Lexmark W840 Finisher Service Manual page 111

Step Check
2 Check the sensor (stacker bin level 1) for correct
operation.
Perform the Stacker bin level1 test.
1. Enter Diagnostics mode.
2. Select FINISHER TESTS.
3. Select Sensor Tests.
4. Select Bin Level.
5. Select Stacker bin level1.
Does the display on the operator panel change every
time the sensing area of the sensor (stacker bin level 1)
is blocked by a multi page document or your finger?
3 Is the sensor (stacker bin level 1) installed correctly?
4 Check the sensor (stacker bin level 2) for correct
operation.
Perform the Stacker bin level2 test.
1. Select Diagnostics mode.
2. Select FINISHER TESTS,.
3. Select Sensor Tests.
4. Select Bin Level.
5. Select Stacker bin level2.
Does the display on the operator panel change every
time the sensing area of the sensor (stacker bin level
rear) is blocked by blocked by a multi page document
or your finger?
5 Is the sensor (stacker bin level 2) connected properly?
6 Check the encoder of the sensor (stacker bin level
encoder) installation.
Is the encoder installed correctly?
Does it enter the detection point of the sensor (stacker
bin level encoder)?
Yes No
Go to step 4. Go to step 3.
Replace the Replace the
sensor (stacker connection.
bin level 1). See
"Sensor
(stacker bin
level 1)
removal" on
page 4-34.
Go to step 5. Go to step 6.
Replace the Replace the
sensor (stacker connection.
bin level 2). See
"Sensor
(stacker bin
level 2)
removal" on
page 4-34.
Go to step 7. After reinstalling,
go to step 7.
Diagnostic information
4024-XXX
2-89