Lexmark C91 Series, Service Manual

Page: 51 / 493

Diagnostic information
2-1
5055-xxx
2. Diagnostic information
The diagnostic information in this chapter leads you to the failing
part. Before you replace an entire assembly, determine if just the
defective part is available in the parts catalog. Use the error code
tables, symptom table, service checks and the diagnostic aids
chapter to determine the symptom and repair the failure. The
removal procedures in the Repair information chapter may help you
identify parts. After you complete the repair, perform the appropriate
tests to verify the repair.
If an error is displayed, locate it in the “Service error message
tables” on page 2-4 , the “Attendance messages” on page 2-34 ,
or the “Symptom table” on page 2-63 and take the appropriate
action.
If an error message appears while you are working on the printer, go
to the error message table and take the indicated action.
Adjustments and procedures following parts
replacement
Note: When troubleshooting, or prior to making any adjustment to
print quality, always be sure:
•
The printer is installed on a level rigid surface.
•
The photodevelopers are never exchanged. Do not exchange a
black photodeveloper for a color photodeveloper, as they have
different surface phase counts.
•
The Alignment Page is used when adjusting print registration.
Whenever you replace any of the following parts be sure to perform
the required adjustments or procedures. The adjustments are in the
Repair information and Diagnostic aids chapters.