JVC KS-AX4500 Service Manual page 24

MAIN PCB [3/3] circuit diagrams
7
+15V
C191
104P
C192
C101 R102
JA01-A C105 U101A
8
R108
NJM2068LD 473P
4.7/50V
21.5KF 100P
SY-SW0406G 5
+ 1K
C107
- 7 4.7/50V
6 R101
6
R103 4 VR101-A
22KF
22KF 20KB
R106
C102
33KF
4.7/50V
R110
R109
C106 15KF
1.3KF
22P
R105
C104
C291
33KF
R-IN 22P
104P
-15V
JA02
R161
C161
5
LAD1140-04
68KF
4.7/50V
+ R163 R162
C162
15K 68KF
4.7/50V
- C164 C163
102P 102P
HI INPUT
C263
C264
-
102P
102P
R262
R263 C262
+ 15K 68KF
4.7/50V
R261
C261
68KF
4.7/50V
4
L-IN
U101-B
NJM2068LD
R202
C201
VR101-B
JA01-B
21.5KF
4.7/50V
8 20KB
3
SY-SW0406G
R210
C202 R203
15KF
1 R208
2
22KF
4.7/50V
1K
C207
R201
C205 R206 33KF
4.7/50V
3
22KF
100P
R209
R211
C206
R205
C204 1.3KF
12K
33KF 22P
22P
A
2
1
A B
+15V
C114 104(M)
+15V +15V
8 U104A
4558F
3
C193
R121 R122
1
2
473P 30K 30K
R113
U102A
8 C115
4558F U103A
1K 8
3 4558F
473(M)
3
1
2 1
R114
4
2
R112
1K
R123 30K
30KF C111 47P
R111 C108 U104B
VR102A R115 R116
4558F
11KF 68P
20KB
1K 20K
5
R117
C112 C116 C117
C292
7
6
100K
473(M) 473(M)
473P 224(M) 4
R118
5.6K
C294
-15V R124
C113 473P
62K
U103B
-15V
183(M) 4558F
5
7
R119
6
4
470K
C293
473P
-15V
BASS BOOST(50Hz,0-12dB/oct) LPF-FLAT-HPF
(80Hz,12dB/oct)
+15V
C214
104(M)
+15V
8
3
C208 36P
C195
R221 R222
1
473P 2
30K 30K
R212 56KF
R213
U106A
U105A C215
4558F
8
6 1K 4558F
3 473(M)
7
5 1
R214
4 2
U102B 1K
R223 30K
4558F
C211 47P
U106B
VR102B R215 R216 4558F
20KB 1K
20K
5
R217
C212 C216 C217
7
6
100K
224(M) R218 473(M) 473(M)
4
5.6K
R224
C296
62K
C213 473P
U105B
183(M)
4558F
-15V
5
R219
7
6
470K 4
C295
473P
-15V
C D E
+15V
R137
R133
1K 1K
R134
C133
5.6K
22/16V Q101
Q102
C3198GR C3198GR
C194
473P
R138 R139
22 22
SW101A C130
R131 C131
LPF
JSS2319
4.7/50V 5.6KF 4.7/50V
FLAT
HPF
R140 R141
C132
22 22
68P
R132
22KF
Q103
Q104
A1266GR
A1266GR
R135
5.6K
R142
C134
1K
R136
22/16V
Q100
1K
J108
R130
R148
-15V
10K 1KF
C139
MUTE
100/16V
+15V
R230
10K
Q200
J108
R233 R237
1K 1K
C233
R234
22/16V
Q201
5.6K Q202
C3198GR
C3198GR
C196
473P
R238 R239
22 22
SW101B
C231
LPF
JSS2319
4.7/50V
FLAT
HPF
R231
C230
5.6KF
4.7/50V
R232
22KF
R240 R241
C232
22 22
68P
Q203
Q204
A1266GR
A1266GR
R235
5.6K
R242
C234 1K
R236
22/16V
1K
-15V
R248
1KF
C239
100/16V
Caution
If electricity is connected during disassembly, it must be a no load current. If it is load
current, be sure to attach a heat sink to the power-amp IC. This will be damaged if the
above precautions are not followed, as it does not have a sub heat sink attached to it.
F G
R143
47
Q105
A1268GR Q110
Q108
C135
D998
C1027Y
150P
Q112
R152
1.5K C3200GR
R153
15K
R144
R150
3.9K D101 C140
0.1/3W
1N4148
150P
C136
R149
473(M)
220
Q107
R151
C3200GR
0.1/3W
R145
2.7K
Q109 Q111
C137
A1023Y B778
150P
Q106
C3200GR
R146
47
R147 12KF
Q113
R154
C3198GR
56K
C138 56P
OFFSET
R254
C151
56K
220/16V
R243
47
Q205
A1268GR Q210
Q208
C235
D998
C1027Y
150P
Q212
R252
C3200GR
1.5K
R253
15K
R244 R250
D201 C240
3.9K 0.1/3W
1N4148 150P
C236
R249
473(M)
Q207 220
R251
C3200GR
0.1/3W
R245
2.7K
Q209 Q211
C237
A1023Y B778
150P
Q206
C3200GR
R246
47
R247 12KF
C238 56P
Indicates main signal path
H I
KS-AX4500
PROTECTION
R156 R155
4.7/0.5W
680/2W
C141
104(M)
P02
TM0009-00
Q213
C3198GR
C142
104P
CHASSIS
R255
R256
4.7/0.5W
680/2W
C241
104(M)
J
2-5