Ricoh Aficio SP 100SF Service Manual page 209

SC541 C7 A
SC542 C8 A
One of the following problems occurred:
• The machine failed to detect a LOCK signal within two sec. after the
main motor was turned on.
• The machine failed to detect a LOCK release signal with 2 sec. after
the main motor was turned off.
• Cycle the machine off/on
• Check the areas around motor and main drive train for a physical
obstruction (paper scraps, etc.)
• Clean the main motor drive train
• AIO defective
• Main motor defective
Fusing Unit Thermistor Error (Fatal Error)
No temperature was detected within 5 sec. after the machine was turned
on (temperature was less than 0°C).
• Fusing unit thermistor disconnected, broken or not set correctly
• Fusing lamp disconnected, broken or not set correctly.
• Fusing unit 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")
Fusing Reload Temperature Error (Fatal Error)
After starting up or during operation he machine detected after 5 readings
at 1.5 sec. intervals that the hot roller was 5°C below the reload
(operating) temperature.
• Fusing thermistor deformed or out of position
• Fusing lamp harness loose, broken, defective
• Fusing unit 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")
Service Calls
207