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5
QQ
3 7 63 1515 0
No sound from the speakers (2/2)
A
Is it sound for every function
that doesn't come out?
No
Has the signal arrived at
CN8657?
(23), (27)
No
Has the signal arrived at
CN8657?
(31), (35)
No
Is a signal output from
IC8002?
Yes
Has the signal arrived at
TP9625 and TP9626?
45
Yes
TE
L 13942296513
Has the signal arrived at
TP9301 and TP9303?
47
Yes
Has the symptom been
settled when the system
cable is replaced?
Yes
Finishing troubleshooting
www
.
5
http://www.xiaoyu163.com
Check the flexible cables
between the AV BOARD Assy
Yes
and MR MAIN BOARD Assy
and between the MR MAIN
BOARD Assy and MDR Assy.
Yes
Change
TUNER BOARD ASSY.
Check around IC8002 and
No
check the communications
B
between IC8002 and the
microcomputer.
Check around IC8003,
No
check the buffer circuits and
check the TUNER BOARD
B
46
ASSY.
Check the flexible cables
between the AV BOARD Assy
No
and MR MAIN BOARD Assy
B
48
and between the MR MAIN
BOARD Assy and MDR Assy.
No
The panel is defective.
x
ao
u163
y
i
http://www.xiaoyu163.com
6
8
Q Q
3
6 7
1 3
.
PDP-R05U
6
7
2 9
9 4
2 8
1 5
0 5
8
2 9
9 4
m
co
7
8
9 9
A
B
C
2 8
9 9
D
E
F
183
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