Ricoh DD 4450 - More Service Call Error Codes and Causes

Service Call Conditions
SM Appendix 5 C279
Appendix:
Service Call
Conditions
No. Symptom Possible cause
E-23 Master Eject Position Sensor (Drum HP) error
The master eject position sensor does not activate
before the feed start timing sensor activates.
Drum sensors
Feeler
E-24 Feed Start Timing Sensor error
The feed start timing sensor does not activate before
the 2nd feed timing sensor activates.
Drum sensors
Feeler
E-40 Thermal Head ID error
The CPU detects an abnormal ID signal from the
thermal head.
Thermal head
MPU
Thermal head
connector disconnected
E-41 Ink 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.
Idling roller HP sensor
Ink idling motor
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.
Duct plate HP sensor
Duct plate motor
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.
Printing pressure HP
sensor
Printing pressure motor
E-44 MSU error
When error signal is received from the MPU board.
MPU
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.
Thermal head HP
sensor
Thermal head driving
motor
E-50 Insufficient NVRAM data
The data in the NVRAM is not the expected data for
this machine (version update error)
NVRAM (MPU)