Ricoh DD 4450 Service Manual page 175

Component
Scanner HP Sensor
Original Length / Width Sensor
Master Set Cover Sensor
Master End Sensor
Paper Height Sensor
SM
Condition
Depending on the set paper when a master
No
is made in this state, there may be a size
reflected
disagreement warning, auto rotation or
light
Reduce/Enlarge.
E-13 is displayed when scanner HP is
Open
running.
E-13 is displayed when the start button is
Shorted
pushed and the scanner returns to HP.
ON The correct original size is undetectable if
original does not match the sensor pattern
of the original size.
Depending on the set paper when a master
OFF
is made in this state, there may be a size
disagreement warning, auto rotation or
Reduce/Enlarge
The "D" jam indicator is lit and cannot be
Open
canceled.
The "D" jam indicator is lit when the Master
Shorted
Set Cover is open.
The "D" jam indicator is lit when there is no
master. The Jam LED is on. Cannot detect
There is a
Master End. Roll-up jam, image, solid
master on
image, dirty press roller occurred when the
the drum.
master was torn off the master roll and it
was twisted around the drum.
The "load new master roll" indicator is lit
No master
and the "load new master roll" LED is on.
The paper table goes up over the sensor,
Open
and E-02 is displayed
The "A" jam indicator is lit whenever a copy
Shorted
is made.
6-11
Electrical Component Defects
Symptom
C279