Icom IC-400PRO Service Manual Download

Page: 34 / 36

VOLTAGE LINE

Explanatory notes

TX LINE

RX LINE

COMMON LINE

R65

220

C101

0.001

L20
27n

R66
100k

MAIN
UNIT
(1)

BUS LINE2

C110

470p

L41

27n

R75

150k

C105

0.001

Q12
2SC5107

R8V

C104

0.001

R74

100k

R72

470

R76

220

R73

100

C109

0.001

C102
12p

R71

Q11
2SC5107

C301

470p

R234

47k

L21

22n

Q10
2SC5107

C100
10p

D14
1SV307

D15

MA77

C93

C98

R69

4.7k

R50

100

R235

10k

C303

0.001

R70

C108

T8V

R8V

0.01

R68

10k

R67

100

R362

22k

C99

0.001

Q8
2SC3356

Q9
2SC5107

L37

0.1

R306

C92
7p

C331
0.5p

L18
15n

C90

C89

C106

47p

C375

39p

C376

180p

C107

0.001

R61

L19

27n

C96

0.001

C97

47p

VCC1

VCC2

OUT

IC3

T8V

RA30H4452M-21

1 2 3 4

EP3

C86 47p

C87 0.001

C342 2.2

C84 47p

C85 0.001

C91 22

C328 47p

C329 0.001

C334 7p

C335 12p

C336 22p

C344 0.001

C345 470p

C346 47p

C360 0.001

C361 470p

C362 47p

FI4
NFM60R-
20T152

FI3
NFM60R-
20T152

L16
AS080340-15N

C82

C83

D2
UM9401F

C12

470p

C16
2p

100

C13

47p

R308

2.7k

C14
47p

L3
AS100340-10N

L2
AS080340-15N

C9 4p

C8 1p

C6 1p

10p

R6
10k

R5
10k

0.001

100

R3
47

C10

0.001

C11

0.001

D11

MA728

100

0.001

100k

L1
AS080340-15N

C352

FI1

R8V

T8V

R8V

VCC

T8V

VCC

T8V

CPU5V

AFO

FL-335

C56

22p

C55

R31

100

C57

0.001

L13

0.27

C51

0.001

R32

C52

39p

C53

0.01

C54

0.001

R29

150

C50

0.001

C48

22p

Q3
3SK299

C49
5p

L38

C40
0.5p

22n

L12

33n

R25

4.7k

C364

R30

C363

C302

C44

1.5p

L11

12n

D10

HVC350B

C45

R23

220k

C43

0.001

R21

220k

C39

HVC350B

C42

0.001

R22
10k

C339

0.5p

R20

Q2
3SK293

C32

0.001

C333

47p

R16

330

R15

47k

C30
5p

12n

C29

1.5p

C33

47p

C34

0.001

R19

56k

R12

R17

C37

0.001

12n

C343
0.001

R18
10k

C35
0.1

C38

0.001

R10

1.8k

R207

220k

D25

MA2S111

R206
470k

RSSI

R14
10k

R11

220k

C20

C18

C27

0.001

C28

0.001

HVC350B

C26

R13

220k

R323
220k

D43
HVC350B

HVC350B

12n

C21 1.5p

C393 1.5p

C25
2p

L31

33n

L43

33n

C372

68p

C19
0.001

D7 MA728

D5 UM9401F

L17

10n

C94

C389

L42

6.8n

C370

1.5p

C15

23.2n

3
1

C79
0.22

R56
150k

R59

120k

IC2
TA75S01F

R51

470k

C76

0.01

C81

0.001

C77

0.001

R58
100

C80

0.0047

R52

150k

R54 10k

C78

0.001

R57
10k

C73

D28
MA2S111

R55
1k

C88

47p

TMUT

+
-

IC16
NJM12902V

C324
470p

R251
470k

R250
100k

C327

CPU5V

+
-

5
6

IC16
NJM12902V

C322

0.01

R249
22k

R248
22k

C320

0.039

R247
22k

DET

R252
470

C325

0.001

R246
1.5k

C319

0.047

IC16
NJM12902V

R245

180k

C318

0.1

C317

820p

R243
82k

R244

390k

C316

820p

C315

DET

0.022

R241

100k

R242
39k

R240
100k

SDEC

CDEC

R315

100k

C243
0.0047

C245
0.1

R304
22k

