Lexmark X 850 Owners Manual

							Diagnostic information2-173
7500-XXX
950.30 through 950.60 EPROM mismatch failure
6 If problem remains, replace the original panel assembly with 
a new and not previously installed interconnect card 
assembly.
Go to “Interconnect card assembly removal” on 
page 4-131.
Does the error remain?Contact the next 
level of support.Problem solved.
Warning: In the event of replacement of any one of the following components:
• Operator panel assembly (universal)
• Operator panel controller card assembly
• RIP card assembly
• Interconnect card assembly
Only replace one component at a time. Replace the required component, and perform a POR before replacing 
a second component listed above. If this procedure is not followed, the printer will be rendered inoperable. 
Never replace two or more of the components listed above without a POR after installing each one, or the 
printer will be rendered inoperable.
Warning: Never install and remove components listed above as a method of troubleshooting components. 
Once a component has been installed in a machine, it cannot be used in another machine. It must be returned 
to the manufacturer.
Step Check Yes No
1 Check the interconnect card assembly.
Was the interconnect card assembly recently replaced?Go to step 3. Go to step 2. 
2 Check the RIP card assembly.
Was the RIP card assembly recently replaced?Go to step 4. Contact next level 
of support.
3 Replace the current interconnect card assembly with the 
original interconnect card assembly.
Does the error remain?Go to step 5 Problem solved.
4 Replace the current RIP card assembly with the original RIP 
card assembly.
Go to “Interconnect card assembly removal” on 
page 4-131.
Does the error remain?Go to step 6. Problem solved.
5 If problem remains, replace the original interconnect card 
assembly with a new and not previously installed 
interconnect card assembly.
Does the error remain?Contact the next 
level of support.Problem solved.
6 If problem remains, replace the original panel assembly with 
a new and not previously installed interconnect card 
assembly.
Go to “Interconnect card assembly removal” on 
page 4-131.
Does the error remain?Contact the next 
level of support.Problem solved. 
						

							2-174MFP Service Manual 7500-XXX
951.XX RIP card assembly NVRAM failure
952.XX Interconnect card assembly NVRAM CRC failure
953.XX Operator panel assembly NVRAM failure
Step Check Yes No
1 Perform a POR.
Does the error occur when the power is turned off/on?Go to step 2. Perform several 
print tests. 
If the problem 
remains, go to 
step 2.
2 Turn the printer off for 60 seconds.
Does the error occur when the power is turned off/on again?Replace the RIP 
card assembly. 
Go to “RIP card 
assembly 
removal” on 
page 4-128.
Go to step 3.Problem solved.
Step Check Yes No
1 Perform a POR.
Does the error occur when the power is turned off/on?Go to step 2. Perform several 
print tests. 
If the problem 
remains, go to 
step 2.
2 Turn the printer off for 60 seconds.
Does the error occur when the power is turned off/on again?Replace the 
interconnect card 
assembly. 
Go to 
“Interconnect 
card assembly 
removal” on 
page 4-131.
Go to step 3.Problem solved.
3 Perform a print test.
Does the error still occur?Replace the RIP 
card assembly.
Go to “RIP card 
assembly 
removal” on 
page 4-128.Problem solved.
Step Check Yes No
1 Perform a POR.
Does the error occur when the power is turned off/on?Go to step 2. Perform several 
print tests. 
If the problem 
remains, go to 
step 2. 
						

							Diagnostic information2-175
7500-XXX
954.XX Interconnect card assembly NVRAM failure
955.XX RIP card assembly NAND CRC failure
2 Turn the printer off for 60 seconds.
Does the error occur when the power is turned off/on again?Replace the 
operator panel 
assembly. 
Go to “Operator 
panel assembly 
removal” on 
page 4-136.
Go to step 3.Problem solved.
3 Perform a print test.
Does the error still occur?Replace the RIP 
card assembly.
Go to “RIP card 
assembly 
removal” on 
page 4-128.
Go to step 4.Problem solved.
Step Check Yes No
1 Perform a POR.
Does the error occur when the power is turned off/on?Go to step 2. Perform several 
print tests. 
If the problem 
remains, go to 
step 2.
2 Turn the printer off for 60 seconds.
Does the error occur when the power is turned off/on again?Replace the inner 
connect card 
assembly. 
Go to 
“Interconnect 
card assembly 
removal” on 
page 4-131.
Go to step 3.Problem solved.
3 Perform a print test.
Does the error still occur?Replace the RIP 
card assembly.
Go to “RIP card 
assembly 
removal” on 
page 4-128.
Go to step 4.Problem solved.
Step Check Yes No
1 Perform a POR.
Does the error occur when the power is turned off/on?Go to step 2. Perform several 
print tests. 
If the problem 
remains, go to 
step 2. Step Check Yes No 
						

