Technics SH-DV250

SCHEMATIC DIAGRAM-7
IC301
M5218AP
BUFFER AMP
A
B
1234
5 6 7 8
IC302
NJM4558MTE1
BUFFER AMP
C
D
1234
5 6 7 8
Q313,314
2SD2144STA
ATTENUATOR
F
C305
100P
R315
270K
C307
10P
C303
50V4.7
C310
0.01
C306
100P
R316
270K
C308
10P
C309
0.01
C304
50V4.7
R314
3.9K
R310
560
R308
1K
R307
1K
R309
560
R313
3.9K
R306
1K
R305
1K
R304
22K
R303
22K
C301
50V4.7
C302
50V4.7
Q301,302
2SD2144STA
MUTING
Q301
Q302
Q303
Q304
Q303,304
2SD2144STA
ATTENUATOR
R349
12K
R352
10K
D301
MA700ATA
R353
220K
C329
16V22
R348
2.2K
R325
1K
R327
560
C313
16V10
C315
100P
C317
5600P
R329
560K
R335
1K
R336
1K
R338
470
R322
8.2K
R334
56K
R323
12
R324
12
R326
1K
C328
16V22
R328
560
C314
16V10
C316
100P
R330
180K
C318
27P
R332
2.2K
C320
16V10
R350
10K
C327
0.033
D302
MA165TA
R351
220K
C323
0.01
C324
0.01
R319
150K
C312
16V22
R318
100
Q306
UN411FTA
ATTENUATOR CONT.
Q305
UN411FTA
MUTING CONT.
C311
16V10
R317
22K
R312
1.8K
Q309
Q310
Q307
Q308
Q307,308
2SD2144STA
ATTENUATOR
A
B
R354
15K
R347
1K
R345
1K
R346
1K
Q313
Q314
Q309,310
2SD2144STA
ATTENUATOR
L301
3.3
H
R311
22K
MAIN CIRCUIT
B
R331
2.2K
C319
16V10
R337
390
L302
3.3 H
E
C321
16V10
R372
0
R333
56K
C322
16V10
R374
0
O
R866
22K
N
A
B
C
:NEGATIVE VOLTAGE LINE:POSITIVE VOLTAGE LINE :CD PLAYBACK SIGNAL LINE
0V
0.6V
0V
0.6V
0V
0V
0.6V
0.6V
0V
0V
0V
0V
0V
0V
0V 0V
0V 0V 9.4V
- 10.4V
0V 0V
0V 0V 9.4V
- 10.4V
0V
0V
0.6V
0.6V
0.6V
0.6V
0V
0V
1.2V1.3V
0V
1.1V 0.9V
-
10.4V
9.4V