Lexmark W820 - Optra B/W Laser Printer Service Manual page 85

Step Actions and Questions
6 DRIVE TRAIN TEST
Enter Diagnostics and select Output Bin Tests. Select Feed
Test, Output Bin 2 to run the Finisher Main Feed Motor.
Does the Finisher Main Feed Motor run smoothly?
7 DRIVE TRAIN INSPECTION
Inspect the drive train, including belts, pulleys, and gears, of
the entire Finisher Assembly from the Finisher Main Feed
Motor, through the Shift Rolls, and on to the Exit Rolls.
Does the entire drive train of the Finisher Assembly
appear to be in good condition, with no damaged or
slipping belts and no chipped or broken pulleys or gears?
8 The following Finisher FRUs and areas are associated with
this specific problem. One or more of these FRUs or areas may
have failed partially or completely. If you cannot isolate this
problem using these steps, replace each FRU or troubleshoot
each area listed below, one at a time, until you isolate and
solve the problem.
• Shift Roll Unit
• Wiring and connectors linking the FRUs
291 - Attendance Message
Logic Control sensed that the Finisher Exit Path Sensor was not actuated within the specified time after the
Finisher Path Sensor was actuated.
Step Actions and Questions
1 PATH LOCATION INSPECTION
Inspect the position of the sheet of paper in the Finisher.
Has the leading edge of the sheet of paper actuated the
Finisher Exit Path Sensor?
2 SENSOR TEST
Enter Diagnostics and check the Finisher Exit Path Sensor
function. Insert then remove a sheet of paper into the sensor.
Does the Operator Panel LCD change between OP and CL
as you insert then remove the paper?
3 FINISHER EXIT PATH SENSOR
Replace the Finisher Exit Path Sensor. Enter Diagnostics and
check the Finisher Exit Path Sensor function. Insert then
remove a sheet of paper into the sensor.
Does the Operator Panel LCD change between OP and CL
as you insert then remove the paper?
4025-Finisher
Yes No
Go to step 7 Replace the
Finisher Main
Feed Motor
Go to step 8 Replace the
suspect belts,
pulleys, and
gears
Yes No
Go to step 2 Go to step 5
Go to step 4 Go to step 3
Problem Go to step 4
solved
Diagnostic Information
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