Question about HP ScanJet 4500C Flatbed Scanner
The scanner may have one of two problems:
1. Scanner lamp has failed or does not come up to full color temp
2. Scanner attempts to initialize, which means it must move a bit to what is the "home" position where the scanner actually reads a very small coded imprint on the underside of the glass. If this area is too dusty or dirty, that will cause this problem, but also if the scanner motor and worm drive are binding for any reason, such as the scan rails internally being too dry this will also happen.
Locate a service manual and remove the copy glass by removing the lock guide on one side, the glass should lift partially, allowing some gentle cleaning with soft cloth and glass cleaner. Do not attempt to force the scanner to move inside, as it is worm gear driven and such an attempt will strip the nylon gears or worse.
Follow the manual instructions if you need to fully remove the top
cover, glass and platen assembly for cleaning. It is very simple once you are in the interior...but gentleness and care are necessary.
Sadly, parts are difficult to find for all scanners now, and it is often far more economical to replace with a new, low cost and higher performing, higher rez unit for $ 120 or less. Often a lot less.
Posted on Aug 04, 2010
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Posted on Jan 02, 2017
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