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I measured various PSU voltages, just to be sure: 19.77v line = 18.77v 12.10v(A) line = 12.40v 12.10v(B) line = 12.36v 12.09v(A) line = 12.39v 160v line = 155v 11.60v line = 9.80v (measured from C559 instead of L351 because I didn't bother playing this game of Where's Waldo long enough)
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#107
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If you plan on doing this kind of thing any more than this one set, a scope is a pretty core tool in electronics troubleshooting |
#108
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About the H disable circuit - I'm seriously stumped as to why it's being activated. Hopefully our lord and savior Sams' shall yield thy answers...
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Last edited by luRaichu; 04-30-2024 at 09:28 PM. Reason: dubstep rave trap remix in a nightcore nightclub |
#109
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I'm not suggesting that it's the most likely problem, but it's a possible problem that should be fairly easy to check out with a multimeter. Quote:
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#111
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I read about H osc. disabling circuits in other Panasonic TVs. It pumps up H frequency to eliminate X-Ray risk if HV is found to be above spec. Which might explain why the picture is so bright & shrinks sometimes. But most other sets from other brands simply shut down if HV is too high.
I can't test the HV without a high voltage meter though.
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