[TechAssist] Re: Sylvania SWN4620 101,PTV420-AH01 (1992 yr) no blue video

  • From: Jorge Camboni <geo@xxxxxxxxxxxxx>
  • To: techassist@xxxxxxxxxxxxx
  • Date: Wed, 24 Sep 2003 01:59:51 -0500

It is a '92 model, blue tube just can't be clean inside...
You'd better examine all 3 for contaminated coolant.
If you can see video in the blue tube, but it does not
blend with the other colours, either it is full of
algae or the emission is very low or, most probably,
both...
You did not tell us what happened when you increased
the G2 voltage (did you?)
good luck whith that piece of.......... jewelery....
Jorge


At 04:43 p.m. 23/09/03 -0400, you wrote:
>The three tubes glow to look down the lenses,but until I actually stuck
>my head inside I was not sure. I do see the video in the blue tube, but
>seems lower brightness.Not foggy, low.
>Phil Bader
>
>gulftech@xxxxxxxx wrote:
> >
> > Phil,
> >
> > Sorry, but I must ask the obvious.  Is the fluid contaminated with algae?
> >  Usually, it is bad in blue and green.  Have seen it so bad that no light
> > can pass through the fluid chamber.
> >
> > The "Speaker" had a great article on fluid changing on the NAP sets two
> > or three months ago.
> >
> > Ken Smith
> > Gulf Technical Services
> > 3034 Gulf Breeze Parkway
> > Gulf Breeze, FL  32563
> > 850-934-8324 (Voice) 850-932-0819 (Fax)
> >
> > On Tue, 23 Sep 2003 16:16:29 -0400 Philip Bader
> > <tjanphyl@xxxxxxxxxxxxxxx> writes:
> > > This Sylvania SWN4620,1992 year (PTV420 chassis)projection TV has a
> > > yellow-green greyscale to the picture. All three tubes glow, but
> > > video
> > > only from the green and red tubes. the blue tube does emit a blue
> > > glow,
> > > but no video.If I cover the red and green CRT lenses with a card
> > > board
> > > and leave the blue exposed,there is nothing on screen.
> > > Thanks,
> > > Phil Bader
> > > --
> > > Philip Bader
> > > Jan Phyl TV Inc. (estab. 1976)
> > > 3420 Recker Hwy. Winter Haven, Fl. 33880
> > > Fax (863) 299-8821
> > > email: tjanphyl@xxxxxxxxxxxxxxx
> > > For Professional Technicians Only
> > >
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>--
>Philip Bader
>Jan Phyl TV Inc. (estab. 1976)
>3420 Recker Hwy. Winter Haven, Fl. 33880
>Fax (863) 299-8821
>email: tjanphyl@xxxxxxxxxxxxxxx
>For Professional Technicians Only
>
>*****************************************************************************
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Jorge Camboni, GY Electronics, Richardson, TX

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