Lexmark E310 Manual Do Utilizador

Diagnostic Information

Inspect the operator panel cable for damage. Make sure the cable is 
plugged in securely.

Run POST and check each LED for proper operation.

Models E310 & E312
Operator Panel
Operator Panel Cable

If more than one LED does not turn 
on or an individual LED stays on 
solid during POST, check the 
operator panel cable for continuity. 
Replace if defective. If the cable 
measures continuity, replace the 
operator panel.

Models E310 & E312
Operator Panel
Operator Panel Cable
Controller Board

If all LEDs are dim and operate 
erratically during POST or all LEDs 
come on and stay on solid during 
POST, replace the following FRUs 
one at a time in the order shown:

Controller Board
Operator Panel
Operator Panel Cable

If none of the LEDs come on, make 
sure the cable is properly connected 
to the operator panel and the 
controller board. Disconnect the 
cable and check it for continuity. 
Replace if necessary. If the cable 
measures continuity, measure the 
following voltages with the printer on 
at idle:

U5-1: Ground
U5-2: +5 V dc
U5-3: +5 V dc
U5-5: +5 V dc
U5-6: Ground

If these voltages are not correct, 
replace the controller board. If these 
voltages are correct, replace the 
operator panel.