Ricoh C231 Service Manual page 390

No.
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.
C231/C237/C238
Symptom
4-2
ERROR CODES
Possible cause
Drum sensors
Feeler
Drum sensors
Feeler
Drum sensors
Feeler
Drum sensors
Feeler
SM