Philips MCD170 Service Manual page 23

CIRCUIT DIAGRAM - DVD BOARD
MPEG is not repaired,diagram for referrence only.
C28
R60
AOUT_FR R59 180 R61
C30 9.1K C31
10uF/16V
200pF 1200pF
AGND AGND
C35
R70
AOUT_FL R69 180 R71
C37 9.1K C38
10uF/16V
200pF 1200pF
AGND AGND
8 - 4
R57 24K
C27 120pF
AGND
C29
10uF/16V
4.7K
2
R63 100 DVD_R
1
3
U8A
C32
NJM4558 R64
VREF3
100K
47pF
AVCC12
AGND
AGND
R66 24K
C33 120pF
C36
AGND 10uF/16V
4.7K
6
R72 100 DVD_L
7
5
U8B
C39
NJM4558 R75
VREF3
100K
47pF
AVCC12
AGND
AGND
R82 24K
C41 120pF
AGND
R76
C45
R80 4.7K
2
R95 2.2K
1
18K C40
3
U9A
10uF/16V
1200pF NJM4558 R64
VREF3
NC
AVCC12
AGND
AGND
R83 24K
C43 120pF
AGND
R86
C46
R85 4.7K
6
R95 2.2K
7
18K C42
5
U9B
10uF/16V
1200pF NJM4558 R75
VREF3
NC
AVCC12
AGND
AGND
P+5V
Q14
1N4148
2N3904 R89
470
AGND
A_MUTE
EC19
AGND
220uF/16V
P+5V
P+5V
Q13
2N3904
R88
3 AUDIO_MUTE
470
AGND
R74 10K
P+5V
A_MUTE
2
A_MUTE
DVD_LOUT R
C32
Q15
NC
2N3904 R89
470
AGND
AGND
A_MUTE
DVD_LOUT L
NC
Q16
47pF
2N3904
R88
470
AGND
AGND
A_MUTE
8 - 4
P+5V
Q9
Power On Mute
1 3
R62
7.5K 2N3906
D4
R65 10K
Power Off Mute
Q10
1 3
2N3906
R67 10K
Q11
R68 100
1 3
C34 2N3906
1uF
R73 470
A_MUTE
AVCC12 VREF3
BC44
BC36 BC37
0.1uF 0.1uF 0.1uF
AGND
AGND
P+12V
R79 10
DVD_R
DVD_R 2
DVD_L
DVD_L 2
AOUT_FR
AOUT_FR 3
AOUT_FL
AOUT_FL 3
AVCC12
AVCC12
R77
33K
VREF3
EC20
EC21
100uF/16V
R84
33K
100uF/16V
AGND
AGND AGND