R232

39k

C280

0.01

R305

BEEPO

BEEP

BEEPO

BEEP

R192

220k

C250

0.1

1
3

R191

220k

R194
2.2k

C249
0.0022

R193
470k

R159

10k

R195
2.7k

C251
0.047

R287
10k

C244

0.47

Q35
DTC363EK

C351

0.047

C379

39p

R196

10k

IC15
TA75S01F

R197
10k

C253
0.022

1
2

C252
0.1

C255

470

R198

10k

R199

10k

C256
470

C254

0.001

C381

180p

Q36
DTC144EU

AFON

AFO

D23
DA221

C269

0.001

Q29
DTC114TU

TMUT

R203

3.3k

R202

3.3k

R208

3.3k

C272

Q25

Q23
2SJ377

2SD1664

C271

C270

0.001

Q26
2SA1577

Q30
DTC144EU

RXC

R204
4.7k

R205
10k

R218

22k

R217

22k

C274

C273

0.001

Q27
2SA1577

R156
4.7k

IC8
LA4425A

C266 10

C262 0.1

IC9
TA7808F

C261 0.1

R201

470

R200
10k

C260 47p

C259 0.001

C258 470

D22 DSA3A1

IC10
AN78L05M

C264 0.1

C268 10

C263 0.1

C276

0.001

C275

0.001

Q24
DTC144EU

PWON

Q33
DTC144EU

Q39
DTC144EU

DIM

BATV

R238
100k

C293

0.001

C378

39p

C294

0.001

C380

39p

C291

0.001

C290

0.001

C292

47p

C390

0.001

C383

22p

C382

39p

C392

0.001

C384

12p

C385

C391

47p

47k

C288
0.1

C289
0.1

R225
10k

R224
47

R223
1k

DET

EPTT

R228

100k

C246
0.1

D29

MA2S111

R229

Q31
2SJ144

R227

C295
10

R230
1k

R322
1

SIG

SIGO

EP4

EP5

+
-

CHASSIS
SP1

VCC
GND
DIM

HORN

GND

AFO

GND

DISC

GND

PTT
GND

to
OPC-617

BUS LINE1

C103

L5 1

C36

0.001

C386

180p

C387

180p

C41
15p

Q1
2SK1829

C22
0.5p

GND

V+

IC16
NJM12902V

C349

0.1

C321
0.1

Q28
XP6501

R298

VCC

CPU5V

VCC

CPU5V

100k

R297

300k

HORNO

R226
100k

D26
MA2S111

VCC

MAIN UNIT (2)

R53

560

6.4V

6.8V

TX: 6.3V
RX: 0V

TX: 3.0V
RX: 0V

TX: 2.3V
RX: 2.2V

TX: 0V
RX: 3.0V

TX: 0V
RX: 2.4V

TX: 0V
RX: 3.6V

TX: 0V
RX: 0.5V

6.0V

TX: 0V
RX: 7.4V

TX: 0V
RX: 0.8V

MEASUREMENT CONDITIONS
VOLTMETER
Amplitude(Oscilloscope) : 100 MHz
Frequency : 465 MHz
Transmission : 25 W

TX: 3.8V
RX: 0.2V

TX: 2.4V
RX: 2.0V

TX: 0V
RX: 4.8V

AF ON: 4.5V
OFF: 0V

TX: 7.9V
RX: 0V

TX: 0V
RX: 7.8V

7.9V

5.0V

13.2V

POWER ON: 4.9V
OFF: 0V

4.4V

11 - 3

Summary of Contents for IC-400PRO

Page 1: ...UHF TRANSCEIVER i400PRO SERVICE MANUAL...

Page 2: ...ttom cover 10 pieces Addresses are provided on the inside back cover for your convenience REPAIR NOTES 1 Make sure a problem is internal before disassembling the transceiver 2 DO NOT open the transcei...

Page 3: ...CIRCUITS 4 4 4 5 PORT ALLOCATIONS 4 4 SECTION 5 ADJUSTMENT PROCEDURES 5 1 PREPARATION 5 1 5 2 PLL ADJUSTMENT 5 4 5 3 SOFTWARE ADJUSTMENT 5 5 5 4 TRIMMER ADJUSTMENT 5 7 SECTION 6 PARTS LIST SECTION 7 M...

Page 4: ...permissible deviation 2 5 kHz Narrow 5 0 kHz Wide Frequency error 2 5 ppm Spurious emissions 30 dBm 25 W 74 dBc 5 W 67 dBc Adjacent channel power 16 dBm 25 W 60 dBc 5 W 53 dBc Narrow 22 dBm 25 W 66 dB...

