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15
16
17
SCHEMATIC DIAGRAM - 3
MAIN CIRCUIT
: +B SIGNAL LINE
TO MAIN SECTION (2/4)
C1
C2
C3
C4
C5
C6
C7
C8
C9
18
19
20
: TAPE RECORD SIGNAL LINE
: MAIN SIGNAL LINE
R2335
R2331
1k
0
C2331
Q2317,Q2417
6800P
R2333
B1ABCF000176
15k
MUTING SWITCH
R2316
2.2k
R2433
15k
R2317
C2431
R2435
10K...EG
Q2317
1k
6800P
R2431
18K...E/EB
R2318
100k
0
R2329 C2321
R2321
0
8.2K
0.22
R2356
180k
C2323
W586
R2456
180k
0
R2417
10K...EG
C2423
18K...E/EB
R2418
R2429
100k
8.2K
Q2417
R2416
2.2k
C2421
R2421
0.22
0
C2324
R2327
12k
1u
C2424 R2427
12k
1u
C2731
R2731
50V100
100
R2721
IC2810
1k
COABBB000244
SMT OP-AMP IC
R2561
C2551
C2552
27k
2.2
100p
R2722
1k
5
6
7 8
C2722
0.01u
IC2810
C2721
100
R2565
4 3
2 1
220k
R2562
C2555
100p
C2560
1u
C2556
R2563
C2558
0.01u
47k
0.15u
Q2551,Q2552
B1GDCFJJ0047
SWITCH SUPPLY SWITCH
TO MAIN SECTION (4/4)
21
22
23
R2334
W587
C2333
1u
0
0
CN2809
1
F_HOP
2
T-GND
3
MUTE-D-AMP
C2433
4
+15V
1u
R2434
5
HIGH_L-IN
6
HIGH_R-IN
0
A_GND
ASP_GND
C2325
7
50V1
LOW_L-IN
R2326
8
9
LOW_R-IN
0
10
A_GND
R2323
0.01
11
SUBW
39k
12
FAN
W673
0
R2423
R2428
39k
W654
0.01
15k
R2426
0
0
C2425
50V1
C2943
50V2.2
Q2553,Q2554
B1ABCF000176
SUBWOOFER LEVEL
R2560
CONTROL SWITCH
3.3k
D2551,D2552
B0BC2R4A0006
R2558
3.3k
Q2553
Q2554
R2556
1k
Q2555
47k
R2568
100k
R2588
R2566
180k
2.2k
Q2552
R2567
18k
Q2551
K3301
0
SW_LV2
Q2555
B1ABCF000176
SUBW MUTING SWITCH
69
24
25
26
TO
POWER
CIRCUIT
(CN5102)
IN SCHEMATIC
DIAGRAM-9
1/4
2/4
SA-AK750E/EB/EG
3/4
4/4
SA-AK750E / SA-AK750EB / SA-AK750EG
27
28
A
B
C
D
E
F
G
H
MAIN CIRCUIT
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