Ricoh Aficio SP 100SF Service Manual page 210

6. Troubleshooting
SC543 C9
SC544 c1
SC545 c2
208
A High Temperature Error - Software (Fatal Error)
The temperature inside the fusing unit exceeded 225°C (437°F) for more
than 1 sec.
• After this error has occurred three times, the machine will shut down
and must be released with the Smart Organizing Monitor and
serviced by a service technician.
• Main board defective
• PSU defective (TRIAC short)
• After servicing the machine to solve the problem, the service
technician must execute a "Fuser SC Reset". Otherwise, the machine
will continue to issue this SC code and cannot be operated. (
p.202 "Executing Fuser SC Reset")
A High Temperature Error- Hardware (Fatal Error)
The machine detected the CPU port LOW twice at 100 ms intervals and
issued this SC. This check is always done to check for overheating, even if
SC543 does not detect the problem.
• Fusing unit defective
• Main board defective
• PSU defective (TRIAC short)
• After servicing the machine to solve the problem, the service
technician must execute a "Fuser SC Reset". Otherwise, the machine
will continue to issue this SC code and cannot be operated. (
p.202 "Executing Fuser SC Reset")
A Fusing Lamp Remains ON Error (Fatal Error)
The heating element of the fusing lamp remained at full power longer than
9 sec. after the reload temperature was detected.
• Fusing thermistor harness connector loose, broken, defective
• Fusing thermistor warped or positioned incorrectly
• Fusing lamp harness connector loose, broken, defective
• After servicing the machine to solve the problem, the service
technician must execute a "Fuser SC Reset". Otherwise, the machine
will continue to issue this SC code and cannot be operated. (
p.202 "Executing Fuser SC Reset")