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.
StepCheckYe sNo
1Check the media. 
Pull out the tray, and visually check it.
Is the media loaded in tray properly?Go to step 2.Load media 
properly.
2Check the media. 
Pull out the tray, and visually check it.
Are the front media guide and rear media guide on 
tray 3 or tray 4 set correctly?Go to step 3.Set the parts 
correctly.
3Check the switch (TTM media size) for proper 
installation.
Pull out the tray, and visually check it.
Is the switch (TTM media size) for tray 3 or tray 4 
installed properly?Go to step 4.Install the switch 
(TTM media size) 
correctly.
Go to “2000-sheet 
dual input (TTM)–
switch (TTM media 
size) removal” on 
page 4-242.
4Check the switch (TTM media size) for proper 
connection.
Check tray 3 and tray 4.
Are the above sensors connected properly?Replace the 
appropriate switch 
(TTM media size).
Go to “2000-sheet 
dual input (TTM)–
switch (TTM media 
size) removal” on 
page 4-242.Replace the 
connection.
5Check the 2TM/TTM controller card assembly and the 
printer engine card assembly for proper connection. 
Are connectors P541 and P413 on the above cards 
connected properly?Go to step 6.Replace the 
connection. Step Check Yes No 
						

							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 media loaded in the selected tray?Go to step 2. Load media 
properly.
2 Check the sensor (media out) for operation.
1. Enter the Diagnostics Menu.
2. Touch INPUT TRAY TESTS.
3. Touch Sensor test.
4. Touch Tr a y  1 .  
5.To u c h Media out.
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.
Remove the media tray assembly.
Does the display, on the operator panel, change every time 
the sensing area is blocked by the media out actuator?Go to step 4. Go to step 3.
3 Check the sensor (media out) connection for tray 1 or 
tray 2.
Is the sensor (media out) properly connected for tray 1 or 
tray 2? Replace the 
sensor (media 
out). 
Go to “Sensor 
(media out) 
removal” on 
page 4-40.Replace the 
connection.
StepCheckYe sNo 
						

							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 .  
5.To u c h Media out.
1. Enter the Diagnostics Menu.
2. Touch INPUT TRAY TESTS.
3. Touch Sensor test.
4. Touch Tr a y  4 .  
5.To u c h Media out.
Remove the appropriate media tray assembly.
Does the display on the operator panel change every 
time the sensing area on the above sensor is blocked by 
the media out actuator.Go to step 4.Go to step 3.
3Check the sensor (media out) for proper connection.
Check tray 3 and tray 4.
Is the above sensor connected properly?Replace the 
appropriate sensor 
(media out).
Go to “2000-sheet 
dual input (TTM)–
sensor (media out) 
removal” on 
page 4-255.Replace the 
connection.
4Check the 2TM/TTM controller card assembly and the 
printer engine card assembly for proper connection.
Are connectors P541 and P413 on the above cards 
connected properly?Go to step 5.Replace the 
connection.
5Perform 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 6.Problem solved. Step Check Yes No 
						

							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 and 
right arrow at 
power on) and 
then find the menu 
item short edge 
printing.Go to step 2.
2 Perform 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 PC cartridge for proper installation. 
Is the PC cartridge installed properly?Go to step 2. Install the PC 
cartridge properly.
2 Is the sensor (RFID PC cartridge) installed properly? Go to step 4. Go to step 3.
3 Check the sensor (RFID PC cartridge) connection.
Is the sensor (RFID PC cartridge) connected properly?Replace the 
sensor (RFID PC 
cartridge)
Go to “Sensor 
(RFID PC 
cartridge) and 
sensor (RFID 
toner cartridge) 
removal” on 
page 4-94.Connect P/J126 
and P/J419 
properly.
StepCheckYe sNo 
						

							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 installed?Go to step 3.  Install the sensor 
(RFID PC 
cartridge). 
3 Check the sensor (RFID PC cartridge) connection.
Is the sensor (RFID PC cartridge) properly connected.Replace the 
sensor (RFID PC 
cartridge). 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.
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 Perform a POR.
Does the error continue?Go to step 3. Problem solved.
3 Remove the PC cartridge from the machine.
Remove the two screws securing the plastic to the front of 
the PC cartridge. 
Remove the plastic cover.
Is the connector on the front of the PC cartridge connected 
properly?Replace the PC 
cartridge.Replace the 
connection.
4 Perform a POR.
Does the error continue?Go to step 5. Problem solved. Step Check Yes No 
						

