No Sound From The Speakers - Pioneer PDP-R06XE Service Manual

1
A

No sound from the speakers (1/2)

No sound from the speakers
Yes
Is the sound muted?
No
Is the volume set to "0"?
B
No
Are the headphones
connected?
No
Is only the sound of TV not
output?
Yes
Is a signal input to IC4401?
(pin 2)
C
49
Yes
Are the signals output from
IC4401?
(pin 30), (pin 31) 50 51
Yes
Are the signals input to
IC4804?
(pin 19), (pin 20)
52 53
D
Yes
Are the signals output from
IC4804?
(pin 13), (pin 14)
54 55
Yes
Does the symptom
disappear after the system
cable is replaced?
E
Yes
Finished
F
64
1
2
Cancel muting and check
Yes
the sound with the
headphones again.
Raise the volume and
Yes
check the sound again.
Disconnect the headphones
Yes
and check the sound from
the speakers again.
No
Check around FE (U4401)
No
and communication between
FE and the microcomputer.
Check the communications
No
between the FE and IC4401
and around IC4401.
No
Check between IC4401 and
IC4804.
Check around IC4804
No
and communication between
IC4804 and the microcomputer.
No
Failure in the panel
PDP-R06XE
2
3
Is only the sound from
No
the front input connector
not output?
Yes
Is the flexible cable correctly
No
connected between CN4001
and CN7804?
Yes
Is only the sound from the
HDMI connector not output?
Are the signals output from
No
IC6405?
(pin 7), (pin 8)
Check around IC6405
and communication between
IC6405 and the microcomputer.
Is only the sound from the
SCART input connector not
output?
Check between SCART
connector and IC4804.
3
4
Plug the flexible cable in
correctly and check the
sound again.
No
Yes
56 57
Yes
No
Yes
A
4