Icom IC-F40GT Service Manual page 41

SECTION 12 VOLTAGE DIAGRAM
DS3
LNJ310M6URA
DS4
LNJ310M6URA
DS10 EDMMUD1FA0
LCD
DS3
13.1V
J2
DS4
5.0V
10.3V
C19
C11 R6 0.1
390k
1
C6
C7
1
1
C21
C9
1
R7
1
560k
C8 D4 R5
C10
R18 C26
820k R3
1 1 MA111
100k
0.1
22
C20
47p
DS11
C3
C1 R4
LN1371G- C4 C23 0.1
0.1 820k
[GT] only C2
1 1
f =41 kHz
0.1
5V C22
0.1
DS6
0V D7
LN1371G-
[GT] only D6
D5
D4
R17
D3
100k
DS7
D2
LN1371G-
D1
[GT] only
D0
RDB
WRB
RS
DS12
LN1371G-
RESB
[GT] only
VCC
S5 S4 S3 S2
F3 F2 F1 F0
D1
MA111
KS4
S110 S103 S102 S101
C18
47p
KS3
DS14
LN1371G-
C12 [GS] only
S111 S106 S105 S104
47p
D2
MA111
KS2
C13
S112 S109 S108 S107
47p
DS15
LN1371G- Q2
[GS] only
2SC4116
KS1
C14
S16 S12 S11 S10
47p
R9
220
KS0
C15
47p
INT SP
CP1
SP1
C17
47p
CP2
Note
PTT
S1
PTT
R23 10k
Q8
INT MIC
2SC4081 Q6
CPH3403
R20
R21
470k
R22
Q7
100k
470k
MC1 CPH3403
R12 C25
EM-140
33k 47p
C16 Q9
INT SP : 0V RX: 0V
0.001
DTC144EUA
EXT SP: 4.8V TX : 2.7V
R60
100k
R13 R8
330 560
DS2
LNJ310M6URA
DS13 DS5
LNJ310M6URA LNJ210C6ARA
DS1
LNJ310M6URA
SQL CLOSE: 0V Q3
SQL OPEN : 5.0V
DTC144TE
Q1
2SC4116
Q4
R1
3.3k DTC144TE
R2
1.5k
J1
RX: 0V J3
TX: 5.0V W5
26 GND GND 1
2
25 +5V +5V
3
24 D7 D7
23 D6 D6 4
5
22 D5 D5
21 D4 D4 6
7
20 D3 D3
19 D2 D2 8
18 D1 D1 9
10
17 SPCN SPCN
16 RDB RDB 11
15 WRB WRB 12
14 13
RS RS
13 GND GND 14
12 RESB RESB 15
11 VCC VCC 16
10 KR0 KR0 17
9 KR1 KR1 18
8 KR2 KR2 19
7 KR3 KR3 20
6 FRST FRST 21
5 MIC+ MIC+ 22
4
D0 D0 23
3 SP+ SP+ 24
2 PTT PTT 25
IC1
1 GND GND
26
TC74VHC373FT
R14
100k
CH SELECT
EC10SP16-47
DS8
S1
Q5
LN1371G-
3
[GT] only DTC
1
C1
1 4
144TE 2
2 5
LED OFF: 0V
4
C2
DS9 LED ON : 5.0V 6
8
LN1371G-
[GT] only
R11
INT SP SW
3.3k
R193
AF VR
10k
POWER
R10
1.5k
D31
MA111
D3
MA6S121
R192
100k
R380
1k
D38
KR0
MA111
UNIVERSAL
KR1
CONNECTOR MP6
KR2
KR3 9
AFO
SP+
8
VCC
7
DETECT
6
MICE
5
RESET
[GT]: IC-F40GT/F41GT
4
XRXD
3
XTXD
[GS]: IC-F40GS/F41GS
2
MIC
1
PTT
PTT
MIC+
W3
Explanatory notes
C29
C28 IC2 R26
+B LINE
0.01 0.001 15k
TA75S01F
5
1
COMMON
4
3 R27
C30 LINE
R25 2 12k
0.1
C27
180k
TX LINE
270p
RX LINE
RX: 0V
R24
TX : 2.2V
SPCN
47k
CP3
HV
C24 CP4
FRONT UNIT BATTERY GND
0.01
CP5
BDET
R294 47k OPV11
R295 47k OPV12
OPV13
R296
To optional unit 47k
OPT1 J1
1 30
+5V
2 29
3 28
4 27
5 26 D10
DAN202U
6 25
7 24
8 23
D
9 22
10 21
F
11 20
12 19
13 18
14 17
15 16
To optional unit
OPT2
J2
1 30
