Panasonic SA-HT680PL Service Manual page 77

SCHEMATIC DIAGRAM-5
MAIN CIRCUIT
:+B SIGNAL LINE :-B SIGNAL LINE
R2263 R2163
1K 1K
C2263 C2163
50V3.3 50V3.3
R2894
220K
C2815
16V100
R2162
8.2K
C2161 0.1 C2162 0.033
R2261 8.2K
C2149 1
C2262 0.033
C2261 0.1
C2249 1
R2892 0 R2893 330K
C2606 0.18
C2607
R2610
C2618 R2609
0.22
3.3K
0.047
47K
R2608 100K
C2608
0.12
R2625 22K
C2610 50V10
R2611 47K
R2501 75K
C2502 50V10
R2303 39K
C2302 1
C2403 1
R2403 39K
C2264 50V4.7 R2164 18K
R2605 R2612 C2603 R2264 18K
2.2K 6.8K 50V4.7
R2304 R2606 C2175
7.5K 10K 47P
C2515
50V4.7
R2516 4.7K R2515 6.8K
R2517 C2516
100K 47P
Q2502
B1GBCF000131
Muting Switch
12 13 14
:MAIN SIGNAL LINE
C2506
C2503 R2512 C2505
0.01
0.033 4.7K 50V1
C2504
0.22
R2506
5 6 7
47K
R2407
100
C2404
50V3.3
C2613
0.01
4 3 2
R2615 100K
R2614 C2615
1K 5600P
C2612 50V4.7 R2616 56K
R2617 56K
R2406
100K
R2144 3.9K
R2311
2.2K
R2244 3.9K
C2510 6800P
R2613 3.3K
R2503 3.3K
R2305 1K
R2405 1K
R2920 10K
R2919 10K
C2270
47P
C2276 1000P
C2250 R2246
50V1 R2245 5.6K 47K
C2251 C2252
100P 100P
5 6
4 3
C2151
100P
C2254
C2176 1000P
0.01
C2150
50V1 R2145 5.6K
15 16
R2505
1K
R2508
1.8K
8
Q2500
B1GDCFGA0018
IC2015
Muting Control
C0ABBB000118
Buffer Amp
R2509
56K
R2618 R2307
1
1K 100
C2616 C2303
50V10 50V3.3
R2510 C2508
27K 50V4.7
R2624 100K
R2312
2.2K
R2255
100K
Q2104
B1GFGCAA0001
R2306
Muting Switch 100K
C2253 R2247 R2249
16V100 22 22
C2154
R2251
0.01 R2248 R2250
4.7K
22 22
7 8
C2255
1000P
IC2013
C0AABB000125
Headphone Amp
R2148 R2150
2 1 22 22
C2152 C2153 R2147 R2149
100P 16V100 22 22
C2155 R2151
R2146 1000P 4.7K
47K
17 18 19
77
R2619
R2620 R2308
2.2K
1.8K 1.8K
Q2600 Q2103
B1GDCFGA0018 B1GDCFGA0018
Muting Control Muting Control
Q2601
B1GFGCAA0001
Muting Switch
R2621 R2309
56K 56K
R2511
2.2K R2623
100K
R2622 C2617 R2310
27K 50V22 27K
R2254
R2168
2.2K
R2167
22K
12K
C2168
Q2200
50V3.3
B1GFGCAA0001
Q2105
Muting Switch
B1GDCFGA0018
Muting Control
R2154
2.2K
R2155
100K
R2166
1.2K
R2253 10
R2152 R2268
R2267
2.7K
27K
56K
C2267
50V4.7
Q2201
Q2102
B1GDCFGA0018
B1GFGCAA0001
Muting Control
Muting Switch
R2266
R2252 1.8K
2.7K
R2153
10
HP L
SA-HT680PL MAIN CIRCUIT
20 21 22
SA-HT680PL
C2170
50V4.7
MUT FRNT
HP R