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Ikegami pm 909 shrinking picture

I have a PM 909 that is working in all respects except the 9 inch screen has a miniature picture @ 2.5". This has been shrinking over a period of months. I have checked most of the electrolytic caps. Any suggestions would be appreciated. also I only get 8 volts at tp1 instead of 11

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The deflection current is dropping in both vertical and horizontal. This suggests a low B+.This can also be caused by a flyback problem. Check all the Caps in the HV section. If not, it's the flyback.


Posted on Aug 18, 2008

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Those mica and ceramics don't usually go bad.

if the B+ is low, then keep looking there. It may be in the bias voltage of the regulator? If I had a schematic and some voltages from tests, I might be able to pinpoint it.

Aug 18, 2008 | Surveillance Cameras

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