Panasonic TV TC-29V30H

[Guest]

I have a more than 10 year old panasonic TC-29V30H. Today I try to clean up the duct inside the TV but after than the TV tuner seem not able to auto tune channel. It can't discover any channel by auto tune. By manual tune, it got a very snowy picture which is not acceptable. So what is the like problem?

I want to adject the RF AGC in service menu but seems I can't get into the service menu.

I try to access the service menu by

Adjust the volume to 0
SET OFF timer button
simultaneously press RECALL on remote and VOLUME DOWN on the TV set

but nothing happen.

[Richard]

Probably the 33v tuning supply zener diode. Don't know which one as I haven't got a circuit.

Richard

[Guest]

Some capacitor on the tuner broad is leaking, replace those capacitor and resolder around the area component solve the problem.