![background image](http://html.mh-extra.com/html/icom/ic-f3gs/ic-f3gs_service-manual_612560078.webp)
VCC
R5
5V
S5
MIC
VCC
CPU5
T5
5V
5V
R5
S5
VOLIN
VOLOUT
AFOUT
MIC
SP
VCC
CPU5
T5
R5
S5
5V
S5
T5
R5
C223
0.01
C224
0.01
C562
47 P
D
R131
470
Q17
UN911H
R130
100 k
C147
0.1
C554
470 P
PTT
C154
10
C
8
9
10
IC3C
NJM3403AV
C133
0.1
C677
470 P
C209
0.1
C563
47 P
R177
1 k
C125
0.0022
C124
0.01
C217
0.1
R176
3.9 k
R93
27 k
R109
10 k
C134
180 P
C665
47 P
C556
47 P
R104 100 k
R108
180 k
C132
0.0056
7
6
5
IC3B
NJM3403AV
R96
47 k
R94
1 M
I/O
1
O/I
2
O/I
3
I/O
4
CONT.B
5
CONT.C
6
VEE
7
I/O
8
O/I
9
O/I
10
I/O
11
CONT.D
12
CONT.A
13
VDD
14
IC4
BU4066BCFV
C286
0.0022
R95
1 M
C126
0.0027
R257
4.7
VCC
S5
R5
R159
100 k
R97
220 k
R98
180 k
C212
0.01
C213
2.2
C214
0.033
R113
68 k
R168
10 k
R505
1 k
R506
1 k
R169
10 k
R170
10 k
C128
1
R112
1 M
C136
0.0056
VCC
R178
3.3 k
C129
15
14
13
12
IC3D
NJM3403AV
R120
68 k
R145
1 M
R99
18 k
R100
2.2 k
R115
120 k
C135
180 P
R117
1.5 k
R116
1 k
D26
DAN202K
Q15
2SB1132 R
5
6
2
1
Q16
XP650
C1
0.1
R121
1 k
C139
0.1
VCC
CPU5
CTCIN
REMO
VOLOUT
AFONOP
AFON
AFOUT
TEMPS
R182
NTCCM20124AG473JCT
R181
100 k
R182
C231
0.1
PB0/AN0
1
AVSS
2
TEST
3
X2
4
X1
5
VSS
6
OSC1
7
OSC2
8
RES
9
NMI
10
P20/IRQ4/ADTRG
11
P21/SCK1
12
P22/SI1
13
P23/SO1
14
P24/SCK3
15
P25/RXD
16
P26/TXD
17
P27/IRQ0
18
P17/IRQ3/TMIF
19
P16/IRQ2
20
P15/IRQ1
21
P14
22
P13/TMIG
23
P12/TMOFH
24
P11/TMOFL
25
IC8
HD64
R215
100 k
R216
100 k
C232
0.1
C195
39 P
BDET
R103
12 k
D14
MA77
TONE
CTCSS
SIGOUT
C123
0.001
OUT
1
VDD
2
VSS
3
NC
4
CD
5
IC11
S-80942ANMP-DD6
C197
0.1
R148
47 k
L33
39 H
VOLIN
R150
470
R164
120 k [F4GT] only
SCK
SO
T1
T2
T3
T4
VIN1
1
VOUT1
2
VOUT2
3
VIN2
4
VDD
5
LD
6
CLK
7
DI
8
VIN3
9
VOUT3
10
VOUT4
11
VIN4
12
VIN5
13
1
2
3
4
5
VOUT5
14
VOUT6
15
VIN6
16
DO
17
VDAREF
18
RESET
19
GND
20
VIN7
21
VOUT7
22
VOUT8
23
VIN8
24
IC10
M62363FP-650C
VCC
C148
0.01
R171
47 k
R125
27 k
1
2
4
5
3
IC6
TK11250BM [OTHER]
NJM2870
D
Q20
DTA144 EU
R135
10 k
4
5
6
3
2
1
Q19
XP6501 AB
Q18
2SB1132 R
R137
100
R516
15 k
TONE
BEEPOUT
VOLIN
VOLOUT
AFOUT
VOLOUT
AFOUT
CPU5
C215
0.1
VOLIN
VOLOUT
AFOUT
S5
VCC
T5
T5C
R5C
R5
R260
10 k
R261
10 k
MICIN
MICOUT
CPU5
Q22
2SA1577 Q
Q21
2SA1577 Q
MIC
SP
MIC
C164
0.001
R144
33 K
C163
0.001
