Lexmark W820 Service Manual page 128

Step Actions and Questions
5 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?
6 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 258
There is problem with the Tray 4 Take Away Sensor.
Logic Control on the MCU PWB sensed the Tray 4 Take Away Sensor was on while the
printer was in standby.
Step Actions and Questions
1 TRAY 4 TAKE AWAY SENSOR INSPECTION
Open the HCF Left Cover and inspect the Tray 4 Take Away
Sensor for paper scraps that may be actuating the sensor.
Is the Sensor free of paper scraps?
2 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?
3 HCF PWB REPLACEMENT
Replace the
Does the error code appear?
4 I/O PWB REPLACEMENT
Replace the I/O PWB.
Does the error code appear?
5 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?
2-46
Service Manual
"HCF PWB" on page 4-66.
4025 Options
Yes No
Go to step 6 Problem
solved
Yes No
Go to step 2 Remove the
paper scraps
Go to step 3 Replace the
"Tray 4 Take
Away
Sensor" on
page 4-88
Go to step 4 Problem
solved
Go to step 5 Problem
solved
Go to step 6 Problem
solved