[TechAssist] Re: TA Mitsubishi WS55807/Pic expands, shuts down.
- From: "Leonard Caillouet" <lcaillo@xxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Wed, 18 Aug 2004 23:32:01 -0400
Q5A01, Q5A31 can cause excessive width and shutdown, if either fail,
suspect a bad T5A31. Had one with a bad transformer that would lose focus
then died. Cust did not complain of size changes but it is likely with this
circuit.
What does the diagnostic say? Is it in HV shutdown or H,V?
Coolant is always a good bet on these.
Had one with a flaky 12v regulator causing some strange problems.
Leonard Caillouet
Electronics World
1261 NW 76 Blvd
Gainesville, FL 32606
352-332-5608
FAX 352-332-5668
----- Original Message -----
From: "Intrepid Video Support" <support@xxxxxxxxxxxxxxxxxx>
To: "Techassist" <techassist@xxxxxxxxxxxxx>
Sent: Wednesday, August 18, 2004 10:24 PM
Subject: [TechAssist] TA Mitsubishi WS55807/Pic expands, shuts down.
>
>
> I have a bad feeling about this set. It had been worked on by a previous
servicer for the picture
> expanding, filling the screen on all four sides, like the width and
vertical are stretching and goes out
> of focus. In the past year, another servicer had this set twice, keeping
it several months each time. It
> was returned twice to the customer as "no defect found". Each time, the
set worked for the customer for a
> few weeks then did the same time.
> After speaking with the customer, he states the last time it did this,
eventually the picture and audio
> went out. The set will now come on with the power light, but there is no
video, OSD or sound.
> I called the TPA and they advised no parts were claimed on this unit.
> Customer says servicer advised him they did some soldering on the board,
but that was it.
> I checked Mitsubishi website, but can see nothing pertaining to this
problem, exactly.
> First thing I would do is check for fluid leaks and cables into HV
block..but I would expect this to have
> been checked by the other service center.
> Thanks to anyone that can offer any suggestions.
> Jeff
> --
> Intrepid Video TV/VCR Repair
> 263 S Front St, Steelton PA 17113
> 717-939-7708; (F) 717-564-4952
> www.intrepid-video.com www.tech-repair.net
>
>
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