Lexmark W820 - Optra B/W Laser Printer Service Manual page 86

Step Actions and Questions
4 FINISHER MAIN BOARD
Replace the Finisher Main Board. Go to
Main Removal" on page
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?
5 PATH PAPER INSPECTION
Inspect the Drive Rolls in the Finisher, especially the Input
Rolls and the Registration Rolls.
Are all of the Drive Rolls in the Finisher clean and free of
obvious wear and damage?
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 to the Registration 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.
• Wiring and connectors linking the FRUs
292 - Attendance Message
Logic Control sensed that the Exit Roll Interlock Switch is actuated.
Step Actions and Questions
1 EXIT ROLL INTERLOCK INSPECTION
Remove the Top Covers and inspect the Exit Roll Unit and the
area around the Exit Roll Interlock Switch.
Is the Exit Roll Unit in good condition and is the area clear
of obvious damage?
2-26
Service Manual
4025-Finisher
"PWB Assembly-
4-132. Enter Diagnostics and check
Yes No
Problem Replace the
solved MCU Board
Go to step 6 Replace the
suspect Drive
Rolls
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 Replace the
suspect FRUs