Icom IC-F4101D Service Manual - page 34
10 - 1
SECTION 10. VOLTAGE
DIAGRAM
• MAIN-A/C UNIT (1/3)
TX 0.82V
RX 0V
TX 4W 2.26V
TX 1W 0.98V
RX 0V
TX 1.66V
RX 0V
TX 4.89V
RX 0V
TX 4W 3.50V
TX 1W 1.56V
RX 0V
TX 4W 1.76V
TX 1W 1.25V
RX 0V
TX 0.70V
RX 0V
TX 1.34V
RX 1.34V
TX 1.99V
RX 0V
TX 0V
RX 1.99V
7.50V
0.78V
0.76V
4.51V
4.98V
4.24V
0.77V
TX 1.72V
RX 0V
TX 0V
RX 1.73V
TX 1.75V
RX 2.43V
LOCK 3.23V
UNLOCK 0V
15.3MHz
1.06Vp-p
W 2.74V
N 0V
TX 0V
RX 0.59V
TX 0V
RX 4.69V
TX 0V
RX 3.27V
A 2.69V
D 0V
TX 0V
RX 0.55V
TX 0V
RX 0.65V
TX 0V
RX 1.77V
R138
470
R147
1.5K
R132
10K
R146
47
IC1
TA75S01F
1
2
3
4
5
R82
10K
R13
10
Q26
2SC4116
R151
27K
R152
8.2K
R155
27K
IC3
NJM2591V
1
OSCIN
2
OSCOUT
3
MIXOUT
4
V+
5
IFIN
6
DEC
7
FILOUT
8
FILIN
9
AFOUT
10
QUAD
11
IFOUT
12
RSSI
13
NOISEDET
14
NOISEREC
15
GND
16
MIXIN
EP5
MMZ1005Y102CT
R80
EXB28V102J
EP4
MMZ1005Y102CT
NOIS
SQIN
TMUT
S5V
NWC
MOD
HV
R5V
+5V
SCK
DISC
T5V
UNLK
LVIN
PLST
VCON
SSO
RSSI
D36
1SS390
D37
1SS390
D38
1SS390
D39
1SS390
FI1
FL-442
1
IN
2
OUT
3
GND
4
GND
5
6
MP3
2775
1
2
3
4
R153
3.3K
R154
8.2K
C235
10
R148
1K
C231
100P
C251
3P
C252
56P
C254
56P
C256
10P
C158
10P
C155
47P
C154
47P
C153
47P
ANT_BOARD
FI4
LTM450HW
I
O
X1
JTBM450CX70
C33
0.001
C32
0.001
C28
0.001
C26
0.001
C27
0.001
C224
0.001
C236
0.001
C238
0.001
C240
0.001
C160
0.001
C152
0.001
C264
0.01
C265
0.01
C263
0.01
R149
680K
C91
1
C31
0.1
C227
0.01
C226
0.01
C255
0.01
C257
0.01
C159
0.1
C156
0.1
C244
0.1
C239
330P
C253
6P
MP4
OG-503040
R140
3.9K
R175
560
C218
0.01
R9
10K
R8
22K
C30
0.22
C267
0.1
R172
10
FI3
LTM450FW
I
O
Q28
2SC4116
IC4
AK1541
1
CPVDD
2
TEST4
3
TEST1
4
LE
5
DATA
6
CLK
7
LD
8
PDN2
9
PDN1
10
REFIN
11
TEST2
12
TEST3
13
VREF1
14
DVSS
15
VREF2
16
RFINN
17
RFINP
18
PVDD
19
BIAS
20
PVSS
21
CP
22
CPZ
23
SWIN
24
CPVSS
25
C271
0.1
C272
0.1
C273
0.1
R162
100
R161
180K
R190
1K
IC5
NJM2711F
1
2
3
4
5
R165
1.5K
R167
6.8K
R166
5.6K
R163
100
C275
0.033
C276
27P
R164
4.7K
C274
0.1
C277
0.1
C284
0.01
C290
0.01
C282
0.01
C286
0.01
R173
3.3K
R174
3.3K
R177
1K
C291
0.1
C292
0.1
C293
0.001
C146
0.22
C145
0.22
C144
100P
