Service manual

TH-K4AT/K4E
SCHEMATIC DIAGRAM
R252
100k
Q51
RN4902
C308
470p
R238 1k
C346
470p
IC10
S-80844CNNBB85
1
OUT
2
VDD
4
VSS
3
NC
C310
1u
C302
470p
CN7
1
2
3
4
5
6
Q53
RN2701
C311
0.1u
D43
B30-2205-05
D46
B30-2205-05
MIC1
C305 470p
C313
0.039u
CN6
1
2
3
4
5
6
R263
10k
C344
470p
C309
1u
C345
470p
D72
MA2S111
R242
330k
R236
1k
IC11
S-80930CNNBG80
1
VSS
2
VDD
4
OUT
3
CD
CN8
1
2 3 4 5 6 7 8 9
10 11 12 13 14
C307
0.1u
L63
S7
S70-0485-05
C317
470p
C300
470p
D42
B30-2205-05
IC9
TK11250CM
1 2 3
4
VOUT
5
GND2
6
VIN
IC15
AT 25160N10SI27
1
2
3
4
5
6
7
8
CN9
1
2 3 4 5 6 7 8 9 10 11 12 13
14
D64
MA2S111
D48
B30-2237-05
C243
470p
C355
0.01u
C316
0.1u
R230
*
C303
150u6.3
D71
MA2S111
C319
10u10
R246
3.9k
C330
470p
CPH3317
Q55
C354
470p
R336
220
C318
470p
R328
470k
R231
150
D65
MA2S111
R255
0
IC12
TK11250CUCB
1
NP
2
GND
3
CONT
4
VIN
6
VOUT
R337
470
D60
*
C312
0.039u
D70
MA2S111
R243
330k
D63
*
C304
470p
R237 100k
C347
470p
Q57
RN2105
D69
MA2S111
C314 470p
R248
3.9k
Q41
RN2105
C348
470p
D62
*
D47
*
2SK1830
Q50
D49
B30-2237-05
C306 47p
D44
*
C371
470p
C372
470p
C370
470p
D61
MA2S111
C374
*
R241
330k
R240
100k
C299 1u
C298
470p
KIN3
GND
BL
KYO1
KYO2
KIN4
PTT
RESET
INT0
KEY LED SW
SET
LCD LED SW
5T SW
5C SW
5MS SW
EEPROM
5.0V AVR
TX-RX UNIT
(X57-675X-XX)(C/3)
MARKET CODE
DETECTION
D62-65
D69-72
PTT BOARD
REVERSE
CURRENT
PREVENTION
BIT0
KEY
ILLUMINATION
LED
D42-44,46,47
BIT3 BIT1 BIT2
TYPE
KEY
LAMP
PTT
JUMPER
MONI
MENU
4
CALL#0
TX-RX UNIT
(X57-675X-XX)(B/3)
8M
VFO
KIN4
5
MIG
F/CALL
LAMP
10KEY BOARD
GND KYO0
1/F
KIN2 KYO1
6
KIN0 KYO2
*
2/VFO
POWER SW
KIN1 IM KYO3
5R/5MV
SW
3.3V VOLTAGE DETECTION
3/MR
4.4V VOLTAGE DETECTION
5.0V AVR
V/U
5R
5MV
5T
+B
5MS
LAMP
BPF/APC
R239
QT/DQT
5MV
+B
SQV
SMV
DATA
KAPC
PLLLD
AFM
PLLEN
SHIFT
NAR
5T
5MS
TO
MOD
5R
5C
VOLIN
CLOCK
TEMP
FINAL
5M
SI
SCK
HOLD
VCCCS
SO
WP
GND
5M
+B
5C/5R/5T AVR
IM
MIG
8V
RESET
5R SW
5T SW
PWR SW
INT0
VUKEY
KIN3
KOUT0
TYPE
KIN2
KOUT3
KOUT1
KIN1
KIN0
KIN4
KOUT2
VOX
BPF/APC
EEPDI
EEPCS
5C SW
PTTI
5M
BATT
5MS SW
LAMP
5C
5MS
DATA
CLOCK
D61
UHF TYPE DETECTION
KEY TYPE DETECTION
D60
D48,49
LCD
ILLUMINATION
LED
5T
NAR
VOLIN
+B
SHIFT
PLLLD
5C
PLLEN
AFM
KAPC
DATA
QT/DQT
5MS
5R
TO
MOD
CLOCK
SMV
SQV
FINAL
TEMP
89MR
7
1k
C297
0.1u
R244
0
CONT
GND1
NP
ON:4.92V
4.80V
4.79V
4.98V
4.83V4.95V
ON:6.98V
T:0V
R:4.90V
5.03V
T:4.95V
R:0V
T:4.99V
R:0V
K L M N O
X57-675 3/5
TX-RX UNIT (X57-675X-XX)(A/3)