Found this on a web search:

   "Stabilant 22A"
   "Great for revitalization of LCD contacts"

http://www.micro-tools.com/Merchant2/merchant.mv?Screen=PROD&Store_Code=MT&P
roduct_Code=22A-F

Perhaps this is a specific application only to the particular
LCD they refer to ... proceed at one's own risk!

RF Jim

----- Original Message -----
From: "Robert Rolf" <robert.rolf@UALBERTA.CA>
To: <PICLIST@MITVMA.MIT.EDU>
Sent: Saturday, August 10, 2002 10:15 PM
Subject: Re: [EE]: Fluke meter LCD problem


> Contact enhancers would probably make all the segments turn on because of
> cross channel conductivity.
> Could also cause the rubber in the Zebra stripes to break down in time if
the
> residue is the least bit oily (and most are, to act as an air barrier).
>
> The impedances involved are so high, anything the least bit conductive
will give
> crosstalk. Be prepared to thoroughly clean off anything you apply if it
> does mess up the display.
>
> The long term problem with the displays may be inadequate clamping
pressure.
> It only takes a few mils error in thickness to go from manufacturer's spec
> for pressure to 'too low to last'.
>
> I had this problem (Z-sripe fatigue) with several Beckman DVM's back
> in the 80's. Used a shim of paper under the plastic clamp to permanently
> (more or less) fix the problem. That might be an option for the Fluke's
> although the display clamp geometry is quite different.
>
> Robert
>
> Jim wrote:
> >
> > What would a touch of "Caig" contact enhancer
> > do I wonder?
> >
> > RF Jim
> >
> > ----- Original Message -----
> > From: "Randy Jones" <randyjones@WORLDNET.ATT.NET>
> > To: <PICLIST@MITVMA.MIT.EDU>
> > Sent: Saturday, August 10, 2002 8:07 PM
> > Subject: Re: [EE]: Fluke meter LCD problem
> >
> > > Neil,
> > >
> > > I have a Fluke 87 DMM built somewhere around 1993 to 1995, and it
> > > periodically needs repair for the same symptoms you described -- a
gradual
> > > "dimming" of the LCD display.  Maybe a better way to describe it is a
loss
> > > of contrast so that the numbers no longer appear different from the
> > > background.
> > >
> > > A couple Fluke reps at a trade show immediately knew the problem
(guess it
> > > was common) and showed me what to do.  The meter must be disassembled
to
> > the
> > > point where the LCD glass can be removed.  There are a couple rubbery
> > > components that are apparently the (non-metallic) conductors to the
LCD
> > > glass.  I'm not familiar with the construction technology, but they
need
> > to
> > > be cleaned, perhaps with a swab moistened with alcohol.  They may have
> > used
> > > a pencil eraser, I don't recall at this point.
> > >
> > > I just did mine a few minutes ago to prepare this response.    This is
> > > probably the third time this repair has been needed.  The display had
> > become
> > > so faint that I haven't used it meter for some time.  I hope yours is
the
> > > same thing, and is as easy to perform as on the 87 (which is now
working
> > > fine once again).
> > >
> > > Best wishes,
> > > Randy Jones
> > >
> > >
> > > ----- Original Message -----
> > > From: "Pic Dude" <picdude@PILOTTOOLS.COM>
> > > To: <PICLIST@MITVMA.MIT.EDU>
> > > Sent: Saturday, August 10, 2002 11:57 AM
> > > Subject: [EE]: Fluke meter LCD problem
> > >
> > >
> > > > Got a Fluke 8060A DMM here, that has had an LCD problem since it was
> > > > new.  The LCD display is dim, and over time has dimmed more to the
point
> > > > where it's almost gone.  I used to be able to see enough to use it,
and
> > it
> > > > worked well otherwise.
> > > >
> > > > Any thoughts on what might be wrong, or how to go about analyzing
this?
> > > > I'm hoping that it's just a display connector or something simple.
> > > >
> > > > Cheers,
> > > > -Neil.
> > > >

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