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

  • From: peggs <peggs@xxxxxxxxxxxxx>
  • To: techassist@xxxxxxxxxxxxx, <techassist@xxxxxxxxxxxxx>
  • Date: Sun, 08 May 2005 20:50:23 -0700

Can CRT PCB's be swapped ???
Focus and anode leads also ???
that may tell you if you have a bad tube

Peggs

At 01:22 PM 5/6/05, tvservice wrote:
>try backing off on the red drive adjustment
>Robert
>tvservice@xxxxxxxxxxxxx
>H & H Electronics Inc
>
>----- Original Message -----
>From: "Kevin" <kevintv@xxxxxxx>
>To: "TECH-ASSIST" <techassist@xxxxxxxxxxxxx>
>Sent: Friday, May 06, 2005 2:35 PM
>Subject: [TechAssist] Mitsubishi VS-507CA fold-down projection TV, 1987
>model, red gun flaring
>
>
> > 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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