Kenwood TH-K4AT Service Manual page 48

430mhz fm transceiver
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A
B
C
D
TH-K4AT/K4E
1
TX-RX UNIT (X57-675X-XX) (A/3) 0-21 : M2 2-71 : E
Component side view (J72-0884-19 A/3)
2
+
3
R24
1
+
LV
R30
Q4
+
C38
C37
C26
4
+
C27
8
R21
C42
R36
+
C41
5
C57
C271
6
R131
Q23
C189
C188
C272
7
L46
C54
C56
C55
R38
L45
C186
R90
R351
8
C166
C190
1
16
R127
C116
9
C182
IC3
C176
8
9
R118
R135
C174
C170
C173
R117
10
C175
Q22
R123
C171
11
Ref. No. Address
Ref. No. Address
Ref. No. Address
IC1
4D
IC17
9I
12
IC2
8F
Q4
4C
IC3
9B
Q6
3E
IC6
6M
Q12
5J
IC9
9P
Q13
7F
IC10
6P
Q14
9E
13
IC11
6Q
Q15
5E
IC15
7P
Q20
10E
44
14
E
F
G
PC BOARD
C24
R19
Q6
R20
R18
+
D70
16
IC1
CN9
9
R231
C40
R34
Q15
C66
+
C128
R33
R144
R143
C126
C70
R137
VR6
TH3
DCS BAL
VR1
R145
Q13
FREQ
S
D
TH2
G
C114
+
D14
C195
C125
R82
R74
5
4
IC2
8
1
D15
C108
C117
R76
Q34
+
G
C106
R212
D
S
D31
C115
C168
R116
Q21
R215
R216
Ref. No. Address
Ref. No. Address
Ref. No. Address
Q21
10D
Q36
10E
Q56
7L
D31
Q22
10D
Q37
8L
Q57
8Q
D34
Q23
6B
Q38
7K
D7
4B
D40
Q24
8D
Q41
9Q
D14
8E
D41
Q27
6H
Q47
7S
D15
9D
D60
Q31
6L
Q51
4H
D16
4D
D61
Q34
9F
Q53
9Q
D25
6K
D62
Q35
10F
Q55
5P
D26
7L
D63
H
I
J
K
CN6
C310
D62
D63
D64
R252
D65
SET
R234
S
G
Q12
D
D25
S
R203
S
D
Q27
C78
G
C86
C368
R151
R152
R153
C200
TH1
C512
B
Q37
E
+
C213
C351
R166
R165
C331
1
8
IC17
R171
4
5
R170
J2
C211
C212
DC IN
C203
R324
R168
C204
R172
Ref. No. Address
9F
D64
4H
7L
D65
4H
7S
D69
3G
7S
D70
3H
3H
D71
3H
3H
D72
3G
3H
D81
10G
3H
L
M
N
O
PC BOARD
TX-RX UNIT (X57-675X-XX) (A/3) 0-21 : M2 2-71 : E
Component side view (J72-0884-19 A/3)
POWER
1
COM0
R246
R248
COM1
COM2
COM3
SEG0
SEG1
SEG2
SEG3
SEG4
SEG5
R207
SEG6
+
SEG7
+
C253
SEG8
SEG9
C249
SEG10
G
Q31
D
SEG11
S
SEG12
SEG13
Q56
SEG14
R204
C252
G
SEG15
D
SEG16
S
SEG17
C250
SEG18
SEG19
R202
SEG20
C
SEG21
SEG22
+
C246
SEG23
SEG24
SEG25
SEG26
SEG27
SEG28
SEG29
J3
SEG30
MIC
36
SEG31
J4
SP
J72-0884-19 (A/3)
P
Q
R
S
TH-K4AT/K4E
LCD
ANT
Q55
S
D
G
C304
R242
3
2
R227
IC10
4
1
R226
R237
+
C291
1
8
C290
IC15
4
5
R236
R238
C360
R244
C300
L63
Q41
4
3
Q53
C309
5
1
Component side
Layer 1
Layer 2
Layer 3
Layer 4
Foil side
45
1
2
3
4
5
6
7
8
9
10
11
12
13
14

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