CTX CVP-5468NI picture increased width then shrank

[Username1]

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Well I don't know how this thing works, I did see the spec sheet for the deflection chip
you posted, and it seems to have a very wide frequency range that it will work under.
But still uses the same vert. & horiz output drivers, transformers, yoke etc. So that
means the output circuit needs to have a wide bandwidth with relatively linear
flat response. The Q&A Board with a symptom "5468 Hori linearity problem
C322 .39J 400v. ESR should be less than 10." Could lead to the problem,
or that part of the circuit where you need to test a lot of components blindly.
Without a schematic you have to start somewhere, it might as well be C322.

That cap they are saying something about it's ESR, so could that cap be in a
spot that might effect the frequency roll-off of the horiz. deflection? Don't know.

Without a service manual, which often may have a theory of operation section,
may explain what parts are dependent on mode, and which are not.

Someone here once had a tv they were fixing and no one could find a service
manual for, so he drew a circuit himself of the tube and attaching parts and
figured out what he had to do to get it fixed. If you don't find a service
manual, you may just have to track down this cap C322, and figure out
if it's important or not.... It's just my 2 cents as to where I would start.
Again with the information available, which ain't much, it's gunna be
hard to pick a starting point.

If there were multiple pictures side-by-side, or some non synced
picture, I might suspect the mode switching section, that's just
my thinking, it's somewhere else, I could be wrong. I have not
had this problem on a multi-synced monitor.



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