C553
47 P
MC1
KUC3523-040245
1
2
J6
BM028-ASRS-TF
S3
JPM1990-2711R
EXT.MIC
PTT
SWITCH
VOL/ PWR
SWITCH
VOLIN
VOLOUT
OPT
MIC
A
(VR)
R142
100
C282
0.001
J2
HSJ1122-010010
C165
0.001
R143
TP76N00N-15F-10KA-2251
UP
VCC
HV
R132
470
R141
4.7 k
R139
4.7 k
C161
0.01
C174
22
R174
15 k
R140
100 k
R515
120 k
C669
47 P
C162
0.01
D27
RB706F-40
S5
T5
R5
DN
C160
0.01
C159
470 P
R134
2.2 k
R239
1 k
KR3
KR2
KR1
KR0
KS4
C158
22
S2
JPM1990-2711R
C155
10
C156
0.1 [OTHER]
0.01
D
C248
0.01
C679
47 P
D
C311
0.1
D
R221
390 k
C244
0.01
R220
330 k
R219
100 k
I
120 k [OTHER]
R275
4.7 k
D
only
R276
10 k
D
only
R218
100 k
I
120 k [OTHER]
Q36
2SC4116 GR
Q42
DTC144EU
D
only
R165
120 k [F4GS] only
R154
470 k
R152
470 k
C236
0.01
C144
0.001
C230
0.022
R228
10 k
R225
100 k
R147
12 k
C196
470 P
SCK
SI
SO
DAST
SCK
SI
SO
DAST
A0
1
A1
2
A2
3
VSS
4
SDA
5
SCL
6
WP
7
VCC
8
IC7
HN58X2432TI [OTHER]
HN58X2464TI
O
R525
1 k
C245
0.01
CLOUT
CLOUT
CLIN
CLIN
NOIS
NOIS
VIN
XIN
XOUT
RESET
CSIFT
R102
10
R101
1 M
C193
8 P
C194
12 P
X2
CR-663
R226
1 k
R232
1 k
CONT
R193
100 k
R194
100 k
R195
100 k
R196
100 k
R273
100 k
D
only
R272
100 k
D
only
R235
680 k
R241
1 M
R242
1 M
R243
1 M
C199
0.1
C250
0.01
R207
47 k
R234
22 k [OTHER]
10 k
D
Q35
2SC4116 GR
C227
0.1 [OTHER]
0.047
D
Q38
DTC144EE
OPT2
OPT1
CTDA0
CTDA1
CTDA2
CCS
OPT3
CIRQ
BUSY
OPT2
OPT1
CCS
OPT3
CIRQ
BUSY
R202
47 k
R203
47 k
R224
27 k [OTHER]
12 k
D
R227
47 k
C219
0.0082
C228
820 P
C216
0.1
R5
T5
R190
22 k
R191
22 k
R192
22k
R197
220 k
R198
18 k
R532
470 k
Q405
XP1213
R213
470
R212
68 k
C198
2.2
C200
0.033
C201
0.1
C222
0.1
3
2
1
4
8
IC12A
NJM2904V
R211
120 k
5
4
3
2
1
5
6
1
3
2
5
4
7
IC12B
NJM2904V
IC15
TC7S66FU
D
only
IC14 TC7S66FU
C221
0.039
C202
0.01
2
3
5
6
8
9
0
#
P0
P1
P2
P3
R238
1 k
R240
1 k
C249
0.01
KS0
KS1
KS2
KS3
S1
S1
JPM1990-2711R
1
4
7
C169
0.001
Q31
DTC144TU
EXT.SP
AFOUT
SP
CLONE
C173
47 [OTHER]
33
D
J3
HSJ1456-01-220A
C167
47 P
C168
0.001
C283
0.001
C675
470 P
BDET
DC
BDET
T5
R5
S5
S5
VCC
DISCIN
AFOUT
CPU5
T5
R5
S5
S5
VCC
DISCIN
AFOUT
CPU5
CPU5
C225
0.0068
R200
47 k
R533 100 k
R199
47 k
P10/TMOW
VSS
COM4
COM3
COM2
COM1
KS4
V3
V2
V1
VCC
PA3/COM4
PA2/COM3
PA1/COM2
PA0/COM1
P50/WKP0/SEG1
P51/WKP1/SEG2
P52/WKP2/SEG3
P53/WKP3/SEG4
26
27
28
29
30
31
32
33
