Lexmark W820 Service Manual page 121

Step Actions and Questions
6 TRAY 2 TAKE AWAY SENSOR TEST
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?
7 HCF PWB REPLACEMENT
Replace the "HCF PWB" on page
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?
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
Error Code 250
There is a paper jam between Paper Tray 4 and the Registration Sensor.
Logic Control on the MCU PWB sensed that when paper was fed from Tray 4, the
Registration Sensor did not actuate within the specified time after the Tray 2 Take Away
Sensor was actuated.
Step Actions and Questions
1 Are all the feed rolls correctly installed? Go to
Nudger, Feeder, and Retard Rolls" on page
Feed, Nudger, and Retard Rolls" on page
Feed, Nudger, and Retard Rolls" on page
4025 Options
4-66.
"Tray 3
4-84, "Tray 4
4-96, and "Tray 5
4-104.
Yes No
Go to step 7 Replace the
Tray 2 Take
Away Sensor.
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
Yes No
Go to step 2 Install
correctly or
replace as
necessary
Diagnostic Information
2-39