R81
27K
C151
100P
C150
0.01
C148
10
R84
100K
X2
CR-892(15.3MHZ)
1
VCON
2
GND
3
OUT
4
VCC
ADS
T1
T2
LVA
DIF
S5C
PLSW
+3.3V
R134
100K
C147
0.001
R16
10K
C266
0.1
C261
0.01
C262
0.01
L23
MLG1608S
L24
MLG1608S
R158
4.7K
Q29
LDTC114YE
Q27
LDTC114YE
IC6
TC7W66FK
1
2
3
4
5
6
7
8
R169
1.5K
R58
100K
RXC
Q16
LDTC114YE
D31
HVD144A
D32
HVD144A
D33
HVD144A
D34
HVD144A
C8
2.5P
C4
1.5P
R2
2.7K
R5
2.7K
L3
0.30-0.9-5TL
L1
0.30-0.9-6TR
R4
1K
R1
68K
C1
1.5P
C10
0.001
R3
1K
L2
0.30-0.9-6TR
C2
8P
C7
0.001
C171
4P
L11
LQW18AN22NG00
C172
2P
D22
HVD142A
C173
0.001
C175
47P
R105
10K
C181
7P
R156
1K
R104
10K
R106
47K
D26
HVB350BYPTL-E
1
2
3
4
C183
0.001
C179
6P
C184
0.1
D24
HVB350BYPTL-E
1
2
3
4
C177
8P
C182
0.001
L15
LQN21A
D21
L1SS400
R102
470K
C192
0.001
R112
47
R109
10
R108
82K
C188
0.001
Q22
3SK293
C189
0.001
R103
1.8K
Q21
2SK1829
*R113
R110
100
C194
0.001
L16
LQN21A
R115
100K
R114
100K
R116
120K
C198
12P
R157
1K
C203
0.1
*C200
R159
12K
C197
0.5P
D28
HVB350BYPTL-E
1
2
3
4
C196
12P
C201
0.001
C221
47P
R118
120K
C211
0.001
R119
150K
R122
47
C217
0.01
C216
0.001
R121
3.3K
R117
100K
C215
18P
L20
ELJNC
L19
MLK1005S
C223
0.001
R120
120
Q23
3SK293
C213
47P
C214
0.001
R139
100K
C233
47P
C225
0.01
C19
0.001
Q1
RD07MUS2B-T112
C45
47P
L6
0.40-0.9-2TL
L7
0.40-1.4-5TR
C18
0.001
L4
NLV25T
R21
10
C49
0.001
C38
0.001
C36
47P
L5
0.40-0.9-2TL
C37
330P
R6
220
C11
0.001
C39
47P
D3
HVD142A
Q2
RD01MUS1-T113
EP6
MPZ2012S331A
L48
MLK1005S
R23
33K
R22
4.7K
C52
0.001
R29
47
C54
0.001
R30
22K
L8
MLK1005S
C55
10P
C57
330P
C51
4P
*R28
R24
47
R27
4.7K
*C34
C35
0.001
C65
0.001
R35
4.7K
R31
100
D5
HVD142A
C59
5P
R33
10K
C61
0.001
C67
2P
L9
MLK1005S
C60
47P
R34
100
C64
0.001
C71
10P
D6
HVD142A
*C206
C208
2P
L18
MLK1005S
C209
2P
C210
5P
C168
7P
C167
7P
L46
MLK1005S
R83
56
C149
100P
L31
MLK1005S
R41
10
R42
68K
C72
0.001
C74
5P
C73
0.001
R43
100
C81
3P
R44
100K
C76
0.001
C82
47P
L32
MLK1005S
C141
6P
L33
MLK1005S
C66
2P
R45
100
C78
0.001
R46
100K
C79
0.1
C77
0.001
Q11
LDTC144EE
EP11
MMZ1005A152ET
C83
0.75P
C101
0.5P
EP14
MMZ1005A152ET
Q12
LDTC144EE
C80
330P
C122
0.01
