Pioneer PDP-R05U Service Manual page 182

1
QQ
3 7 63 1515 0
No sound from the speakers (1/2)
A
No sound from the speakers
No
Is sound muting set?
No
Is the volume set to 0?
No
B
Is it the only TV sound that
doesn't come out?
Yes
Is a signal output normally
from the FE (U7501)?
B
(14)
40
C
Yes
TE
L 13942296513
Is a signal output from
IC7503?
B
(22), (23)
41 42
Yes
D
Is a signal input to IC8002?
(62), (64)
B
43 44
Yes
Check around IC8002 and
check the communications
between IC8002 and the
microcomputer.
E
www
F
182
1
http://www.xiaoyu163.com
2
Yes
Cancel muting then check
again.
Yes
Raise the volume then
check again.
No
Check the communications
No
around the FE and between
the FE and the
microcomputer.
No
Check around IC7503.
Check the communications
No
between IC7503 and
IC8002.
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y
. i
PDP-R05U
2
http://www.xiaoyu163.com
3
8
Is it only the VIDEO 3
sound that doesn't come
out?
Yes
Is a signal input to IC8003?
(4), (11)
Yes
Check around IC8003 and
check the communications
between IC8003 and the
Q Q
microcomputer.
3 6 7 1 3
Is it sound other than the
TV or VIDEO 3 that doesn't
come out?
Yes
Is a signal input to IC8002?
Yes
u163
.
3
4
2 9 9 4 2 8
No
Check the communications
No
between the jack and
B
IC8003.
1 5 0 5 8 2 9 9 4
No
A
Check the communications
No
between the jack and
B
IC8002.
m
co
4
9 9
2 8 9 9