Discharging a VT100 CRT
ard at p850ug1.demon.co.uk
Sat Nov 5 19:03:24 CST 2005
> Yes, I'm in IL. Are you a business?
> I probably need a VT100 power supply, as I found out it wasn't just the
> flyback that blew.
The PSU rarely fails, and if it does, it's one of the nicest SMPSUs to
repair since all the control circuitry is on the 'isolated side', the
drive to the chopper transistor being transformer coupled.
Very often one of the diodes on the vidoe board fails -- one of the
diodes that rectifies the output from the flyback transformer to produce
the CRT voltages. This is often the reason that the flyback fails in the
first place. I would look at those first.
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