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TH-K2AT/K2E/K2ET
SCHEMATIC DIAGRAM
A B C D E
1
2
3
4
5
6
7
X57-674 1/5
-t
5MS
5R
F1
2.5A
J2
L50
D32
RB051L-40
R210
12
D31
DA221
R226
220
D40
B30-2156-05
D41
B30-2157-05
R227
100
R190
47k
C236
0.01u
C235
0.01u
R191
47k
2SB1184(Q,R)
Q37
D34
MAZS0270H
C246
100u10
R217
820
R167
180k
C212
0.012u
R165
820k
C211
2200p
R144
0
C228
0.1u
C207
0.01u
C220
4700p
C221
0.01u
R192
470
2SC4617(R)
Q30
R156
100k
C201
1200p
D24
MA742
C219
0.047u
2SK1830
Q27
2SC4919
Q29
C230 1u
R185 270k
R181
470
R147
470
R137
4.7k
R180
39k
R179
220k
R148
150k
C209
1000p
R151
680
R197
100
R152 150k
R173
15k
R182
1k
C226
0.1u
R161
1k
C206
0.015u
R195
100
C229
0.1u
R174
560k
R140
180k
C195
10u10
R141
18k
C196
6800p
C197
6800p
R146
18k
R207
1k
R145
4.7k
CN2
1
2
IC6
TA7368F
1
2
3
4
5
6
NF
7
PHASE
8
PRE-GND
9
PW-GND
10
POUT
C255
10u10
R206
15
C253
10u10
C252
100p
L49
R205
100
C249
1000p
D26
1SS388
C248
0.1u
2SK1830
Q31
C247
0.1u
R203
470k
D25
MA2S111
R204
180k
R202
47k
R199
1k
R160
4.7k
C205
0.047u
R178
0
C225
1u
IC5
NJM2107F
1
2
3
4
5
V+
C202
270p
R155
100k
R153
1k
R168
180k
C203
120p
R157
330k
R158
330k
C204
0.033u
R159
120k
CN1
1
2
3
4
5
6
C210
0.01u
R166
820k
C213
4.7u6.3
C256
1000p
C257
1000p
C258
0.1u
R209
100k
R208 10
F3
0.5A
C198
1u
C250
1u
C240
1000p
C270
1000p
C271
1000p
C279
1000p
C280
1000p
R257
*
R258
*
R259
*
R260
47k
R261
*
C238
1000p
C241
1000p
R201
4.7k
C242
0.01u
C237
10u10
R193
1.8k
R224
18k
R223
220k
C239
1000p
2SB1184(Q,R)
Q33
2SK1830
Q34
R211
470k
D33
RB051L-40
C276
1000p
2SJ347
Q36
R272 4.7k
C272
470p
C290
1000p
C291
1000p
C320
*
C321
*
R177
10k
R212
10k
R214
10k
R162
180k
R163
560k
R196
10k
R216
10k
R200
10k
R194
10k
R213
22k
IC17
NJM2902V
1
2
3
4
V+
5
6
7
8
9
10
11
GND
12
13
14
CPH3417
Q56
C331
1000p
R215
470k
R273
1k
2SC4617(R)
Q38
Q47
RN1701
C208
82p
IC16
NJM2904V
1
2
3
4
GND
5
6
7
8
V+
C338
1u
J3
MIC
J4
SP
R324
47k
C339
0.047u
R330
470
C193
4.7u6.3
R332
15
C349
0.1u
C350
*
C351
0.01u
C352
1000p
C353
1000p
R335
1k
D27
RB706F-40
TH3
100k
D30
RB521S-30
2SK1830
Q35
R171
56k (D)
R170
47k
(D)
D22
1SS361
C358
0.047u
VR5
50k
VR6
100k
R142
4.7k
R149
47k
R143
470
C231
1000p
C223
1000p
C224
0.1u
R176
820k
R175
2.2k
C222
0.01u
D36
RB521S-30
D35
RB521S-30
C286 1u
C283 1000p
C282 1000p
C285
1000p
C284
1000p
C281
1000p
IC4
XC6202PB52FR
1
2
4
GND
3
R264
*
Q59
*
R344
*
C511
*
C512
*
C517
*
R349
0
D74
DA221
D79
DA221
C505
0.047u
R354
0
D80
RB521S-30
C506
1000p
C232
1000p
C218
1000p
R218
0
R198
10k
R164
10k(D)
CHARGE SW
DC IN
TX LED
BUSY LED
SP MUTE SW
DCS BAL
SPG
AFO
SPK
REM/TXD
IM
MAX DEV
DTMF/1750
MIC
PTT
T0
SP
MOD
VOLOUT
MIC
MUTE
SW
WX1050Hz
5MV5MV
VOX
DETECTION AMP
DTMF/BEEP/1750/W-ALT
AF AMP/
LAMP AVR
8V
5C/5R/5T AVR
5MS
RXD
REM
TXD
PTTE
BTEMP
CHARGE
VOLIN
8 OHM
SPG
SPK
BATTERY
TERMINAL
5MS
11.5V AVR
RXD
PTTE
IM
TXD
SPM
MIG
ENCA
ENCB
5MS
IM
VOLOUT
MIG
MICM
NAR
W/N
TX-RX UNIT (X57-674X-XX)(A/3)
5C/5R/5T AV
R
HPF
AF AMP
MIC AMP
CTCSS/DCS/WX FILTER
REM
DTMF/BEE
P
WIDE/NARROW
CHANGEOVER SW
Q56 OPERATION SW
Q31
CONSTANT-
CURRENT
CIRCUIT
Q33 OPERATION SW
NI-MH
TEMPERATURE
DETECTION
DC IN
DETECTION
REVERSE
CURRENT
PREVENTION
D33,35,36
Q36
AVR
CONSTANT-
VOLTAGE
Q37 OPERATION SW
Q38
Q37
TX/BUSY
LED SW
WX DETECTION AMP
MIC MUTE
CONTROL
MIC ALC
RECTIFICATION
D27
D24
VOX DETECTION
RECTIFICATION
SP MUTE
SPEED UP
C246 DISCHARGE
D26
REVERSE CURRENT
PREVENTION
REVERSE CURRENT
PREVENTION
LIMITER
D74,79
REVERSE CURRENT
PREVENTION
D80
5T
VOUT
VSS
VIN
1
VCC
VIN
RIPPLE
VOLIN
ENCA
NAR
ENCB
MOD
TO
5MS
QT/DQT
ENCB
ENCA
QT/DQT
5R
5T
5MS
5C
MOD
TO
NAR
VOLIN
VOXIN
SIGIN
TONE
REM
5MV
RXLED
NOAA
MICM
+B
5M
AFAMP
CHARG
E
BTEMP
BTDET
DCDET
+B
RXD
SPM
TXD
IM
PTTE
MIG
8V
ROTARY
ENCODER
&
VOL KNOB
VOLOUT
VOLIN
ENCB
GND
ENCA
GND
R169
100k(D)
R186
68k
-t
C227
2.2u4
R183
33k
TH4
100k
R353
33k
R172
10k
13.43V
13.8V
T:0V
R:4.89V
11.45V
7.07V
13.58V
4.80V
7.07V
3.23V
T:4.92V
R:0V
2.08V
T:73mV
R:3.39V
T:3.29V
R:110mV
T:4.96V
R:0V
4.31V