Lower Engine Pcba Fuse 13 Blown; Upper Engine Pcba Data Failure; Upper Engine Pcba Access Failure - Lexmark X95x series Service Manual

Step Action and questions
POR the machine.
2
Does the error continue?

191.17 Lower engine PCBA fuse 13 blown

Step Action and questions
Warning: Remove the cause of
1
blown fuse before replacing the
lower engine PCBA.
Check the PC/Developer drive
motor (Y,M,C) circuits for
overcurrent and overvoltage:
Are the current and voltage
values normal?
POR the machine.
2
Does the error continue?

191.18 Upper engine PCBA data failure

Step Action and questions
POR The machine.
1
Does the error continue?
Install the correct version of the
2
firmware.
Does the problem persist?

191.19 Upper engine PCBA access failure

Step Action and questions
POR The machine.
1
Does the error continue?
Turn the power OFF and check
2
whether there is poor connection
between the EEPROM and the
upper engine PCBA.
Are there no problems with the
connection?
Yes
Replace the lower engine PCBA.
Go to
"Lower engine PCBA
removal" on page 4-104.
Yes
Go to step 2.
Replace the lower engine PCBA.
Go to
"Lower engine PCBA
removal" on page 4-104.
Yes
Go to step 2
Turn the power OFF, and replace
the upper printer engine PCBA.
Go to
"Upper printer engine
PCBA removal" on page 4-186.
Yes
Go to step 2
Turn the power OFF, and replace
the upper printer engine
assembly. Go to
"Upper printer
engine PCBA removal" on
page 4-186.
7558-xxx
No
Problem resolved
No
Replace the faulty parts, or repair
the circuits.
Problem resolved
No
Problem resolved
Problem resolved
No
Problem resolved
Problem resolved
Diagnostic information
Previous
Next
Go Back
2-87