[TechAssist] Re: Sony 20" monitor Intermittent poor Focus
- From: Gary McCartney <gary@xxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Wed, 11 Dec 2002 21:24:40 -0500
That sounds interesting. Are there any spark gaps that could be leaking,
or possible leakage in the CRT socket? I've never worked on a dual focus
problem. I'm wondering if it is possible to disconnect the one focus and
monitor the KV of the other focus to see if it still has the 2 states?
Does tapping on the CRT neck make it change states?
Gary McCartney
McCartney Electronics
7134 Fife Rd, RR 7
Guelph Ontario Canada N1H 6J4
Fax: (519)821-1530
email: gary (at) number63.ca
Mykeelike@xxxxxxx wrote:
>
> In a message dated 12/11/02 5:23:27 AM Pacific Standard Time,
> peggs@xxxxxxxxxxxxxx writes:
>
> >
> >
> > The 2 leads going to the CRT Socket are H and V Focus,I
> > ass-ume.I think this is called Dual Focus,but I could be wrong.
> > Anyway,does your monitor look fine when you turn it off
> > and right back on(after the poor focus has appeared of course) ???
> >
> > Peggs
> >
>
> sometimes it does and sometimes it doesn't. i know that i can always refocus
> it using the two controls on the focus block. there seems to be two discrete
> focus states for my monitor.for instance I'll turn on the monitor and if it
> comes on out of focus i will measure the focus voltages, the v will be 5.3kv
> the h will be 4.8kv.then i will adj. both controls to acheive good focus and,
> when i measure the voltages again the v is 4.1kv and the v will be 3.6 kV pix
> looks good. 15 min later I'll look around and the pix will be out of focus
> again. measure voltage to find v still 4.1 kV h still 3.6kv. refocus it for
> good pix measure voltage v 5.3kv h4.8kv.the monitor i have doesn't seem to
> care if its cold or warm it randomly toggles between two focus states.
>
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Gary McCartney
McCartney Electronics
7134 Fife Rd, RR 7
Guelph Ontario Canada N1H 6J4
Fax: (519)821-1530
email: gary (at) number63.ca
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