Lexmark W820 Service Manual page 117

Step Actions and Questions
11 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 246
There is a paper jam between Paper Tray 3 and the Registration Sensor.
Logic Control on the MCU PWB sensed that when paper was fed from Tray 3, the
Registration Sensor did not actuate within the specified time after the Tray 2 Take Away
Sensor actuated.
Step Actions and Questions
1 PAPER INSPECTION
Inspect the paper that is loaded in the paper cassette.
Is the paper loaded in the cassette wrinkled or damaged?
2 PAPER PATH INSPECTION
Inspect the paper path for paper scraps or foreign objects that
could cause a paper jam.
Is the paper path clear?
3 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?
4 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 Main Motor runs?
4025 Options
Yes No
Yes No
Replace the Go to step 2
paper with
new paper
Go to step 3 Clear the
paper path
Go to step 4 Replace the
Registration
Sensor. Go to
the printer
service
manual for the
Removal and
Replacement
Procedure.
Go to step 5 Replace Tray
2 Feeder. Go
to the printer
service
manual for the
Removal and
Replacement
Procedure.
Diagnostic Information
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