Lexmark W820 Service Manual page 131

Step Actions and Questions
9 PAPER TRAVEL INSPECTION
Open the Left Upper Cover, and observe the position of the
jammed paper.
Did the sheet of paper stop while exiting the Fuser?
10 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?
11 PAPER TRAVEL INSPECTION
Remove the Fuser Full Cover and observe the position of the
jammed paper.
Did the sheet of paper stop in the Offset Unit?
12 OFFSET UNIT INSPECTION
Check the Offset Unit for lodged scraps of paper or damage.
Is the Offset Unit clean and undamaged?
13 FUSER EXIT SENSOR TEST
Enter Diagnostic Mode and select the Fuser Exit Sensor.
Does the Operator Panel LCD change between OP and CL
as you insert then remove the paper?
14 MCU PWB REPLACEMENT
Replace the "Engine Board (MCU PWB)" on page 4-92
Does the error code appear?
15 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 10 Go to step 11
Go to step 11 Replace the
"Fuser
Assembly"
on page 4-65
Go to step 12 Go to step 13
Go to step 13 Clean or
replace the
"Offset/Exit
Assembly"
on page 4-69
Go to step 14 Replace the
"Face Up
Exit Sensor"
on page 4-77
Go to step 15 Problem
solved
Diagnostic Information
2-35