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SA-AK250GCP
19.2. (B) Main Circuit
1
2
3
SCHEMATIC DIAGRAM - 2
A
MAIN CIRCUIT
B
C
QR3105,QR3106
KRC101STA
SWITCH
D
QR3106
QR3105
PL
1
MOTOR_H
2
MO_GND
3
R2111
4
DECK_AD2
2.2K
MOTOR 9V
5
DECK_AD1
6
R2211
+9V
7
PB_L
2.2K
PB_L
8
PB_R
R2112
TO
PB_R
9
E
A_GND
5.6K
DECK CIRCUIT
A_GND
10
(CN1305)
A_GND
11
IN SCHEMATIC
REC_IN_L
12
DIAGRAM-10
REC_IN_R
13
REC_H
14
BP
15
DMT
16
DVREF
17
VREF-GND
18
DGND
19
+5V
20
PHOTO
21
CN2803
F
G
H
4
5
6
: +B SIGNAL LINE
: CD SIGNAL
: TAPE RECORD SIGNAL LINE
W581
0
R2161
15K
MIC
C2263
50V1u
R2163
56K
MIC_MIX
56
55
54
53
C2112 1u
1
C2212
1u
2
C2122
1u
3
C2222
1u
4
IN-R2
[1] IN-L1
C2132
1u
5
[2] IN-R1
IN-L3
C2232
1u
[3] IN-L2
6
IN-R3
C2152
1u
7
IN-L4
C2252
1u
8
IN-R4
W619
[12] IN-R6
9
IN-L5
[13] GND
10
IN-R5
[14] REF-IN
C2142
1u
0
11
IN-L6
C2242
1u
12
W582
13
C2581
0
14
16V100
C2213
6800P
15
16 17
18
C2582
16V100
R2102
2.2K
R2204 C3720
0
27K
1
0
R2104
C3721
1
C2282
W667
27K
0.33
0
REC_L
PL
W674
MTR[58]
REC_R
0
OUT
3
C2805
16V470
REF_L
2
GND
VCC
1
IC2872
REF_R
+9V
AGND
W689
P_GND
DECK_AD2
0
DECK_AD1
W575
A_GND2
REC_IN_L
0
REC_IN_R
DMT
DVREF+
U_GND
REC[59]
W661
W656
+5V
0
0
+3.3V
W592
0
PHOTO
IC2872
C0CBAHG00011
VOLTAGE REGULATOR
A_GND1
TO MAIN SECTION (3/4)
7
8
9
: TAPE PLAYBACK SIGNAL LINE
: FM/AM SIGNAL LINE
: MAIN SIGNAL LINE
R2173
4.7K
R2172
15K
C2181
R2301
Q2311,Q2411
1
15K
B1ABGC000005
MUTING SWITCH
C2302
0.22
C2311
R2311
1u
470
52
51 50
49
48
47
46
45
44
43
IC2803
R2312 R2355
C2342
42
C1BB00001121
10k
270K
1u
41
AUDIO SOUND PROCESSOR
40
A_GND
[42] L-OUT
39
[41] NC
R2412
38
[40] DATA
VCC
10k
[39] CLK
R-OUT
37
R2401
IC2803
C2401
0.22u
R2455
C2442
POST-VM-R
36
C2411
270k
1u
C2402
0.22u
15K
1u
[32] MID-R2
T-OUT-R
35
C2272
0.056
[31] MID-R1
BASS-R2
34
[30] TRE-R
R2411
C2271
0.33
BASS-R1
33
470
[29] NC
32
31
30
29
Q2142,Q2242
B1ABCF000176
19
20
21 22
23
24
25 26
27 28
C2195
AGC CONTROL SWITCH
R2195
0.47u
10k
W583
R2196
0
10k
C2194
0.12
W651
W597
R2283
R2194
100k
100k
0
0
C2283
R2510
0.047u
220
C2509
D2191
50V33
Q2511
W678
B0ACCK000005
0
B1GDCFJJ0047
R2509
MUTING CONTROL
560
R2511
560
R2512
100k
C2511
50V2.2
W1
REXV0092
W671
0
QR2501
QR2501
B1GDCFJJ0047
W685
0
SWITCH
W686
0
QR2502
QR2502
W687
B1GBCFGN0016
0
SWITCH
66
10
11
12
: AUX SIGNAL LINE
: MIC SIGNAL LINE
IC2804
C0AABB000125
C2705
1u
OP AMP
C2313
R2315
C2315
R2705
R2703
68K
50V22
220K
47P
3.3k
C2314
C2703
10P
Q2311
470P
W584
C2312
0
4
3
2
1
1u
R2313
100k
IC2804
R2413
100k
C2412
5
6
7
8
1u
C2414
W589
Q2411
R2704
10P
220k
C2413 R2415
C2415
0
47P 68K
50V22
C2704
C2706
R2706
470P
D2241
1u
3.3K
R2245
B0ACCK000005
R2249
R2145
3.3K
1K
R2146
1K
1K
Q2142
R2149
R2246
D2241
3.3K
1K
W591
0
Q2242
C2245
R2248
16V10
R2247
100k
6.8k
W600
W590
0
R2701
0
1k
W669
Q2341,Q2441
0
B1ABGC000005
W670
0
HEADPHONE MUTING
R2347
R2341
R2352
Q2341
18
18
1
R2345
1.5k
R2346
L
R2344
R2343
R2354
R2353
3.3k
0
18
18
0
C2341
1000P
C2441
R2446
1000P
R2452
R
3.3k
18
R2453
R2447
Q2441
R2441
R2445
0
1
1.5k
18
R2444
R2443
R2454
0
18
18
13
14
C1
TO MAIN SECTION (2/4)
C2
C6
C7
C9
1/4
2/4
SA-AK250GCP
MAIN CIRCUIT
3/4
4/4
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