Lexmark X502N - Fuser Thermistor Service Check; Fuser Assembly Service Check

2-24 Service Manual
7100-XXX
Fuser thermistor service check
Fuser assembly service check
Step Questions / actions Yes No
1 Remove and reinstall fuser assembly. See
“Fuser assembly removal” on page 4-6.
Does error clear?
Problem solved. Go to step 2.
2 Check fuser connector for damage. Replace
if necessary. Does error clear?
Problem solved. Go to step 3.
3 Turn printer off, and check cable that
connects engine controller board connector
FUCN to fuser for proper connection,
continuity, and pin shorts. Is cable okay?
Go to step 4. Properly connect cable or
replace if damaged. If error
clears, problem solved,
otherwise go to step 4.
4 Replace fuser assembly. See “Fuser
assembly removal” on page 4-6. Does
error clear?
Note: Fuser is a customer order supply.
Problem solved. Replace engine controller
board. See “Engine
controller board removal”
on page 4-34.
Step Questions / actions Yes No
1 Check for proper input line voltage. Is line
voltage correct?
Go to step 2. Provide proper line voltage.
2 Remove and reinstall fuser assembly. See
“Fuser assembly removal” on page 4-6.
Does error clear?
Problem solved. Go to step 3.
3 Check fuser connector for damage. Replace
if necessary. Does error clear?
Problem solved. Go to step 4.
4 Turn printer off, and check cable that
connects engine controller board connector
FUCN to fuser for proper connection,
continuity, and pin shorts. Is cable okay?
Go to step 5. Properly connect cable or
replace if damaged. If error
clears, problem solved,
otherwise go to step 5.
5 Replace fuser assembly. See “Fuser
assembly removal” on page 4-6. Does
error clear?
Note: Fuser is a customer-ordered supply.
Problem solved. Replace LVPS. See “Low
voltage power supply
(LVPS) with cage
removal” on page 4-40. If
error does not clear,
replace engine controller
board. See “Engine
controller board removal”
on page 4-34.