Icom IC-F5121D Service Manual page 36

• MAIN UNIT (1/3)
8.0V
8V
Q2
HV 2SC4116
HV
T8V
T8V
8V
R8V
R8V
C127
15P
8V +5V
8V
V+8
+5V
+5V
IC7
L1
+3.3V GND4
+3.3V ELJNC
IC7
VREF PLSW
VREF
TC7W66FK
1 2
L3
0.35-1.6-7TL
NWC
NWC R348
120K
PLSW LVA
PLSW
C124
T1
T1
220P
T2
T2
TMUT
TMUT
R95
RXC
RXC 220
L2
NLV25T
MOD
MOD
L5
F
F
0.25-1.9-7TL
SQIN
SQIN
SCK
SCK
5.0V
R101
Q3
SSO
SSO
1K
2SK880
LVA
LVA
R92
100K
R505
PLST
PLST 6.8K
ADS
AD S
UNLK
UNLK CP1
LVIN
LVIN
RSSI
RSSI
NOIS
NOIS
DISC
DISC
PLL
DI F
DI F EP8
5.0V
MMZ1005Y102CT
VCON +5V
VCON
DET
DET
UNLK 0.0V
1
LK 3.3V CPVDD PVDD
R496
2
TEST4 IC8 RFINP
EXB28V102J
UNLK 3
TEST1 AK1541 RFINN
PLST 4
LE VREF2
5
SSO
DATA DVSS
SCK 6
CLK VREF1
5.0V
R504
+5V +5V 100K
3.0V
*3 MULTI
15.3MHz
1.0Vp-p
C323
C165
10P
0.001
FI2
C385 C384
LTM450FW
0.01 0.01
I O
D2 D8
HVD144A HVD144A
VCON
FI1
D3 C394 C395 D9
LTM450HW
HVD144A 0.01 0.01 HVD144A
I O
Q1
LDTC114YE
5.0V
Narrow 0.0V
Wide 2.1V
L:NARROW(Digital)
H:WIDE(Mid)
R85 R79
MP 1
3.9K 1.8K RX VCO
R339
L7 C126 0
C6342A
18P
Q6
2SC4226
L10 C113
NLV25T 0.5P
R84 R83
3.9K 1.8K TX VCO
R328
L8
0
0.25-1.9-7TL
C123
Q7
47P
2SC4226
C118
0.75P
Q101
4 3
EP9 2
MMZ1005Y102CT
5
R77
2.2K
Q8
R90 R291
LDTC114YE
82K 100K
C350
1
3
TX 0.0V
RX 2.3V
3.3V
L13
C488 C337
0.001 0.001 ELJRF
C300
15P
R93
27K
18
17
16
15
14
13
R492
100K
R236
1.2K
4.9V
C306
6P
IF IC
IC4
Q4 NJM2591V
2SC4116 1 16
OSCI N MIXI N
2 C15
OSCOUT GND
3 14
MIXOUT NOISERE
4 13
V+ NOISEDET
5 12
IFIN RSSI
C396 R44 6 11
DEC I FOUT
120K 7 10
0.1
FILOUT QUAD
8 9
FILI N AFOUT
R171
100
Narrow 0.9V
R178 R478
Wide
47 15K
Q9
R172
C286 2SK3019
180K
8P
Q5
R502
5
2SC4116
4
1.5K
1
Q24
3
IC5
LDTC114YE
C283
2
NJM2711F
0.1
R174
6.8K
7.1V
TX 3.0V
RX 0.0V
C90
0.001
C460
18P
C93
C92
18P DRIVER
Q12
0.001
2SC5006
Q17
C100 2SC3357
10P
Q15
2SC5006
Q11
TX 2.3V
2SC5006
C302
RX 2.2V
10P
TX 0.0V
RX 2.9V
TX 0.0V
RX 7.9V
R8V
FI4
FL-442
4 1
GND IN
C61
2 3
100P OUT GND
C62 Q14
82P 2SC5107
R494 R489 R488
D17
4.9V
1.5K 3.3K 3.3K HVD144A
D13
R483 R484
D18
IF AMP
HVD144A 3.3K 3.3K
HVD144A
D14
HVD144A
1.0V Q13
LDTC114YE
R490
Narrow0.0V
1K
Wide 2.1V
C506
100P
R501
C509
FI5
R497
4.7 47K
180K FL-448
4 1
5 GND IN
3 2 3
OUT GND
4
1
2
IC6
TA75S01F
L:NARROW(Digital)
H:WIDE(Mid)
R8
100
TX 6.7V L26 D24
AS080547-47N
RX 0.0V RN752
R332
R333
*L21
0 10
C456
0.001
FI7
NFM60R20T152
FI8
NFM60R20T152
3
*FI6
3
3
TX 8.0V
RX 0.0V
*R212
R58
470
50W4.9V
25W3.9V
R28
6.8
TX 0.0V
RX 7.4V
L24
ELJRE
TX 0.0V
RX 6.5V
C392
C41 C343
18P 18P 0.001
MI X
C40
Q19 4P
3SK293
R23 R21
10K 10K
TX 0.0V
RX 0.5V
TX 0.0V
RX 3.9V
Q18
LDTC114YE
L:Digital
H:Analog
*: Refer to the PARTS LIST for the value and name of component.
11 - 2
T8V
W1
RDS2T0R0
LP F
L30
L33 L35
C14
AS080547-47N AS080547-47N AS080547-47N
0.001
*R10 *R5 *R6
50W2.3V
25W1.6V
13.6V
HV
T8V
R57
10K
C79
0.22
R56
150K
IC2
TA75S01F
5
3 APC
4
1 R52
T1
15K
2
Q23
R55
LDTC114YE
4.7K
*Q21
TMUT
TX 0.0V
L31 C440
RX 3.0V
12P
C2520C
C19
0.001
C442
3.5P
R8V
R319
AGC
10K
TX 0.2V
Q22
RX 1.4V
2SK1829
C363
0.015
RSSI
D34
DA221
R320
Q20
470K
3SK293
C30
C22
8P 1.5P
RF AMP
R11
4.7K
R13
4.7K
TX 0.0V
RX 5.7V