Ricoh G108 - ID Sensor; Transfer Belt Sensor; Transfer Belt Sensor and ID Sensor

TRANSFER BELT
G108 6-24 SM
6.6.2 TRANSFER BELT SENSOR AND ID SENSOR
Transfer Belt Sensor
The G108 uses a reflective photosensor called the transfer belt sensor [B], located
below the left side of the transfer belt, to detect belt rotation The transfer belt
sensor first emits light on to the band [A], located on the left end of the transfer belt,
and then receives the reflection from this band.
Since the transfer belt is from contact with the OPC belt ( 6.6.1), the transfer belt
and the OPC belt should have the same rotational speed. However, if the transfer
belt sensor fails to detect this normal rotation of the transfer belt, the message
"Reset PCU Correctly" is displayed.
ID Sensor
This printer uses a reflective photosensor called the ID sensor [C], located below
the right side of the transfer belt, to detect image density. The ID sensor emits light
to the transfer belt and accepts its reflection from a created series of patterns. The
BCU examines the signals from the ID sensor and adjusts the development bias to
maintain the proper image density.
G108D929.WMF
[A]
[B]
[C]