Stapler Unit Failure; Sensor (Stapler Carriage Hp) On Failure - Lexmark W850n Manual

989.00 Stapler unit failure

Step Check
1 Check the stapler unit assembly for correct operation.
Perform the staple test.
1. Enter Diagnostics mode.
2. Select FINISHER TESTS.
3. Select Staple Test.
Does the motor in the stapler unit assembly rotate
normally and staple the media?
2 Is the stapler unit assembly connected properly?
3 Perform a test print stapled document.
Does the error still occur?

990.00 Sensor (stapler carriage HP) on 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?
Yes No
Check for staples Go to step 2.
and staple jam.
Problem
resolved.
Replace the Replace the
stapler unit connection.
assembly. Go to
"Stapler unit
assembly
removal" on
page 4-56.
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.
Diagnostic information
4024-110
2-85