Lexmark X 850 Owners Manual

Diagnostic information2-93
7500-XXX
6 Check the sensor (ADF pre registration) for operation.
Perform the sensor (ADF pre registration) test.
Open the ADF left cover assembly.
1. Enter the Diagnostics Menu.
2. Touch SCANNER TESTS.
3. Touch Sensor Tests.
4. Touch ADF pre registration.
Operate the actuator of the sensor (ADF pre registration).
Does the display on the operator panel change every time 
the sensing area of the above sensor is blocked?Go to step 8. Go to step 7.
7 Check the sensor (ADF...

2-94MFP Service Manual 7500-XXX
290.10 Sensor (ADF pre-registration) static jam
11 Check the ADF registration motor for connection.
Is the above motor connected properly?Replace the ADF 
registration 
motor. 
Go to “ADF 
registration 
motor removal” 
on page 4-201.Replace the 
connection.
12 Place an undamaged document in the ADF, and perform a 
ADF test.
Does the error remain?Replace the ADF 
controller card 
assembly. 
Go to “ADF 
controller card 
assembly 
removal” on 
page 4-167.Go to step 13.
13...

Diagnostic information2-95
7500-XXX
290.11 Sensor (ADF registration) on jam ADF simplex side 1
4 Place an undamaged document in the ADF, and perform a 
ADF test.
Does the error remain?Replace the 
ADF controller 
card assembly.
Go to “ADF 
controller card 
assembly 
removal” on 
page 4-167.Go to step 5.
5 Place an undamaged document in the ADF, and perform a 
ADF test.
Does the error remain?Replace the RIP 
card assembly. 
Go to “RIP card 
assembly 
removal” on 
page 4-128.Problem solved.
Step Check Yes...

2-96MFP Service Manual 7500-XXX
4 Check the sensor (ADF registration) for operation. 
Perform the sensor (ADF registration) test.
Open the ADF left cover assembly.
1. Enter the Diagnostics Menu.
2. Touch SCANNER TESTS.
3. Touch Sensor Tests.
4. Touch ADF registration.
Place a piece of white paper into the ADF media entrance 
and over the sensor (ADF registration). 
Does the display on the operator panel change every time the 
sensing area of the above sensor is blocked?Go to step 6. Go to step 5.
5 Check...

Diagnostic information2-97
7500-XXX
290.12 Sensor (ADF registration) on jam side 2
Step Check Yes No
1 Check the original document condition.
Is the original document free of paper clips and staples as 
well as damage such as creases, tears, holes or excessive 
wear?Go to step 2. Remove damaged 
original document 
and replace with a 
new undamaged 
original document. 
Perform a ADF 
test. If the problem 
remains, go to step 
2.
2 Check the ADF rolls for wear.
Is the ADF feed/pick roll assembly or the ADF...

2-98MFP Service Manual 7500-XXX
7 Check the feed drive motor for correct operation. 
Perform the feed drive motor test.
Open the ADF left cover assembly.
Remove the ADF rear cover. Go to “ADF rear cover 
removal” on page 4-165.
1. Enter the Diagnostics Menu.
2. Touch MOTOR TESTS.
3. Touch Scanner Motor Tests.
4. Touch ADF feed drv mtr.
Does the feed drive motor rotate properly?Go to step 9. Go to step 8.
8 Check the feed drive motor for connection.
Is the above sensor connected properly?Replace the 
ADF...

Diagnostic information2-99
7500-XXX
290.13 Sensor (ADF registration) off jam
Step Check Yes No
1 Check the original document condition.
Is the original document free of paper clips and staples as 
well as damage such as creases, tears, holes or excessive 
wear?Go to step 2. Remove damaged 
original document 
and replace with a 
new undamaged 
original document. 
Perform a ADF 
test. If the problem 
remains, go to step 
2.
2 Check the ADF rolls for wear.
Is the ADF feed/pick roll assembly or the ADF...

2-100MFP Service Manual 7500-XXX
290.14 Sensor (ADF inverter) on jam (Inverting))
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 “ADF rear cover 
removal” on page 4-165.
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?Go to step 8. Go to step...

Diagnostic information2-101
7500-XXX
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?Go to step 3. 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.
3 Check the media path for contaminates.
Is the media path free of excess media dust and foreign 
objects...

2-102MFP Service Manual 7500-XXX
7 Check the ADF registration motor for connection.
Is the above motor connected properly?Replace the ADF 
registration motor. 
Go to “ADF 
registration 
motor removal” 
on page 4-201.Replace the 
connection.
8 Check the sensor (ADF registration) for operation. 
Perform the sensor (ADF registration) test.
Open the ADF left cover assembly.
1. Enter the Diagnostics Menu.
2. Touch SCANNER TESTS.
3. Touch Sensor Tests.
4. Touch ADF registration.
Place a piece of white paper...