Lexmark W820 Service Manual page 125

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 TRAY 3 TAKE AWAY SENSOR TEST
Enter Diagnostic Mode, Base Sensors - Tray 3 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 TRAY 4 TAKE AWAY SENSOR TEST
Enter Diagnostic Mode, Base Sensors - Tray 4 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?
6 TRAY 5 TAKE AWAY ROLL CHECK
1. Enter Diagnostic Mode - Input Tray Test.
2. Select Tray 5, Single
Does the Take Away rotate when the HCF Motor runs?
7 HCF PWB REPLACEMENT
Replace the "HCF PWB" on page
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?
10 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, one at a time, until you isolate
and solve the problem.
•
Wiring and connectors linking the FRUs
4025 Options
4-66. Does the error code
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 3 Take
Away
Sensor" on
page 4-78
Go to step 6 Replace the
"Tray 4 Take
Away
Sensor" on
page 4-88
Go to step 7 Troubleshoot
the drive
transmission,
from the HCF
Motor to the
Tray 5 Take
Away Gear
Go to step 8 Problem
solved
Go to step 9 Problem
solved
Go to step 10 Problem
solved
Diagnostic Information
2-43