AOC Vibrant VL7A9DA Service Manual page 37

II.) SOUND DISTORTION
Check U1 pin 2, 4 10, 12 is the
voltage output = VCC / 2 . ?
AUDIO BOM
Bill Of Materials
Item Quantity
______________________________________________
1 3
2 1
3 1
4 2
5 1
6 1
7 1
8 2
9 1
10 1
11 1
12 3
13 1
14 1
15 2
16 1
17 2
18 2
19 1
20 1
21 1
CHECK SPEAKER
September 7,2001
Reference Part
C1,C2,C4 1uF
C3 2200uF/25V
C5 10uF/50V
C6,C7 0.047uF
C8 100uF/16V
C9 100uF/25V
D1 LED
J1,J3 CON2
J2 EAR PHONE
J4 AUDIO IN
J5 DC IN
VR1,R1,R2 10K
R3 33K
R4 68K
R5,R6 15K
R7 130K
R9,R8 3K
R11,R10 1(3W)
R12 680
S1 SW SPST
U1 AN7522
YES
18:09:14
NG
Check U1
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