							2-176MFP Service Manual 7500-XXX
956.00 RIP card assembly processor failure
956.01 RIP card assembly processor over temperature failure
956.02 RIP card assembly cooling fan failure 
2 Turn the printer off for 60 seconds.
Does the error occur 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
1 Perform a POR.
Does the error occur when the power is turned off/on?Go to step 2. Perform several 
print tests. 
If the problem 
remains, go to 
step 2.
2 Turn the printer off for 60 seconds.
Does the error occur 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
1 Perform a POR.
Does the error occur when the power is turned off/on?Go to step 2. Perform several 
print tests. 
If the problem 
remains, go to 
step 2.
2 Turn the printer off for 60 seconds.
Does the error occur when the power is turned off/on again?Go to step 3. Problem solved.
3 Check the RIP card cooling fan and heatsink for proper 
installation.
Is the RIP card cooling fan and heatsink installed correctly?Replace the RIP 
card assembly.
Go to “RIP card 
assembly 
removal” on 
page 4-128.Install the RIP 
card cooling fan 
and heatsink 
correctly.
Step Check Yes No
1 Perform a POR.
Does the error occur when the power is turned off/on?Go to step 2. Perform several 
print tests. 
If the problem 
remains, go to 
step 2. Step Check Yes No 
						

							Diagnostic information2-177
7500-XXX
956.03 RIP card assembly FPGA failure
980.00 2TM/TTM
 controller card assembly communication failure
2 Turn the printer off for 60 seconds.
Does the error occur when the power is turned off/on again?Go to step 3. Problem solved.
3 Checking the RIP card assembly cooling fan and heatsink 
attachment.
Is the above fan attached properly?Replace the RIP 
card assembly.
Go to “RIP card 
assembly 
removal” on 
page 4-128.Reattach the RIP 
card assembly 
cooling fan and 
heatsink.
Step Check Yes No
1 Perform a POR. 
Does the error occur when the power is turned off/on?Go to step 2. Perform several 
print tests. 
If the problem 
remains, go to 
step 2.
2 Turn the printer off for 60 seconds.
Does the error occur 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.
StepCheckYe sNo
1Check 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?Problem solved.Replace the 
connection.
2Perform 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 3.Problem solved.
3Perform 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 
						

							2-178MFP Service Manual 7500-XXX
980.03 Exit interface card assembly communication failure
980.04 Duplex controller card assembly communication failure
Step Check Yes No
1 Check the exit interface card assembly for proper 
connection. Go to step 2. Replace the 
connection.
2 Check the connection between the exit interface card 
assembly P430 and the LVPS assembly P526. 
 Are the cards connected properly?Go to step 3. Replace the 
connection.
3 Perform a print test.
Does the error continue?Replace the exit 
interface card 
assembly.
Go to “Exit 
interface card 
assembly 
removal” on 
page 4-116Problem solved.
4 Perform a print test.
Does the error continue?Replace the 
printer engine cord 
assembly.
Go to “Printer 
engine card 
assembly 
removal” on 
page 4-117.Problem solved.
StepCheckYe sNo
1Check the duplex unit for proper installation.
Remove duplex unit assembly, and reinstall it.
Perform a two sided print test. 
Does the error still occur?Go to step 2.Problem solved.
2Check the duplex controller card assembly and printer 
engine card assembly for proper connection. 
Are the connections on the duplex controller card 
assembly and the connector P417 on the printer engine 
card assembly connected?Go to step 3.Replace the 
connection.
3Perform a 2 sided print test.
Does the error still occur?Replace the duplex 
controller card 
assembly. 
Go to “Duplex 
controller card 
assembly removal” 
on page 4-304.
Go to step 4.Problem solved.
4Perform 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. 
						

							Diagnostic information2-179
7500-XXX
980.05 Engine flicker communication failure 
997.00 Duplex controller card assembly type failure
Step Check Yes No
1 Perform a POR.
Does the error occur when the power is turned off/on?Go to step 2. Perform several 
print tests. 
If the problem 
remains, go to 
step 2.
2 Turn the printer off for 60 seconds.
Does the error occur when the power is turned off/on again?Replace the 
printer engine card 
assembly. 
Go to “Printer 
engine card 
assembly 
removal” on 
page 4-117.Problem solved.
StepCheckYe sNo
1Check the duplex unit for proper installation.
Remove duplex unit assembly, and reinstall it.
Perform a two sided print test. 
Does the error still occur?Go to step 2.Problem solved.
2Perform a 2 sided print test.
Does the error still occur?Replace the duplex 
controller card 
assembly. 
Go to “Duplex 
controller card 
assembly removal” 
on page 4-304.
Go to step 3.Problem solved.
3Perform 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. 
						

