Lexmark X651de Service Manual page 185

Step
6
Perform a print test and check the redrive motor assembly
for proper operation.
Does the above component operate properly?
7 Perform a print test and check the duplex drive motor
assembly for proper operation.
Does the above component operate properly?
8
Check the sensor (duplex input) for proper operation.
1. Enter the diagnostic mode
2. Select Duplex tests
3. Select sensor test
4. 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.
9 Check the above sensor for proper connection.
Is the above sensor connected properly?
10 Perform a print test and check the duplex drive motor
assembly for proper operation.
Does the above component operate properly?
11 Check the external duplex media path for obstructions.
Is the above component free from obstructions?
12 Check the external duplex unit assembly for proper
installation.
Is the above component properly installed?
Check Yes
Go to step 7. Replace the
redrive motor
assembly.
Go to
motor assembly
removal (X654,
X656, and X658)"
on page
Go to step 8 Replace the
duplex drive motor
assembly.
Go to
drive motor
assembly
removal (X654,
X656, and X658)"
on page
Go to step 10. Go to step 9.
Replace the Replace the
Sensor (duplex connection.
input).
"Sensor
Go to
(duplex input)
removal (X654,
X656, and X658)"
on page 4-42.
Go to step 14. Replace the
duplex drive motor
assembly.
Go to
drive motor
assembly
removal (X654,
X656, and X658)"
on page
Go to step 12 Remove
obstructions.
Go to step 13. Remove then
properly re-install
the external
duplex unit
assembly.
Diagnostic information
7462
No
"Redrive
4-39.
"Duplex
4-9.
"Duplex
4-9.
2-149