[TechAssist] Re: Mitsubishi VS45501, chassis VZ4, dim picture.

  • From: "John Mielke" <maintv2004@xxxxxxxxxxx>
  • To: <techassist@xxxxxxxxxxxxx>
  • Date: Sat, 12 Nov 2005 11:29:24 -0700

Yes, I understand bypassing the PIP. I do it often on direct view sets.  But
in this case, pulling the module did not change anything or adding the caps
did not change the brightness level (the OSD was still dim). This PIP module
does not have any surface-mount caps on it.   John.
John Mielke
Main TV
636 Main St
Longmont, Co 80501
303 776 6955
303 776 0792 fax
www.longmontmaintv.com
maintv2004@xxxxxxxxxxx
----- Original Message ----- 
From: "Rochester TV" <rochester.tv@xxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Saturday, November 12, 2005 12:03 PM
Subject: [TechAssist] Re: Mitsubishi VS45501, chassis VZ4, dim picture.


> You have to bypass the pip module, just not remove it.There are a few
> capacitor's that couple the lumanance and chromance signals.
>
> ----- Original Message ----- 
> From: "John Mielke" <maintv2004@xxxxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Saturday, November 12, 2005 11:40 AM
> Subject: [TechAssist] Mitsubishi VS45501, chassis VZ4, dim picture.
>
>
> >I have a Mitsubishi VS45501, chassis VZ4 made in 1997 that has a dim
> >picture
> > that is too bright.  It does not have retrace and does not shutdown.
The
> > customer said the problem started gradually.  I have replaced IC200
> > (CXA2095S) per winstips and checked all the electrolytics and
transistors
> > around that IC.  The brightness and contrast controls change the OSD
bars
> > but there is no change in the picture.  Color and tint controls work
> > normally.  I removed the PIP module and the picture is still bright, of
> > course with no video, and the OSD is still dim.  Has anyone seen this
> > before?  TIA, John.
> > John Mielke
> > Main TV
> > 636 Main St
> > Longmont, Co 80501
> > 303 776 6955
> > 303 776 0792 fax
> > www.longmontmaintv.com
> > maintv2004@xxxxxxxxxxx
>
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