Lexmark X850e Service Manual page 191

Step Check
8 Check the sensor (stacker bin level encoder) for proper
operation.
Perform the sensor (stacker bin level encoder) test.
Remove the rear upper cover. Go to
cover removal" on page
1. Enter the Diagnostics Menu.
2. Touch FINISHER TESTS.
3. Touch Sensor Test.
4. Touch Bin Level.
5. Touch Stacker bin level encod.
Does the operator panel display change when the belt
of the stacker bin lift motor assembly is moved by
hand?
9 Is the sensor (stacker bin level encoder) connected
properly?
10 Check the stacker bin lift motor assembly.
Perform the stacker bin lift motor test.
1. Enter the Diagnostics Menu.
2. Touch MOTOR TESTS.
3. Touch Finisher tests.
4. Touch Stacker lift mtr.
5. Touch Forward or Reverse.
Does the stacker bin lift motor assembly operate
properly?
11 Check the stacker bin lift motor assembly connection.
Is the connector of the stacker bin lift motor assembly
properly connected to the finisher controller card
assembly?
12 Perform a print test.
Does the error still occur?
"Rear upper
4-101.
Yes No
Go to step 10. Go to step 9.
Replace the Replace the
sensor (stacker connection.
bin level
encoder).
Go to "Sensor
(stacker bin
level encoder)
removal" on
page 4-112.
Go to step 12. Go to step 11.
Replace the Replace the
stacker bin lift connection.
motor assembly.
Go to "Stacker
bin lift motor
assembly
removal" on
page 4-115.
Replace the Problem solved.
finisher controller
card assembly.
Go to "Finisher
controller card
assembly
removal" on
page 4-195.
Diagnostic information
7500-XXX
2-123