							2-180MFP Service Manual 7500-XXX
2TM/TTM left door assembly open
StepCheckYe sNo
1Check the 2TM/TTM left door assembly for opening and 
closing.
Does the 2TM/TTM left door assembly open or close 
normally?Go to step 2.Check the 2TM/TTM 
left door assembly 
for deformation, and 
reinstall it.
Go to “2000-sheet 
dual input (TTM)–
2TM/TTM left door 
assembly removal” 
on page 4-269.
2Check the switch (2TM/TTM left door interlock) for 
proper operation.
1. Enter the Diagnostics Menu.
2. Touch BASE SENSOR TEST.
3. Touch Cover and Door.
4. Touch Door C 2TM/TTM.
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 switch operates?Go to step 4. Go to step 3.
3Check the switch (2TM/TTM left door interlock) for 
proper connection.
Is the above switch connected properly?Replace the switch 
(2TM/TTM left door 
interlock).
Go to “2000-sheet 
dual input (TTM)–
switch (2TM/TTM 
left door interlock) 
removal” on 
page 4-270.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.
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. 
						

							Diagnostic information2-181
7500-XXX
Duplex left door assembly open
Exit 2 left door assembly open
StepCheckYe sNo
1Check the duplex left door assembly for opening and 
closing.
Does the duplex left door assembly open or close 
normally?Go to step 2.Check the duplex 
left cover assembly 
for deformation and 
reinstall it.
2Check the switch (duplex left door interlock) for proper 
operation.
1. Enter the Diagnostics Menu.
2. Touch DUPLEX TESTS.
3. Touch Sensor Test.
4. Touch Door D duplex left.
Open the duplex left door assembly, and visually check 
it. 
Does the operator panel change every time the actuator 
on the above switch operates?Reconnect the 
connector on the 
printer engine card 
assembly.Go to step 3.
3Check the switch (duplex left door interlock) for proper 
connection.
Is the above switch connected properly?Go to step 4.Replace the 
connection.
4Check the duplex controller card assembly and printer 
engine card assembly for proper connection. 
Are the connections on the duplex controller card 
assembly and the connector P417 on the printer engine 
card assembly connected?Go to step 5.Replace the 
connection.
5Perform a 2 sided print test.
Does the error still occur?Replace the duplex 
controller card 
assembly. 
Go to “Duplex 
controller card 
assembly removal” 
on page 4-304.
Go to step 6.Problem solved.
6Perform 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 exit 2 left door assembly for opening and 
closing.
Does the exit 2 left door assembly open or close 
normally?Go to step 2.Check the exit 2 left 
door assembly for 
deformation, and 
then reinstall it.
Go to “Exit 2 left 
cover removal” on 
page 4-319. 
						

							2-182MFP Service Manual 7500-XXX
Media size mismatch in width
2Check the switch (exit 2 left door interlock) for proper 
operation.
1. Enter the Diagnostics Menu.
2. Touch BASE SENSOR TEST.
3. Touch Cover and Door.
4. Touch Door E exit2 left.
Does the display change on the operator panel every 
time the actuator for the above switch operates?Reconnect the 
connector of the 
printer engine card 
assembly.Go to step 3.
3Check the switch (exit 2 left door interlock) for proper 
connection.
Is the above switch connected properly?Replace the switch 
(exit 2 left door 
interlock).
Go to “Exit 2 switch 
(exit 2 left door 
interlock) removal” 
on page 4-324.Replace the 
connection.
4Perform a print test.
Does the error still occur?Replace the exit 
interface card 
assembly. 
Go to “Exit 
interface card 
assembly removal” 
on page 4-116.
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.
Pull out the tray to visually check it. 
Is media properly loaded in the tray?Go to step 2. Load media 
properly.
2 Check the media.
Pull out the tray to visually check it.
Are the front media tray guide assembly, rear media tray 
guide, and media tray end guide of tray 1 or tray 2 set 
correctly?Go to step 3. Set the guides 
properly.
3 Check the switch (media size) for proper installation.
Pull out the media tray to visually check it. 
Is the switch (media size) for media tray 1 and media tray 2 
installed correctly?Go to step 4. Install the switch 
(media size) for 
each media tray 
correctly.
StepCheckYe sNo