Lexmark MS71 Series, Service Manual

Page: 76 / 645

Sensor (input) never-arriving jam (exiting duplex) service check
Action Yes No
Step 1
Check the duplex path for media jams and obstructions.
Is the duplex path free from media jams and obstructions?
Go to step 2. Remove media jams
and obstructions.
Step 2
Check the sensor (input) for proper operation.
a
Enter the diagnostic mode.
b
Select Base sensor test.
c
Observe the line item input.
Does the display on the operator panel change every time the sensing
area of the above sensor is interrupted or blocked?
Go to step 4. Go to step 3.
Step 3
Check the above sensor for proper connection.
Is the above sensor connected properly?
Replace the sensor
(input). See “Sensor
(input) removal” on
page 305 .
Replace the
connection.
Step 4
Ensure the duplex motor cable and the socket "DUPLEX MTR” on the
controller board is properly connected.
Is the above cable properly connected?
Go to step 5. Reseat the connection.
Step 5
Perform a print test.
Does the problem remain?
Replace the duplex
motor. See “Duplex
motor removal” on
page 314 .
Problem solved.
Step 6
Perform a print test.
Does the problem remain?
Contact the next
highest level of
technical support.
Problem solved.
235–239 paper jams
1
Lift the tray slightly, and then pull it out completely.
4063
Diagnostic information
76