[TechAssist] Re: Mitsubishi VS4551 - Intermittant Dead?
- From: "Damon" <damon101@xxxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Fri, 21 Sep 2001 20:38:35 -0500
Hey Good INFO! Although I don't know what Winstips is. I found the Kit-VZPwr
info a day later from Mits and have ordered one, the IC9a0 info I'm taking
out with me to the customer's home and checking. Will let you know in about
a week or two if this fixes it. Thanks for the info guys!
----- Original Message -----
From: "Shoreline Electronics" <jstielau@xxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Thursday, September 20, 2001 8:03 AM
Subject: [TechAssist] Re: Mitsubishi VS4551 - Intermittant Dead?
>
> Damon,
>
> This was in Winstips...
>
> 1) Power Supply Intermittent Power On
> Fix : Install Pt#Kitvzpwr A. Remove Ferrite Bead (L9a30) From R9a21
> Located On The Main-Pcb.
> 2) Power Supply Power Supply Pulsates
> Fix : Power Supply Pulsates On And Off,Check Ic9a1 To Be Shorted Or Leaky.
> Located On The Main-Pcb. Pt#267p062010
> 3) Power Supply Won'T Turn On:-Osc.
> Fix : Will Not Turn On,Supply Oscillates.Check The Voltage At Pin 5 Of
Ic9a0
> If 0v.Replace Ic9a0 (Pt#267p112050),D9a00 (Pt#264p102020) On The
Main-Pcb.
>
> Jeff Stielau
> Shoreline Electronics Repair
> 125 Beechtree Lane
> Westbrook,CT 06498
> 860-399-1861 Voice
> 860-664-3535 Fax
> jstielau@xxxxxxxx
>
> ----- Original Message -----
> From: "Damon" <damon101@xxxxxxxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Thursday, September 20, 2001 2:29 AM
> Subject: [TechAssist] Mitsubishi VS4551 - Intermittant Dead?
>
>
> > Hello everybody, and Thanks in advance to anybody who has seen these
> symptoms on a Mitsubishi VS4551. My first time repairing this specific
> model.
> >
> > Cust complained of intermittant dead set. I saw it fail once, looked
like
> the Tv went black, then saw 3 flat lines (R, G, B)
> > and Tv always had sound and remote/front panel control. Turn it off for
> 20-30 minutes and it would then function fine.
> >
> > I replaced the vertical output , but that didn't fix the problem. After
> further questions I also found out that the TV when cold would not start t
he
> first time, but if turned off, then back on it would work, Lo and behold I
> got it to show that symptom. When it does that, you hear the power relay
> click, no HV or sound at all. 2nd time and it starts....
> >
> > I've worked on Mitsubishi's a long time , but this is my first VS 4551
> with these symptoms. I'm thinking it may be an intermittant SMPS output,
but
> that doesn't explain the missing picture with sound symptom, only the dead
> when cold symptom. I'm sure somebody has seen this, and thanks for any
info
> you have.
> >
> > Damon
> >
> > Help make your TechAssist online repair tips
> > database better! Submit your fixes here:
> > http://www.circuitwork.com/techassist/tip/#tips
> > To unsubscribe write to:
> > techassist-request@xxxxxxxxxxxxx
> > with unsubscribe in the subject line.
> >
>
> Help make your TechAssist online repair tips
> database better! Submit your fixes here:
> http://www.circuitwork.com/techassist/tip/#tips
> To unsubscribe write to:
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>
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