Sharp AR-810 (serv.man20) Service Manual ▷ View online
AR-651/810 RADF (DOCUMENT FEEDER) 16 - 13
The large original exit solenoid turns OFF when the large original exit motor stops rotating.
(6) Start of 1st original back side registering
The large original exit motor starts to rotate forward. After the large original exit sensor has detected the
leading edge of the original then the original has proceeded a specified distance and been registered, the
large original exit motor stops rotating.
(7) Start of 1st original back side feeding
Both the large original exit and read motors start to rotate forward, and when the leading edge of the
original has come to a specified distance before the read sensor, they start to slow down.
They stop to rotate when the leading edge of the original has reached the read sensor then the original
has been transported a specified distance by the read motor. At the same time, the original stop signal
is set.
(8) Start of 1st original back side scanning
Scanning starts 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 large original exit motor
also starts to rotate forward and the disengagement 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 stops rotating when the disengagement solenoid has turned ON.
AR-651/810 RADF (DOCUMENT FEEDER) 16 - 14
When the leading edge of the original has been transported to the intermediate transport section and
come to a specified distance before the intermediate transport roller, the large original exit motor starts
to rotate in reverse and the small original exit motor also starts to rotate in reverse and the small original
exit solenoid turns ON.
Feeding of the next original starts when the read motor has counted a specified time since the start of
the scanning operation.
The SCN-STR turns OFF when the trailing edge of the original has passed the scanning section. At the
same time, the disengagement solenoid also turns OFF.
The next original reaches the scanning waiting position and stops before the trailing edge of the original
passes the 3rd roller.
(9) Start of 2nd original back side scanning
Scanning begins after receiving the original transport signal from the copier. At the same time the
original stop signal is reset. The read motor starts to rotate forward and the large original exit motor
starts to rotate in reverse.
The SCN-STR turns ON when the leading edge of the original has reached the scanning section, and the
large original exit solenoid turns ON, too. The large original exit motor starts to accelerate when the
trailing edge of 1st original has passed the 3rd roller and traveled a specified distance.
When the leading edge of the original has been transported to the large original exit side and come to
the 3rd roller, the disengagement solenoid turns ON. The large original exit motor starts to slow down
when the trailing edge of 1st original has passed the intermediate transport roller.
AR-651/810 RADF (DOCUMENT FEEDER) 16 - 15
The SCN-STR turns OFF when the trailing edge of the original has passed the scanning section. At the
same time, both the read and the large original exit motors start to accelerate and the disengagement
solenoid turns OFF.
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. The large original exit solenoid turns OFF when
the large original exit motor stops rotating.
(10) Start of 2nd original back side registering
Same operation as (6)
(11) Start of 2nd original back side feeding
Same operation as (7)
AR-651/810 RADF (DOCUMENT FEEDER) 16 - 16
(12) Start of 2nd original back side scanning
Scanning begins after receiving the original transport signal from the copier. At the same time, the
original transport signal turns OFF. When the read motor starts to rotate forward, the large original exit
motor also starts to rotate forward and the disengagement 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
stops when the disengagement solenoid has turned ON.
When the leading edge of the original has been transported to the intermediate transport section and
come to a specified distance before the intermediate transport roller, both the large and small original
exit motors start to rotate in reverse. (The small original exit solenoid has been ON from 1st original.)
Both the SCN-STR and the disengagement solenoid turn OFF when the trailing edge of the original has
passed the scanning section. The large original exit motor starts to accelerate when the trailing edge of
the original has passed the 3rd roller and proceeded a specified distance.
(13) After the original trailing edge has passed the 3rd roller
The large original exit motor stops rotating when the trailing edge of the original has been detected by
the intermediate transport sensor then proceeded a specified distance.
The small original exit motor starts to slow down when the trailing edge of the original has come to a
specified distance before the small original reverse sensor. Then it stops rotating when the trailing edge
of the original has been detected by the small original reverse sensor and proceeded a specified dis-
tance.
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