PTOT 2 29
3 28
4 27
5 26
6 25
7 24
SIG2 8 23
OPT21 9 22
OPT22 10 21
OPT23 11 20
R64 12 19
FCLR
OPV23 47k 13 18
14 17
R65 15 16
47k
MSKE OPV22
R66
47k
RGS2
OPV21
D13
DAP202U
+5V
D7
D6
D5
D4
D14
D3 DAP202U
D2
D1
RDB
WRB
RS
RESB
VCC RX: 4.9V
TX: 0V DSIN
KR0
KR1
G
KR2
PTIN PTOT
KR3
FRST C310
C231
0.0047 47p
D0
R289
100k
R323
100k
VCC
SPCN
MCOT
MCIN
AFOUT
C234
PTIN
47p
CB10
CB11
CB12
CB13
C430
470p
R217
470
C365 C366 C367 C401
47p 47p 47p 47p
AFVI
VCC
HV
IC28
C354
F1
C414 C357
TC7W53FK 0.001
KAB
0.1 47
2402322NA29
8 1
7 2
6 3
5 4
R330
4.7
IC19
TC7W53FK
8 1
R375
7 2
4.7k
C356
6 3
47p
5 4
INT SP: 0V
R285 10k
EXT SP: 4.4V SPCN
AFOUT
C355
0.001
R277 1k R325
R278 1k
10k
RES
R279 1k
XRXD
XTXD
R280 1k
MD2
C451 D30 R284 C452 D35 D36
0.1 MA8062 M 0.1 MA8062-M MA8062-M
1k
D34
MAPD
MA8062-M
ADSL
CTCS
AN1
IC25
R347
1.2k
TC7W53FK R348
R346 DSIN
1.2k
1.2k
8 1
7 2
6 3
5 4
TMPS
VOXI
L56
BLM21P300SN1D [F41G] only
C359 C358
R333
470p
0.001
100k
except [IS] except [IS]
BDET
VOXT
L49
1µH
BUSY VCC
AUX
T5V
SIG1
REF
OPT11
+5V
OPT12
C424 R336 C105
OPT13 R54 R52 100
4.7
27k 0.001
APST 100 4 3
X1
DIN C104
CR-667
RGS1 R361 56k 0.1 15.600 MHz
BIAS C106
IC2
0.1
C103
R55 22k 5 TC75S51F
1
SPLO 10p
4
C107
3
FRCN 47p
R53
1 2
2
220k
BEP1
LVIN
+5V
PLRS
AFON
C108 R58 1k R57
47p R59 2k
SCK 2k C99 47p
1
CLOCK
SO 2
DATA
PLST 3
STROBE
ULCK 4
VSS
5
C95 RFIN
6
C91
SO 47p RFIN
7
0.1 VCCP
8
REFIN
SCK L29 9
C98
RA
154nH 10
0.01 AUXIN
VCC
R67
R63
+5V C90 C89 C88
100k
56 S5V L28
6p 0.001 R62
6p
1.8µH
1.2k
REM T5V
C87 L27 C86 C85
BEP2
S5V 3p 0.82µH 5p 4p
VCOS
+5V
R5V R5V
C
DSIN
R5V
E FI2 SFPCA450KE4A
W/N FILTER
2
1
D15 3 D16
DAN202U R81 DAN202U
FI3 SFPCA450KG1A
4.7 R82
2
1
15k
CCS
CIRQ
3
R77
SI
15k
R73 R86 C112
R78 R79 R80
+5V 470p
100k 22k 12k 22k 150k
R88
RMUT
22k
C110 R342
R75
R83
0.1 3.3k
100k +5V [F40G] only
39k
MMUT C111
R87
RX:0.1V
R85 820 0.001
Q16
100k
TX: 4.6V
DTA144EUA
S5V
C399 0.0047
C216 C397
A
0.047 0.0047
C398 0.0047
R172
R168
68k
R187 39k
4.7k
C227 C226
0.033 0.047
Q27
R189
470 AF FIL
2SC4213
R186
R184
68k
R288
12k
C230
+5V 10
Q45
R188
UN911H 100k
VCC
R185
120k
L47 B
1.0µH
MCOT
MCIN
C426
C425
0.1
R190 0.1
C416
100k
Q46 0.1
D40
R298 C427
MA742
DTC144EUA 100k 47p
VCC
S5V
+5V
R5V
T5V
C235 C237 C238
VCC RX: 5.0V R198
RX: 0.4V
22
22 22 TX: 0V
R196 10k
TX: 5.0V
10k
Q29 Q30 Q31
2SA1362 2SA1362 2SA1362
