Lexmark E320 Service Manual - Page 109
Operator panel service check, Warning
UPC - 734646511162
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4500 Operator panel service check Inspect the operator panel cable for damage. Make sure the cable is plugged in securely. Run POST and check each light for proper operation. Warning: Do not replace the operator panel and controller card at the same time. Each card contains the printer settings. When either of these cards is new, it obtains the settings from the other card. Settings are lost when both are new at the same time. Diagnostic information 2-79
Diagnostic information
2-79
4500
Operator panel service check
Inspect the operator panel cable for damage. Make sure the cable is
plugged in securely.
Run POST and check each light for proper operation.
Warning:
Do not
replace the operator panel and controller card at
the same time. Each card contains the printer settings.
When either of these cards is new, it obtains the settings
from the other card. Settings are lost when both are new
at the same time.