Troubleshooting - Sanyo PDP-42H1EV Service Manual

Troubleshooting

No Sound
Refer to Schematic Diagram or Chassis Block Diagram, find out the part of trouble.
In advance check the setting mode according to Instruction Manual.
All mode?
No
D-SUB, AV4
AV1, AV2, AV3
Check the line from
IC1001 in Main Unit
to AV1, AV2 or AV3.
Yes
Is there
sound signal from
monitor out
Yes
No Sound from Headphone
No Sound from Speaker
No Sound from Woofer
No Sound from Headphone,
Woofer & Speaker
Check around IC1002 in Main Unit. Also check
the line from IC1001 to D-SUB or AV4 via IC1002.
No
Check the line from IC1001
(Pin 52 or 54) in Main Unit to
IC121 via IC002, IC003, IC001
in SUB CPU Unit.
-26-
Check around IC1001
in Main Unit.
Check around IC031
in SUB CPU Unit.
Check around IC071
in SUB CPU Unit.
Check around IC004
in SUB CPU Unit.