Page 5: ...K D A converter IC6 M62363FP 650C IF IC IC1 TA31136FN 1st IF filter FI1 FL 335 Located under side of the point Final FET module IC3 RA30H4452M 21 CPU 5V regulator IC10 AN78L05M 8V regulator IC9 TA780...

Page 6: ...the front unit B C D A J2 J7 y Unscrew 8 screws F u Remove the filter case G i Unscrew the screw H o Unsolder 3 points I from the antenna connector 0 Unsolder 5 points J from IC3 F G H I J 1 Lift up...

Page 7: ...signals to a fixed frequency of the 1st IF signal with the PLL output frequency By changing the PLL frequency only the desired frequency will pass through a MCF Monolithic Crystal Filter FI1 at the n...

Page 8: ...AF signals even when noise squelch is open A portion of the AF signals from the FM IF IC IC1 pin 9 passes through the low pass filter IC16 to remove AF voice signals and is applied to the CTCSS or DTC...

Page 9: ...refer ence frequency The PLL output frequency is controlled by the divided ratio N data of a programable divider The PLL circuit contains the TX RX VCO circuit Q13 Q14 The oscillated signal is amplifi...

Page 10: ...the key matrix Output ports for 5 2 tone and DTMF signals Input port for the PLL unlock signal from the PLL IC MAIN unit IC4 Input port for the key matrix Output ports for CTCSS DTCS signals Input por...

Page 11: ...level detection Input port for the PLL lock voltage 44 46 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 OPT3 OPT1 SI CLI CLO POSW DIM NOIS CIRQ CCS PTT EPTT HANG AFVI CDEC SDEC OV12 RSSI LVIN Pin...

Page 12: ...iate CD drive e Select Run from the Start menu r Type the setup program name using the full path name then push Enter key ex D CS400PROADJ Setup exe t Follow the prompts y Program group CS 400PRO ADJ...

Page 13: ...eter DC voltmeter GRADE AND RANGE Output voltage 13 8 V DC Current capacity 10 A or more Measuring range 1 50 W Frequency range 300 600 MHz Impedance 50 SWR Less than 1 2 1 Frequency range 0 1 600 MHz...

Page 14: ...00 V CTCSS 174 AEh 3 41 V SQL Lev 0 00h 0 00 AGC 255 FFh 5 00 V CH No 01 RX Freq 136 200000 TX Freq RF Power High Mode Wide Transceiver s connection state Reload adjustment data Receive sensitivity m...

Page 15: ...VOLTAGE 1 2 3 4 Operating freq 450 000 MHz Receiving Output power Low1 Transmitting Operating freq 500 000 MHz Receiving Output power Low1 Transmitting MAIN Connect a digital multi meter or an oscill...

Page 16: ...er Low1 Transmitting IF bandwidth Narrow Transmitting Operating freq 500 000 MHz Output power Low1 IF bandwidth Wide CTCSS 67 Hz DTCS code 007 Set the FM deviation meter as HPF OFF LPF 20 kHz De empha...

Page 17: ...iving Operating freq 450 000 MHz IF bandwidth Wide Connect an SSG to the antenna con nector and set as Frequency 450 000 MHz Level 14 V 84 dBm Modulation 1 kHz Deviation 3 5 kHz Receiving Set an SSG a...

Page 18: ...too soft BE CAREFUL 5 tone calling beep sound becomes loud or soft when beep volume adjusts to loud or soft BEEP VOLUME 1 Operating freq Any Receiving FRONT Push any button except POWER switch then ve...

Page 19: ...B R73 7030005050 S RESISTOR ERJ2GEJ 103 X 10 k B S Surface mount R74 7030005050 S RESISTOR ERJ2GEJ 103 X 10 k B R75 7030005050 S RESISTOR ERJ2GEJ 103 X 10 k B R76 7030005120 S RESISTOR ERJ2GEJ 102 X 1...

Page 20: ...DE MA2S111 TX B D21 1750000830 S VARICAP HVC362TRF T D22 1790000700 DIODE DSA3A1 B D23 1750000370 S DIODE DA221 TL B D25 1790001250 S DIODE MA2S111 TX B D26 1790001250 S DIODE MA2S111 TX B D28 1790001...

Page 21: ...Surface mount 6 3 REF ORDER DESCRIPTION M NO NO M Mounted side T Mounted on the Top side B Mounted on the Bottom side MAIN UNIT R134 7030003650 S RESISTOR ERJ3GEYJ 563 V 56 k T R135 7030003690 S RESIS...

