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...

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”...

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...

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...

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...

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...

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...

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...

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...

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...