Lexmark X500N, Service Manual

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Diagnostic aids
3-11
Lexmark confidential until announce edited 1/4/2007 7100-XXX
X500 EP steps in detail
Step 1: Charge
During the charge step, voltage is sent from the high voltage power supply to the charge roller inside the
photodeveloper. The charge roller is part of the photodeveloper unit.
The charge roller puts a uniform negative charge over the entire surface of the photodeveloper to prepare it
for the laser beam. This is the charge process.
Look at callout 1 in the picture below. This is the location of the charge roller inside the photodeveloper. The
charge roller is the main component in step 1 of the EP process.
Note: If the surface of the charge roller is damaged (such as a nick or pit), it will cause the charge to be
uneven on the photodeveloper. This will cause a repeating mark on the printed page. Check the service
manual for the repeating marks table.
Note: If the charge roller is severely damaged, the surface of the photodeveloper will not be charged
properly and heavy amounts of toner will be deposited on the photodeveloper. This will cause the printed
page to be saturated with 100% of each color.