Sharp AR-651 (serv.man19) Service Manual ▷ View online
AR-651/810 RADF (DOCUMENT FEEDER) 16 - 45
(5) Control for separation
YES
NO
A
Control for Separation started
Lifting tray up
Lifting tray down
Feed motor forward rotation
1
YES
Original length sensor ON?
NO
Lifting tray up completed?
YES
NO
A
Feed motor forward rotation
Feed motor stopped
2
YES
NO
1
Registration sensor OFF?
Registration sensor ON?
YES
Feed motor stopped
YES
2
Pre-feeding control from
registration roller started
Pre-feeding trailing edge
control started
Control for Separation completed
YES
NO
NO
Registration sensor ON?
NO
Specified pulse passed?
From original length sensor ON,
specified pulse passed?
AR-651/810 RADF (DOCUMENT FEEDER) 16 - 46
(6) Control for pre-feeding from registration roller
YES
Feed motor reverse rotation
YES
Read motor forward rotation
YES
Pre-feeding control
from the 1st roller started
Control for pre-feeding from
registration roller started
NO
Feed acceptable?
NO
Feed motor acceleration
completed?
NO
Reached the 1st roller?
NO
First copy?
YES
Read motor stopped
YES
Size detected
Control for leading edge
scanning started
Control for pre-feeding from
the 1st roller started
NO
Read sensor ON?
NO
Specified pulse passed?
NO
YES
Size detection succeeded?
Reversal without reading started
YES
Control for pre-feeding
from registration roller completed
Control for pre-feeding
from the 1st roller completed
AR-651/810 RADF (DOCUMENT FEEDER) 16 - 47
(7) Trailing edge control for pre-feeding
YES
Feed motor stopped
Original length data acquired
Next original detection started
Trailing edge control
for pre-feeding started
NO
YES
YES
A
Feed motor stopped
1
YES
NO
1
YES
NO
Registration sensor OFF?
Small original?
Next original detection started
Trailing edge control
for pre-feeding completed
NO
Small original?
NO
Midpoint between registration
roller and the 1st roller passed?
Original trailing edge passed
original length sensor?
AR-651/810 RADF (DOCUMENT FEEDER) 16 - 48
(8) Control for next original detection
YES
Control for next original
detection completed
Next original separation started
YES
Lifting tray up
Control for next original
detection started
NO
Specified time passed?
NO
YES
Lifting tray down
Next original?
NO
Lifting tray up completed?
NO
Lifting tray down completed?
YES
YES
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