Ricoh C249 Service Manual page 100

ERROR CODES
No.
E-18 Drum Overheat
The temperature of the drum is greater than 54°C when
the Start key is pressed.
E-21 Paper Exit Timing Sensor error
The paper exit timing sensor does not activate before the
master eject position sensor activates.
E-22 2nd Feed Timing Sensor error
The 2nd feed timing sensor does not activate before the
paper exit timing sensor activates.
E-23 Master Eject Position Sensor (Drum HP) error
The master eject position sensor does not activate
before the feed start timing sensor activates.
E-24 Feed Start Timing Sensor error
The feed start timing sensor does not activate before the
2nd feed timing sensor activates.
E-40 Thermal Head ID error
The CPU detects an abnormal ID signal from the thermal
head.
E-41 Idling roller HP sensor remains on or off
The idling roller HP sensor does not change status within
4.0 seconds after the idling roller motor on signal is
generated.
E-42 Duct plate error
The duct plate HP sensor does not change status within
4.0 seconds after the duct plate motor on signal is
generated.
E-43 Printing Pressure error
The printing pressure HP sensor does not change status
within 4.0 seconds after the printing pressure motor on
signal is generated.
E-44 MPU ASIC error
The machine detects a failure in the MPU ASIC.
E-47 Thermal head driving error
The thermal head HP sensor does not change status
within 4.0 seconds after the thermal head driving motor
on signal is generated.
C249
Symptom
4-2
Possible cause
Drum overheat
Thermistor
Drum sensors
Feeler
Drum sensors
Feeler
Drum sensors
Feeler
Drum sensors
Feeler
Thermal head
MPU
Thermal head connector
disconnected
Idling roller HP sensor
Ink idling motor
Duct plate HP sensor
Duct plate motor
Printing pressure HP
sensor
Printing pressure motor
MPU
Thermal head HP sensor
Thermal head driving
motor
SM