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15
16
17
SCHEMATIC DIAGRAM - 3
MAIN CIRCUIT
: +B SIGNAL LINE
TO MAIN SECTION (1/4)
C1
C2
C9
18
19
20
: TAPE RECORD SIGNAL LINE
: MAIN SIGNAL LINE
R2335
R2331
1k
0
C2331
Q2317,Q2417
4700P
R2333
B1ABCF000176
15k
MUTING SWITCH
R2316
2.2k
R2433
15k
C2431
R2435
R2317
Q2317
1k
4700P
R2431
18k
R2318
100k
0
R2329 C2321
R2321
0
3.3K
1
R2356
180k
C2323
W586
R2456
180k
0
R2417
C2423
18k
R2418
R2429
100k
3.3K
Q2417
R2416
2.2k
C2421
R2421
1
0
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
16V10
LOW_L-IN
R2326
8
9
LOW_R-IN
10K
10
A_GND
R2323
0.015
11
SUBW
39k
12
FAN
R2423
R2428
39k
0.015
15k
R2426
10K
C2425
16V10
C2943
50V2.2
67
24
25
26
C3711
R3720
1u
0
MIC_MIX
R3700
C3700
1k
1u
REC_L
C3704 R3706
1u
68k
REF_L
R3702
10K
R3703
TO
C3701
68K
1u
POWER
REF_R
CIRCUIT
R3701
(CN5102)
A_GND
1K
IN SCHEMATIC
R3707
W673
R3704
C3705
DIAGRAM-9
68K
0
10K
1u
REC_R
K3705
R3711
+15V
0
47K
C3710
0.1u
R3712
47k
W654
0
1/4
2/4
SA-AK450GCP MAIN CIRCUIT
3/4
4/4
SA-AK450GCP
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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