Sharp AR-810 (serv.man20) Service Manual ▷ View online
AR-651/810 RADF (DOCUMENT FEEDER) 16 - 17
The small original exit motor starts to rotate forward. Then it starts to slow down with a specified time
delay after the small original reverse sensor has detected the leading edge of the original.
The small original exit motor stops rotating when the trailing edge of the original has been detected by
the small original exit sensor then proceeded a specified distance. The small original exit solenoid turns
OFF and the operation ends when the original has been discharged.
AR-651/810 RADF (DOCUMENT FEEDER) 16 - 18
16. 5. 3. A4 single-sided feeding
(Operational condition: A3 original/Reproduction ratio: 100%)
(1) Original setting
Same operation as 16.5.1.(1)
(2) Lifting of the lifting tray
Same operation as 16.5.1.(2)
(3) Start of separating
Same operation as 16.5.1.(3)
(4) Start of feeding
The feed motor starts to rotate in reverse. When the feed motor has completed acceleration, the read
motor starts to rotate forward. Both the feed and read motors start to slow down when the leading edge
of the original has come to a specified distance before the read sensor.
They stop rotating and the original stop signal turns ON when the leading edge of the original has been
detected by the read sensor then proceeded a specified distance.
AR-651/810 RADF (DOCUMENT FEEDER) 16 - 19
(5) Start of 1st original scanning
Scanning begins after receiving the original transport signal from the copier. At the same time the
original stop signal is reset. When the read motor starts to rotate forward, the feed motor also starts to
rotate in reverse and the large original exit solenoid turns ON. The SCN-STR turns ON when the leading
edge of the original has reached the scanning section.
The large original exit motor starts to rotate in reverse when the leading edge of the original has been
transported to the large original exit side and come to the 3rd roller.
When the registration sensor has detected the trailing edge of the original, the feed motor stops rotating
and the tray lift motor starts to rotate to lift the tray. The tray lift motor stops rotating when a specified
number of counts is counted after the upper limit sensor has detected the top side of the original.
The empty sensor detects whether or not there is a next original when a specified time passes after the
registration sensor has detected the trailing edge of the original. With a next original, separating of the
next original begins.
When the trailing edge of the original has passed the scanning section, the SCN-STR turns OFF and
both the read and large original exit motors start to accelerate.
Feeding of 2nd original begins when the trailing edge of the original has passed the 4th roller.
AR-651/810 RADF (DOCUMENT FEEDER) 16 - 20
When the trailing edge of the original has passed the 4th roller then proceeded a specified distance, the
large original exit motor starts to slow down. After the large original exit sensor has detected the trailing
edge of the original, the read motor stops rotating soon and the large original exit motor stops rotating
when the original has proceeded a specified distance. Then the original is discharged.
Both the read and feed motors stop when 2nd original has reached the scanning waiting section.
(6) Start of 2nd original scanning
Scanning begins after receiving the original transport signal from the copier. At the same time the
original stop signal is reset. When the read motor starts to rotate forward, the feed motor also starts to
rotate in reverse. (The large original exit solenoid has been ON from 1st original.)
The SCN-STR turns ON when the leading edge of the original has reached the scanning section.
The large original exit motor starts to rotate in reverse when the leading edge of the original has been
transported to the large original exit side and come to the 3rd roller.
When the registration sensor has detected the trailing edge of the original, the feed motor stops rotating
and the tray lift motor starts to rotate to lift the tray. The tray lift motor stops rotating when a specified
number of counts is counted after the upper limit sensor has detected the top side of the original.
The empty sensor detects whether or not there is a next original when a specified time passes after the
registration sensor has detected the trailing edge of the original. If not, the tray lift motor starts to rotate
to lower the tray and the original set signal turns OFF. The tray lift motor stops rotating when the lower
limit sensor has detected the tray.
When the trailing edge of the original has passed the scanning section, the SCN-STR turns OFF and
both the read and large original exit motors start to accelerate.
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