[TechAssist] Re: Toshiba 57H84
- From: "Jeff Farnsworth" <jlfonz@xxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Sat, 5 Feb 2005 10:36:07 -0600
I remember having a couple of toshes with the blue yoke going bad
also---same symptom. Pull the yoke and inspect it closely. One of the two
had a burnt spot---had to look at it about 3 times to see it. Actually, I
didnt see it then I finally just ordered the yoke, THEN I saw it. I rang it
and rang it and it never showed bad.
TV Doctor
Avalon,Wi
----- Original Message -----
From: <damon101@xxxxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Saturday, February 05, 2005 7:19 AM
Subject: [TechAssist] Re: Toshiba 57H84
> Just pull the blue crt board off and then you can run it for hours if you
> want, but really without the HV the crt won't light anyways......
>
> Damon Brunger
> Telrad Electronics
> Fort Wayne IN
> ----- Original Message -----
> From: "markbrock" <markbrock@xxxxxxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Saturday, February 05, 2005 6:30 AM
> Subject: [TechAssist] Re: Toshiba 57H84
>
>
> > 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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