Lexmark W820 Service Manual page 122

Step Actions and Questions
2 PAPER INSPECTION
Inspect the paper that is loaded in the paper cassette.
Is the paper loaded in the cassette wrinkled or damaged?
3 PAPER PATH INSPECTION
Inspect the paper path for paper scraps or foreign objects that
could cause a paper jam.
Is the paper path clear?
4 Enter Diagnostic Mode, Base Sensors - Tray 2 Take Away
Sensor.
Insert, then remove, a sheet of paper into the Sensor.
Does the Control Panel LCD change between OP and CL
as you insert then remove the paper?
5 REGISTRATION SENSOR TEST
Enter Diagnostic Mode and select Sensor Test- Registration
Sensor.
Open the Left Upper Cover and insert, then remove, a sheet of
paper into the Registration Sensor.
Does the Control Panel LCD change between OP and CL
as you insert then remove the paper?
6 TRAY 2 TAKE AWAY ROLL CHECK
1. Enter Diagnostic Mode - Input Tray Test
2. Select Tray 2, Single
Does the Take Away rotate when the HCF Motor runs?
7 HCF PWB REPLACEMENT
Replace the
Does the error code appear?
8 I/O PWB REPLACEMENT
Replace the I/O PWB.
Does the error code appear?
9 MCU PWB REPLACEMENT
Replace the printer Engine Board (MCU PWB). Go to the
printer service manual for the Removal and Replacement
Procedure.
Does the error code appear?
2-40
Service Manual
"HCF PWB" on page 4-66.
4025 Options
Yes No
Replace the Go to step 3
paper with
new paper
Go to step 4 Clear the
paper path
Go to step 5 Replace the
Tray 2 Take
Away Sensor.
Go to the
printer service
manual for the
Removal and
Replacement
Procedure.
Go to step 6 Replace the
Registration
Sensor.
Go to step 7 Replace Tray
2 Feeder. Go
to the printer
service
manual for the
Removal and
Replacement
Procedure.
Go to step 8 Problem
solved
Go to step 9 Problem
solved
Go to step 10 Problem
solved