Registration Sensor - Lexmark W820 Service Manual

Error Code 255
There is a paper jam between the Envelope Feeder and the

Registration Sensor.

Logic Control on the MCU PWB sensed that the Registration Sensor did not actuate
within the specified time after the Envelope Feed Clutch was actuated.
Step Actions and Questions
1 PAPER PATH INSPECTION
Inspect the paper path for paper scraps that may cause a
paper jam.
Is the paper path free of paper scraps?
2 PAPER INSPECTION
Inspect the envelopes that are loaded in the Envelope Tray.
Are the envelopes that are loaded in the Envelope Tray
wrinkled or damaged?
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 SENSOR TEST
1. Enter Diagnostic Mode.
2. Insert, then remove, a sheet of paper into the Tray 2 Take Away
Sensor.
Does the Control Panel LCD change between OP and CL
as you insert then remove the paper?
5 +24VDC CHECK
Measure the voltage between P/J700-7 and P/J700-12 on the
Envelope PWB.
Is there +24VDC between P/J700-7 and P/J700-12?
2-6
Service Manual
4025 Options
Yes No
Go to step 2 Clean the
paper path
Replace the Go to step 3
envelopes
with new
envelopes
Go to step 4 Replace the
Envelope
Feeder Option
Go to step 5 Replace the
Tray 2 Take
Away Sensor.
Go to the
Printer
Service
Manual for the
Removal and
Replacement
Procedure.
Go to step 6 Use the Block
Diagrams in
the printer
service
Manual to
troubleshoot a
loss of
+24VDC from
the MCU
PWB