Ricoh DD 4450 Service Manual page 173

Component
2nd Feed Timing Sensor
Drum Sensor (connecter)
Drum Ink Sensor (Detection
pin)
Drum Ink Temperature Sensor
(Harness)
Pressure Plate Limit Sensor
Pressure Plate HP Sensor
Drum Master Sensor
SM
Condition
Open E-22 is displayed whenever the drum
rotates.
Shorted
No display even if the drum is extracted and
Connect E-06 is displayed when printing or master
making.
"No drum" is displayed when initialization
OPEN
is finished.
The print images blur because the ink pump
ON
is not ON.
"Ink end" is displayed when printing or
master making, and cannot be canceled.
No Ink LED is on.
OFF
Ink leak occurs in the drum because ink
supply is performed every time the door is
door opened and closed.
E-17 is displayed whenever the start button
Shorted
is pushed.
Wire E-18 is displayed whenever the start button
Snapping is pushed.
Open "Master eject is full" is displayed.
Shorted E-12 is displayed.
Open E-12 is displayed when the pressure plate
is activated.
Shorted
There is a The master eject does not occur and the
master on "D" jam indicator is lit whenever a master is
the drum. made.
6-9
Electrical Component Defects
Symptom
C279