Lexmark X500n Service Manual - Page 62

Fuser thermistor service check, Fuser assembly service check

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7100-XXX Fuser thermistor service check Step 1 2 3 4 Questions / actions Yes Remove and reinstall fuser assembly. See "Fuser assembly removal" on page 4-6. Does error clear? Problem solved. Check fuser connector for damage. Replace Problem solved. if necessary. Does error clear? 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. Replace fuser assembly. See "Fuser assembly removal" on page 4-6. Does error clear? Problem solved. Note: Fuser is a customer order supply. Fuser assembly service check Step 1 2 3 4 5 Questions / actions Yes Check for proper input line voltage. Is line voltage correct? Go to step 2. Remove and reinstall fuser assembly. See "Fuser assembly removal" on page 4-6. Does error clear? Problem solved. Check fuser connector for damage. Replace Problem solved. if necessary. Does error clear? 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. Replace fuser assembly. See "Fuser assembly removal" on page 4-6. Does error clear? Problem solved. Note: Fuser is a customer-ordered supply. No Go to step 2. Go to step 3. Properly connect cable or replace if damaged. If error clears, problem solved, otherwise go to step 4. Replace engine controller board. See "Engine controller board removal" on page 4-34. No Provide proper line voltage. Go to step 3. Go to step 4. Properly connect cable or replace if damaged. If error clears, problem solved, otherwise go to step 5. 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. 2-24 Service Manual

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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
.