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7558-xxx
Step
Action and questions
POR the machine.
3
Does the error continue?
121.02 Encoder pulse failure
Step
Action and questions
Check the fuser assembly.
1
Is the above component
properly connected?
Replace the fuser assembly. Go
2
to
"Fuser assembly removal"
on page
4-84.
Does the error remain?
POR the machine.
3
Does the error continue?
121.03 Heat belt (center) disconnection error
Step
Action and questions
Check the fuser assembly.
1
Is the above component
properly connected?
Replace the fuser assembly. Go
2
to
"Fuser assembly removal"
on page
4-84.
Does the error remain?
POR the machine.
3
Does the error continue?
121.04 Heat belt (center) overheat error
Step
Action and questions
Check the fuser assembly.
1
Is the above component
properly connected?
Service Manual
2-56
Yes
Replace the upper printer engine
PCBA.
Go to
"Upper printer engine
PCBA removal" on page
4-187.
Yes
Go to step 2.
Go to step 3.
Replace the upper printer engine
PCBA.
Go to
"Upper printer engine
PCBA removal" on page
4-187.
Yes
Go to step 2.
Go to step 3.
Replace the upper printer engine
PCBA.
Go to
"Upper printer engine
PCBA removal" on page
4-187.
Yes
Go to step 2.
No
Problem resolved
No
Replace the connections.
Problem resolved
Problem resolved
No
Remove foreign particles, and
replace the connections.
Problem resolved
Problem resolved
No
Remove foreign particles, and
replace the connections.
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