Hcf Unit Nvm R/W Failure; Tray 5 Hcf Communication Failure - Lexmark W840 Service Manual

4024-XXX
Step
9 Perform a print test.
Does the error still occur?

945.01 HCF unit NVM R/W failure

Step
1 Turn the main switch off and on several times.
Does the error still occur when the power is on?
2 Check the HCF controller card assembly and printer
engine card assembly for proper connection.
Are the connectors connected to the HCF controller
card assembly and connectors P414 and P415 on the
printer engine card assembly connected properly?
3 Perform a print test.
Does the error still occur?
4 Perform a print test.
Does the error still occur?

980.01 Tray 5 HCF communication failure

Step
1 Turn the main switch off and on several times.
Does the error still occur when the power is on?
2 Check the HCF controller card assembly and printer
engine card assembly for proper connection.
Are the connectors connected to the HCF controller
card assembly and connectors P414 and P415 on the
printer engine card assembly connected properly?
3 Perform a print test.
Does the error still occur?
2-78
Options Service Manual
Check
Check
Check
Yes
Replace the printer Problem solved.
engine card
assembly.
Refer to the Printer
Service Manual.
Yes
Go to step 2. Problem solved.
Go to step 3. Replace the
connection.
Replace the HCF Problem solved.
controller card
assembly.
Go to "HCF
controller card
assembly removal"
on page 4-152.
Go to step 4.
Replace the printer Problem solved.
engine card
assembly.
Refer to the Printer
Service Manual.
Yes
Go to step 2. Problem solved.
Go to step 3. Replace the
connection.
Replace the HCF Problem solved.
controller card
assembly.
Go to "HCF
controller card
assembly removal"
on page 4-152.
Go to step 4.
No
No
No