Lexmark W820 - Optra B/W Laser Printer Service Manual page 75

Step Actions and Questions
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.
• H-Tra drive train FRUs, including gear, belts, and rolls.
283 - Attendance Message
Logic Control sensed that the H-Tra Exit sensor was not actuated within a specified time after the H-Tra Input
Sensor was deactuated.
Step Actions and Questions
1 PATH LOCATION INSPECTION
Inspect the position of the sheet of paper on the H-Tra.
Has the lead edge of the sheet of paper actuated the H-Tra
Exit Sensor?
2 SENSOR TEST
Enter Diagnostics and check the H-Tra Exit Sensor function.
Does the H-Tra Exit Sensor test ok?
3 H-TRA EXIT SENSOR
Replace the H-Tra Exit Sensor. Go to
page 4-20. Enter Diagnostics and check the H-Tra Exit Sensor
function.
Does the H-Tra Exit Sensor test ok?
4025-Finisher
"Sensors Removal" on
Yes No
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 Go to step 5
Go to step 4 Go to step 3
Problem Go to step 4
solved
Diagnostic Information
2-15