency 443 000 MHz USA 3 433 000 MHz Other Connect an SSG to the antenna connector and set as Level 0 5 V 1...

Page 15: ...R SSG 100 500 MHz 127 to 17 dBm 0 1 V to 32 mV CAUTION DO NOT transmit while the signal generator is connected L102 CP1 UHF sensitivity adjustment UHF sensitivity check point L53 L54 L55 VHF sensitivi...

Page 16: ...F15NK L702 6200005830 S COIL NLH252018T 012J 12N L703 6200004380 S COIL LL1608 F18NK L723 6200008080 S COIL LQN21A R22J04 L724 6200008080 S COIL LQN21A R22J04 L725 6200008080 S COIL LQN21A R22J04 L801...

Page 17: ...S CERAMIC C1005 JB 1E 102K T A C358 4030009810 S CERAMIC C1005 JB 1E 102K T A C359 4030009810 S CERAMIC C1005 JB 1E 102K T A C360 4030011600 S CERAMIC C1608 JB 1C 104KT N C361 4030009810 S CERAMIC C10...

Page 18: ...009780 S CERAMIC C1005 CH 1E 270J T A C302 4030010080 S CERAMIC C1005 CH 1E 240J T A C303 4030011670 S CERAMIC C1005 CH 1E 2R5B T A C304 4030011670 S CERAMIC C1005 CH 1E 2R5B T A C305 4030009810 S CER...

Page 19: ...17 7030005240 S RESISTOR ERJ2GEJ 473 X 47 k R118 7030005120 S RESISTOR ERJ2GEJ 102 X 1 k R119 7030004980 S RESISTOR ERJ2GEJ 101 X 100 R120 7030005220 S RESISTOR ERJ2GEJ 223 X 22 k R121 7030005240 S RE...

Page 20: ...30009810 S CERAMIC C1005 JB 1E 102K T A C406 4030009810 S CERAMIC C1005 JB 1E 102K T A C407 4030009810 S CERAMIC C1005 JB 1E 102K T A C408 4030009760 S CERAMIC C1005 CH 1E 150J T A C409 4030009810 S C...

Page 21: ...RJ3GEYJ 104 V 100 k R219 7030003840 S RESISTOR ERJ3GEYJ 225 V 2 2 M R220 7030003560 S RESISTOR ERJ3GEYJ 103 V 10 k R221 7030005520 S RESISTOR RR0816R 334 D 330 k R222 7030005970 S RESISTOR RR0816R 683...

Page 22: ...1005 JB 1E 102K T A C208 4030009810 S CERAMIC C1005 JB 1E 102K T A C209 4030009810 S CERAMIC C1005 JB 1E 102K T A C210 4030009810 S CERAMIC C1005 JB 1E 102K T A C211 4030009810 S CERAMIC C1005 JB 1E 1...

Page 23: ...PARTS REF NO ODER NO DESCRIPTION QTY J901 6450000130 Connector HSJ1102 01 540 MIC 1 J902 6450001060 Connector HSJ1493 01 010 SP 1 J903 6450000870 Connector HEC2711 01 020 DC13 5V 1 S1 7600000190 Encod...

Page 24: ...MP1 C MP8 C MP9 C MP21 C MP13 C MP13 C MP13 C MP12 C MP29 C MP1 1F MP2 1F J902 1F S1 1F J903 1F MP301 D J901 1F MP19 C MP24 C MC1 L W1 L J1 C J1 C LOGIC UNIT MP11 L SP1 L MP12 L MP13 L MP15 C MP401 P...

Page 25: ...mbol R25 2SC4228 R45 Symbol R45 2SC4403 3 Symbol LY3 2SB1132 R Symbol BARB 2SB1201 S Symbol B1201 2SB1462 R Symbol BR 2SC3356 R25 Symbol R25 TRANSISTOR AND FET S S D G B E C B E C B1 E B2 C1 C2 E1 E2...

