Panasonic SC-HT870 Service Manual page 243

SCHEMATIC DIAGRAM-3
MAIN CIRCUIT
Q2030
B1GBCFJN0021
Switch
H2000
TRAY CW 7
C+9V 6
D2042
GND1 5
B0EAKM000117
VREF+ 4
TRAY CCW 3
TRAY CLOSE 2
TRAY OPEN 1
CN2004
STATUS 1
CMD 2
DSPCLK 3
MGND 4
M+9V 5
MGND 6
M+9V 7
DGND 8
D+1.2V 9
DGND 10
D+1.2V 11
AGND 12
A+5V 13
AGND 14
A+5V 15
DGND 16
D+5V 17
DGND 18
D+5V 19
DGND 20
AUDIO
21
DIGITAL
DGND 22
ZFLAG 23
C2600
VREF 24
10V1
TO
SUBW 25
DVD MODULE
C2500
ADACGND 26
CIRCUIT 16V10
CENTER 27
(FP8101) ON
C2400
SCHEMATIC ADCGND 28
50V10
DIAGRAM-1
SR 29
C2300
ADACGND 30
16V10
SL 31
C2256
ADACGND 32
10V1
FR 33
C2156
ADACGND 34
10V1
FL 35
C2257
ADACGND 36
50V10
MIXR 37
C2157
ADAC5V 38
50V10
MIXL 39
ADAC5V 40
C 41
VGND 42
Y 43
YGND 44
CR/PR/R 45
VGND 46
CR/PB/B 47
VGND 48
PY/Y/G 49
VGND 50
: +B SIGNAL LINE
R2804 R2803
2.7K 2.2K
VREF+
TRV FWD
LD FWD
C+9V
D2041
B0EAKM000117
LD REV
LOAD
OPEN SW
DVD STAT
DVD CMD
DVD CLK
M+9V
D+1.2V
DVD A+5V
R2895
10k
DVD D+5V
DVD MUTE
Q2028
B1GBCFJN0021
Muting Switch
R2600
2.7K
SUBW
R2500
10K
DVDCNT
R2400
10K
DVDSR
C2206
50V4.7
R2300
LINE R
10K
DVDSL
R2256
10K
DVDFR
R2156
10K
DVDFL
R2257
1K
DVD MIXR
R2157
1K
DVD MIXL
DVD A+5V
S C
S Y
CR R LINE L
R C2106
50V4.7
CB B
B
PY
G
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
RCH 7
TO
DO/ST 6
TUNER
LCH 5
PACK
SD 4
DI 3
CLK 2
GND 1
R2206 1K
R2207
100K
R2107 R2106 1K
100K
R2208 2.7K
R2108 2.7K
Q2100
B1GFGCAA0001
Muting Switch
: FM/AM SIGNAL LINE
S901
PLAY
S902
OPEN
T+9V
DET OUT
C2200 50V1 R2200 1K
TUN R
TUN DO
C2100 50V1 R2100 1K
TUN L
TUN SD
TUN DI
TUN CK
R2979 0 C2207 50V3.3
LOUT2
LOUT1
R2976 0 C2107 50V3.3
C2099 50V4.7
N
R2873 27K R2874 56K
Q2026
B1GDCFGA0014
Muting Control
R2872
1K
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