34
35
36
37
38
39
P81/AN1
P82/AN2
P83/AN3
P84/AN4
P85/AN5
P86/AN6
P87/AN7
AVREF
VTREF
TONED
TONEM
AVCC
PE3/SEG52/CL1
/S
G
/C
LVIN
SD
REMO
PTT
CTCIN
CPU5
CPU5
CPU5
DTMF
MTONE
100
99
98
97
96
95
94
93
92
91
90
89
88
87
VIN
VOUT
CTRL
GND
NB
CLIN
CLOUT
BDET
MMUT
R5C
RMUT
OPV1
OPV2
OPV3
GND
OPT3
OPT2
OPT1
SIGOUT
MOWN
BUSY
AUX
MICIN
MICOUT
PTTOUT
PTTIN
SCK
SI
SO
CIRQ
CCS
REM
AFOUT
DISCIN
RXMUTE
RMUTE
BEEPOUT
AFONOP
MICMUTE
MMUTE
VCC
5V
GND
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
16
to Optional unit
J5
AXN330C038
17
18
19
20
21
22
23
24
25
26
27
28
29
30
BUSY
DUSE
DET
S5C
TONE
MTONE
DTMF
REM
NWC
FRQCOM
CTCSS
CTCIN
ESDA
ESCK
DBAL
DEV
DET
5V
CTCIN
DAST
SPEAKER
SP1
K036NA500-47
W1
OPC-963
1
2
PLST
PLST
CPU5
R510
1 k
R509
10 k
C674
47 P
R503
10 k
R507
1 k
R508
1 k
C672
47 P
L441
1.0 H
EP10
BLM11B221SB
EP11
BLM11B221SB
L443 BLM21P300S
R520 330
R521 330
C565
47 P
C566
47 P
R519
1 k
C550
22
CPU5
R153
470 k
L442
0.1 H
R517
68 k
I
180 k [OTHER]
R229
560 k
I
180 k [OTHER]
R230
180 k
I
56 k [OTHER]
R231
68 k
I
22 k [OTHER]
R105
470 [OTHER]
390
H
R44
8.2 k [OTHER]
10 k
H
R114
33 k [OTHER]
22 k
H
R107
82 k
I
150 k [OTHER]
C137
0.033
I
0.027 [OTHER]
0.012
D
C663
0.047
R133 4.7
C662
0.1
R146
12 k
R534
1 k
Tx: 4.79 V
Rx: 0.00 V
4.89 V
Tx: 4.84 V
Rx: 0.19 V
4.84 V
4.99 V
CTCSS
1.08 Vp-p
Tx: 2.20 V
Rx: 2.20 V
R 1.4 Vp-p ( a) 1 kHz, –1.5 kHz)
T 2.3 Vp-p ( a) 1 kHz, 15 mV mic input)
Tx: 2.20 V
Rx: 2.21 V
AFON
3.96 V
Tx: 0.00 V
Rx: 4.97 V
5.01 V
4 Vp-p
(a)1 kHz, 15 mV mic input)
Tx: 2.19 V
Rx: 2.20 V
Tx: 2.19 V
Rx: 2.20 V
2.5 Vp-p
( a)1 kHz, –1.5 kHz)
DTMF 2.2 Vp-p
BEEP 2.5 Vp-p
2.59 V
Tx: 0.03 V
Rx: 1.99 V
78 mVp-p
( a)88.5 Hz CTCSS, –0.35 kHz)
1.2 Vp-p
( a)88.5 Hz CTCSS, –0.35 kHz), 3.7 V P-P(DTCS)
Tx: 1.07 V
Rx: 0.07 V
DTCS
720 mVp-p
840
mVp-p
DTCS
2.8 Vp-p
3.2 Vp-p
Tx: 3.46 V
Rx: 1.52 V
CTCSS 3 Vp-p
SECTION 12
VOLTAGE DIAGRAM
12 - 1
Summary of Contents for IC-F3GS
Page 1: ...SERVICE MANUAL VHF FM TRANSCEIVERS ...
Page 39: ......
Page 40: ...1 1 32 Kamiminami Hirano ku Osaka 547 0003 Japan S 13713IZ C1V q 2000 Icom Inc ...
Page 41: ...SERVICE MANUAL UHF FM TRANSCEIVERS ...
Page 82: ......
Page 83: ...1 1 32 Kamiminami Hirano ku Osaka 547 0003 Japan S 13713IZ C1U 1 2000 Icom Inc ...