Sensor (Stapler Carriage Hp) Off Failure - Lexmark W850n Manual

4024-110
Step Check
4 Check the stapler carriage motor assembly by opening
the finisher front door assembly then pushing the
stapler carriage towards the back. Then closing the
finisher front door assembly, the stapler carriage
should move.
Does the stapler carriage motor assembly rotate
normally?
5 Is the stapler carriage motor assembly connected
properly?
6 Perform a test print stapled document.
Does the error still occur?

990.01 Sensor (stapler carriage HP) off failure

Step Check
1 Check the stapler by moving it with your fingers.
Does the Stapler carriage move smoothly?
2 Check the sensor (stapler carriage HP) for correct
operation.
Perform the sensor (stapler carriage HP) test.
1. Enter Diagnostics mode.
2. Select FINISHER TESTS.
3. Select Sensor Tests.
4. Select Punch and Staple.
5. Select Stapler carriage shift HP.
Does the display on the operator panel change every
time the sensing area of the sensor (stapler carriage
HP) is placed to the interrupt flag of the stapler rack
gear by moving the stapler carriage by hand?
3 Is the sensor (stapler carriage HP) connected
properly?
4 Check the stapler carriage motor assembly by opening
the finisher front door assembly then pushing the
stapler carriage towards the back. Then closing the
finisher front door assembly, the stapler carriage
should move.
Does the stapler carriage motor assembly rotate
normally?
5 Is the stapler carriage motor assembly connected
properly?
2-86
Finisher Service Manual
Yes No
Go to step 6. Go to step 5.
Replace the Replace the
stapler carriage connection
motor assembly.
Replace the Problem solved.
printer engine
card assembly.
Refer to the
Printer Service
Manual.
Yes No
Go to step 2. Remove
obstructions.
Go to step 4. Go to step 3.
Replace the Replace the
sensor (stapler connection.
carriage HP). Go
to "Sensor
(stapler carriage
HP) removal" on
page 4-58.
Go to step 6. Go to step 5.
Replace the Replace the
stapler carriage connection.
motor assembly.