Richard Steinfeld said:
Tony wrote:...
you may have a roller problem. They can be cleaned with
I have used isopropyl alcohol (strong: 92% and up) and methyl alcohol
for decades cleaning rubber drive parts in audio equipment. I have had
-zero- problems with these liquids; if anything, regular use has
prolonged the life of the rubber! This has been especially true where
oil could contaminate and attack the rubber.
However, ethanol (ethyl alcohol) has been a disaster, destroying the
same rubber parts. I wonder if people who write manuals just repeat what
they read in other places over and over again without applying any
thought to their plagaurism. This is, of course, especially true of
documentation from the Orient, where people with an imperfect knowledge
of English are put in the position of turning out manuals, and don't
even realize that they're using the wrong words and writing nonesense.
Is there any real reason that anyone knows why isopropyl alcohol should
not be used on HP's rubber rollers?
And by the way, how does one go about getting at the 940C's rollers in
order to clean them? HP has an on-line document for the 900 series that
recommends cleaning the rollers, but gives no information about how to
do it!
Richard
Firstly the question of Isopropyl Alcohol....
I have been using it for years with great success but someone with detailed
knowledge of the roller constituents may have more knowledge than me about what
damage can be done using this substance. For me the question is simple, if the
printer is not feeding paper and you can get a good deal of extra life this way
then why not? The alternative of replacing the rollers is not practicable.
Someone with chemical knowledge may well have more to say about this.
The rollers are not too hard to get at, there are two sets.
The rear set in the turnaround station is easy, just remove the back door (or
duplexer if fitted) and the rollers are in clear view and can be turned gently
by hand.
The front set really needs the cover removed but are partly visible if you open
the top cover, they can be turned using a gear to the left but with some
difficulty (much easier with the cover off).
Removing the cover requires the carriage to be moved away from the service
station (at right) by pulling the power cord when the carriage is away from the
station. Remove two screws under the top cover, there are two clips at the rear
(outside the cover and operated by plastic tabs with the back door removed) and
two at the front but a little difficult to get at without a long screwdriver
you can see the clips at left and right inside the printer....there is a bit of
a knack to this. Then unplug the cable to the control panel with great care.
Tony