B) Main Circuit - Panasonic SA-AK240E Service Manual

17.4. (B) Main Circuit

SCHEMATIC DIAGRAM - 3
: +B SIGNAL
MAIN CIRCUIT
: -B SIGNAL
SA-AK240E/EB/EG MAIN CIRCUIT
1/4
C2114 C2214
0 0
R2112 R2212
3.3K 3.3K
R2111 R2211
2.2K 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
TUNER RCH
: FM/AM SIGNAL LINE : TAPE RECORD SIGNAL LINE : CD SIGNAL LINE
: TAPE PLAYBACK SIGNAL LINE
: MAIN SIGNAL LINE
C2101
1
C2112 1
C2212 1
C2122 1
C2222 1
C2132 1
C2232 1
C2152 1
C2252 1
R2102
3.3K
R2104 3.9K
R2204 3.9K
C2201 1
R2202
3.3K
+15V
C2976
16V10 MOT_12V
P_GND
REC[59]
Q2978
B1GDCFJJ0047
REC:ON/OFF CONTROL SWITCH
SW5V
Q2980
Q2980
B1GDCFJJ0047
W2553 SUPPLY CONTROL SWITCH
0 (DECK MOTOR)
MTR[58]
DECK_H
R2674
47K
R2675
R2301
15K
56 55 54 53 52 51 50 49 48 47 46 45 44 43
IN-L1
1 L-OUT 42
2 IN-R1 NC
41
3 IN-L2 DATA 40
4 IN-R2 CLK 39
5 IN-L3 VCC 38
IC2803
6 IN-R3 R-OUT 37
C2401 0.12
C1BB00001121
7 IN-L4 POST-VM-R 36
C2402 0.22
AUDIO SOUND PROCESSOR T-OUT-R 35
8 IN-R4
C2272 0.12
9 IN-L5 BASS-R2 34
C2271 0.15
10 IN-R5 BASS-R1 33
C2161 0.01 C2274 0.01
11 IN-L6 32
MID-R2
C2261 0.01 C2273 0.01
12 IN-R6 MID-R1 31
TRE-R
13 GND 30
C2581 16V100
14 REF-IN NC 29
W2506
0
15 16 17 18 19 20 21 22 23 24 25 26 27 28
C2582
16V100
W2503
0
W2520
0
W2577 R2193 R2194 C2194 C2275
0 4.7K 100K 0.12 3900P
R2283
100K
C2509
C2283
16V33
0.047
63
B1ABCF000176
AGC CONTROL SWITCH
Q2311,Q2411
B1ABGC000005
MUTING SWITCH
R2311
C2311
1 470
R2312 Q2311
10K
R2355
C2342
270K
1
C2442
R2455
R2401 15K
270K 1
Q2411
R2412
10K
C2411
1
R2411
470
B1ABCF000176
AGC CONTROL SWITCH
C2583
16V100
R2273 R2271
D2583 C2588
Q2511
4.7K 15K
B0BC9R000008 0.1 B1GDCFJJ0047
MUTING CONTROL
C2585 R2585 C2584
R2510
220P 330K 220P
R2509 220
560
Q2511
R2347
1
R2511 R2512
100K
2.2K
C2511
50V2.2
R2584 R2586
330K 1.2K
N
W2546
0
W2526
0
SA-AK240E / SA-AK240EB / SA-AK240EG
W2511
0
R2701
1K
C2
C2
Q2142
R2702
1K
R23
56
R2145 R2146
1K
10K
R2314 C2312
0
1
4 3 2
C2704
R2313
470P
100K
IC2804
C0AABB0001
OP AMP
R2413
100K
R2414 C2412 5 6 7
0 1
C2413
47P
R2245 C2706
1K 50V1
R2706
3.3K
D2241 R2
R2246
Q2242
B0ACCK000005 3.
1K
R2
3.
R2247 C2245 R2248
100K
16V10 6.8K
R2342 R
W2513 W2531
33
Q2341,Q2441 0 0
B1ABGC000005
HEADPHONE MUTING
R2344 R
33
Q2341
R2346
3.3K
R2345
1.5K
R2357
100K
W2530
0
R2457
100K
R2445
R2446
1.5K
3.3K
Q2441
R2442 R
33
R2444 R
33
R2447
1