Ricoh DD 4450 - ADF Sensor Malfunctions and Symptoms

Electrical Component Defects
C279 6-14 SM
Component Condition Symptom
Thermal Head HP Sensor increase
the
pressure
E-47 is displayed.
release
the
pressure
Thermal Head Temperature
Sensor
Open
E-09 is displayed whenever the start
button is pushed.
Shorted
E-04 is displayed whenever the start
button is pushed.
ADF Original Detection
Open
The original is fed even if the ADF does
not have an original. Therefore the “P”
jam indicator is lit
The Jam LED is ON. The machine cannot
shift to the energy-saving mode at the
correct time.
Shorted
The Platen Cover is scanned even if the
ADF has an original
Even if the original is set in the ADF in
energy-saving mode, it cannot return from
energy-saving mode.
ADF Skew Correction
ON:
reflected
light
The “P” jam indicator is lit.
OFF: No
reflected
light
The “P” jam indicator is lit when paper is
fed-in from ADF.
ADF Registration
ON:
reflected
light
The “P” jam indicator is lit.