Lexmark X 850 Owners Manual

							Diagnostic information2-83
7500-XXX
2Check the media size setup.
Does the media size in use match the size set for 
tray 4?Go to step 3.Replace the media 
or change the media 
size setup.
3Check the tray 4 rolls.
Pull out tray 4, and check it.
Are the feed roll, separation roll, and pick roll for 
transport free of excess wear and contamination?Go to step 4.Clean or replace the 
feed roll, separation 
roll, and pick roll.
Go to “2000-sheet 
dual input (TTM)–
feed roll removal” 
on page 4-259, 
“2000-sheet dual 
input (TTM)–
separation roll 
removal” on 
page 4-263, and 
“2000-sheet dual 
input (TTM)–pick 
roll removal” on 
page 4-266.
4Check the media position.
Does the media touch the sensor (pre-feed) of the tray 4 
media feed unit assembly?Remove the media.Go to step 5.
5Check the tray 4 sensor (pre-feed) for proper operation.
1. Enter the Diagnostics Menu.
2. Touch INPUT TRAY TESTS.
3. Touch Sensor Test.
4. Touch Tr a y  4 .  
5. Touch Pre-feed.
Remove the media tray assembly.
Does the display on the operator panel change every 
time a white piece of paper is placed over the sensing 
area of the above sensor?Go to step 7.Go to step 6.
6Check the tray 4 sensor (pre-feed) for proper 
connection.
Is the above sensor connected properly?Replace the sensor 
(pre-feed).
Go to “2000-sheet 
dual input (TTM)–
sensor (pre-feed) 
removal” on 
page 4-256.Replace the 
connection.
7Check the connection between the 2TM/TTM controller 
card assembly and the printer engine card assembly.
Are the above cards connected properly?Go to step 8.Replace the 
connection.
8Check the tray 4 media feed lift motor for proper 
operation.
1. Enter the Diagnostics Menu.
2. Touch MOTOR TESTS.
3. Touch Printer Motor Test.
4. Touch Tray 4 feed mtr.
Does the above motor rotate normally?Go to step 11.Go to step 9.
9Check the tray 4 media feed lift motor for proper 
connection.
Is the above motor connected properly?Go to step 10.Replace the 
connection.
StepCheckYe sNo 
						

							2-84MFP Service Manual 7500-XXX
244.05 Sensor (tray 4 feed-out) static jam 
10Check the tray 4 media feed lift motor for proper 
operation. 
Replace the media feed lift motor for tray 4 with that for 
tray 3. 
1. Enter the Diagnostics Menu.
2. Touch MOTOR TESTS.
3. Touch Printer Motor Test.
4. Touch Tray 4 feed mtr.
Does the above motor rotate normally?Reinstall the media 
feed lift motor for 
tray 3 as it 
previously was, and 
then replace the 
media feed lift motor 
for tray 4 with a new 
one.
Go to “2000-sheet 
dual input (TTM)–
media feed lift 
motor removal” on 
page 4-248.Replace the 2TM/
TTM controller card 
assembly.
Go to “2000-sheet 
dual input (TTM)–
2TM/TTM controller 
card assembly 
removal” on 
page 4-274.
11Perform a print test.
Does the error still occur?Replace the 2TM/
TTM controller card 
assembly. 
Go to “2000-sheet 
dual input (TTM)–
2TM/TTM controller 
card assembly 
removal” on 
page 4-274.
Go to step 12.Problem solved.
12Perform a 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 media position.
Open the 2TM/TTM left door assembly, and visually 
check it.
Does the media touch the sensor (tray 4 feed-out)?Remove the media.Go to step 2.
2Check the sensor (tray 4 feed-out) for proper operation.
1. Enter the Diagnostics Menu.
2. Touch INPUT TRAY TESTS.
3. Touch Sensor Test.
4. Touch Tr a y  4 .  
5. Touch Feed-out.
Open the 2TM/TTM left door assembly, and visually 
check it.
Does the display on the operator panel change every 
time the actuator on the above sensor operates?Go to step 4.Go to step 3.
StepCheckYe sNo 
						

