Lexmark X 850 Owners Manual

Diagnostic information2-183
7500-XXX
Media size mismatch in width
4 Check the switch (media size) connection for tray 1 and/or 
tray 2.
Is the switch (media size) properly connected for tray 1 and/or 
tray 2?Replace the 
required switch 
(media size). 
“Toner cartridge 
guide assembly 
removal” on 
page 4-95.Replace the 
connection.
5 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....

2-184MFP Service Manual 7500-XXX
No media in the select media tray
6Perform 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 7.Problem solved.
7Perform 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. 
Is...

Diagnostic information2-185
7500-XXX
No media in the select media tray
4 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.
StepCheckYe sNo
1Check the media.
Is the media loaded in the selected tray?Go to step 2.Load media 
properly.
2Check the sensor (media out) for proper operation.
1. Enter the Diagnostics Menu.
2. Touch INPUT TRAY TESTS.
3. Touch Sensor test.
4. Touch Tr a y  3 ....

2-186MFP Service Manual 7500-XXX
Paper is installed (short edge) in the media paper tray
PC cartridge end of life
6Perform 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 Is the media installed (short edge) orientation in the media 
tray assembly as opposed to long edge?Turn media 90 
degrees or enable 
short edge feeding 
which is found in 
the config menu 
(press select...

Diagnostic information2-187
7500-XXX
PC cartridge RFID failure
PC cartridge set failure
4 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 PC cartridge installation.
Is the PC cartridge properly installed? Go to step 2. Install the PC 
cartridge properly.
2 Check the sensor (RFID PC cartridge) installation.
Is the sensor (RFID PC cartridge) properly...

2-188MFP Service Manual 7500-XXX
Printer front door open
5 Check the PC cartridge sensor connection.
Is the PC cartridge sensor connector installed and 
functioning properly?Replace the PC 
cartridge sensor 
connector.Reinstall the PC 
cartridge sensor 
connector and 
ensure it connects 
to the PC cartridge 
properly.
6 Check the switch (PC cartridge interlock) for proper 
operation.
1. Enter the Diagnostics Menu.
2. Touch BASE SENSOR TEST.
3. Touch Devices.
4. Touch PC unit present.
Open printer left...

Diagnostic information2-189
7500-XXX
Printer left door open
3 Check the switch (printer front door interlock) connection.
Is the switch (printer front door interlock) properly 
connected?Replace the switch 
(printer front door 
interlock).
Go to “Switch 
(printer front 
door interlock) 
removal” on 
page 4-4.Replace the 
connection.
4 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....

2-190MFP Service Manual 7500-XXX
Printer left lower door open
Scheduled maintenance required
Standard bin 1 full 
Step Check Yes No
1 Is the printer left lower door assembly opening and closing 
properly? Go to step 2. Check the printer 
front door 
assembly for 
deformation and 
reinstall it.
2 Check the switch (printer front door interlock) for operation.
1. Enter the Diagnostics Menu.
2. Touch BASE SENSOR TEST.
3. Touch Cover and Door.
4. Touch Door B left/lower.
Open the printer front door assembly...

Diagnostic information2-191
7500-XXX
Standard bin 2 full
2 Check the sensor (standard bin full exit 1) for operation.
1. Enter the Diagnostics Menu.
2. Touch BASE SENSOR TEST.
3. Touch Exit level.
4. Touch Standard bin full 1.
Does the display, on the operator panel, change every time 
the sensing area is blocked?Go to step 5. Go to step 3.
3 Check the sensor (standard bin full 1) connection.
Is the sensor (standard bin full 1) properly connected?Replace the 
sensor (standard 
bin full exit 1).
Go to...

2-192MFP Service Manual 7500-XXX
Scanner missing failure
3 Check the sensor (standard bin full exit 2) connection.
Is the sensor (standard bin full exit 2) properly connected? Replace the 
sensor (standard 
bin full exit 2).
Go to “Exit 2 
sensor (standard 
bin full exit 2) 
removal” on 
page 4-330.Replace the 
connection.
Go to step 4.
4 Check the exit interface card assembly connection P432, 
P433, and P434.
Is the exit interface card assembly properly connected 
P432, P433, and P434?Replace the exit...