Lexmark Jetprinter 4079-00 series, Service Manual

Page: 19 / 183

Diagnostic Information 2-1
4079-00X
2. Diagnostic Information
Start
When the covers are removed, you will get a Cover Open error code.
To prevent this, tape the cover open interlock arm in the closed posi-
tion on the operator panel.
All voltages in the service checks are positive unless otherwise
noted. When measuring voltages, always use frame ground unless
otherwise specified.
Visually check the machine for obvious problems such as ink leak-
age, and worn or missing parts. Also reseat all cables, and check for
good connections.
Note the error code number, if one is displayed in the operator panel,
and the number of beeps sounded. If you have an error code, go to
the
“Error Code Table” on page 2-2 and follow the instructions for
that error code.
If no error code is present, check the NVRAM for the Last Error
code. (See the procedure in
“Controller Diagnostics” on page 3-9 ).
If no error code number is displayed, or you cannot access Control-
ler Diagnostics to check the last error code, or you have no clear
symptom, continue with this Start procedure.
If you proceed through Start, the Error Code Table, and the Operator
Codes and Symptom Table without determining an error code or
symptom, go to
“Undetermined Problem Service Check” on page
2-47 and then return here to Start.
When a service check instructs you to end the call, you should run
“Test Print A” on page 3-3.
Check the following:
1. Turn the printer off. Make sure the carriage lock is disengaged,
then turn the printer on. If there is no indication of power in the
printer, go to the
“Power Supply Service Check” on page 2-39 .