[TechAssist] Re: Mitsubishi VS6015R
- From: "Damon" <damon101@xxxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Tue, 2 Mar 2004 07:23:04 -0500
My first thought is.....if 130v is there, and the HV shutdown circuit isn't
triggered....then I would suspect the video jungle's supply -No pix, bad
vert/horiz......one failure, many symptoms.
I have the schematics too, but they are at the shop.
Leonard is right about the caps, I had one of these with intermittant video,
and changed a handful of caps in the video circuit. It didn't fix it, as the
S-video switch was flaky, but it did improve the picture quality.
Like you care about that, right? Just throwin' a few at you.
Damon Brunger
Telrad Electronic Services
Ft Wayne, IN 46815
----- Original Message -----
From: "Leonard G. Caillouet" <lcaillo@xxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Monday, March 01, 2004 3:12 PM
Subject: [TechAssist] Re: Mitsubishi VS6015R
> Is the mirror out of position?
>
> This is a V10 chassis. Expect a couple of dozen bad caps and check the
ones
> at the back of the board between the FBT and IC502 in particular if you
have
> a shutdown problem. I have one on the bench right now if you need some
> comparison measurements, but we are going through all the caps before
doing
> any troubleshooting. Too may wierd problems on these are due to
electrolyte
> or bad caps.
>
> Leonard G. Caillouet
> Electronics World
> Gainesville, FL
> 352-332-5608
> 352-332-5668 (fax)
>
> ----- Original Message -----
> From: "Paul" <dntwntv@xxxxxxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Monday, March 01, 2004 2:13 PM
> Subject: [TechAssist] Re: Mitsubishi VS6015R
>
>
> > As mentioned, the picture is as described at all times. The 130v is
there
> all the time, as well as the rest of the SMPS voltages. Yes I have been
> monitoring with a scope from the start. Yes I have schematics. As
mentioned
> it will not restart after shut down for an hour or so. SMPS uses a relay.
I
> tried to put as much information in the original post as I could with out
> writing a book. One thing that I didn't mention is that it does try to
> start. I can see the HV for a split second on my scope. Paul
> > Damon <damon101@xxxxxxxxxxxxxx> wrote:1 Is your pix normal then shrinks
> before shutting down?
> > 2 If you unplug it after shutdown, will it restart?
> > 3 What is your 130V supply voltage running at before shutdown/after
> > shutdown?
> > 4 Got schematics for this?
> > 5 Got 'scope for this?
> > 6 Is the SMPS powered thru a relay? If not, are you getting the On
command
> > from the Micro to the switched regulators??
> >
> > Answer these questions and we might have a starting point to isolate
your
> > problem.
> > (just slip your answers underneath each question)
> >
> > Damon Brunger
> > Telrad Electronic Services
> > Ft Wayne, IN 46815
> >
> > ----- Original Message -----
> > From: "Paul"
> > To:
> > Sent: Sunday, February 29, 2004 10:20 PM
> > Subject: [TechAssist] Mitsubishi VS6015R
> >
> >
> > > This shuts down after 10 to 20 min. Will not start again till it sets
> for
> > an hour or so. It is shrunk vertically top and bottom with a bow top and
> > bottom. It is pulled in on the sides slightly, with a slight bow. Horiz
> > width adj.does not have enough to fill it on the sides. I have replaced
> the
> > vertical I/C, caps except the tant.caps and zener diode on pin 1 of I/C.
> > Have replaced too many other caps to mention. The power supply voltages
> are
> > all there. Can not find anything over heating. Have been through the
> > convergence circuit and replaced several bad caps. Have replaced the
video
> > output transistor on all the picture tube boards.Have replaced the HOT.
> The
> > sound is normal. It gives no symptom before shut down. Don't know where
> else
> > to look. Paul
> > >
> > > Paul ,B
> > Central TV&Video
> > Grover Beach Ca.
> > >
> > >
> >
>
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> > Paul ,B
> Central TV&Video
> Grover Beach Ca.
> >
> >
>
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