Panasonic t.v., TC 20RA10LP.I replaced the audio ic ,an7523n,and the t.v now has sound but the sound/volume remains at one pitch. whenever I press the volume button whether up/down the volume remains same but whenever it reaches 0 on the volume display on the screen you won't hear the volume. what is wrong here ? N:B There is no bridges across the ic pins.
Always keep in mind what Sherlock Holmes said.
Quite so.
"Madam, I need you to remain calm. Trust me, I'm a professional and beneath this pillow lies the key to my release."
--Winston
Look for a voltage variation on pin 9(DC VOL) as you turn volume up and down. The new IC seems to be working else it wouldn't mute at volume zero. Google groupers have brains too. Jango
Some Panasonics in the past were very critical of factory-original IC's. I once had a Pan portable as a test set in the workshop. It had a failed field chip when it first became mine. I recall replacing it with one of the same basic number out of the stock drawer, but the set never did work right, with all sorts of beam limiter problems as the brightness of scenes varied. Eventually, on the advice of a colleague who'd come across this before, I ordered in a genuine replacement from Pan. After fitting this, it worked just fine.
Arfa
Is that a new feature for Google Groups? ;-)
-- You can't have a sense of humor, if you have no sense.
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Chinese fakes and near equivalents printed on to meet unavailable requirements, it's already tough for us with component sizes being shrunk down to mils, dealing with this crap from the unscrupulous Chinese puts a dent in your wallet.
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