							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 door assembly and the front door 
assembly and check it.
Does the display, on the operator panel, change every time 
the PC cartridge is removed and replaced?Go to step 8. Go to step 7.
7 Check the switch (PC cartridge interlock) connection.
Is the connection P404 on the printer engine card 
connected properly?Replace the switch 
(PC cartridge 
interlock).
Go to “Switch 
(PC cartridge 
interlock) 
removal” on 
page 4-84.Replace the 
connection.
8 Perform a POR.
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 opening and closing of the printer front door 
assembly.
Is the printer front door assembly opening and closing 
normally?Go to step 2. Check the printer 
front door 
assembly for 
rotation 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 J printer front.
Open the printer front door assembly and check it.
Does the display, on the operator panel, change every time 
the switch actuator is operated?Go to step 4. Go to step 3. Step Check Yes No 
						

							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.
Step Check Yes No
1 Is the printer left door assembly opening and closing 
properly?Go to step 2. Check the printer 
left door assembly 
for deformation 
and reinstall it.
2 Check the switch (printer left door interlock) for operation.
1. Enter the Diagnostics Menu.
2. Touch BASE SENSOR TEST.
3. Touch Cover and Door.
4. Touch Door A left side.
Open the printer left door assembly and check it.
Does the display, on the operator panel, change every time 
the switch actuator is operated?Go to step 4. Go to step 3. 
3 Check the switch (printer left door interlock) connection.
Is the switch (printer left door interlock) connected properly?Replace the switch 
(printer left door 
interlock). 
Go to “Switch 
(printer left door 
interlock) 
removal” on 
page 4-76.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. Step Check Yes No 
						

							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 and check it.
Does the display, on the operator panel, change every time 
the switch actuator is operated?Go to step 4. Go to step 3.
3 Check the switch (printer left lower door interlock) 
connection.
Is the switch (printer left lower 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.
Step Check Yes No
1 Install the proper maintenance kit.
Does the message still occur?Reset the 
maintenance 
counter.
Go to “Scheduled 
maintenance” on 
page 6-2.Problem solved.
Step Check Yes No
1 Check the actuator for movement.
Does the standard bin 1 full actuator move up and down 
normally?Go to step 2.  Reinstall the 
standard bin 1 full 
actuator. 
						

							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 “Sensor 
(exit 1 bin full) 
removal” on 
page 4-109.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 
interface card 
assembly. 
Go to “Exit 
interface card 
assembly 
removal” on 
page 4-116.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.
Step Check Yes No
1 Check the actuator for movement.
Does the media weight assembly move up and down 
normally?Go to step 2. Reinstall the 
media weight 
assembly.
2 Check the sensor (standard bin full exit 2) for operation.
1. Enter the Diagnostics Menu.
2. Touch BASE SENSOR TEST.
3. Touch Exit level.
4. Touch Standard bin full 2
Does the display, on the operator panel, change every time 
the sensing area is blocked?Go to step 5. Go to step 3. Step Check Yes No 
						

							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 
interface card 
assembly. 
Go to “Exit 
interface card 
assembly 
removal” on 
page 4-116.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.
Step Check Yes No
1 Check the scanner interface cable assembly connection 
between the RIP card assembly and the scanner unit 
assembly.
Is the scanner interface cable assembly connected properly?Go to step 2. Replace the 
connection.
2 Check all connections of the scanner controller card assembly.
Are the connections of the scanner controller card assembly 
connected properly?Go to step 3. Connect each 
connector of the 
scanner 
controller card 
assembly 
properly.
3 Perform a POR.
Does the error remain when the power is turned off/on?Replace the 
scanner 
controller card 
assembly. 
Go to “Scanner 
controller card 
assembly 
removal” on 
page 4-143.
Go to step 4.Problem solved.
4 Perform a POR.
Does the error remain when the power is turned off/on again?Replace the RIP 
card assembly. 
Go to “RIP card 
assembly 
removal” on 
page 4-128.Problem solved. Step Check Yes No