Service manual

TH-K4AT/K4E
SCHEMATIC DIAGRAM
R126
27k
C26
470p
CP2
3.9k
C17
470p
D5
HSC277
L58
820n
C54
470p
C24
470p
C52
10p
C167
0.1u
2SC4617(R)
Q4
C191
0.01u
C187
2p
R127
47
L64
4.7u
R115 5.6k
2SC5488
Q6
C19
8p
2SC5488
Q2
D16
MA2S111
C170
0.068u
R117
2.7k
(D)
Q22
RN2105
C180
120p
C186
24p
C1
0.01u
C11
470p
R20
1k
C168
0.1u
C46
100p
CP1 2.7k
R15
5.6k
R5 100k
R124
3.3k
C41
4.7u6.3
C27
10u10
L46
560n
CF1
L72-0968-05
L9
22n
C4
470p
R9
150
R135
470k
C45
100p
R116
120k
R346
100
R37 27k
R18 33
R7
47k
C190
0.01u
C20
5p
R36 10
C22
4p
C174
180p
R6 1k
C10
0.01u
R119
1.8k
C175
22p
C56
470p
C124
0.1u
C176
0.1u
C42
470p
R125
560
C13
0.5p
(B)
C40 0.1u
R11 150k
C173
180p
2SC4617(R)
Q21
X1
12.8MHz
L77-1931-05
VC
GND
OUTPUT
VCC
R132
2.2k
R122
2.7k
LV
2SK1830
Q3
2SC5488
Q5
2SC5488
Q24
R128
3.3k
R38 27k
R130
100
C37
470p
C182
0.1u
R188 47
R118 27k
L53
12n
R17
3.3k
C51
22p
C172
1800p
C183
0.1u
C169
0.068u
R32
1k
R120
2.7k
R133
1k
C21
470p
C6 470p
D7
MA2S111
C7
0.5p
(B)
R12
47
C166
0.01u
IC1
LMX2316TMX
1 2 3 4 5 6 7 8
GND3 CE CLK DATA LE FO/LD VCC2 VP
C43
0.01u
C50
22p
IC3
TA 31 13 6FN
1 2 3 4 5 6 7 8
9
AFOUT
10
QUAD
11
IFOUT
12
RSSI
13
N-DET
14
N-REC
15
GND
16
MIXIN
R8 100k
R10
47
C189
470p
C171
470p
R134
390k
R4
1k
R131 330k
C57
10p
2SK1830
Q20
R16
270
L67
C30
470p
R21
4.7k
R35 120k
R14
3.3k
C15
12p
R189
0
R19
120k
C38
0.01u
C188
24p
C5
0.1u
R123
1.8k
KTC4082
Q23
CD1
450kHz
VR1
100k
C44
100p
C194
0.1u
C25
470p
C18 470p
C14
470p
L8
18n
C55
0.01u
L45
560n
C192
0.01u
C29
22u6.3
L5
270n
2SK508NV(52K)
Q1
L6
270n
C8 5p
(B)
C3
2p
(B)
L3
22n
C2
39p
(G)
L2
270n
CN15 CN17
L4
6.8n
D3
HVC376B
D4
HVC376B
D1
HVC376B
D2
HVC376B
L1
270n
C34
2.2u6.3
C33
0.22u35
R31
2.2k
C35
0.1u35
R24
1.2k
R30
1k
C9
5p
(B)
C177
10u10
C178
0.01u
C179 0.1u
D6
1SV278
IF AMP
SQ FILTER
D1-4
RF AMP
5R
VCO FREQUENCY CONTROL
SMV
RF AMP
FREQUENCY SHIFT
SQV
RIPPLE FILTER
VCO SHIFT
CONTROL SW
RF AMP
AF MUTE SW
VCO
SHIFT
VOLIN
+B
5T
2nd L.O.
PLLEN
DATA
CLOCK
PLLLD
450kHz
AF FILTER
FM IC
PLL IC
FREQ
SPEED UP
TRIPLER
D6
VCO MODULATION
5R
5R
5R
KAPC
BPF/APC
BPF/APC
BPF/APC
PLLLD
PLLEN
SHIFT
+B
5C
NAR
VOLIN
5T
QT/DQT
5MS
5R
TO
MOD
CLOCK
DATA
KAPC
AFM
SQV
SMV
TEMP
FINAL
DATA
5R
CLOCK
TO
PLLLD
5C
SHIFT
AFM
5MS
PLLEN
MOD
NAR
QT/DQT
SMV
SQV
VOLINVOLIN
PLLLD
CLOCK
5R
PLLEN
AFM
5C
SQV
SMV
QT/DQT
NAR
DATA
BPF/APC
SQV
SMV
NAR AFM
5R
BPF/APC
OSCIN
OSCOUT
MIXOUT
VCC
IFIN
DEC
FILOUT
FILIN
FLO
CPO
GND1 GND2
FIN FIN
VCC1
OSCI
D16
PLL LOCK DETECTION
KAPC
TEMP
FINAL
FINAL
TEMP
9
10 11 12 13 14 15 16
WIDE/NARROW
CHANGEOVER SW
1.51V 4.81V
T:0V
R:4.62V
4.63V
3.76V
4.63V
0.72V
0.51V
4.77V
W:115mV
N:4.94V
4.81V
TX-RX UNIT (X57-675X-XX)(A/3)
X57-675 4/5
P Q R S T