Panasonic SA-AK22 Service Manual page 107

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SCHEMATIC DIAGRAM - 5
MAIN CIRCUIT
R379
R373
R372
4.7K
15K
10K
C363
100P
C364
100P
<0.07V>(0.07V)
((0.07V))0.07V
C356
33
0.22
32
OUTL
<4.53V>(4.53V)
C231
((4.53V))4.53V
31
OUTR
<4.53V>(4.53V)
16V10
((4.53V))4.53V
VCC
30
<9.05V>(9.04V) C353
((9.04V))9.04V
CAP 29 0.1
<4.52V>(4.52V)
((4.50V))4.51V
FILTER 28
<4.52V>(4.52V)
((4.52V))4.52V
BASS5
27
<4.53V>(4.52V)
((4.53V))4.53V
BASS4
26
<4.5V>(4.49V)
((4.49V))4.49V
BASS3 25
<4.53V>(4.51V)
((4.54V))4.54V
BASS2 24
<4.51V>(4.52V)
((4.51V))4.51V
BASS1
23
<4.52V>(4.53V)
((4.52V))4.52V
HPFR3
22
<4.52V>(4.53V)
((4.52V))4.52V
HPFR2
21
<4.51V>(4.51V)
((4.50V))4.51V
HPFR1 R375
20
<4.52V>(4.52V)
15K
((4.52V))4.52V
HPFL3 19
<4.52V>(4.53V)
((4.52V))4.53V
18 C348
HPFL2
<4.52V>(4.51V)
0.068
((4.52V))4.51V
HPFL1
17
C347
<4.52V>(4.52V)
C346
0.068
((4.52V))4.52V
0.068
16
R374
15K
C345
0.068
C344
0.068
C343
0.068
C374
1000P
: +B SIGNAL LINE
TO
PANEL CIRCUIT
(CP607) ON SCHEMATIC
DIAGRAM-8
24 23 22 21 20 19 18 17 16 15 14 13 12 11 10
R392
47
R222
4.7K
R391
47
C226
0.068
C426
0.068
D317
UDZSTE179R1B
R422
4.7K
C431
16V10
R227
C355 16V10
6.8K
R427
6.8K
R385
C354
47K
10V220
C350
R384
47K
R381
47K
R382
47K
R378
27K
Digitized in Heiloo, Holland
: -B SIGNAL LINE
CN302
9 8 7 6 5 4 3 2 1
C375
1000P
C228 R225
R224
1.5K
15K
16V10
C229
C230
100P
47P
R450
120
R223
47K
4 3 2 1
C318
0.01
R451
120
IC302
R423
47K
M5218AP
5 6 7 8
BUFFER AMP
C429
C430
Q200
100P KTD1304TA
47P
C428 R425
R424 MUTING SWITCH
HIGH-CHANNEL RCH
1.5K
16V10 15K
C320
0.01 Q400
KTD1304TA
MUTING SWITCH
HIGH-CHANNEL LCH
: MAIN SIGNAL LINE
(0V)<0V>
0V((0V))
R453
[0V]
22K
R253
R250 R249
R449
22K
39 120 39
(0V)<0V>0V
C232
C432 ((0V))[0V]
3300P 3300P
(0V)<0V>0V
R248
R448 R251
((0V))[0V]
120 39
39
Q450
(0V)<0V>0V
IC302
((0V))[0V]
R233
22K
C238
(0V)<0V>
0V((0V))[0V]
16V10
R220
Q200
33K
C237
1000P
(0V)<0V>
0V((0V))[0V]
C437
R420
Q400
1000P
33K
C438
16V10
R433
22K
KRA102STA
AUDIO MUTING CONTROL
R355
22K
R353
R354
10K
12K
R358
47K
C365
0.47
R359
47K
14 13 12 11 10
9 8 7 6
CN309
TO
CD LOADING CIRCUIT
(CN1) ON SCHEMATIC
DIAGRAM-12
12/10/2014
Q250
KTD1304TA
Q250
HP MUTING
SWITCH RCH
(-3.76V)<-3.76V>
-3.76V((-3.76V))[-3.76V]
R226
Q450
100
KTD1304TA
HP MUTING
SWITCH LCH
(-3.76V)<-3.76V>
-3.76V((-3.76V))[-3.76V]
R426
100
H_OUT_R
C225
50V3.3
(-3.76V)<-3.76V>
-3.76V((-3.76V))[-3.76V]
R221
1K
(0V)<0V>
0V ((0V))[0V]
(-3.77V)<-3.77V>
-3.77V((-3.77V))[-3.77V]
R421
1K
(0V)<0V>
0V((0V))[0V]
H_OUT_L
C425
50V3.3
-9V
R329
1M
(-3.76V)<-3.76V>
Q306
-3.76V((-3.76V))
MUTEA
[-3.76V]
(-0.39V)<-0.39V>
-0.39V((-0.4V))
[-0.39V]
R328
C317
33K
50V2.2
(0V)<0V>
0V((0V))
[0V]
Q306
R346 R351
22K 10K
R347 12K
5 4 3 2 1