Lexmark X 850 Owners Manual

Diagnostic information2-103
7500-XXX
290.15 Sensor (ADF registration) off jam (inverting)
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...

2-104MFP Service Manual 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...

Diagnostic information2-105
7500-XXX
10 Check the inverter solenoid assembly for operation. 
Perform the inverter solenoid test.
Open the ADF left cover assembly.
Remove the ADF front cover assembly. Go to “ADF front 
cover assembly removal” on page 4-166.
Close the ADF left cover assembly.
1. Enter the Diagnostics Menu.
2. Touch MOTOR TESTS.
3. Touch Scanner Motor Tests.
4. Touch Inverter solenoid.
Does the inverter solenoid assembly operate properly?Go to step 12. Go to step 11.
11 Check the inverter...

2-106MFP Service Manual 7500-XXX
290.21 Sensor (ADF width APS 1) static jam
15 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 No
1 Check the sensor (ADF width APS 1).
Is the feed media path free of media or media fragments?Go to step 2. Remove any 
media or media 
fragments.
2 Check the sensor (ADF width APS 1) for operation. 
Perform the sensor (ADF...

Diagnostic information2-107
7500-XXX
290.22 Sensor (ADF width APS 2) static jam
290.23 Sensor (ADF width APS 3) static jam
Step Check Yes No
1 Check the sensor (ADF width APS 2).
Is the feed media path free of media or media fragments?Go to step 2. Remove any 
media or media 
fragments.
2 Check the sensor (ADF width APS 2) for operation. 
Perform the sensor (ADF width APS 2) test.
Open the ADF left cover assembly.
1. Enter the Diagnostics Menu.
2. Touch SCANNER TESTS.
3. Touch Sensor Tests.
4. Touch ADF...

2-108MFP Service Manual 7500-XXX
291.00 Sensor (ADF registration) static jam
2 Check the sensor (ADF width APS 3) for operation. 
Perform the sensor (ADF width APS 3) test.
Open the ADF left cover assembly.
1. Enter the Diagnostics Menu.
2. Touch SCANNER TESTS.
3. Touch Sensor Tests.
4. Touch ADF width APS 3.
Operate the actuator of the sensor (ADF width APS 3).
Does the display on the operator panel change every time 
the sensing area of the above sensor is blocked?Go to step 4. Go to step 3.
3 Check...

Diagnostic information2-109
7500-XXX
291.01 Sensor (ADF inverter) off jam (inverting)
2 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...

2-110MFP Service Manual 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 such as...

Diagnostic information2-111
7500-XXX
291.02 Sensor (ADF inverter) on jam 2
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 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 9.
9 Place an...

2-112MFP Service Manual 7500-XXX
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 4-195.
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...