[TechAssist] Re: Sony 20" monitor Intermittent poor Focus
- From: Kevin <kevinstv@xxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Tue, 10 Dec 2002 15:00:50 -0800
I have no experience with this model, but I have seen computer monitors
that have focus drift caused by a faulty focus pot. Only way to fix is
to replace flyback etc. HTH
Kevin Wilks
Kevin's TV & Video Repair
Penticton BC Canada
kevinstv@xxxxxxx
-----Original Message-----
From: techassist-bounce@xxxxxxxxxxxxx
[mailto:techassist-bounce@xxxxxxxxxxxxx] On Behalf Of peggs
Sent: Tuesday, December 10, 2002 1:49 PM
To: techassist@xxxxxxxxxxxxx
Subject: [TechAssist] Sony 20" monitor Intermittent poor Focus
model GDM-F500
chassis SCC-L03C-A
Nov. 1998
'Flat Tube' #M50LPU15X
This thing has Focus that will Drift very Intermittently.
It may play for days without drifting.
It has a seperate Focus 'Divider',which looks like
just a small version of a Flyback. It has one Lead in
from the Flyback,and 2 leads out to the Pix Tube Socket.
The input has 10Kv and each output has app. 5Kv,both
when the Focus is good and when it's bad.
Some of the Plugs on the CRT PCB are marked with voltages,all
of which appear to be fine.
Are these Tubes known to go bad with poor focus ???
I'm going to pull the CRT Socket to have a look at it
Peggs
Peggs' Electronics
1519 West 2nd Street
Owensboro,KY 42301
270-926-4968
fax 270-686-7399
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