Ricoh M199 - Page 152

Service Call Conditions
M199/M200/M203/M204 5-6 SM
 Disconnected or defective motor harness.
 Defective LSU fan motor
1. Check or replace the motor harness.
2. Replace the LSU fan motor.
531
Fusing Fan Motor Error
A LOCK signal is not detected for more than ten seconds while the motor START
signal is on and if this error occurs twice consecutively, this SC is issued.
 Disconnected or defective motor harness.
 Defective LSU fan motor
1. Check or replace the motor harness.
2. Replace the fusing fan motor.
541
Thermistor Error
The thermistor output is less than 0°C for 7 seconds.
 Disconnected thermistor
 Defective harness connection
1. Check the harness connection of the thermistor.
2. Replace the fusing unit.
 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.
542
Print Ready Temperature Error
 The heating roller temperature increase during a set time is not correct.
 The fusing temperature does not reach the print ready temperature within a
set time after the fusing lamp has turned on.