Diagnostic Information; Diagnostic/Maintenance Approach - Lexmark Optra C Service Manual

2. Diagnostic Information

Diagnostic/Maintenance Approach

This printer can be serviced without being connected to a host
computer.
This printer will display both operator correctable errors and service
errors on the front (operator) panel. In addition, there are tests
available from the density adjustment panel on the back of the
machine that bypass the video controller board. These basic engine
function tests to enable you to eliminate potential software problems.
These tests are covered in Chapter 3, "Diagnostic Aids".
Using the diagnostic information in this manual leads you to the
correct field replaceable unit (FRU), or part. Before replacing an
entire FRU, determine if just the defective part is available in the
parts section, Chapter 7. Always replace the smallest possible part.
Use the error code charts, symptom index, service checks and the
diagnostic aids chapter to determine the symptom and repair the
failure. After you complete the repair, perform the appropriate tests
to verify the repair.
DO NOT swap parts as a diagnostic technique. Certain parts work
as a system and unnecessary swapping of these parts may lead to
print quality.
Diagnostic Information 2-1