Philips PET745/12, Service Manual

Page: 16 / 37

5
5
4
4
3
3
2
2
1
1
D D
C C
B B
A A
A&D Technology
MAIN BOARD CIRCUIT DIAGRAM-AUDIO
A_MUTE
AOUT_FR
A_MUTE
AOUT_FL
A
_
L
_
S
P
E
A
K
E
R
A
_
R
_
S
P
E
A
K
E
R
SPR
L
SPL
R
AC
AC
AV_OUT_R
AV_OUT_L
AV_OUT_L
AV_OUT_R
A_R_SPEAKER
A_L_SPEAKER
A_MUTE
MUTE
AOUT_FR 2
AOUT_FL 2
ML_OUT
MR_OUT
MUTE
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND GND
+9V
VER
+9V
VER
DVCC3
J2
SPK
1
2
3
4
C
2
9
0
.1
u
F
Q8 SSP0403
1
3 2
+
EC12
100uF/10V
1
2
C
3
2
0
.1
u
F
R33
100K
+
EC13
10uF/10V
1 2
R34
470
Q3
2N3904
L5 FB2K2
R
6
1
4
.7
R
C23
0.1uF
C
3
0
0
.1
u
F
R
6
0
4
.7
R
120pF C15
EC4
10uF/16V
R55
10K
R53
100K
+
EC17
100uF/10V
1
2
+
EC14 100uF/16V
1 2
+
EC16 100uF/16V
1 2
+ EC11
100uF/25V
1
2
200pF
C16
C27
820P/NC
R56 30K
120pF C19
R35 10K/0402
L6 FB2K2
R42
5.6K
C25
0.1uF
R37 1K/0402
R38 180
C33
0.1uF
C26
0.1uF
R27 180
EC5
10uF/16V
C28
0.1uF
R
5
1
2
R
(0
8
0
5
)
EC7
10uF/16V
EC6
10uF/16V
R28
8.2K
R46 100K
200pF
C20
R26 27K
L4
FB2K2
47pF
C18
R36 27K
J1 VOLUME 10K
1 2 3 4 5
1 2 3 4 5
R29 4.7K
R44
470
R39
8.2K
Q6
2N3904
R40 4.7K
47pF
C22
1200pF
C17
1200pF
C21
R30 1K
+
-
U3B
NJM4558
5
6
7
8
4
+
-
U3A
NJM4558
3
2
1
8
4
R41 1K
R
5
2
2
R
(0
8
0
5
)
R32
100K
R31
5.6K
+ EC9
10uF/10V
1
2
R58 200
R45 51K
R43
100K
+
EC10
47uF/25V
1
2
C24
0.1uF
D2
IN4148
1
2
VER1
earphone
1 2 3
4 5
6 7
8
9
10
11
R48
56K
L3 FB600R
R59
10K
+
EC15 10uF/10V
1 2
R54 200R
U4
APA2822
1
2
3
4
5
6
7
8
C31
820P/NC
R57 30K
+
EC8
22uF/25V
1
2
Q5
2N3904
1
3
2
Q4
2N3906
3 2
1