Epson GT-1200, Service Manual

Page: 92 / 157

ADF Operating Principles
Rev. A
2-7
5. When the paper eject/reverse sensor comes on, the transportation
motor stops and then the paper eject/reverse motor stops to hold the
document in the paper eject/reverse mechanism.
6. The transportation motor rotates backward and then the paper
eject/reverse motor rotates forward to transport the document from
the paper eject/reverse mechanism to the scanning position on the
platen glass. The paper eject/reverse motor stops when the paper
eject/reverse sensor goes off. When the document bumps against the
paper stopper, transportation motor stops and the flapper solenoid
goes off to stop transporting the document. With the document set for
scanning, the ADF sends the paper feeding complete signal to the
scanner, and the scanner starts scanning.
7. The paper feed motor starts rotating forward to pick up and transport
another document from the paper feed tray. The motor stops when
the registration sensor comes on.
8. After the registration operation is carried out, the paper feed motor
rotates forward to transport the pre-fed document to the position
where the timing sensor comes on. The pre-feeding operation is
complete when the ADF sends the operation complete signal to the
scanner.
Figure 2-23. Reverse Feeding (Step 5)
Figure 2-24. Reverse Feeding (Step 6)
Figure 2-25. Reverse Feeding (Step 7)
Figure 2-26. Reverse Feeding (Step 8)