							Diagnostic information2-85
7500-XXX
250.00 Sensor (registration) on jam (MPF pick) 
3Check the sensor (tray 4 feed-out) for proper 
connection.
Is the above sensor connected properly?Replace the sensor 
(tray 4 feed-out).
Go to “2000-sheet 
dual input (TTM)–
sensor (tray 4 feed-
out) removal” on 
page 4-241.Replace the 
connection.
4Perform a print test.
Does the error still occur?Replace the 2TM/
TTM controller card 
assembly. 
Go to “2000-sheet 
dual input (TTM)–
2TM/TTM controller 
card assembly 
removal” on 
page 4-274.
Go to step 5.Problem solved.
5Perform a 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.
Step Check Yes No
1 Check the media condition. 
Is the media in the MPF tray crumpled or damaged?Replace the media 
with new; ensure it 
is dry.Go to step 2.
2 Check the media size setup.
Does the media size in use match the size set for MPF tray?Go to step 3. Replace the media 
or change the 
media size setup.
3 Check the media position.
Open the printer left door assembly, and visually check it.
Does the media touch the sensor (registration)?Remove the 
media.Go to step 4.
4 Check the MPF media side guides for proper operation.
Do the MPF media side guides operate smoothly?Go to step 5. Adjust the MPF 
media side guides 
correctly.
5 Check the MPF for proper installation.
Remove the MPF feed unit assembly, and reinstall it.
Perform a print test.
Does an error occur during print test? Go to step 6. Problem solved.
StepCheckYe sNo 
						

							2-86MFP Service Manual 7500-XXX
6 Check the roll. 
Remove the MPF pick unit asm.
Is the MPF feed roll assembly free of excess wear and 
contamination?Go to step 7. Clean or replace 
the MPF feed roll 
assembly.
Go to “MPF feed 
unit assembly 
removal” on 
page 4-54.
7 Check the roll.
Remove the MPF feed unit assembly.
Is the MPF feed roll assembly free of excess wear and 
contamination?Go to step 8. Clean or replace 
the MPF feed roll 
assembly.
Go to “MPF feed 
unit assembly 
removal” on 
page 4-54.
8 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 and check it.
Does the display, on the operator panel, change every time 
the sensor actuator is operated? Go to step 10. Go to step 9.
9 Check the sensor (registration) connection.
Is the sensor (registration) properly connected?Replace the 
sensor 
(registration).
Go to “Sensor 
(registration) 
removal” on 
page 4-81.Replace the 
connection.
10 Check the MPF pick solenoid for proper operation.
1. Enter the Diagnostics Menu.
2. Touch MOTOR TESTS.
3. Touch Printer Motor Test.
4. Touch MPF pick solenoid.
Does the MPF pick solenoid make an audible clicking 
sound when activated?Go to step 12. Go to step 11.
11 Check the MPF pick solenoid connection.
Is the MPF pick solenoid properly connected?Replace the MPF 
pick solenoid. 
Go to “MPF pick 
solenoid / pick 
lever removal” 
on page 4-62.Replace the 
connection.
12 Perform a print test.
Does the error continue?Replace the 
printer engine card 
assembly.
Go to “Printer 
engine card 
assembly 
removal” on 
page 4-117.Problem solved. Step Check Yes No 
						

							Diagnostic information2-87
7500-XXX
290.00 Switch (sheet through) static jam
290.01 Sensor (sheet through) on jam
Step Check Yes No
1 Check the sensor (sheet through).
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 (sheet through) for operation. 
Perform the sensor (sheet through) 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 SCANNER TESTS.
3. Touch Sensor Tests.
4. Touch Sheet through.
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 the sensor (sheet through) for connection.
Is the above sensor connected properly?Replace the 
sensor (sheet 
through). 
Go to “Sensor 
(sheet through) 
removal” on 
page 4-200.Replace the 
connection.
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 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. 
						

