WG6100 picture fluctuation

From: Mark A. Jenison <jenison_at_cig.mot.com>
Date: Tue Feb 01 2000 - 10:18:58 EST

Hi all,

I've got a WG6100 here that's really puzzling me.

The picture fluctuates (squishes up and down, left and right), and is
rather small. Pressing and tapping on the deflection board has a
direct effect. It is acting like an intermittent connection, but
the fact that it is in both directions (X and Y) at the same time leads
me to believe it is more power related.

I have installed an entire Zanen cap kit in the monitor. I have
resoldered all the pins (and taken some same paper to the pins to
roughen them up), and resoldered anything that looks like it might
have a bad solder joint. Check the main connector pins.

A bunch of snapping seems to be coming from underneath the focus and
screen knob on the HV unit. I can't tell it if is directly proportional
to the screen fluctuations because both are happening too fast. The
smaller picture (and the snapping) leads me to believe the HV is being
driven too much (possibly?).

Swapping out a known good deflection board solves all problems, so it
appears to be local to the deflection board. Any ideas what part of the
circuit could be causing this?

--
Mark Jenison
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Received on Tue Feb 1 10:33:17 2000

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