Ricoh M199 - Page 154

Service Call Conditions
M199/M200/M203/M204 5-8 SM
 Deformed thermistor
 Thermistor not in the correct position
 Defective fusing lamp
1. Replace the fusing unit.
2. Replace the fusing lamp.
 Execute "Engine Maintenance Menu" to recover the machine after
completing the recovery procedure. Otherwise, the machine continues to
issue this SC code and cannot be operated.
547
Zero Cross Error
The zero cross signal is not detected for three seconds even though the fusing
lamp relay is on after turning on the main power or closing the front door.
 Defective fusing lamp relay
1. Turn the main power switch off and on.
 Execute "Engine Maintenance Menu" to recover the machine after
completing the recovery procedure. Otherwise, the machine continues to
issue this SC code and cannot be operated. The power should be turned
off and on after the recovery procedure.
548
Low Temperature Error
The center thermistor detects 100°C or less for 4 seconds.
 Defective fusing lamp
 Defective thermistor
1. Replace the fusing unit.
2. Replace the fusing lamp.
 Execute "Engine Maintenance Menu" to recover the machine after
completing the recovery procedure. Otherwise, the machine continues to
issue this SC code and cannot be operated.