							2-88MFP Service Manual 7500-XXX
2 Check the ADF rolls for wear.
Is the ADF feed/pick roll assembly or the ADF separation roll 
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 paper clips and staples?Go to step 4. Remove all 
contaminates 
from the media 
path.
4 Check the pick roll position motor assembly. 
Perform the pick roll position motor test.
Open ADF left cover assembly.
Override the switch (ADF left cover interlock).
1. Enter the Diagnostics Menu.
2. Touch MOTOR TESTS.
3. Touch Scanner Motor Tests.
4. Touch Pick roll position mtr.
Does the pick roll position motor assembly raise and lower 
properly?Go to step 6. Go to step 5.
5 Check the pick roll position motor assembly connection.
Is the above motor connected properly?Replace the pick 
roll position motor 
assembly.
Go to “Pick roll 
position motor 
assembly 
removal” on 
page 4-182.Replace the 
connection.
6 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 8. Go to step 7. Step Check Yes No 
						

							Diagnostic information2-89
7500-XXX
7 Check the feed drive motor connection.
Is the above motor connected properly?Replace the ADF 
feed drive motor 
assembly.
Go to “ADF feed 
drive motor 
assembly 
removal” on 
page 4-172.Replace the 
connection.
8 Check the sensor (sheet through) for operation. 
Perform the sensor (sheet through) 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 SCANNER TESTS.
3. Touch Sensor Tests.
4. Touch Sheet through.
Does the display on the operator panel change every time 
the sensing area of the above sensor is blocked?Go to step 10. Go to step 9.
9 Check the sensor (sheet through) for connection.
Is the above sensor connected properly?Replace the 
sensor (sheet 
through). 
Go to “Sensor 
(sheet through) 
removal” on 
page 4-200.Replace the 
connection.
10 Check the feed drive motor connection.
Is the above motor connected properly?Replace the ADF 
feed drive motor 
assembly.
Go to “ADF feed 
drive motor 
assembly 
removal” on 
page 4-172.Replace the 
connection.
11 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 11.
12 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 
						

							2-90MFP Service Manual 7500-XXX
290.02 Sensor (ADF pre-registration) on jam ADF simplex side 1
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 Open the ADF left cover assembly and inspect the 
document set actuator as shown in the graphic below.
Is the document set actuator flag flat as shown in the 
graphic below?Replace the 
document set 
actuator. 
Note: To  r e c e i v e  
the new rounded 
flag actuator, 
order 40X2283.
Go to 
“Document set 
actuator 
removal” on 
page 4-180.If problem 
remains, go to 
step 3.
3 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 4. 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.
4 Check the media path for contaminates.
Is the media path free of excess media dust and foreign 
objects such as paper clips and staples?Go to step 5. Remove all 
contaminates 
from the media 
path. 
						

							Diagnostic information2-91
7500-XXX
5 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 7. Go to step 6.
6 Check the sensor (ADF pre-registration) for connection.
Is the above sensor connected properly?Replace the 
sensor (ADF pre-
registration). 
Go to “Sensor 
(ADF pre-
registration)” on 
page 4-188.Replace the 
connection.
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 motor connected properly?Replace the ADF 
feed drive motor 
assembly. 
Go to “ADF feed 
drive motor 
assembly 
removal” on 
page 4-172.Replace the 
connection.
9 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 10.
10 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 
						

							2-92MFP Service Manual 7500-XXX
290.03 Sensor (ADF pre-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 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 paper clips and staples?Go to step 4. Remove all 
contaminates from 
the media path.
4 Check the sensor (sheet through) for operation. 
Perform the sensor (sheet through) 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 SCANNER TESTS.
3. Touch Sensor Tests.
4. Touch Sheet through.
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 the sensor (sheet through) for connection.
Is the above sensor connected properly?Replace the 
sensor (sheet 
through). 
Go to “Sensor 
(sheet through) 
removal” on 
page 4-200.Replace the 
connection.