Google is being very evasive on this one!
28WN20.Pretty sure the degauss thermistor has shattered and I'd rather not have to hand trace to figure out whether its a PTC/PTC or PTC/NTC type.
Thanks for any help.
Maybe here?
Peter Wieck Melrose Park, PA
Many thanks - also found info on the Hitachi that phutted yesterday.
usually degaussing doesn't need to be fixed unless you move the tv. The dual element thermistor can most likely be replaced by a standard one from almost any other colour tv.
NT
Incorrect: there are 2 types - the usual one is dual PTC, the "spare" PTC is directly across the mains to heat the active one and cut it off. the very early single PTC had a load resistor and fed to the coils via a 68V VDR. Some are PTC/NTC - the NTC is heated by the current draw of the TV/monitor which also provides inrush surge limiting.
My TV has a single PTC and a time delay relay - fairly common on PC monitors. Some had a front panel degauss button so you could do it manually as well as at power up.
The most common failure mode is the thermistor pellet sometimes shatters - my TV also has some electronics that could fail.
So plenty to choose from. Motor & magnet is another option.
NT
Choose away - fitting a PTC/NTC where a PTC/PTC should be; usually blows away a few copper tracks.
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