Icom IC-F4261DT Service Manual page 100

• MAIN-A/B/C UNIT (2/4)
HV
T5V
S5V
+5V
8
V+ IC5
GND NJM2904V
TEMP 4
R138
100k
R129 IC5
BAL X3
R141
10k 3 1 4
R130
VCON VCC
REF 1
15k
2 2 3
680k NJM2904V GND OUT
15.3MHZ
ACZ1005Y MMZ1005A152ET
EP3
+5V
IC14
24 OUT1 1
OUTO
23 VCCIF 2
VCCRF
22 VPIF 3
VPRF
21 CPOIF 4
CPORF
20 GND 5
GND
19 FINIF 6
FINRF
18 FINIF 7
FINRF
R140 17 GND 8
GND
PLST 16 LE 9
OSCX
SSO 15 DATA 10
OSCIN
14 CLOCK 11
SCK
FO/LD
13 IF_EN 12
UNLK
RF_EN
1k
LMX2352TM
R153
S5V
1.2k
TX 0V
RX 3.10V
C160
4P
R5V
L35
Q18
0.1U
LDTA144EE
CFWKA450KFFA
FI2
C134 C145
O I
0.1
0.1
DAN235E DAN235E
4.7
D3
D4
R137
FI1 1
OSCIN
C135 C143
2
I O OSCOUT
3
0.1 0.1 MIXOUT
4
V+
C153
5
0.1
IFIN
6
CFWKA450KHFA C150 DEC
100k 7
FILOUT
R151 8
0.1 FILIN
R5V
N 4.72V
W 0V
33P
D 4.72V
C155
C132
27P Q19
5
4
C140
1 2SC4116
3
0.1
2
IC13
NJM2711F
R145
0
HV
T5V
S5V
+5V
Q24
5.00V
2SC4116
LV
Q22
2SK880
15.3MHz
730mVp-p
R179
R165
330 470
EP22
R160
1k
R180
C164
100k
47P
Q25 2SK3019
C185
Q26 2SK3019
1P
R181
R163 R171
220k
15k 15k
Q21
2SC4116
DA2S00100L DA2S00100L
R5V
TX 0V
RX 4.71V R184
100k
0.001
C199
IC15
16
MIXIN 0.01
15
GND 33P
14
NOISEREC
C183
13 Q23
NOISEDET
12
2SC4215
RSSI 1.5k
11
IFOUT R167 R415
10 D8
QUAD
9
AFOUT 1.5k
NJM2591V
R162
DAN235E
470
TX 0V
C200
RX 4.72V
0.01
TX 0V
RX 1.29V
11 - 3
HV
T5V
S5V
VCO5V
L9 C226 C241
1.2U 8P 8P
L12
1.2U
3401
MP1
L10 C228 C242
1.2U 10P 12P
L13
1.2U
R204
L8 C224 C240
1.2U 12P 10P
0
D13
L11 MA368
1.2U
R5V
R189 C235 R207
1
18k 100k
TX 0V
RX 4.04V
FI3
C231
4 1
GND IN
2 3
OUT GND R188 0.01
2SC4116
560
FL-461
Q27
D16
0.1
LDTA144EE
Q29
DAN235E
FI4
C232
4 1
R185 GND IN
2 3
OUT GND 0.01
TX
330
R197
RX 0.37V
FL-462
10k
Q28
2SC4116 N 4.32V
W 4.32V
D 0V
HV
T5V
S5V
EP6
ACZ1005Y
4.14V
Q30
2SC4226
C257
4.90V
0.5P
Q31
2SC4226
C276 R233
C261
5P 10
0.5P
Q34
2SC4226
TX 0V
R211 C277
RX 4.49V
DMC561040
470 9P
Q35
EP5
1 Q38
ACZ1005Y
2 LDTC144EE
Q37
3
MT3S37T
Q32
R221
2SC4226
10k
Q36
C255
R227
4 3
0.5P 10k
LDTC144EE 2
Q51
R224
5 1
TX 0.13V
R209
1k
DMC561040
RX 0V
470
R5V
R217
15k
R223 L37
0 33N
C258 R423
0.01 10
Q33
C269 C285
15P 0.5P
3SK324
0V
C284
0.001
*: Refer to the PARTS LIST for the value and name of component.
TX 1.87V
RX 0V
C493
0.001
C318
TXRF
C306
C298 0.001
D20 D39
10P 1SV308 1SV308 5P
Q40
2SC4226
C481 C480
0.001 0.001
7.50V
TX 4.88V
RX 0V
HV
TX 0.15V
RX 2.01V
J1
19 20
17 18
TX 0V
15 16
13 14
RX 4.87V
11 12
9 10
7 8
ISENS
5 6
T2
3 4
TMUT
1 2
TX 0V
RX 4.84V
TX 0V
RX 1.33V
C304
0.1
R250
TX 0V
Q41
10k
RX 4.58V
C303 C312
10 7P 2P
Q39
R240
3SK293
D21 D24
HVB350BYPTL
HVB350BYPTL
TX 0V TX 0V
RX 1.76V
RX 0.56V
C316
0.001