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Panasonic Z5 chassis tuner/if failure when warm (TC21S1R)

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This is a UK spec Panasonic TC21S1R (Z5 chassis). It works for several hour before the picture shows some disturbance, then breaks up into snow. After this, no channels can be located using the search tuning, implying that the frequency has not just drifted off but there are no signals at all. AV input remains working.

The reason I'm having particular trouble with this fault is that it will never show up when the set back has been removed, even if heated with warm air. At the moment I don't even know if the problem is with the tuner or the IF strip.

Any help most appreciated. Please copy me on snipped-for-privacy@bigfoot.com

Regards,

Colin

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Colin McCormick
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Art

I did do some soldering inspection and found the odd dry joing around the LOPT, but everything around the tuner / IF looks good. Flexing seems to have no bearing on it, only temperature (and even then I can't instigate it with hot air).

I suspect a capacitor!

Colin

Art wrote:

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Colin McCormick

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