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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
C2431
R2435
R2317
Q2317
1k
6800P
R2431
10k
R2318
100k
0
R2321
R2329 C2321
0
8.2K
0.22
R2356
180k
W586
R2456
180k
0
R2417
C2423
18k
R2418
R2429
100k
8.2K
Q2417
R2416
2.2k
C2421
R2421
0
0.22
C2324
R2327
12k
1u
C2424 R2427
12k
1u
C2731
R2731
50V100
100
R2721
IC2810
1k
COABBB000244
SMT OP-AMP IC
R2561
C2551
C2552
27k
10
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
: MIC SIGNAL LINE
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
11
SUBW
39k
12
FAN
R2423
R2428
39k
0.01
15k
R2426
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
Q2555
B1ABCF000176
SUBW MUTING SWITCH
69
24
25
26
C3711
R3720
1u
0
MIC_MIX
R3700
C3700
1k
1u
REC_L
C3704 R3706
1u
68k
REF_L
R3703
TO
C3701
68K
1u
POWER
REF_R
CIRCUIT
R3701
(CN5102)
A_GND
68k
IN SCHEMATIC
R3707
W673
R3704
C3705
DIAGRAM-9
0
10K
1u
1k
REC_R
K3705
R3705
R3711
+15V
0
68K
47K
C3712
C3710
100u
0.1u
R3712
47k
W654
0
1/4
2/4
SA-AK750PL MAIN CIRCUIT
3/4
4/4
SA-AK750PL
27
28
A
B
R3708
68k
C3706
47p
C3708
10p
4
3
2
1
IC3700
IC3700
C0ABBB000244
SMT OP AMP IC
C
5
6
7
8
C3709
10p
C3707
47p
R3709
68k
D
E
F
G
H
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