Panasonic SC-HT870 Service Manual page 165

SCHEMATIC DIAGRAM-3
: +B SIGNAL LINE
MAIN CIRCUIT
R2804 R2803
2.7K 2.2K
VREF+
TRV FWD
Q2030
B1GBCFJN0021
Switch
H2000
LD FWD
TRAY CW 7
C+9V
C+9V 6
D2042 D2041
GND1 5
B0EAKM000117 B0EAKM000117
VREF+ 4
LD REV
TRAY CCW 3
LOAD
TRAY CLOSE 2
OPEN SW
TRAY OPEN 1
CN2004
DVD STAT
STATUS 1
DVD CMD
CMD 2
DVD CLK
DSPCLK 3
MGND 4
M+9V 5
MGND 6
M+9V
M+9V 7
DGND 8
D+1.2V 9
DGND 10
D+1.2V
D+1.2V 11
AGND 12
A+5V 13
AGND 14
DVD A+5V
A+5V 15
R2895
DGND 16
10k
DVD D+5V
D+5V 17
DGND 18
DVD MUTE
D+5V 19
DGND 20
Q2028
AUDIO
21
B1GBCFJN0021
DIGITAL
Muting Switch
DGND 22
ZFLAG 23
C2600 R2600
VREF 24
10V1 2.7K
TO SUBW
SUBW 25
DVD MODULE
C2500 R2500
ADACGND 26
CIRCUIT 16V10 10K
DVDCNT
CENTER 27
(FP8101) ON
C2400 R2400
SCHEMATIC ADCGND 28
50V10 10K
DVDSR
DIAGRAM-1
SR 29
C2300 R2300
ADACGND 30 LINE R
16V10 10K
DVDSL
SL 31
C2256 R2256
ADACGND 32
10V1 10K
DVDFR
FR 33
C2156 R2156
ADACGND 34
10V1 10K
DVDFL
FL 35
C2257 R2257
ADACGND 36
50V10 1K
DVD MIXR
MIXR 37
C2157 R2157
ADAC5V 38
50V10 1K
DVD MIXL
MIXL 39
DVD A+5V
ADAC5V 40
S C
C 41
VGND 42
S Y
Y 43
YGND 44
CR R LINE L
CR/PR/R 45
R
VGND 46
CB B
CR/PB/B 47
B
VGND 48
PY
PY/Y/G 49
G
VGND 50 C2178 R2180
680P 15K
C2278 R2280
680P 15K
: MAIN SIGNAL LINE : DVD(VIDEO) SIGNAL LINE
TRAY LOADING CIRCUIT
IC904
TA7291S
REFLECTIVE PHOTO SENSOR
9 8 7 6 5 4 3 2 1
C984
25V10
RM902
M
CN2002
GND 10
M+9V 9
DETECT 8
C2200 50V1 R2200 1K
RCH 7
TO
DO/ST 6
TUNER C2100 50V1 R2100 1K
PACK LCH 5
SD 4
DI 3
CLK 2
GND 1
C2206
50V4.7 R2206 1K R2979 0 C2207 50V3.3
R2207
100K
R2107 R2106 1K R2976 0 C2107 50V3.3
100K
R2208 2.7K
R2108 2.7K C2099 50V4.7
N
R2873 27K R2874 56K
Q2100
B1GFGCAA0001
Muting Switch
Q2026
B1GDCFGA0014
Muting Control
C2106
50V4.7 R2872
1K
: FM/AM SIGNAL LINE
CN901
7
6
5
4
3
2
1
S901
PLAY
S902
OPEN
T+9V
DET OUT
TUN R
TUN DO
TUN L
TUN SD
TUN DI
TUN CK
C2010
R2086 C2014 C2011
50V10
1K 330P 50V10
1 2 3 4 5
IC2020
C1BB00000715
RDS Demodulator LSI
16 15 14 13 12
LOUT2
R2087 R2088 R2089
LOUT1
100K 100K 100K
L2002 IC2019
100u
C3EBDG000052
EEPROM IC
C2013 (Not supplied)
C2012
47P
560P
8
6 7 8
7
6
R2090
4.7K
5
11 10 9
C2019
50V330
C2015
47P
L2001
100u
C2018
C2016 C2017
6.3V
0.01 1000P
47
SA-HT870E,EB,EG MAIN CIRCUIT
1
VREF+
2
EECS
3
EECLK
4