Lexmark X 850 Owners Manual

Diagnostic information2-53
7500-XXX
5Check the drive power transmission. 
Do the exit 2 media exit roll assembly and the other 
gears rotate smoothly?Go to step 6.Replace damaged 
components.
Go to “Exit 2 unit 
assembly removal” 
on page 4-315.
6Check the exit 2 drive motor for proper operation. 
1. Enter the Diagnostics Menu.
2. Touch MOTOR TESTS.
3. Touch Printer Motor Test.
4. Touch Exit2 drive mtr.
5. Touch Forward or reverse.
Does the above motor rotate normally?Go to step 8.Go to step 7.
7Check...

2-54MFP Service Manual 7500-XXX
230.01 Sensor (duplex wait) static jam
231.00 Sensor (registration) on jam (duplex paper feed)
StepCheckYe sNo
1Check the paper position.
Open the duplex left door assembly, and visually check 
it. 
Does the paper touch the duplex wait actuator?Remove the paper.Go to step 2.
2Check the sensor (duplex wait) for proper operation.
1. Enter the Diagnostics Menu.
2. Touch DUPLEX TESTS.
3. Touch Sensor Test.
4. Touch Duplex wait.
Open the duplex left door assembly.
Does the...

Diagnostic information2-55
7500-XXX
3Check the roll. 
Open the duplex left door assembly.
Is the duplex media transport roll assembly free of 
excess wear and contamination?Go to step 4.Clean or replace the 
duplex media 
transport roll 
assembly.
Go to “Duplex 
media transport 
rolls removal” on 
page 4-313.
4Check the drive power transmission. 
Open the duplex left door assembly. 
Do the duplex media transport roll assembly and the 
other gears rotate smoothly?Go to step 5.Replace damaged 
components....

2-56MFP Service Manual 7500-XXX
231.01 Sensor (registration) on jam (duplex paper feed)
14Perform a 2 sided print test.
Does the error still occur?Replace the printer 
engine card 
assembly.
Go to “Printer 
engine card 
assembly removal” 
on page 4-117.Problem solved.
StepCheckYe sNo
1Check the paper position.
Open the printer left door assembly, and visually check 
it. 
Does the paper touch the sensor (registration)?Remove the paper.Go to step 2.
2Check the paper position.
Open the duplex left door...

Diagnostic information2-57
7500-XXX
7Check the drive power transmission. 
Open the duplex left door assembly.
Do the duplex media center transport roll assembly and 
the other gears rotate smoothly?Go to step 8.Replace damaged 
components.
Go to “Duplex 
media center 
transport roll 
removal” on 
page 4-314.
8Check the sensor (duplex wait) for proper operation.
1. Enter the Diagnostics Menu.
2. Touch DUPLEX TESTS.
3. Touch Sensor Test.
4. Touch Duplex wait.
Open the duplex left door assembly.
Does the...

2-58MFP Service Manual 7500-XXX
241.00 Sensor (pre-feed) on jam (tray 1 feed)
Step Check Yes No
1Check the media condition. 
Is the media in the tray crumpled or damaged? Replace the 
damaged media 
with new.Go to step 2.
2
Check the media size setup. 
Does the media size, in use, match the size set for tray 1?Go to step 3. Replace the 
media, or change 
the media size 
setup. 
3
Check the rolls for tray 1.
Remove tray 1, check it over. 
Are the feed roll, separation roll, and pick roll free of excess...

Diagnostic information2-59
7500-XXX
241.01 Sensor (registration) on jam (tray 1 feed) 
9Check the media feed lift motor for proper operation of 
tray 1. 
Replace the media feed lift motor for tray 1 with one from 
tray 2. 
1. Enter the Diagnostics Menu.
2. Touch MOTOR TESTS.
3. Touch Printer Motor Test.
4. Touch Tray 1 feed mtr.
Does the motor rotate normally?Re-install the 
media feed lift 
motor for tray 2 as 
it previously was 
and replace the 
tray 1 motor with a 
new one.
Go to “Media feed 
lift...

2-60MFP Service Manual 7500-XXX
242.00 Sensor (pre-feed) on jam (tray 2 feed) 
5 Check the sensor (registration) for proper operation.
1. Enter the Diagnostics Menu.
2. Touch BASE SENSOR TEST.
3. Touch Media Path.
4. Touch Registration.
Open the printer left door assembly. 
Does the display on the operator panel change every time 
the sensor actuator operates?Go to step 7. Go to step 6. 
6 Check the sensor (registration) connection.
Is the sensor (registration) properly connected? Replace the 
sensor...

Diagnostic information2-61
7500-XXX
3 Check the rolls for tray 2. 
Remove tray 2 and check it. 
Are the feed roll, separation roll, and pick roll free of excess 
wear and contamination?Go to step 4. Clean or replace 
the feed roll, 
separation roll, 
and pick roll.
Go to “Feed roll 
removal” on 
page 4-45, 
“Separation roll 
removal” on 
page 4-49, and 
“Pick roll 
removal” on 
page 4-51.
4 Check the media position. 
Open the printer left lower door assembly, and visually 
check it. 
Does the media touch...

2-62MFP Service Manual 7500-XXX
242.01 Sensor (tray 2 feed-out) on jam (tray 2 feed)
9 Check the media feed lift motor in tray 2 for proper 
operation.
Replace the media feed lift motor for tray 2 with the one 
from tray 1. 
1. Enter the Diagnostics Menu.
2. Touch MOTOR TESTS.
3. Touch Printer Motor Test.
4. Touch Tray 2 feed mtr.
Does the media feed lift motor rotate normally?Install the media 
feed lift motor for 
tray 1 as it 
previously was 
and replace the 
motor for tray 2 
with a new motor.
Go to...