Lexmark X850e Service Manual page 199

Step
2 Check the ADF rolls for wear.
Is the ADF feed/pick roll assembly or the ADF separation
roll guide assembly free of excess wear?
3 Check the media path for contaminates.
Is the media path free of excess media dust and foreign
objects such as paper clips and staples?
4 Check the sensor (ADF inverter) for operation.
Perform the sensor (ADF inverter) test.
Open the ADF left cover assembly.
Remove the ADF separation roll guide assembly. Go to
"ADF separation roll guide assembly" on page
1. Enter the Diagnostics Menu.
2. Touch SCANNER TESTS.
3. Touch Sensor Tests.
4. Touch ADF inverter.
Insert a sheet of paper into the ADF paper path entrance.
Manually rotate the ADF exit roll assembly by hand to feed
the sheet through the ADF to operate the actuator of the
sensor (ADF inverter).
Does the display on the operator panel change every time
the sensing area of the above sensor is blocked?
5 Check the sensor (ADF inverter) for connection.
Is the above sensor connected properly?
6 Check the registration motor (forward or reverse) test.
Perform the registration motor test.
Open the ADF left cover assembly.
Remove the ADF rear cover. Go to
removal" on page
1. Enter the Diagnostics Menu.
2. Touch MOTOR TESTS.
3. Touch Scanner Motor Tests.
4. Touch ADF registration drv mtr
5. Touch Forward or reverse.
Does the ADF registration motor operate properly?
Check
"ADF rear cover
4-165.
Yes
Go to step 3.
Go to step 4.
Go to step 5.
4-195.
Replace the
sensor (ADF
inverter).
Go to "Sensor
(ADF inverter)"
on page 4-189.
Go to step 8.
Diagnostic information
7500-XXX
No
Clean or replace
the ADF feed/pick
roll assembly or
the ADF
separation roll
guide assembly.
Go to "ADF feed/
pick roll
assembly
removal" on
page 4-178 or
"ADF separation
roll guide
assembly" on
page 4-195.
Remove all
contaminates from
the media path.
Go to FIP2.9.
Replace the
connection.
Go to step 7.
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