Lexmark W820 Service Manual page 133

Attendance Message 204
There is a paper jam at the Fuser Exit Switch.
Logic Control on the MCU PWB sensed the Fuser Exit Switch did not deactuate within
the specified time after the Switch actuated.
Step Actions and Questions
1 PAPER TRAVEL INSPECTION
Remove the Fuser Full Cover.
Observe the position of the sheet of paper.
Did the sheet of paper stop on the Fuser Exit Switch?
2 FUSER EXIT SENSOR TEST
Enter Diagnostic Mode and select Fuser Exit Sensor.
Insert and 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 PAPER TRAVEL INSPECTION
Observe the position of the sheet of paper.
Is the trail edge of the paper still in the Fuser?
4 FUSER INSPECTION
Remove the three screws securing the Fuser Left Cover and
remove the Cover so you can observe the Fuser Rolls.
Hand rotate (counterclockwise) the Main Drive Motor.
Does the Pressure Roll rotate smoothly and are the Fuser
Stripper Fingers undamaged?
5 PAPER FEED TEST
Enter Diagnostic Mode and select Duplex Quick Test.
The Face Up Clutch and the Exit Gate Solenoid should
operate.
Do the Offset Rollers rotate? Does the Exit Gate Solenoid
actuate during the Quick Test?
6 MCU PWB REPLACEMENT
Replace the "Engine Board (MCU PWB)" on page 4-92
Does the error code appear?
7 The following printer 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 the steps in this Service Check, 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
• I/O PWB - Go to
4025-XXX
"I/O PWB" on page 4-89.
Yes No
Go to step 2 Go to step 3
Go to step 3 Replace the
"Face Up
Exit Sensor"
on page 4-77
Go to step 4 Go to step 5
Go to step 5 Replace the
"Fuser
Assembly"
on page 4-65
Go to step 6 Replace the
"Offset/Exit
Assembly"
on page 4-69
Go to step 7 Problem
solved
Diagnostic Information
2-37