[TechAssist] Re: Toshiba 57H84
- From: "markbrock" <markbrock@xxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Sat, 5 Feb 2005 05:30:55 -0600
I un-hooked the blue hv lead at the splitter, and red/green pix came up with
sound, ( only let it run for second ) so must be the blue gun I didn't mess
with the yoke plug, could it still be just the yoke ? can I unplug a yoke
and leave the hv lead hooked up to find out for sure ? I'm pretty sure that
would put a single bright dot in the tube and most likely burn the
phosphorous even with the screen down ?
sure appreciate any advise
Brock Electronics
R.R.4 box 237
5208 cr.3385
Independence Ks. 67301
620-331-0235
fax 331-7191
markbrock@xxxxxxxxxxxxx
Zenith*Philips*Peavey*Fender*Crate
we work on all brands,makes,models
of anything that plugs in the wall
----- Original Message -----
From: "Kevin" <kevintv@xxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Friday, February 04, 2005 7:41 PM
Subject: [TechAssist] Re: Toshiba 57H84
> I would remove the HV lead from each tube separately and turn the set on
> for a split second to see if it still goes into shutdown. If all tests
> good there, I would measure the yoke windings to see if they all measure
> about the same. I had one Toshiba 2 years ago that had the vertical
> windings shorted, and the good ones measured 7 ohms and the bad one
> measured 5 ohms. I found that one by disconnecting the yoke windings
> one at a time. I was told after that that may not be the best way to
> test it. But it worked this time for me. Measuring the yokes is the
> safest way. The bad yoke also rang low as well on my Sencore cap and
> flyback tester.
>
> 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 markbrock
> Sent: Friday, February 04, 2005 6:36 AM
> To: techassist@xxxxxxxxxxxxx
> Subject: [TechAssist] Re: Toshiba 57H84
>
> John: Is this as easy as just un-hooking from the splitter ? what about
> the
> beam current? will it burn the phosphorous ? seems like I messed up an
> RCA
> one time doing that. I see no cracks, or fluid in the tubes.
> brock
>
> Brock Electronics
> R.R.4 box 237
> 5208 cr.3385
> Independence Ks. 67301
> 620-331-0235
> fax 331-7191
>
> markbrock@xxxxxxxxxxxxx
> Zenith*Philips*Peavey*Fender*Crate
> we work on all brands,makes,models
> of anything that plugs in the wall
> ----- Original Message -----
> From: "John @ Myers TV" <myers_tv_b@xxxxxxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Thursday, February 03, 2005 5:48 PM
> Subject: [TechAssist] Re: Toshiba 57H84
>
>
> > Mark,
> >
> > I just did one where I had to isolate the tubes. I ran the set for a
> moment
> > with the blue CRT unhooked. Everything ran OK.
> > In my case, the face of the blue CRT had cracked. This loaded down the
> > splitter
> >
> > John Myers
> > Myers TV Service Company
> > 376 E. State St.
> > Alliance, OH 44601
> >
> > phone: (voice & Fax) 330-821-6545
> > myers_tv_b@xxxxxxxxxxxxx
> > www.myerstv.net
> > ----- Original Message -----
> > From: "markbrock" <markbrock@xxxxxxxxxxxxx>
> > To: <techassist@xxxxxxxxxxxxx>
> > Sent: Thursday, February 03, 2005 5:06 PM
> > Subject: [TechAssist] Toshiba 57H84
> >
> >
> > > this one is eating my lunch, customer said it had squiggly lines
> then
> > just
> > > quit, I suspected the convergence IC's and knew they would cause
> shut
> > down
> > > on Toshiba's, so ordered, replaced, no help, I then un-hooked the
> > > hi-voltage lead from the fly to the splitter and it stays on with
> sound
> > but
> > > of course no pix, I ordered and replaced the splitter, same thing,
> so
> > the
> > > splitter probably is not the problem, so now where do I go to ??
> > original
> > > problem was jumpy pix while customer was watching then shut down.
> flybac
> > ?
> > > is it on the deflection board or how do I isolate a tube, can I
> unplug
> > them
> > > ? yoke ? hheeellllpppp please
> > > brock
> > >
> > > Brock Electronics
> > > R.R.4 box 237
> > > 5208 cr.3385
> > > Independence Ks. 67301
> > > 620-331-0235
> > > fax 331-7191
> > >
> > > markbrock@xxxxxxxxxxxxx
> > > Zenith*Philips*Peavey*Fender*Crate
> > > we work on all brands,makes,models
> > > of anything that plugs in the wall
> > >
> > >
> >
> >
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