RX: 0.8V
0.9V
R195 TX: 5.0V R197 R199
RX: 5.0V
4.7k 4.7k
+5V 4.7k
TX: 0.8V
C240
C239
DC SW
0.01
0.01
RX SIGNAL
DSIN
S5V
C446 820p
R363
IC31
100k
R365 R366
TC75S51F
R367
39k 82k
R276 5
1
1.5k
4
47
3
C445
R364
C447 2
0.022 100k C448
C353
820p 0.047
0.001
R368
R369
390k
180k
R362 C449
R312
6.8k [H] 0.1 22k
8.2k other
C393 R313
1
33k
TX SIGNAL
R5V
R206 100 R207 C252
C251
22k 470p
R210 390k 2.2
VOX
C248 C249
D29
0.018 0.018 5
1
1SS355
4
3
C250
R209 IC18
R212
R208 470p R211 2
C253
330k 1.8M
15k 1.2k TA75S01F
0.001
MAIN UNIT
12 - 1
15.6 MHz 880 mVp-p
R48
C100 10k
R50
LV
1k 0.001
CP7 Q14
R337
1k 2SK880
C102
FLAC N PLL
C101 R49
R51 0.0047
C463
0.001 47k
10k
47p [F41G] only
C109
0.1 R46
+5V
12k
L25
1.8µH R43
VDD 20 2k
TEST 19
LOCK 18
IC1 RF 17
C74
R45 R44
RN 16
0.047
SA7025 10 3.9k
VDDA 15
PHP 14 C78
DK-T
PHI 13 0.001 C76
R47
VSSA 12
20K 100p
C77
PHA 11 C80
0.33
0.1
C81
R377
C83 R61 47p C79 × 3 MULTI
L26
120k R42
0.01 680k 0.001
1.0µH
10
C82
10p
R378
C84
4p 47k
Q15 2SC4081
+5V
R90 R91
R89
47 10k
1.5k IF
IC3 TA31136FN C124
X2
C125 R96
10
100p 2.2k CDBCB450KCAY24
1 16
OSCIN MIXIN
2 GND 15
OSCOUT
3 14
C113
MIXOUT N-REC
4 N-DET 13
0.01
VCC
5 12
C123
IFIN RSSI
6 11 100p
DEC IFOUT
7 10
FILOUT QUAD
8 9
FILIN AFOUT
L48
C114 C117
L42
1µH
0.1 0.001 C118
C115 Q17 1.8µH
0.001
0.001
2SC4081
R94
1.2k
R92
R93
47k C116
47k
470p
R317
470k
C194
R183 1.5k R175
C217
5 0.0047
1 5.6k
0.1
4
C225 0.047 3 C218
IC10 0.0047
2
TA75S01F
C232 0.0022
10 C455
0.1
C203 R166
0.0022
10
R370
R371 47k
Q47 22k
2SC4081 R
C456
R373 R372
C233 0.1
4.7k 33k
0.1
VCC
5.0V
5.0V
Q32
2SB1132
REG
R203
10k
6 5 4 5.0V
Q33
IC12
XP6501 7.5V
AN8005M
R202
CPU5V VCC
1 2 3 1k
R200
10k O
I
G
R201
C241 C242
C243
2.2k
0.01 4.7 C244 C246
47
0.001 0.001
C247
S5V
10
IC17
LC73872M
C450
0.1
+5V
1 VDD 14
INPUT
2 13
C254
NC NC
L45
4.7 3 EST 12
1.8µH PD
4 11
OSCO STD
5 10
C384
OSCI ACK
C385
0.001 6 9
0.1
NC SD
7 8
VSS LOADB
R225
C257
C386
100k
0.1
47p DTMF DECODE
Q43
R314 R315
2SC4081 R
33k 33k
C443
R316 0.001
2.7k
C395
C394 R218
68p
0.018
39k
C396
1
R5V
RX SIGNAL
IC20B
R273
NJM2904V
22k
5
R275 R274
7
22k 22k 6
C348
C351 0.1
0.1
C352
0.039
C349
C350
0.0068
0.01
DUSE
Q41
DTC144EUA
VCC
T5V
PHP
PLL
VCOS
RFIN
R5V
R5V
RSSI
MIXIN
MSKGS
MSKIN
RXIN
A
S5V
IDCIN
TXFO
+5V
BIAS
AFOUT
B
VCC
CPU5V
MICI
C
XOUT
VIN2
CTCSS
R5V
RXDT
DUSE