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