Page 26: ...SECTION 9 BOARD LAYOUTS 9 1 DS1 DS4 MC1 DS3 DS2 C91 C92 C93 S1 C81 C80 C83 C82 9 1 LOGIC UNIT TOP VIEW...

Page 27: ...C157 D19 C207 R207 Q4 C141 Q12 Q10 Q40 C208 R12 C19 C15 C169 C170 C180 Q45 C172 C178 R216 R240 R215 R213 R214 R242 R187 C179 C181 C154 R181 R186 C206 R241 R211 C171 D3 IC13 IC12 HD17 D13 D16 D7 D14 C1...

Page 28: ...Q305 R306 MOD S B5216A C414 C415 C922 FI101 800 300 AF MOD EXTMIC SPE INTSP AFON PLST PLCK PDA UL REMOTE DICK DIUD AM UR3 VR3 LVCO 3C HVCO TXC SHIFT VCC H L TXSEL DETO NOISE SD GND GND 30 1 TO LOGIC U...

Page 29: ...117 R116 R118 R119 R122 C121 C12 Q104 Q102 C124 C923 Q103 Q105 C106 D402 D401 C11 Q4 Q5 C123 C126 R5 C122 C413 C406 C406 C405 R408 R406 C402 C400 R612 R402 C416 C67 C65 R59 C63 C61 R101 R102 R110 R112...

Page 30: ...C380 R374 C376 C377 C379 C378 L355 Q356 L353 C554 C553 R210 D552 D201 D51 D351 D52 VRF GND GND 800M GND URF C101 Q253 C910 C102 S1 J904 J904 L900 1 C861 R362 R363 R863 R862 J903 C865 UOUT GND VOUT GN...

Page 31: ...C7 IC250 C371 C370 C904 C906 R365 C8 D1 C551 C15 C13 C14 C552 D551 C5 C4 C2 C3 C9 L2 L7 L8 L9 L724 L723 L551 L3 C10 C12 R728 R721 C724 C728 R726 R727 C911 C730 C727 R724 R262 R267 C214 R704 R708 R278...

Page 32: ...3 IC151 TA7368F 2F UNIT TO BATT VCC Q10 2SJ364 Q12 XP6501 CTCIN R3 5 IC13 NJM2904M IC12 BA4510F VCC R3 REG 3C 3C VCC MIC AMP MUTE SW IC12 BA4510F Q31 UN9211 D901 RB060L 40 HV REVERS VOLT PROTECT MC1 E...

Page 33: ...C201 0 001 C202 0 001 C216 0 001 C217 0 001 R216 1 M R211 470 k R215 82 k R214 82 k R213 82 k 1 5 6 7 8 IC13 NJM2904M R241 100 k C181 0 01 C180 0 1 C172 0 1 R219 2 2 M C173 0 0022 C169 0 0015 C170 0 1...

Page 34: ...R250 0 15 D250 MA8030H C235 0 001 C2360 001 C234 0 001 R251 68 k R252 47 k 1 2 3 4 6 5 7 8 IC250 NJM2904M R265 4 7 k R261 1 M R264 2 2 k C254 0 001 R267 15 k R263 10 k Q255 2SB1462 R C231 0 001 C232...

Page 35: ...1 MA2S077 C56 0 001 R51 68 k D52 MA304 Q51 2SC5226 4 C58 0 001 R52 100 k C59 0 001 R53 68 L53 LS 518 VRF C55 0 001 C54 10 P D55 1SV271 C69 9 P C57 12 P R57 33 k C60 0 001 R56 10 k R55 330 R54 100 Q52...

Page 36: ...Australia Phone 03 9387 0666 Fax 03 9387 0022 Unit 9 Sea St Herne Bay Kent CT6 8LD U K Phone 01227 741741 Fax 01227 741742 URL http www icomuk co uk Zac de la Plaine Rue Brindejonc des Moulinais BP 58...

Page 37: ...6 9 16 Kamihigashi Hirano ku Osaka 547 0002 Japan A 5551I S Printed in Japan 1998 by Icom Inc...

Reviews: