Lexmark W820 Service Manual page 142

Step Actions and Questions
2 TRAY 2 TAKE AWAY SENSOR TEST
Enter Diagnostic Mode, Base Sensor Test
Open the Left Upper Cover. Insert and then remove, a sheet of
paper into the Tray 2 Take Away Sensor.
Does the Operator Panel LCD change between OP and CL
as you insert then remove the paper?
3 MCU PWB REPLACEMENT
Replace the
Does the error code appear?
4 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 listed below, one at a time, until
you isolate and solve the problem.
• Wiring and connectors linking the FRUs
• I/O PWB - Go to
Attendance Message 273
There is a paper jam between the MP Feeder and Tray 2 Take Away
Sensor.
Logic Control on the MCU PWB sensed that when paper was fed from the MP Feeder,
Tray 2 Take Away Sensor did not actuate within the specified time after the MP Feeder
Feed Clutch was actuated.
Step Actions and Questions
1 PAPER INSPECTION
Inspect the paper loaded in the MP Feeder.
Is the paper loaded in the MP Feeder 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 MP FEEDER PAPER FEED TEST
Enter Diagnostic Mode - Input Tray Test, MP Feeder.
Did the MP Feeder tray feed paper?
2-46
Service Manual
"Engine Board (MCU PWB)" on page
"I/O PWB" on page
4025-XXX
4-92.
4-89.
Yes No
Go to step 3 Replace the
"Tray 2 Take
Away
Sensor" on
page 4-50
Go to step 4 Problem
solved
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
"MP Feeder
Assembly"
on page 4-40