Duplex Control Jam Service Check - Lexmark MX71x Service Manual

Action
Step 3
Check the sensor (duplex path) for proper operation.
a
Enter the diagnostic mode.
b
Select duplex tests.
c
Select sensor test.
d
Observe the line item sensor.
Does the display on the control panel change every time the sensing area
of the sensor is interrupted or blocked?
Step 4
Check the sensor (duplex path) for proper connection.
Is the sensor connected properly?
Step 5
Check the upper redrive for damage.
Is the component free from damage?
Step 6
Perform a print test and check the upper redrive motor for proper
operation.
Does the component operate properly?
Step 7
Perform a print test.
Does the problem remain?

Duplex control jam service check

Action
Step 1
Check the duplex path for media jams and obstructions.
Is the duplex path free from media jams and obstructions?
Step 2
Ensure the duplex motor cable and the socket "DUPLEX MTR" on the
controller board is properly connected.
Is the above cable properly connected?
Yes
Go to step 5.
Replace the sensor
(duplex path) See
"Sensor (duplex path)
removal" on page
542.
Go to step 6.
Go to step 7.
Contact the next level
of technical support.
Yes
Go to step 2.
Go to step 3.
Diagnostic information
108
7463
No
Go to step 4.
Reseat the connection
Replace the upper
redrive. See "Upper
redrive removal" on
page 571.
Replace the upper
redrive motor. See
"Upper redrive motor
removal" on page
569.
The problem is solved.
No
Remove media jams
and obstructions.
Reseat the connection.