[TechAssist] Re: Mitsubishi VS5007R AND VS5017R SCHEMATICS
- From: "Terry H." <tvdoc@xxxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Mon, 18 Aug 2003 07:13:03 -0500
Jorge, I'm back in the middle of a VS6004 for the same problem Repaired it a
few months ago for that problem and several others. Now, the vertical
rolling is back, just not constant. We're both going to end up marrying
these. If you've changed the caps around IC2A01 and B01, then I'd look on
the sweep side at IC201 which is where I'm going to work over next. Unit is
too big to bring back to the shop. If you correct yours before I get done,
please post and I'll do the same. Good luck.
Terry H.
The TV Shop
Gonzales, Tx
----- Original Message -----
From: "Jorge Camboni" <geo@xxxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Sunday, August 17, 2003 8:29 PM
Subject: [TechAssist] Re: Mitsubishi VS5007R AND VS5017R SCHEMATICS
>
> Leonard, in the case of the 5007R it had been done (?) maybe
> 1 year or 2 ago, I found it resoldered here and there, you know,
> not a very neat job, but the only problem was picture rolling vertically,
> in other words, no vertical sync. I dismanteled it at the customer's
> place and brought the 2 main modules to the workshop.
> I left the power supply board aside because it was obvious the
> problem was not there. After esr-ing all the way, found a bunch
> of 10mf 50 volts dry caps and a few more, don't remember the
> values now. One of them coincided with a former tip from WA6ATI , so
> I felt confident and put everything together again.. SAME PROBLEM
> I really feel I need the schematic, I can not go on blind testing
component
> after component, whitout even knowing the sinc pulses path..
>
> The other one is a VS4517R (same as VS5017R) and it came with a
> TO220 pnp transistor (the kind formerly used for vert out) and a 100 ohms
> resistor burned-open (I had to guess the value) After that it comes on
normally
> (HV - fils OK) but with a nice black screen, nothing you do can awake the
> tubes,
> the voltage at the video outputs' collectors is a nice 224v all the time.
> I had not paid attencion to the video and in-out board on the side but
> there are
> several UGLY traces of capacitors leaking hard..
>
> To put it a little worse, I ESTIMATED LOW, which has been extremely
stupid
> from my part!! I had fixed several of them in the past, but it seems I
've
> forgotten
> to change ALL the caps and ESTIMATE HIGH.
>
> Thank you very much for your help
> best regards
> Jorge
>
>
>
> At 01:20 p.m. 17/08/03 -0400, you wrote:
> >Jorge, you will need to check all five major boards carefully for leaky
> >caps. Estimate high. We rebuild lots of these and almost always see
over
> >100 bad electrlytics on the V11 and 30 - 60 on the V12. If you don't go
> >over the boards carefully and clean them up and resolder bad joints you
can
> >expect more problems. These manuals were never available from Mits
> >electronically. Unless someone has scanned it you won't find it online.
I
> >have a copy on paper for both, if you need some part of it I can fax it
to
> >you. What kind of problems are you having? I don't have anything on the
> >ctc211a.
> >
> >Leonard Caillouet
> >Electronics World
> >Gainesville, FL
> >
> >
> >----- Original Message -----
> >From: "Jorge Camboni" <geo@xxxxxxxxxxxxx>
> >To: <techassist@xxxxxxxxxxxxx>
> >Sent: Sunday, August 17, 2003 5:41 AM
> >Subject: [TechAssist] Mitsubishi VS5007R AND VS5017R SCHEMATICS
> >
> >
> > >
> > > Mitsubishis VS5007R (chassis V11) and VS5017R (chassis V12)
> > > ruining my life. Anybody knows a source for those service manuals
> > > or just schematics ONLINE for this models/chassis?? CUSTOMERS WON'T
> > > WAIT until a paper manual arrives.... (no sams, no tvdiagrams)
> > > Looking for CTC211A schematics, as well..
> > > TIA
> > > Jorge
> > >
> > >
> > >
> > > Jorge Camboni, GY Electronics, Richardson, TX
> > >
> > >
>
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>
> Jorge Camboni, GY Electronics, Richardson, TX
>
>
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