No Audio Output - Philips HTS3531/12 Service Manual

No audio output

No audio output
Check voltage +34.5
V whether normal or not
Amplifier Board
Yes
Check the 24pin FFC connection XP11 on
Main Board and XP701 on Amplifier Board
whether right or not between Main Board
and Amplifier Board
Check the control signal whether right or
not at the U1 PIN59,PIN60,PIN63,on
Main Board and the signal at the XP11
PIN9 PIN10 PIN22
Yes
Replace Amplifier Board
Go
at XP702 on
Yes
5-4
Check XP11 pin 14&16 3.3V on Main
No Board whether normal or not
Refer to CN502 on
Power Board
No
Replace U1 on Main Board,or
replace Main Board
Trouble shooting Chart
Yes
No