[TechAssist] Re: Zenith PVY6067DT proj. repl.HV block,bright flashesnow
- From: Philip Bader <tjanphyl@xxxxxxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Mon, 20 Oct 2003 14:54:20 -0400
This would probably not be a valid test for an intermittant Zenith
block, but Zenith tech assist gave me a tip.
locate the two wire plug assy "F4",attached to the HV block:It plugs
into the deflection board in front of the vertical board (it has a grey
and black wire). Unplug it and measure the resistance of the two wires.A
good block will measure a range between 46K and 52K ohms.
Phil Bader
Paul wrote:
>
> You could be right Phil. I was a little surprised though because it worked
> fine in the shop. I didn't think that the HV block could be intermitant. If I
> ever have that situation again, you can bet, I will replace the block first.
> Paul
> Philip Bader <tjanphyl@xxxxxxxxxxxxxxx> wrote:I bet you sent the set home
> with your new sweep board and a bad HV block
> that was a ticking time bomb. I bet the block was the issue all along.
> Had another Zenith that did what yours did. Turned out the intermittant
> HV block took out the customers orig. sweep board, then mine a bit
> later. Only when I replaced the sweep again WITH a HV block did it stay
> good.
> Will let you know when my block comes. I think I may not jerk around
> with a generac this time.
> Phil Bader
>
> Paul wrote:
> >
> > Phil, I had a similar experience with a 53" Zen Proj TV.a few weeks ago. I
> > replaced the sweep board and had trouble getting the green tube to track.
> > It would either be out of focus or not bright enough. I was able to find a
> > compromise that would work. The picture would get very bright on some
> > scenes and have a greenish cast once in awhile. I sent it home and two days
> > later the customer called and said the tv was going black but the sound
> > remained. I replaced the HV block,had the same symptom. Replaced the sweep
> > board again that fixed it. Also the green tube adjusted normally after
> > replacing the board again. You can't be sure of anything any more when it
> > comes to parts. Paul
> > Philip Bader wrote:BTW what was exactly YOUR symptom,Keith?
> > The black screen or the flashing? And did turning down the brightness
> > seem to "help"?
> > Phil Bader
> >
> > Keith Trumbla wrote:
> > >
> > > I hate to say this Phil, but I had one like that a few months back, and
> > > the
> > > generic HV blocks were bad. I went through 2 generics until I got one from
> > > Zenith and my set was fixed. Don't rule out that generic block
> > > HTH
> > > Keith Trumbla
> > > BEM Electronics Inc.
> > > Suite 212-530 Century St.
> > > WPG. MB. R3H 0Y4 Canada
> > > Ph.(204)775-2875 Fax.(204)774-9192
> > > SITE UPDATED !
> > > www.bemelectronics.com
> > >
> > > ----- Original Message -----
> > > From: "Philip Bader"
> > > To:
> > > Sent: Saturday, October 18, 2003 11:04 AM
> > > Subject: [TechAssist] Zenith PVY6067DT proj. repl.HV block,bright flashes
> > > now
> > >
> > > > When it came in, If I powered unit on, heard an instant HV shutdown.
> > > > UNplugged flyback anode from HV block (put in a glass bottle) and unit
> > > > now stays on with HV.
> > > > Replaced the HV block (orig.# A17813-01, used replacement# A17196-12 per
> > > > TriTronics)./ Powered it up. Had sound, HV but no filaments, black
> > > > screen. After going over the deflection board and just
> > > > unplugging/reseating plugs,probing parts,etc, and re-trying it,the unit
> > > > then came up and had filaments and a picture. Adjustments of the
> > > > G2/focus,was touchy.But it ran/looked OK after greyscale and
> > > > convergence.
> > > > Today after a few hrs running noticed brightness flickers 5-6 times a
> > > > second rate. Seems if I back down the brightness a bit it clears.Don't
> > > > know if this is the ABL fighting my G2 settings or a deflection module
> > > > issue. Need input here,guys,got to get this beast out of here.
> > > > 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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> >
> > Paul ,B Central TV&Video Grover Beach Ca.
> >
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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
>
> *****************************************************************************
> Classifieds! Buy or Sell!
> http://sell.tech-assist.org
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>
> Paul ,B
> Central TV&Video
>
> Grover Beach Ca.
>
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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
*****************************************************************************
Classifieds! Buy or Sell!
http://sell.tech-assist.org
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