Service manual

TH-K4AT/K4E
SCHEMATIC DIAGRAM
YXWVU
1
2
3
4
5
6
7
-t
5R
D13
HVC131
R47 5.6k
L65
27n
2SK2596
Q11
C78 470p
C96 1p
(B)
CN10
L17
2.5n
L21
4T
R41 270
D73
MA2S111
2SK3476
Q12
D12
HVC131
C82
470p
C364
18p
L54
4.7n
C363
10p
C61
470p
R56 10k
L18
220n
C369
470p
C83
0.01u
R64 0
C361
470p
R46
10k
R39 270
L19
4T
C93 3p
(B)
2SK1830
Q58
C324 470p
C97 4p
(B)
C100 2p
(B)
C95 2p
(B)
2SC4617(R)
Q15
R271
12
R33 22
D8
HSC277
L14
4.7n
L20
4T
R54
47
C75
470p
C94
470p
L30
C66
0.1u
R55 4.7k
C328 1u
C67
470p
R49
1k
R62 270
C64
470p
C72
0.1u
C71
470p
R53 1k
R60 56k
C329
12p
C91
470p
C99 5p
(B)
C323
470p
L10
18n
R45
3.3k
L22
4T 4T
R42 0
R347
150
R58 47
C88
20p
(G)
D10
HVC131
C70
1u
C86 56p
L23 1u
L11 15n
L16
L13
L56
6.8n
R289
0
R51 470
C102
3p
(B)
R50
33
D9
HSC277
L15
4.7n
C77
47p
C89
33p
R61 270
C357
1u
D11
HVC131
C84
0.1u
C327 0.1u
2SC5488
Q9
C87
18p
C73
470p
R344
47
R52 1k
C101 4p
(B)
C90
470p
C76
8p
C98 2p
(B)
C65 10p
C326
470p
D74
HSM88AS
C68
10p
2SC4926YD
Q10
R59 12k
R34
3.3k
R348
68
R85 560
R77
150k
(D)
Q14
RN4902
R78 150k
(D)
C113
470p
R86
5.6k
TH1
10k
C118
470p
C112 470p
R74 100k
(D)
D14
RB521S-30
R71 0.39 R70 0.39
R83
56k
C109
470p
2SK1830
Q13
C105
470p
C108
100p
R82
27k
C106
470p
C115
470p
C111
470p
C117
470p
R76
150k
(D)
C512
*
R75
100k (D)
R80 10k
IC2
NJM2904V
1
AOUT
2
A-IN
3
A+IN
4
GND
5
6
7
8
R84
100k
R81 390k
C107
470p
R72 0.39
C116
10u4
C114
470p
R79
150k (D)
D15
MA8039
C356 0.01u
C110
470p
L25
C132
0.01u
C164 470p
C162
470p
3SK318
Q16
C128
0.01u
R107 100k
L36
56n
R88
330
D20
1SV305
R103 1.8k
L40
4.7n
R97 150k
C131
0.01u
L26
470n
R91
1k
R352
0
R111
1.0M
C146
4p
(B)
C140
4p
(B)
C133
0.01u
D18
1SV305
L35
150n
C129
11p
R108
120k
C130 470p
R110
1.0M
C152
470p
XF1
L71-0619-05
C126
10p
C141
470p
C145
8p
(B)
L41
6.8n
L32
27n
C158
13p
(G)
L38
12n
L34 27n
C125
1.5p
R90
330
R351
220
C156
470p
D21
1SV305
C142
470p
D19
1SV305
C144
18p
(G)
R101
47
C161
3p
(B)
R104
150
R109 100k
R98 100k
3SK318
Q17
R95
180k
C148
6p
(B)
C165 3p
(B)
R96
100k
R99
1.0M
C134
470p
C153
470p
C147
470p
C159 3p
(B)
R100
1.0M
R92
3.3k
C160
13p
(G)
C163
470p
C157
18p
(G)
R93 47
R94
330
C137
7p
C136
5p
C139
470p
C135
5p
L24
27n
L28
12n
L29
15n
L27
680n
R353
0
+B
5T
VGG
VDD
ANT
RF SW
RF SW
RF AMP
5R
DRIVE
AMP
Q10 OPERATION SW
5T
VOLTAGE
DROP
DRIVE
AMP
5T
OVER INPUT
PROTECTION
ANTENNA SW
D12,13
ANTENNA SW
ANTENNA SW
5T
POWER
AMP
Q12 GATE
VOLTAGE SW
APC
+B
KAPC(APC KILL)
1st MIXER
RX 1st AMP
5R
TEMP COMPENSATION
KAPC
5R
X57-675X-XX
APC
DIFFERENTIAL
AMP
APC OUTPUT SW
VGG
APC
CIRCUIT
OPERATION
SWITCH
5T
5T
BPF/APC
TH-K4AT
TH-K4E
FINAL
TEMP
B+IN
B-IN
BOUT
V+
D14
REVERSE CURRENT PREVENTION
APC OUTPUT
VOLTAGE LIMITTER
D15
1st IF
38.85MHz
D18,19
RX BPF TUNING
RX BPF TUNING
D20,21
0-21
2-71 E
M2
NO
D44
B30-2205-05
NO
B30-2205-05
D47
MA2S111
NO
D60
MA2S111
D62
NO
D63
MA2S111
NO
R230
220
NO
C374
NO
100p
C512
100p
NO
Reference voltage value are measured when the power supply voltage is 13.8V(DC IN).
2.03V
T:4.31V
R:0V
1.43V
T:4.86V
R:0V
1.98V
10.37V
4.91V
10.56V
T:0V
R:0V
4.56V
2.80V
4.30V
4.56V
3.10V
3.14V
2.30V
(HIGH POWER)
Note : The components marked with a
dot (
● ) are parts of layer1.
X57-675 5/5
TX-RX UNIT (X57-675X-XX)(A/3)