Canon scanner (CanoScan 8000-F)

External Since: Dec 04, 2006 Posts: 145

Ï "John Vanini" Ýãñáøå óôï ìÞíõìá

> "Paul D Moore" wrote in message
>
> > <snip>
> >
> > This problem is very common, particularly with Epson scanners. I've had
> > new scanners from Epson delivered like this. The problem is condensation
> > forming under the glass. It won't disappear over time, it will get
worse.
> > It is made worse if the scanner is left in a moist atmosphere The effect
> > is the same as on a bathroom window. If you leave a windowpane uncleaned
> > in a bathroom it will start to look exactly the same as your scanner
over
> > a period of time. It's the tiny particles of dust/dirt/grease etc that
> > stick the surface when the steam is formed and condenses on the glass.
> > It's the same with a scanner; particles are left on the glass. It is
very
> > difficult to remove without taking the scanner apart and cleaning the
> > glass. I doubt that using silica gel will remove it. But please do let
us
> > know it works.
> >
> > Every Epson scanner I've owned has developed this problem over time.
> > Someone once suggested that with Epson its the plasticizers in the
plastic
> > that gass off. This may explain why Epsons seem to be particulary
affected
> > .Fortunately, someone posted disassembly instructions for Epson scanners
> > on one of the scanner newsgroups a few years ago. I suggest you actually
> > post to one of the scanner groups in case someone knows how to take a
> > Canon apart.
> >
> > pdm
>
> > Thanks Paul, I understand what you're saying and will see what I can
find
> > out about disassembling this one. When I rang Epson, I asked if someone
in
> > their service department could tell me how to get the glass out without
> > breaking anything, but they only wanted to discuss sending it back for
> > repair.
>
> Strangely enough, I posted to this group by accident so then posted the
same
> question to a scanner newsgroup but got only one reply from them!
>
> I'll have a look to see what other scanner groups there are but I've had a
> lot of good ideas and suggestions from this group (for which I again,
thank
> everyone) so am pleased I made the error in the first place.
>
Maybe you can post a link to a photo of the scanner's bottom? If there's any
chance of taking it apart, people in this newsgroup may help. There is also
the chance that it is simply weld together, or just has some very strange
screws that only the service may loose (a common practice now).

--
Tzortzakakis Dimitrios
major in electrical engineering
mechanized infantry reservist
hordad AT otenet DOT gr

External Since: Dec 04, 2006 Posts: 145

? "Allen" ?????? ??? ??????

> John Vanini wrote:
> > I have a Canon scanner (CanoScan 8000-F) and, some time ago, marks
looking
> > exactly like moisture trails (I'm sure that's what they are) appeared
all
> > over the inside of the glass.
> >
> > I can't find a way of removing the glass, so that I can wipe the
underside
> > clean, without risking breaking the plastic casing.
> >
> > It was just outside the warranty period (isn't it always!) and Canon
wanted
> > to charge me almost the same price as the cost of a new one.
> >
> > This 'misting' affects everything I scan in but is worse for photographs
> > where they produce dull, flat areas, which I can't find a way of
removing.
> >
> > Does anyone know of how I might get inside the scanner to clean the
glass,
> > please?
> >
> > Regards
> >
> > John
> >
> >
> I haven't read every post to this thread, so this might already have
> been suggested. I would set a hair drier to its lowest temperature and
> blow on the surface of the glass just long enough to raise its
> temperature a few degrees. If it is indeed humidity condensation it
> should disappear. If that works, perhaps you could invest in the
> lowest-price hair drier you can find, leave it by the scanner, and use
> it just before you scan each time. Incidentally, I have a 8400F, which I
> suspect is the same case design, and I can see no easy way (other than
> the "bigger hammer" approach) to get into it. I haven't had your
> problem, I'm happy to say, and I live in Austin TX, which is neither
> excessively humid nor excessively dry most of the time. May I ask where
> you live?
> Allen
That's a very good idea, and you can use a space heater with fan, too
(that's how I dried off my VCR). I had a Black&Decker scredriver for more
than 10 years, and today the cable from the charger was short circuited, and
the only way to fix it was to open the charger, and the only way to open it
was the hammer approach, since it was obviously weld together and not
screwed. So, I throwed it away, and got for 55 euros a Bosch screwdriver
with Lithium battery and cruise control....(I suggest you try the space
heater approach, before, well...)

--
Tzortzakakis Dimitrios
major in electrical engineering
mechanized infantry reservist
hordad AT otenet DOT gr