Kenwood TH-K20A Service Manual page 27

F
TX-RX UNIT (X57-821X-XX)
SHIFT
THERM
5MS
5MSC
SPM
5CC
5TC
R331
56k
SB R332
56k
REM
5MS
R383
10k
INPTT
RXD
EXPTT
TXD
5RC
LSDO
CVDET
RESET
CN309
5M
5M
SB
7.51V
+B
5C
5T
5T
5R
RSSI
5T
SQL
G
SCHEMATIC DIAGRAM
76
5TC
77
VOLCS
78
VDCSW
79
CURRENT
80
VOX
81
REM
82
BATT
83
THERM
84
RSSI
85
SQL
86
LSDI
87
CVDET
KEYO4
88
KEYO4
KEYO3 89
KEYO3
KEYO2 90
KEYO2
91
VL1
92
VL2
93
VL3
94
SHIFT
KEYO1 95
KEYO1
96
VL4
KEYI1 97
KEYI1
KEYI2 98
KEYI2
KEYI3 99
KEYI3
100
KEYI4
KEYI4
KEYIT
KEYIS
CN3 04
HSDO
5M
EEPROM
CN400
C427 1000p C N40 2
C428 0.01u GND
5.0V
IC400
EX25064ATA00A
8
1 S
VCC
2 Q 7
HoLD
6
3 W
C
4 VSS 5
D
CLK
DAT
EXPTT
5C
+B
SB
GND
H
TH-K20A/K20E
SHIFT
THERM
CURRENT
LSDI
VOX
5MS
DAT
CLK
VDCSW
VOLCS
5VC
MCU
IC401
R5F2L3ACCKEKA
R419
C413
4.7k 5.01V
RESET 0.1u
MODE
C414
CN403
CN401
1000p
L77-2974-05
11.0592MHz
C412 X400
1p
R424
Q400
1k
2SC4649(N,P)
SWITCH
5R
RSSI
5T
SQL
I J
5 0 SEG15
SEG15
4 9 SEG14
SEG14
4 8 SEG13
SEG13
4 7 SEG12
SEG12
4 6 SEG11
SEG11
4 5 SEG10
SEG10
4 4 SEG9
SEG9
4 3 SEG8
SEG8
4 2 SEG7
SEG7
4 1 SEG6
SEG6
4 0 SEG5
SEG5
3 9 SEG4
SEG4
3 8 SEG3
SEG3
3 7 SEG2
SEG2
3 6 SEG1
SEG1
3 5 SEG0
SEG0
3 4
COM3
COM3
CP1
3 3 COM2
COM2
3 2
COM1
COM1
3 1
COM0
COM0
3 0
E2PIN
2 9
E2PCS
2 8
NC
2 7 LAMP
LAMP
2 6
EX
PTT
CLK
DAT
EXPTT
E2PCS
E2PIN
5C
+B
C340
R345
R347
82k 47k
0.01u
X57-821 1/1
X57-821 2/4
SHIFT
THERM
CURRENT
VDCSW
5MS
PLPS
PLLLD
DAT
CLK
PLLE
5C
LSDI
VOLCS
+B
LSDO
CVDET
5VC
VOX
5R
W/N
RSSI
5T
SQL
27