Panasonic SC-HT870 Service Manual page 247

SCHEMATIC DIAGRAM-5
MAIN CIRCUIT
R2620
1.8K
Q2600
B1GDCFGA0014
Muting Control
R2621
56K
R2622 C2617
27K 50V4.7
Q2005
B1GBCFJN0021
Muting Control
R2809
1K
Q2003
B1GBCFJN0021
Muting Control
R2810
1K
C2036
50V22
17 16 15 14 13 12 11 10 9
IC2006
C9ZB00000431
Video Selector IC
18 19 20 21 22 23 24 25 26
C2047 C2046
6.3V330 6.3V330
R2886 R2887 R2888
75 75 75
C2808 C2807 C2806
100P 100P 100P
: +B SIGNAL LINE
C2177
16V47
R2308 R2179 R2166
1.8K 1K 1.2K
Q2103 Q2105
B1GDCFGA0014 B1GDCFGA0014
Muting Control Muting Control
R2309 R2168
56K 22K
R2310 C2170 R2167 C2168
27K 50V4.7 12K 50V3.3
R2808
1.8K
C2026 R2805
0.01 68
Q2007
2SB0709AHL
Amplifier
R2811
1.8K
C2027 R2806
0.01 68
Q2006
2SB0709AHL
Amplifier
R2812
2.2K
L2010 R2807
22u 10K
8 7 6 5 4 3 2 1
27 28 29 30 31 32 33 34
C2038
10V220
R2889 R2890
75 75
R2891
C2136
75
220P
C2805 C2804 C2803 R2127
100P 100P 100P 100K
R2128
1K
: -B SIGNAL LINE : DVD(VIDEO) SIGNAL LINE
R2266
1.8K
Q2201
B1GDCFGA0014
Muting Control
R2267
56K
R2268 C2267
27K 50V4.7
C2030 C2031
1 1
6 5 4
IN1 GND IN2
IC2009
C1AB00001486
Video Buffer
SW OUT VCC
1 2 3
C2033
0.01
OUT
WIDE1
Q2004
D2000
B0ACCE000003
B1GBCFJN0021
Switch
R2083 D2002
680 B0ACCE000003
D2001
B0ACCE000003 C2006 50V2.2
VREF+
C2003 C2004 C2005
10V22 0.01 10V1000P
C2236 R2130 R2230 R2131 R2231
220P 10K 10K 10K 10K
R2227
R2129 R2229 R2132 R2232
100K
10K 10K 10K 10K
C2138 C2238 C2139 C2239
220P 220P 100P 100P
R2228
1K
: MAIN SIGNAL LINE
R2897
1K
STBY LED
Q2029
B1GBCFJN0021
LED Drive
IN
X2000
H2B100500004
10MHz
GND
L2000
3.3u
C2008
0.1
R2082
47K
C2009
C2007
6.3V
0.1
100
D2003 Q2000
B0ACCK000005
B1GBCFLL0028
Reset Switch
R2878 1
R2879 1
R2880 1
R2881 1
R2882 1
R2133 R2233
R2883 1
10K 10K
R2884 1
R2885 1
C2801 100P
R2134 R2234 C2802 100P
10K 10K
C2137 0.1
C2237 0.1
C2141 C2241
C2140 680P
100P 100P
C2240 680P
AV JACK
JK2001
K2YZ12000010
R2080
10K
FLD RST
FLD CS
FLD CK
FLD DA
KEY2
R2065 10K
R2066 10K
R2067 10K
R2068 10K
R2072 10
KEY1
DISC SENS
R2074 R2075
39K 2.7K
R2076 1
R2077 4
R2084 2
R2323
100K
C2824
R2912
50V4.7
2.2K
R2905
56K
Q2300
B1ABEB000001
Muting Switch
Q2301
B1GDCF
Muting
R2909
1.8K
55