Ricoh DD 4450 Service Manual page 179

Component
ADF Org Exit
ADF Org Feed Cover
ADF Lift Up
SM
Condition
OFF: No
The "P" jam indicator is lit when paper is
reflected
fed-in from ADF.
light
ON:
reflected The "P" jam indicator is lit.
light
OFF: No
The "P" jam indicator is lit when paper is
reflected
fed-in from ADF.
light
Open The "close the ADF cover" indicator is lit.
The original is fed, even if the ADF cover
Shorted is open. Therefore the "P" jam indicator is
lit
The Platen Cover is read even if the ADF
Open
has an original and the ADF is not lifted.
The original is fed, even if the ADF cover
Shorted is open. Therefore the "P" jam indicator is
lit
6-15
Electrical Component Defects
Symptom
C279