Icom IC-F4101D Service Manual page 34

SECTION 10. VOLTAGE DIAGRAM
• MAIN-A/C UNIT (1/3)
HV HV
HV
T5V
+5V S5V
+5V
+3.3V
+3.3V
S5V
S5V
TX 1.75V
R5V
R5V
RX 2.43V
T5V
T5V
R78 R76
RXC
RXC 0 120
SSO
SSO
SCK
SCK
PLST
PLST
PLSW
PLSW
NWC
NWC
ADS
ADS R72
100
TMUT +5V
TMUT
MOD
MOD
Q17
VCON
VCON
2SK880
R74
SQIN
SQIN
6.8K
LVIN
R70
220K
LVA
LVA
T1
T1
T2
T2
S5C
S5C R66
150K
DIF
DIF
LVIN
LVIN
RSSI
RSSI
DISC
DISC
DET
DET
NOIS
NOIS
UNLK
UNLK
C147
0.001
LOCK 3.23V
PLL
EP4 R81
UNLOCK 0V
MMZ1005Y102CT 27K
+5V
1 18
CPVDD PVDD
2 17
TEST4 IC4 RFINP
UNLK 3 16
TEST1 AK1541 RFINN
PLST 4 15
LE VREF2
SSO 5 14
DATA DVSS
6 13
SCK
CLK VREF1
R80
EXB28V102J
R84
100K
S5C
15.3MHz
EP5
C157
MMZ1005Y102CT 1.06Vp-p
0.001
+5V REF
FI3
C263 C262
LTM450FW
0.01 0.01
O I
D38
D36
1SS390
1SS390
D39 C265 C264 D37
1SS390 1SS390
0.01 0.01
I O
VCON
FI4
LTM450HW
Q27
LDTC114YE
W 2.74V
N 0V
HV
T5V
S5V
Q15
4.24V
2SC4116
VCOV
R54 R53
6.8K 6.8K
L36
L37
0.30-0.9-4TR Q13
LQW18ANR47G00
2SC4226
C88
C92
RX VCO
15P 10P
L35
MLG1608S
R56 R55
6.8K
6.8K
R57
0
L42 C106
C111 L40
Q14
LQW18ANR47G00
0.30-0.9-3TR 12P TX VCO
8P
2SC4226
L41
R68 R87
LQW18ANR47G00
470K 100K
TX 0V
RX 1.73V
MP3
2775
C116
1
IC6
TC7W66FK
1 8
2 7
3 6
4 5
TX 0V
RX 3.27V
TX 0V
RX 4.69V
*3 MULTI
C251
3P
Q26
C253
C256
2SC4116
6P
10P
IF IC
IC3
NJM2591V
TX 0V
1 16
OSCIN MIXIN
RX 0.59V
2 15
OSCOUT GND
3 14
MIXOUT NOISEREC
4 13
V+ NOISEDET
5 12
IFIN RSSI
6 11
DEC IFOUT
R139
7 10
C261 FILOUT QUAD
100K 8 9
FILIN AFOUT
0.01
R141
C243 68K
150P
R161 R162
180K
100
R163 R164
100 4.7K
C276
27P
Q28
5 C277
2SC4116 4
0.1
1
C273
3
IC5
0.1
2 NJM2711F
R167
6.8K
10 - 1
4.98V
TX 1.34V
RX 1.34V
C83
0.75P
C63
5P
C71
Q10
C74
10P
2SC5107
D5
5P
HVD142A
Q8
0.78V
0.77V 2SC5107
4.51V
Q11
TX 1.99V TX 0.70V
LDTC144EE
RX 0V RX
R5V
C101
0.5P
TX 1.72V
Q95
RX 0V
LDTA144EE
Q12
Q9
LDTC144EE
2SC5107
0.76V
TX 0V
L46
C149
MLK1005S RX 1.99V
100P
Q16
LDTC114YE
C224
0.001
R5V
FI1
FL-442
IF AMP 4 1
GND IN
2 3
OUT GND
C231
100P
C232
33P
C227 D33 R173
0.01 3.3K
HVD144A R174
R136
3.3K
R182
1.5K Q24 D34
2SC5107 HVD144A 2.2K
R183
2.2K
FI2
C247
FL-448
39P
4 1
GND IN
2 3
R186
OUT GND
270K
R185
C246
100K 5
10
3
4
1
2
IC21
TA75S01F
TX 4.89V
HV RX 0V
T5V
7.50V
PAV
L6
0.40-0.9-2TL
C55
10P
C59
5P
Q4
2SC5107
C45
Q3 47P
2SC3356
Q2
Q1
RD01MUS1-T113
RD07MUS2B-T112
0V
TX 4W 2.26V
TX 1W 0.98V
RX 0V
APCV
T5V
APC
C30 R9
0.22
10K
R12
C31
470K
0.1
IC1
TX 4W 1.76V
TA75S01F
TX 1W 1.25V R14
5 3
270
RX 0V
4
1
2
*C206
L18 C210
MLK1005S
5P
R118
120K
L19
MLK1005S
C197
*C200 0.5P
Q23
D31
3SK293
HVD144A
D28
D32
HVB350BYPTL-E
HVD144A
TX 0V
RX 0.55V
MIX
R177
1K
Q29
LDTC114YE
A 2.69V
D 0V
*: Refer to the PARTS LIST for the value and name of component.
TX 1.66V
RX 0V
ANT_BOARD
LPF
L2
0.30-0.9-6TR
D3
L3
L1
C10
HVD142A 0.30-0.9-5TL
0.30-0.9-6TR
0.001
C11 C8 C4
0.001 2.5P 1.5P
R3
R4
1K
1K
TX 0.82V
RX 0V
L11
T5V
LQW18AN22NG00
C173
R16 0.001
10K
R10
100K
T1
TX 4W 3.50V
TX 1W 1.56V
RX 0V
TMUT
R107
27K
AGC
C186
Q21
R101
0.1 2SK1829
220K
RSSI
Q22
3SK293
C181 C178
7P 2P
RF AMP R105 R104
10K 10K
TX 0V
TX 0V
RX 0.65V
RX 1.77V
D24
D26
HVB350BYPTL-E
HVB350BYPTL-E