Lexmark W820 Service Manual page 135

Step Actions and Questions
2 FACE UP EXIT SENSOR TEST
Enter Diagnostic Mode and select Face Up Exit Sensor.
Insert and then remove, a sheet of paper into the Face Up Exit
Sensor
Does the Operator Panel LCD change between OP and CL
as you insert then remove the paper?
3 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?
4 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
Attendance Message 208
There is a paper jam at the Face Up Exit Switch.
Logic Control on the MCU PWB sensed that during Duplex Mode the Face Up Exit
Sensor did not deactuate within the specified time after the Sensor 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 Face Up Exit Sensor?
2 FACE UP EXIT SENSOR TEST
Enter Diagnostic Mode and select Face Up Exit Sensor.
Insert and then remove, a sheet of paper into the Face Up Exit
Sensor
Does the Operator Panel LCD change between OP and CL
as you insert then remove the paper?
4025-XXX
"I/O PWB" on page 4-89.
Yes No
Replace the Replace the
"Engine "Face Up
Board (MCU Exit Sensor"
PWB)" on on page 4-77
page 4-92
Go to step 4 Replace the
"Offset/Exit
Assembly"
on page 4-69
Yes No
Go to step 3 Go to step 2
Replace the Replace the
"Engine "Face Up
Board (MCU Exit Sensor"
PWB)" on on page 4-77
page 4-92
Diagnostic Information
2-39