Lexmark W850 - Sensor (Punch Unit HP) on Failure

2-72 Finisher Service Manual
4024-XXX
984.00 Sensor (punch unit HP) on failure
2 Check the sensor (rear tamper HP) for correct
operation.
Perform the sensor (rear tamper HP) test.
1. Enter Diagnostics mode.
2. Select FINISHER TESTS.
3. Select Sensor Tests.
4. Select Media path2.
5. Select Rear tamper HP.
Does the display on the operator panel change every
time the sensing area of the sensor (rear tamper HP) is
blocked?
Go to step 4. Go to step 3.
3 Is the sensor (rear tamper HP) connected properly? Replace the
sensor (rear
tamper HP). Go
to “Sensor
(front tamper
HP) and sensor
(rear tamper HP)
removals” on
page 4-72.
Replace the
connection.
4 Check the rear tamper drive motor by opening the
finisher front door assembly and then closing it.
Does the rear tamper drive motor rotate, and does the
tamper move back and forth?
Go to step 6. Go to step 5.
5 Check the compiler unit cable assembly connection.
Are the connections of the compiler unit cable
assembly correctly connected?
Replace the
media compiler
unit assembly. Go
to “Media
compiler unit
assembly
removal” on
page 4-69.
Replace the
connection.
6 Perform a test print.
Does the error still occur?
Replace the
finisher controller
card assembly.
Go to “Finisher
controller card
assembly
removal” on
page 4-118.
Problem solved.
Step Check Yes No
1 Check the punch unit by moving it with your fingers.
Does the punch unit move smoothly?
Go to step 2. Remove
obstacles.
Step Check Yes No