Question about Panasonic CT-27SC14 27" TV
The high voltage should be around 29.5 KV and not fuctuate between 20-30 KV that would indicate a high voltage regulation issue then. Are the filaments lighted up in the neck of the CRT? If so then yes you are probably looking at a low voltage issue such as a 12 volt source or a a/v switching IC issue.
Posted on Apr 23, 2007
If you have high voltage at 30kv then you should have filaments. The filament voltage comes freom the high voltage transformer and not low voltage. I would check on the CRT board for the two pins marked "F" for filament or "H" for heater and see if there is any kind of A.C. volatge there at all. If there is, disconnect the board and check for continuity between those two pins. Low resistance is normal, open is a bad CRT.
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HI
No, I didn't mean the voltage was fluctuating, I meant the voltage had a reading of somewhere between 20 and 30KV probably around the voltage you state. No as far as I can tell no filaments are lit in the CRT, in fact I have checked for heater voltage and have non as far as I can tell, this is why I'm suspecting a problem on the Low voltage supply board, as to what I'm not sure, thats the issue, I have no schematic for this model, any other ideas?
HI
Well after doing the checks, I found the CRT at fault, Ohmed out the pins, they were open, now I just have to find a good CRT, thanks for your help:)
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