Sharp AR-810 (serv.man20) Service Manual ▷ View online
AR-651/810 RADF (DOCUMENT FEEDER) 16 - 29
The large original exit motor starts to slow down when the trailing edge of the original has proceeded a
specified distance after passing the 4th roller. 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 original is nipped by the large original
exit roller.
(5) Start of back side registering
Same operation as 16.5.2.(6)
(6) Start of back side feeding
Both the large original exit and read motors start to rotate forward. After the leading edge of the
original has reached the read sensor and been transported a specified distance by the read motor, the
disengagement solenoid turns ON. Then the large original exit motor stops rotating.
The large original exit motor starts to rotate in reverse after the original has been transported to the
large original exit and the leading edge of the original has reached the 3rd roller.
The large original exit motor starts to slow down when the trailing edge of the original has proceeded a
specified distance after passing the 4th roller. 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 original is nipped by the large original
exit roller.
AR-651/810 RADF (DOCUMENT FEEDER) 16 - 30
(7) Back side registering to set the top side
Same operation as 16.5.2.(6)
(8) Start of top side feeding
Same operation as 16.5.2.(7)
(9) Start of scanning
Scanning begins after receiving the original transport signal from the copier, and at the same time, the
original stop signal is reset. The read motor starts to rotate foward and so does the large original exit
motor. Then the disengagement solenoid turns ON. (The large original exit solenoid has been ON since
the original was idle reversed.)
The SCN-STR turns ON when the leading edge of the original has reached the scanning section. When
the leading edge of the original is transported to the large original exit and reaches the 3rd roller, the
large original exit motor starts to rotate in reverse.
When the trailing edge of the original has passed the scanning section, the SCN-STR turns OFF, and at
the same time, both the read and large original exit motors start to accelerate. Then the disengagement
solenoid turns OFF.
With a next original, feeding of the original begins when the trailing edge of the original has passed the
4th roller.
AR-651/810 RADF (DOCUMENT FEEDER) 16 - 31
The large original exit motor starts to slow down when the trailing edge of the original has proceeded a
specified distance after passing the 4th roller. At the same time, the read motor stops rotating unless
there is a next original.
The large original exit motor stops rotating when the trailing edge of the original has proceeded a speci-
fied distance after being detected by the large original exit sensor. Then the original is discharged.
If this is the last original, the operation ends when the large original exit solenoid turns OFF.
AR-651/810 RADF (DOCUMENT FEEDER) 16 - 32
16. 6. Jams
16. 6. 1. Jams at feeding section
(1) Original jammed not reaching the original length sensor
• Jam detection
This jam is detected during the time after the feed motor begins to rotate forward to start
separation until an original reaches the original length sensor.
• Jam timer setting
The setting value for the jam timer is three times as much time as it takes to transport an original
from the pickup position (where the empty sensor detects the original) to the original length
sensor.
(2) Original jammed not reaching the registration sensor
• Jam detection
This jam is detected during the time after an original comes to the position 10mm short of the
registration sensor (24.6mm further from the original length sensor) until it reaches the registration
sensor.
• Jam timer setting
The setting value for the jam timer is three times as much time as it takes to transport an original
from the middle position between the original length sensor and registration sensor to the
registration sensor.
16. 6. 2. Jams at transporting section
(1) Original jammed at the original length sensor
• Jam detection
This jam is detected during time after the feed motor starts to rotate in reverse so that the
registration roller starts to transport an original to the read roller until the trailing edge of the
original passes through the original length sensor.
• Jam pulse setting
The setting value for the jam pulse is the equivalent number of pulses it takes for the longest
original (LD) to pass through the original length sensor and proceed more 60mm.
(2) Original jammed at the registration sensor
• Jam detection
This jam is detected during the time after the original passes through the original length sensor
until it passes through the registration sensor.
• Jam pulse setting
The setting value for the jam pulse is the equivalent number of pulses it takes for an original to
proceed the distance from the original length sensor to the registration sensor plus 60mm.
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