Lexmark 4500-00 Series, Service Manual

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Diagnostic information
2-1
4500–E320/E322
2. Diagnostic information
Start
Diagnostics (E320/E322)
Note: For diagnostic information about models
E220/E321/E323 see
“Diagnostics (E220/E321/E323) ” on
page 2-35 for more information.
CAUTION: NEVER manually actuate or disable the top cover
interlock switch and the printhead shutter actuator at
the same time
.
To perform some of the service checks and tests, such as troubleshooting
paper feed problems, you need to actuate the top cover interlock switch
with the covers open or removed and power applied to the machine. It is
important for personal safety that you
DO NOT, FOR ANY REASON ,
disable the printhead shutter actuator when power is on.
Unplug power from the printer before connecting or disconnecting any
cable or electronic board or assembly for personal safety and to prevent
damage to the printer.
Use the service error code, user error message, symptom table, service
checks, and diagnostic aids in this chapter to determine the corrective
action necessary to repair a malfunctioning printer.
The lights on the operator panel can indicate either a user error message
or service error message. When a service error occurs, the printer stops
printing and all operator panel lights blink in a continuous pattern, indicating
a service error, until the printer is powered off. If all operator panel lights are
blinking, go to the
“Service error codes ” on page 2-11 for more
information.
When a user error message occurs, one or more operator panel lights are
on solid or blinking. See
“Status information ” on page 2-3 for more
information.
If the machine does not have a service error code and does not complete
power–on self test (POST), go to the
“POST symptom table ” on
page 2-32 . If the machine completes POST without an error, and there is a
symptom, go to the “Printer symptom table ” on page 2-33 . Locate the
symptom and take the appropriate action.