Pioneer PDP-R04E Service Manual page 134

1
No sound from the speakers (2/2)
A
A
Is it sound for every function
that doesn't come out?
No
Is a signal output from
IC8002?
Yes
B
Has the signal arrived at
TP8668 and TP8667?
45 46
Yes
Has the signal arrived at
TP9301 and TP9303?
47 48
Yes
Has the symptom been
settled when the system
C
cable is replaced?
Yes
Finishing troubleshooting
D
E
F
134
1
2
Check around IC8002 and
No
check the communications
between IC8002 and the
B
microcomputer.
Check around IC8003 and
No
check the buffer circuits.
B
Check the flexible cables
between the AV BOARD Assy
No
and MR MAIN BOARD Assy
B
and between the MR MAIN
BOARD Assy and MDR Assy.
No
The panel is defective.
2
3
No sound from the
sub-woofer
No
Is sound muting set?
No
Is the volume set to 0?
No
Are the headphones
connected?
No
Is a signal output from
IC8003?
(3), (13)
34
Yes
Is a signal output from
IC8008?
(7), (10)
36
Yes
Is a signal output from
IC8007?
(1), (7)
38
Yes
Has the signal arrived at
TP7710?
Yes
Check around the jack.
PDP-R04E
3
4
Yes
Cancel muting then check
again.
Yes
Raise the volume then
check again.
Yes
Disconnect the headphones
then check again.
No
Check around IC8003 and
check each input signal.
B
35
No
Check around IC8008.
B
37
No
Check around IC8007.
B
39
No
Check around Q7761.
B
49
4