Q15
2SC4116
C121
10
R67
2.2K
C85
0.001
C87
18P
EP3
MMZ1005Y102CT
C84
330P
MP5
OG-503040
C109
0.001
D12
HVD350B
C93
330P
D15
1SV309
C94
47P
D16
HVD350B
L41
LQW18ANR47G00
R64
10
R87
100K
C110
0.5P
C120
0.001
C124
0.001
R68
470K
R66
150K
R65
27K
C118
47P
R72
100
C123
0.001
R71
10K
Q17
2SK880
C116
1
C186
0.1
C47
330P
FI2
FL-448
1
IN
2
OUT
3
GND
4
GND
5
6
C288
9P
R74
6.8K
R73
10K
C157
0.001
IC21
TA75S01F
1
2
3
4
5
R188
100K
C248
0.1
R189
100
R187
100K
R181
150
R182
2.2K
R183
2.2K
R127
120K
R126
100
FI5
LTUCG450G
DET
Q95
LDTA144EE
Q3
2SC3356
C112
0.001
R52
470
R185
100K
R186
270K
C247
39P
R178
5.6K
R176
22K
R171
22K
C117
0.0015
R135
1.5K
R136
1.5K
C232
33P
CP1
C246
10
R78
0
R79
1.2K
R77
2.2K
C134
0.47
R76
120
C132
0.33
R59
270K
R62
120K
R142
120K
R141
68K
R123
0
C287
4P
R184
10
L37
LQW18ANR47G00
L42
LQW18ANR47G00
EP7
MMZ1005A152ET
EP8
MMZ1005A152ET
C195
2P
C199
2P
C12
9P
R14
270
R15
1K
R12
470K
R10
100K
C89
12P
D11
HVD350B
L36
0.30-0.9-4TR
C86
5P
C107
12P
C106
12P
R57
0
C105
10P
L35
MLG1608S
C241
33P
Q13
2SC4226
Q14
2SC4226
C119
1
R107
27K
Q4
2SC5107
Q8
2SC5107
Q9
2SC5107
Q10
2SC5107
Q24
2SC5107
C48
47P
C50
47P
C68
0.001
C75
47P
C95
47P
D10
MA2S7280G
L40
0.30-0.9-3TR
C176
27P
C180
33P
C178
2P
C63
5P
R32
22K
C62
8P
C13
15P
C9
3P
C5
7P
D2
LRB751S-40T1G
D1
LRB751S-40T1G
C3
1P
C6
1P
R11
82K
C242
150P
C243
150P
C283
6P
R128
680
C104
5P
C108
3P
C111
8P
C92
15P
C88
10P
C90
0.5P
R51
470
R70
220K
R69
150K
C127
0.001
C103
47P
C102
0.001
C14
27P
D14
HVD396C
R53
6.8K
R54
6.8K
R55
6.8K
R56
6.8K
C53
330P
*C300
L13
LQN21A
L14
LQN21A
*C15
*C96
R101
220K
PLST
SSO
SCK
R5V
S5V
+5V
HV
UNLK
NOIS
DISC
LVIN
SQIN
VCON
MOD
TMUT
NWC
RSSI
PLST
SCK
SSO
T5V
T2
+5V
VCON
DET
S5C
+5V
UNLK
R5V
DIF
ADS
LVA
T1
T2
R5V
ADS
TMUT
DIF
R5V
S5C
PLSW
RSSI
+3.3V
+3.3V
+3.3V
T5V
S5V
PLSW
RXC
NWC
T1
RSSI
R5V
R5V
S5V
VCOV
MOD
T5V
LVIN
R5V
DET
RXC
+3.3V
LVA
NOIS
SQIN
DISC
APCV
T1
+5V
+5V
HV
PAV
LPF
APC
AGC
RF AMP
MIX
IF AMP
IF IC
REF
T5V
R5V
HV
T5V
*3 MULTI
PLL
S5V
HV
T5V
L:NARROW H:WIDE
TX VCO
RX VCO
*: Refer to the PARTS LIST for the value and name of component.