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Fuzzy monitor

By Cazen ·
A user has a CTX 19" monitor that has gone fuzzy. Tested on various systems confirms that the monitor is at falt. All the monitor built-in settings are correct. I seem to remember this being a problem on an old tv, and the fix was something like de-magnetizing the flyback transformer coils. My question is: Is this known to be fixable or should I just get a new monitor?

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Fuzzy monitor

by dcarr In reply to Fuzzy monitor

Sometime de-magnetizing will work. I've found that you can usually adjust the focus and fix the fuzzieness if it's not too bad. Most monitors have an internal adjustment on the back, through a little hole to re-adjust the focus. This is near or on the flyback transformer. You should use a plastic or ceramic screw driver tool while the monitor is on. If this does not fix the problem then you should problably think about replacing the monitor.

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by Cazen In reply to Fuzzy monitor

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by OTL In reply to Fuzzy monitor

Look for a DEGAUZE button on the monitor, most have this to clear (demagnetize) the screen. If you can not find one check the manual for the monitor.

Turn the auto-adjust feature off on the monitor and adjust it manually, auto-adjust could be messed up or dying.

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by Cazen In reply to Fuzzy monitor

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by richard_barsby In reply to Fuzzy monitor

If it is magnetised it usually causes poor purity rather than a fuzzy picture, it can affect the convergence but this would show up as colour misalignment usually in the corners, for the focus beeing out did it happen suddenly or over a period of time, if over a period of time then the flyback transformer (extra high voltage transformer)
has high value resisters potted in it which can change value and if not too bad can be re-adjusted the controls are on the flyback transformer at the end of the thick high voltage lead coming from the top of the tube,
there are usually 3 controls the bottom being the screen (G2) which is the preset brightness and the other two being horizontal & vertical focus they do interact a little so a little tooing and froing may be required. This all asumes that the heater voltage is not too low it should be between 6.0 and 6.3 volts DC. If it happened suddenly then it can be caused by an internal leakage in the tube and to clear this is not a D.I.Y. job.Best regards

R.K.Barsby

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by Cazen In reply to Fuzzy monitor
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by Cazen In reply to Fuzzy monitor

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