Service Manuals, User Guides, Schematic Diagrams or docs for : Kenwood 430MHz FM Transceiver 430MHz FM Transceiver Kenwood TH-K4AT & K4E B51-8660-00-SDP
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A B C D E
TH-K4AT/K4E SCHEMATIC DIAGRAM
1 TX-RX UNIT (X57-675X-XX)(A/3)
MOD MOD
VOLIN VOLIN
5MS 5MS
5T
+B
NAR NAR
TO TO
QT/DQT
5R
5C
5MV
ENCA ENCA
ENCB ENCB
SIGIN
R172
R170
10k
5MS
2.02V 56k
R171
C213
4.7u6.3
B30-2156-05
B30-2157-05
39k
T:0V (D)
(D)
R:4.90V
D40
D41
TX LED BUSY LED
C351
R157
0.01u
C203
120p
330k
2
R226
R227
100
220
C331 R158
R165 330k T:73mV T:3.29V
470p
R:3.39V R:110mV
R159
0.033u
C204
120k
8
7
6
5
820k
V+
R166
820k
RN1701
TX/BUSY
Q47
IC17
NJM2904V LED SW
R167 R168 R324 C349 QT/DQT
GND
CTCSS/DCS FILTER
180k 180k 47k 0.1u
2200p
C211
C212 C290
0.047u
C291
C339
1
2
3
4
5T RXLED
0.012u 470p 470p
C195 R141
T0
10u10 1k R142 R145 R146
R140
TONE
10k
TH2
DTMF/BEEP
100k
-t
1k 4.7k 4.7k REM
C196
C197
0.027u
0.027u
VOXIN
R143
R139
4.7k
DCS BAL
3 27k VR6
50k
MIC AMP
IC16
NJM2904V R163
T:4.95V
VOLIN
ENCB
ENCA
R330 R153 R154 C198 1
MOD
8
NAR
5MS
R:0V 470k
V+
1k
R137
470 4.7k 1u C201 2 7 C208
TH3
100k
R151
C200
4.7k
-t
0.01u
1.2k
C193 R144 R147 1200p 3 6 82p
R155 R156
R148
4.7u6.3 0 10k VR5 4 5 R164
5.6k
50k Q27 100k 100k GND
ROTARY
2.2k
2SK1830 C202 47k
ENCODER MAX DEV
R273
&
1k
W/N 270p C210 0.01u
R152
VOL KNOB
ENCA 6
WIDE/NARROW C209 470p
GND 5 CHANGEOVER SW
ENCB 4 C235 C236 REM
T:4.95V 5MV
VOLIN 3 0.01u 0.01u C220 R:0V C205 R161 C206
VOLOUT 2
R190 R191 4700p 0.047u 1.8k 0.018u
R180
39k
GND 1
R160
4.7k
47k 47k
4
R174
C207
0.022u
560k
HPF
CN1
IC5
220k
R179
D79,80 NJM2107F
LIMITER C358 C219
R162
C510 C221 R175 C225 R178
270k
3 4
0.047u 0.047u 0.047u 0.01u 2 2.2k 1u 0 Q30
R193
C222
0.01u
R177
1.8k
2SC4617(R)
10k
R173
1 V+ 5
15k
C231
470p
R192 VOX
DETECTION AMP
470 DTMF/1750
10u10
C237
R176
D80
820k
D79
C226
C223
C224
R181
0.1u
470p
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