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SCHEMATIC DIAGRAM - 3
: +B SIGNAL
MAIN CIRCUIT
: -B SIGNAL
SA-AK640E/EB/EG MAIN CIRCUIT
1/4
C2114
C2214
0
R2111
2.2K
W2501
0
PB_L
14
PB_R
13
GND
12
REC_IN_L
11
REC_IN_R
10
TO
+B
9
DECK
REC_H
CIRCUIT
8
(CN1001) ON
MO+B
7
SCHEMATIC
MO_GND
DIAGRAM-7
6
NC
5
DECK1_H
4
NC
3
MOTOR
2
NC
1
CN2803
R2122
C2121
3.3K
3300P
R2222
C2221
3.3K
3300P
R2121
R2221
3.3K
3.3K
: FM/AM SIGNAL LINE
: TAPE RECORD SIGNAL LINE
: TAPE PLAYBACK SIGNAL LINE
: MAIN SIGNAL LINE
C2112 1
C2212 1
C2122 1
C2222 1
C2132 1
C2232 1
C2152 1
C2252 1
0
R2211
2.2K
R2102
3.3K
R2104
27K
R2103
R2204
27K
C2201 1
R2202
3.3K
+15V
C2976
16V10
MOT_12V
P_GND
REC[59]
Q2978
B1GDCFJJ0047
REC:ON/OFF CONTROL SWITCH
SW5V
Q2980
W2553
0
MTR[58]
DECK_H
R2674
47K
: CD SIGNAL LINE
C2101
1
56
55
54
53
52
51
50
49
48
47
46
45
IN-L1
1
IN-R1
2
3
IN-L2
4
IN-R2
IN-L3
5
IC2803
6
IN-R3
C1BB00001121
7
IN-L4
AUDIO SOUND PROCESSOR
8
IN-R4
9
IN-L5
10
IN-R5
C2161 0.01
11
IN-L6
C2261 0.01
12
IN-R6
13
GND
C2581 16V100
14
REF-IN
W2506
0
15 16 17 18 19 20 21 22 23
24
25
26
C2582
16V100
W2503
0
W2520
0
W2577
R2193
R2194
0
4.7K
2.2K
R2283
100K
R2203
2.2K
C2283
0.047
C2501
R2501
R2503
D2503
1
330K
2.7K
C2503
B0ADCC000002
1
Q2501
B1ABCF000176
LEVEL METER
CONTROL SWITCH
R2504
100
R2502
82K
R2505
0
A_GND
Q2980
B1GDCFJJ0047
SUPPLY CONTROL SWITCH
(DECK MOTOR)
44
43
C2311
1
L-OUT
42
NC
41
DATA
40
CLK
39
VCC
38
R-OUT
37
C2401
0
POST-VM-R
36
C2402 1
T-OUT-R
35
C2272 0.082
BASS-R2
34
C2271 0.15
BASS-R1
33
C2274 0.01
MID-R2
32
C2273 0.01
MID-R1
31
TRE-R
30
NC
29
27
28
C2583
16V100
C2194
R2273
R2271
C2275
D2583
4.7K
6.8K
100K
0.1
3300P
B0BC9R000008
C2509
R2510
C2585
R2585
16V33
220
220P
330K
R2509
560
R2507
C2507
R2508
100K
0.22
1K
R2511
2.2K
R2584
R2586
1.2K
330K
W2546
0
W2526
0
W2511
0
Q2142
B1ABCF000176
AGC CONTROL SWITCH
R2145
R2146
Q2311,Q2411
1K
1K
B1ABGC000005
MUTING SWITCH
R2311
R2314
C2312
470
0
1
R2312
Q2311
10K
C2704
R2313
470P
100K
R2355
C2342
270K
1
C2442
R2455
270K
1
R2413
Q2411
R2412
100K
10K
R2414
C2411
C2412
1
0
1
R2411
470
C2706
R2245
1K
50V1
D2241
R2246
Q2242
B0ACCK000005
1K
B1ABCF000176
AGC CONTROL SWITCH
R2247
C2245
C2588
100K
Q2511
16V10
0.1
B1GDCFJJ0047
MUTING CONTROL
W2513
W2531
C2584
Q2341,Q2441
0
0
220P
B1ABGC000005
HEADPHONE MUTING
Q2341
Q2511
R2347
R2346
1
3.3K
R2345
1.5K
R2357
100K
W2530
R2512
0
100K
R2457
100K
R2445
C2511
R2446
1.5K
50V2.2
3.3K
N
Q2441
R2447
1
R2701
1K
C2
C2
R2702
1K
R23
56
4
3
2
IC2804
C0AABB0001
OP AMP
5
6
7
C2413
47P
R2706
3.3K
R21
3.3
R2
3.
R2248
6.8K
R2342
R
0
R2344
R
0
R2442
R
0
R2444
R
0
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