Lexmark W820 - Does the Error Code Appear; 3 MCU PWB REPLACEMENT Replace the Engine Board (MCU PWB) on Page; 4 The Following Printer Frus and Areas Are Associated with this; Have Failed Partially or Completely. if You Cannot Isolate this

Diagnostic Information 2-29
4025-XXX
Error Code 941
There is a Lift Up problem with Tray 1.
Logic Control on the MCU PWB sensed that Tray 1 was not raising into position in
Feeder 1.
Step Actions and Questions Yes No
1 TRAY 1 LIFT MOTOR QUICK TEST
Turn printer off. Pull paper drawer 1 out to drop paper table.
Push drawer closed. Turn printer on. The paper tray motor
should run.
Does Tray 1 lift motor run?
Go to step 2 Replace the
“Tray 1 Lift
Motor” on
page 4-13
2 TRAY 1 CHECK
Slowly slide Tray 1 out of Feeder 1.
Can you hear the Tray 1 bottom plate drop as you slide the
Tray out of the Feeder?
Go to step 3 Replace the
Tray 1 with a
new one
3 TRAY 1 NO PAPER SENSOR TEST
Enter Diagnostic Mode, Base Sensor Test to test Tray 1 No
Paper Sensor.
Remove Tray 1 from the printer and push the Actuator up and
then release it.
Does the Operator Panel LCD change between OP and CL
as you insert then remove the paper?
Go to step 4 Replace the
Tray 1 No
Paper Sensor.
Go to “Tray 1
& 2 No Paper
Sensors” on
page 4-31.
4 MCU PWB REPLACEMENT
Replace the “Engine Board (MCU PWB)” on page 4-92.
Does the error code appear?
Go to step 5 Problem
solved
5 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 “I/O PWB” on page 4-89.