Lexmark X 850 Owners Manual

Diagnostic information2-63
7500-XXX
5 Check the sensor (tray 2 feed-out) for proper operation.
1. Enter the Diagnostics Menu.
2. Touch INPUT TRAY TESTS.
3. Touch Sensor test.
4. Touch Tr a y  2 .  
5.To u c h Media out.
Open the printer left lower door assembly and check it. 
Does the display on the operator panel change every time a 
white piece of paper is placed over the sensing area?Go to step 7. Go to step 6.
6 Check the sensor (tray 2 feed-out) connection.
Is the sensor (tray 2 feed-out) properly...

2-64MFP Service Manual 7500-XXX
242.02 Sensor (registration) on jam (tray 2 feed) 
11 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
1 Check the media condition.
Is the media, in the 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 tray 2?Go to step...

Diagnostic information2-65
7500-XXX
7 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. 
8 Check the sensor (tray 2 feed-out) for proper operation. 
1. Enter the Diagnostics Menu.
2. Touch INPUT TRAY TESTS. 
3. Touch Sensor Test. 
4. Touch Tr a y  2 .
5. Touch Feed-out.
Open the printer left lower door assembly, and check it. 
Does the display on...

2-66MFP Service Manual 7500-XXX
242.03 Sensor (tray 2 feed-out) static jam 
243.00 Sensor (pre-feed) on jam (tray 3 media feed)
Step Check Yes No
1 Check the media position. 
Does the media touch the sensor (tray 2 feed-out)?
Open the printer left lower door assembly, and visually 
check it. Remove the 
media.Go to step 2.
2 Check the sensor (tray 2 feed-out) for proper operation.
1. Enter the Diagnostics Menu.
2. Touch INPUT TRAY TESTS. 
3. Touch Sensor Test. 
4. Touch Tr a y  2 .
5. Touch Feed-out....

Diagnostic information2-67
7500-XXX
4Check the media position.
Open the 2TM/TTM left door assembly, and visually 
check it. 
Does the media touch the sensor (pre-feed) of the tray 3 
media feed unit assembly?Remove the media.Go to step 5.
5Check the tray 3 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  3 .
5. Touch Feed-out.
Remove the media tray assembly.
Does the display on the operator panel change every 
time...

2-68MFP Service Manual 7500-XXX
243.01 Sensor (tray 3 feed-out) on jam (tray 3 media feed)
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...

Diagnostic information2-69
7500-XXX
5Check the sensor (tray 3 feed-out) for proper operation.
1. Enter the Diagnostics Menu.
2. Touch INPUT TRAY TESTS.
3. Touch Sensor Test.
4. Touch Tr a y  3 .
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 7.Go to step 6.
6Check the sensor (tray 3 feed-out) for proper 
connection.
Is the above sensor connected properly?Replace...

2-70MFP Service Manual 7500-XXX
243.02 Sensor (tray 2 feed-out) on jam (tray 3 media feed)
11Perform 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 condition.
Is the media in the tray crumpled or damaged?Replace the media.Go to step 2.
2Check the media size setup.
Does the media size in use match the size set for 
tray 3?Go to step 3.Replace the media 
or...

Diagnostic information2-71
7500-XXX
243.03 Sensor (registration) on jam (tray 3 media feed)
7Check the sensor (tray 2 feed-out) for proper 
connection.
Is the above sensor connected properly?Replace the sensor 
(tray 2 feed-out).
Go to “Sensor 
(tray 2 feed-out) 
removal” on 
page 4-83.Replace the 
connection.
8Check the sensor (tray 3 feed-out) for proper operation.
1. Enter the Diagnostics Menu.
2. Touch INPUT TRAY TESTS.
3. Touch Sensor Test.
4. Touch Tr a y  3 .  
5. Touch Feed-out.
Open the 2TM/TTM...

2-72MFP Service Manual 7500-XXX
2Check the media size setup.
Does the media size in use match the size set for tray 
3?Go to step 3.Replace the media 
or change the media 
size setup.
3Check the tray 3 rolls.
Pull out tray 3, 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...