Page 22: ...1608 JB 1H 102K T T S Surface mount 6 4 REF ORDER DESCRIPTION M NO NO M Mounted side T Mounted on the Top side B Mounted on the Bottom side MAIN UNIT C67 4030006860 S CERAMIC C1608 JB 1H 102K T B C69...

Page 23: ...1608 CH 1H 030B T B C309 4030006900 S CERAMIC C1608 JB 1H 103K T B C310 4030006860 S CERAMIC C1608 JB 1H 102K T B C311 4030006860 S CERAMIC C1608 JB 1H 102K T B C314 4030006900 S CERAMIC C1608 JB 1H 1...

Page 24: ...002510 LCD L2 0607TAY 1 EP2 8930059170 LCD contact SRCN 2622 SP N W 1 MP2 8510015290 2623 F shield 1 MP3 8930058840 Shield sponge T 1 FRONT UNIT ORDER NO REF NO DESCRIPTION QTY J4 6450000140 Connector...

Page 25: ...AIN UNIT C CHASSIS PARTS EP2 F MP6 C MP7 C MP3 C SP1 F MP17 C MP11 C MP7 M MP1 C J1 C MP10 C MP2 C MP14 C R14 F J1 F MP13 M J4 M W2 M MP8 M MP2 M MP6 M MP3 M MP9 C MP13 C MP4 M MP5 M MP9 C MAIN UNIT M...

Page 26: ...44EUA T106 DTC363 EK XP1214 XP6501 AB Symbol HQ Symbol R25 Symbol AB B E C 2SC4116 BL Symbol LL Symbol QO Symbol R25 Symbol MFO Symbol DAQ Symbol VG Symbol 4L Symbol XY Symbol K1 Symbol UF Symbol U73...

Page 27: ...SECTION 9 BOARD LAYOUTS 9 1 FRONT UNIT TOP VIEW 8V 1 to Microphone 7 2 8 J1 AFO MICE GND CLO PTT MIC CLI 9 1...

Page 28: ...24 13 12 36 37 25 1 7 14 8 17 32 33 48 49 8 5 1 4 64 1 39 2 to MAIN unit J2 40 J2 DIM DAST OPT3 OPT2 OPT1 PTTO PTTI REM SCK SI SO CIRQ CCS MIC EPTT NC BEEP PWON 8V GND GND TONE TENC NOIS EXOE EXST UNL...

Page 29: ...GO OPT1 OPT2 OPT3 GND DAST OV12 OV12 DIM 40 2 39 to FRONT unit J2 1 J2 DAST OPT3 OPT2 OPT1 PTTO PTTI REM SCK SI SO CIRQ CCS MIC EPTT NC BEEP PWON 8V GND GND TONE TENC NOIS EXOE EXST UNLK PLST CDEC SDE...

Page 30: ...SP 14 8 1 1 7 14 8 7 16 9 1 8 12 24 1 13 9 4 BOTTOM VIEW MAIN UNIT...

Page 31: ...107 Q11 BUFF 2SC5107 Q10 BUFF J4 SP POSW R14 D29 MA2S111 Q36 DTC144EU Q35 DTC363EK MUTE AF LA4425A IC8 AMP AF TA75S01F IC15 AMP PRE D23 DA221 Q29 DTC114TU Q25 2SD1664 REG T8 TA7808F IC9 REG 8 Q28 XP65...

Page 32: ...4 IC5 NJM12902V C28 0 1 9 10 IC5 NJM12902V 8 C84 47p R44 150k C27 270p C76 0 1 C41 0 001 R43 33k R42 39k C25 0 01 C26 0 1 R41 10k R40 47k R81 100k R80 100k J1 8V 8V CLO AFO PTT MICE MIC GND CLI C81 0...

Page 33: ...0 1 R210 100K TEMP C350 1 R291 100k MOD F C337 0 001 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 IC1 TA31136FN OSCIN OSCOUT MIXOUT VCC IFIN DEC FILOUT FILIN MIXIN GND N REC N DET RSSI IFOUT QUAD AFOUT R44...

Page 34: ...78 0 001 R57 10k T2 C73 1 D28 MA2S111 R55 1k C88 47p TMUT 10 9 8 IC16 NJM12902V C324 470p R251 470k R250 100k C327 10 5V CPU5V 8V 5V CPU5V 8V 5V CPU5V CPU5V HV CPU5V 8V CPU5V 8V 5V CPU5V 5V 5V CPU5V 8...

Page 35: ......

Page 36: ...1 1 32 Kamiminami Hirano ku Osaka 547 0003 Japan S 14003HZ P2 C 2003 Icom Inc...

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