Lexmark W820 Service Manual page 137

Step Actions and Questions
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 REVERSE CLUTCH TEST
Enter Diagnostic Mode and select Duplex Quick Test.
Just before the paper is released from the exit rollers, the
paper should stop and reverse feed into the duplex unit.
Does the Reverse Clutch actuate to pull the paper back
into the duplex unit?
5 DUPLEX PWB REPLACEMENT
Replace the Duplex PWB. Go to the Options Service Manual
for the Removal Procedure.
Does the error code appear?
6 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 210
There is a paper jam at the Face Up Exit Sensor.
Logic Control on the MCU PWB sensed the Face Up Exit Sensor was on while the printer
was in standby.
Step Actions and Questions
1 FACE UP EXIT SENSOR INSPECTION
Remove the Fuser Full Cover.
Inspect the Face Up Exit Sensor for paper scraps that may be
actuating the sensor.
Is the Face Up Exit Sensor actuator free of paper scraps?
2 FACE UP EXIT SENSOR INSPECTION
Inspect the Face Up Exit Sensor for damage.
Is the sensor undamaged?
4025-XXX
"I/O PWB" on page 4-89.
Yes No
Go to step 4 Replace the
"Offset/Exit
Assembly"
on page 4-69
Go to step 5 Replace
the"Inverter
Clutches" on
page 4-74.
Go to step 6 Problem
solved
Yes No
Go to step 2 Clear paper
from the
Sensor
Go to step 3 Replace the
"Face Up
Exit Sensor"
on page 4-77
Diagnostic Information
2-41