Lexmark MS911 Service Manual page 120

Action
Step 6
a
Test the sensor.
Enter the Diagnostics menu, and then navigate to:
SENSOR TESTS > Staple and Hole Punch Finisher Sensor Tests >
Tamper home, front
b
Move the tamper to the sensor.
Does the sensor status change while toggling the sensor?
Step 7
Replace the sensor. See "Sensor (SHPF front tamper home) removal " on
page 355.
Does the problem remain?
Step 8
a
Remove the SHPF compiler assembly, and then separate the front
tamper section.
b
Make sure that the tamper belts and gears are properly installed.
c
Make sure that the spring is attached to the belt.
d
Check the belts and gears for wear or damage, and replace if
necessary. See "SHPF—Compiler section 3" on page
Does the problem remain?
Step 9
a
Reseat the cables J4 and J5 on the SHPF controller board.
b
If applicable, reseat the junction connectors on the cables.
c
Make sure that the cables do not block the path of moving parts.
d
Check the cables for damage, and replace if necessary.
Does the problem remain?
Step 10
a
Reseat the interface cable on the SHPF controller board and printer
controller board.
b
Reseat the junction connector on the cable.
c
Check the cable for damage, and replace if necessary.
Does the problem remain?
Step 11
a
Reseat all the cables on the SHPF controller board.
b
Reset the printer.
Does the problem remain?
Yes
Go to step 8.
Go to step 8.
Go to step 9.
599.
Go to step 10.
Go to step 11.
Go to step 12.
Diagnostic information
120
4021, 7421
No
Go to step 7.
The problem is solved.
The problem is solved.
The problem is solved.
The problem is solved.
The problem is solved.