Stacker Lower Safety Failure - Lexmark w850 Service Manual

Step Check
7 Check the sensor (stacker bin level encoder) for correct
operation.
Perform the sensor (stacker bin level encoder) test.
1. Enter Diagnostics mode.
2. Select FINISHER TESTS.
3. Select Sensor Tests.
4. Select Bin Level.
5. Select Stacker level encod.
Does the operator panel display change when the belt
of the stacker bin lift motor assembly is moved by
hand?
8 Is the sensor (stacker bin level encoder) connected
properly?
9 Check the stacker bin lift motor assembly for correct
operation.
Check the above motor by blocking the lower hole in
either of the sensors (stacker bin level). The stacker bin
should lower slightly.
Does the stacker bin lift motor assembly rotate
normally?
10 Is the stacker bin lift motor assembly connected
properly?
11 Perform a test print.
Does the error still occur?

Stacker lower safety failure

Step Check
1 Check the vertical transport mechanism of the stacker
bin for obstructions and deformation.
Are there any obstructions in the vertical transport
mechanism of the stacker bin?
2 Is there any deformation in the vertical transport
mechanism of the stacker bin?
Yes No
Go to step 9. Go to step 8.
Replace the Replace the
sensor (stacker connection.
bin level
encoder). Go to
"Sensor
(stacker bin
level encoder)
removal" on
page 4-35.
Go to step 11. Go to step 10.
Replace the Replace the
stacker bin lift connection.
motor assembly.
Go to "Stacker
bin lift motor
assembly
removal" on
page 4-38.
Replace the Problem solved.
finisher controller
card assembly.
Go to "Finisher
controller card
assembly
removal" on
page 4-118.
Yes No
Remove Go to step 2.
obstructions.
Replace Go to step 3.
deformed part.
Diagnostic information
4024-XXX
2-97