Functional Operation - Ricoh FT5034C Service Manual

6. FUNCTIONAL OPERATION

6.1 SUMMARY
When an original is inserted face-up into the ADF, the insert original indicator goes
off.
When the Start key is pressed, the pick-up roller starts turning and advances the
bottom original of the stack.
The feed roller and the friction belt are used to feed-in and separate the originals.
Only the bottom original is fed because the friction belt prevents any other originals
from feeding.
Registration rollers feed the original to the transport belt until slightly after the original
trailing edge passes the registration sensor. Then the motor pauses and reverses for
a few pulses. This forces the original against the left scale and thus aligns the edge
of the original with the scale.
When the scanner reaches the return position at the end of scanning the original,
the original is fed out from the ADF.
6.2 ORIGINAL PICK-UP
6.2.1 Original Pick-up
When an original is inserted, the insert original indicator goes off. When the Start key
is pressed, the ADF motor and the feed-in clutch are energized. Then the feed roller
starts turning.
The feed roller and the pick-up roller (a D-shaped roller) are linked by a timing belt.
Therefore the pick-up roller starts turning and advances the bottom original while the
clutch is on.
A spring plate is installed above the pick-up roller. This plate pushes down the
original stack against the pick-up roller to help the roller feed the bottom original.
Friction Belt
Registration
Sensor
Registration
Roller
• SEPARATION
Original Set Sensor
Feed Roller
Left Scale
- 9 -
• FEED-IN MECHANISM
Friction Pad
Spring Plate
Pick-up Roller Position
Sensor
Transport Belt
Pick-up Roller