[TechAssist] Re: MITSUBISHI PROJ TV MDL: VS-5051 / NO VIDEO

  • From: "fremur01@xxxxxxxxx" <fremur01@xxxxxxxxx>
  • To: techassist@xxxxxxxxxxxxx
  • Date: Fri, 3 Jan 2003 13:57:14 -0800 (PST)

Thank's very much for the input Ed.  I found the
following voltages:  Approx 35vdc @ pin 3 and pin 6, 
2vdc @ pin 4.  All looks good there.

However upon inspection I did find a burnt resistor
(r2200) 1/4 w  adjacent to Q2023. It's tucked away
under the tuner and not too far from the PIP module.  
Do you show a value for it in your service guide? Any
input is appreciated.

Thanks!


Check For 2vdc At Pin 4 Ic401,If Missing Check For
34vdc At Pin 6 And 3
Lso Check For .8vpp Pulse At Pin 5, If All Are Present
Check 14v R

Cut and Pasted from Winstips.

-Ed-
Tel-Tek Electronics
Ontario-Canada

teltek2@xxxxxxxxxxxx
----- Original Message -----
From: "teltek2" <teltek2@xxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Saturday, December 28, 2002 11:10 AM
Subject: [TechAssist] Re: MITSUBISHI PROJ TV MDL:
VS-5051 / NO VIDEO


> Are you sure the IC is suppose to be LA7845?
>
> -Ed-
> Tel-Tek Electronics
> Ontario-Canada
>
> teltek2@xxxxxxxxxxxx
> ----- Original Message -----
> From: <fremur01@xxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Saturday, December 28, 2002 10:49 AM
> Subject: [TechAssist] Re: MITSUBISHI PROJ TV MDL:
VS-5051 / NO VIDEO
>
>
> >
> > Hello,
> >
> > This one is still being a problem.
> >
> > I replaced IC401 (LA7845) along with adjoining
> > caps in the circuit and it still has no video. Crt
> > filaments and HV are fine. I tried inspecting the
yoke
> > connectors as well.
> >
> > Anyway, does anyone with service literature know
the
> > correct Vcc voltages on the IC I should look for
in
> > the vertical circuit? This is an awkward pc board
> > so measurements should be fun.
> >
> > Thanks
> >
> > Item specs: MITSUBISHI PROJ TV   MDL:  VS-5051
> >
> > Fred
> > MTS Electronics
> > Fayetteville, NC
> > fremur01@xxxxxxxxx
> >
> > -----Original Message-----
> > From: techassist-bounce@xxxxxxxxxxxxx
> > [mailto:techassist-bounce@xxxxxxxxxxxxx]On Behalf
Of
> > Gooseman
> > Sent: Wednesday, December 11, 2002 9:20 PM
> > To: techassist@xxxxxxxxxxxxx
> > Subject: [TechAssist] Re: MITSUBISHI PROJ TV MDL:
> > VS-5051 / NO VIDEO
> >
> >
> >
> > Look at ic401 for loose connection or the
yokes.you
> > can wiggle the youe
> > plugs and usually find the 1 with the loose
> > connection.
> > Beyond that you may have a bad vertical IC.
> > Tvman99@xxxxxxx
> >
> >
> > -----Original Message-----
> > From: techassist-bounce@xxxxxxxxxxxxx
> > [mailto:techassist-bounce@xxxxxxxxxxxxx] On Behalf
Of
> > fremur01@xxxxxxxxx
> > Sent: Wednesday, December 11, 2002 4:36 PM
> > To: techassist@xxxxxxxxxxxxx
> > Subject: [TechAssist] MITSUBISHI PROJ TV MDL:
VS-5051
> > / NO VIDEO
> >
> >
> > Hello,
> >
> > Went on a call today for the following:  Set has
good
> > audio but no picture.  I noticed all CRT filaments
> > light up along with H/V buildup.  One Tech had
> > mentioned that some of these sets can have
problems
> > with the PIP module.
> >
> > Anyway, I was limited as to what could be done on
> > site, and will take set back to shop later this
week.
> >
> > I dont have service literature for this one. 
Nothing
> > looked burnt on the PIP module. Anyone know of
case
> > history info for this model?
> >
> > Thanks
> >
> > Fred
> > MTS Electronics
> > Fayetteville, NC
> > fremur01@xxxxxxxxx
> >
> >
> > Item specs: MITSUBISHI PROJ TV   MDL:  VS-5051


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