Main Circuit & Panel - Panasonic SA-PT750PL Service Manual

SA-PT750PL
20.2. Main Circuit & Panel
1 2 3
SCHEMATIC DIAGRAM - 6
A
:-B SIGNAL LINE
B
MAIN CIRCUIT
:+B SIGNAL LINE
C2960 W2592
CN2002
1 0
TUNERGND 10
B
T+9V 9
C2261 R2260
RDS DETECT 8
0.039 1K
TUNER RCH 7
TO TUNER PACK
TUNER DO/ST 6
R2160
C2161
(J3CCBB000007) TUNER LCH 5
0.039
1K
TUNER SD 4
W2606 0
TUNER DI 3
TUNER CLK 2
PORT_SEL 1
C
CHASSIS
D
E
F
G
H
4 5 6
:MAIN SIGNAL LINE :FM SIGNAL LINE :DVD VIDEO SIGNAL LINE
TU+9V
TUN-RCH
TUN_DO
TUN-LCH
TUN_SD
TUN_DI
TUN_CLK
AGND
W2607
0
+7V
W2608 W2612
0 0
AGND
-7V
16 15 14 13 12 11
TO MAIN
SECTION (3/4) 17 18 19 20 21 22
C2838 C2837
0.1 0.1
7 8 9
R2309
0
R2409
0
W2615 W2912
0 0
+7V
R2175
FL
C2177 1.8K
50V1
Q2201
B1GDCFGA0018
MUTING CONTROL
C2277
R2275
50V1
FR 1.8K
-7V
10 9 8 7 6 5 4 3 2 1
IC2801
23 24 25 26 27 28 29 30 31 32
C2840 C2833
W2596
0.1 0.1
0
VMUTE
IC2801
C9ZB00000461
W2593 R2804
VIDEO BUFFER 1K
0
Q2801
B1GBCFJN0033
MUTING
100
10 11 12
D2752
C2316
B0ACCK000005
R2307
0 0 6dB Clip
R2762
10K
R2763
10K
3dB Clip
C2416
R2407
0
0
D2753
IC2751
B0ACCK000005
C0ABBB000350
OP AMP
W2562
W2539 0
R2176
W2569 0 W2595 0
R2173 27K
18K
C2180
C2178
C2179
0.1
150P
100P
3 4
5 6 7 8
2 5
R2271
IC2102
1 6
56K
Q2101
B1GFGCAA0001
4 3 2 1
MUTING
W2541 C2278 C2279
R2274 100P 150P
8.2K
0 W2565 0 R2273 27K
R2276
18K
13 14
B16
R2752
10K
C2754
R2758
100P
22K
R2760
820K
8 7 6 5
+VCC
IC2751
-VCC
1 2 3 4
R2759
22K
R2761
820K
R2755 R2756 W2551
4.7K 100 0
C2755
100P
0
R2177 R2179 R2182
47 47 0
R2178 R2180
47 47
IC2102
C0AABB000125
OP AMP
(HEADPHONES AMP)
R2278 R2280
47 47
R2282
R2277 R2279 0
47 47
W2582 0
TO MAIN
SECTION (2/4)
1/4 2/4
3/4 4/4
SA-PT750PL MAIN CIRCUIT