[TechAssist] Re: Mitsubishi VS-507CA fold-down projection TV, 1987 model, red gun flaring

  • From: Kevin <kevintv@xxxxxxx>
  • To: techassist@xxxxxxxxxxxxx
  • Date: Fri, 06 May 2005 13:01:41 -0700

I turned the red gun almost off and the flaring was still noticeable.
Turning down the contrast and brightness had more of an effect, but made
the picture too dark.

Kevin Wilks
Kevin's TV & Video Repair
Penticton BC Canada
kevintv@xxxxxxx 
 

-----Original Message-----
From: techassist-bounce@xxxxxxxxxxxxx
[mailto:techassist-bounce@xxxxxxxxxxxxx] On Behalf Of Phil Bader
Sent: Friday, May 06, 2005 12:57 PM
To: techassist@xxxxxxxxxxxxx
Subject: [TechAssist] Re: Mitsubishi VS-507CA fold-down projection TV,
1987 model, red gun flaring

Kevin, have you tried to readjust the red screen control up or down and 
see the reaction?
Phil Bader

Philip Bader
Jan Phyl TV Inc. (estab. 1976)
3420 Recker Hwy. Winter Haven, Fl. 33880
Fax (863) 299-8821
email: tjanphyl@xxxxxxxxxxxxxxx



Kevin wrote:

>Is there a circuit fault that could cause just the red gun to flare (to
>the right of people's faces and objects) in this 18 year old set?  The
>tubes test OK on my B&K, and I couldn't rejuvenate them like I normally
>do.  When I pressed the rejuvenate button the needle moved up and
stayed
>there for 30-40 seconds and did not move back and forth like it
normally
>does after a few seconds showing that it is working.  
>
>If it is the red tube, what causes it to flare?  I can understand when
a
>picture is dark that the cathode is covered in oxide, and that
>cleaning/rejuvenating cleans off this covering.  But what goes bad in
>the tube that causes it to flare?  Thanks.  
>
>Kevin Wilks
>Kevin's TV & Video Repair
>Penticton BC Canada
>kevintv@xxxxxxx 
> 
>
>
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