Ricoh K-C3.5L Service Training page 133

For details regarding component layout, the
functions of the components, and overall
operation of the document feeder, refer to the
ARDF DF2010 Service Manual.
Go to your machine and find the components in
the diagrams.
Slide 133
More on Electrical Components
Note the functions of the following components:
Trailing edge sensor: During one-to-one copying, copy paper is fed to the
registration roller in advance, to increase the copy speed. This sensor
monitors the stack of originals in the feeder, and detects when the trailing
edge of the last page has been fed in. This stops the copier from feeding an
unwanted extra sheet of copy paper.
Original reverse sensor: Detects paper coming back from the reverse tray in
double-sided original mode
The original width sensor uses an electrode plate, with terminals attached
to the document guides. The sensor output changes when the user slides
the guides to match the document width. Of course, this means that the
wrong width will be detected if the user doesn't position the guides
correctly.
The DF position sensor only detects when the DF is opened. The platen
cover sensor triggers the APS sensors.
Electrical Components
133
Model K-C3.5L