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DVD-S30
QQ
3 7 63 1515 0
C
Is audio output normal ?
Yes
Is key function OK ?
TE
L 13942296513
Yes
Is remote control OK ?
Yes
End
www
.
20
http://www.xiaoyu163.com
No
Does AK4385
receive correct data ?
Is output of
AK4385 correct ?
Check circuit of filter,amplifier,
mute and etc.
Is communication
No
between uPD16312 &
MT1389 OK ?
Check KEY matrix.
No
Is signal IR
(pin 7 of W6) normal ?
Check remote control.
Check connection between
remote sensor and MT1389.
x
ao
u163
y
i
http://www.xiaoyu163.com
2 9
8
No
Check connection between
MT1389 and AK4385.
No
Check AK4385 and its
peripheral circuit.
No
Check connection between
MT1389 and uPD16312.
Q Q
3
6 7
1 3
1 5
No
Check remote sensor, GP1UM271.
co
.
9 4
2 8
0 5
8
2 9
9 4
2 8
m
9 9
9 9
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