Epson GT-1200 Service Manual page 88

ADF
5. The document is transported until the rear edge passed the
document stopper, then the transportation motor stops rotating.
6. The transportation motor rotates backward to move the document
back until it bumps against the paper stopper, and the motor stops.
With the document aligned with the stopper, paper skew is corrected
and the document is ready to be scanned. The ADF sends the paper
feeding complete signal to the scanner.
7. While scanning is proceeding, the paper feed motor starts rotating
forward to pick up and transport the document. 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 document to the position where the
timing sensor comes on, and the pre-feeding operation is done. Then
the ADF sends the operation complete signal to the scanner.
Rev. A
10 mm
Figure 2-6. Single Feeding (Step 5)
Figure 2-7. Single Feeding (Step 6)
Figure 2-8. Single Feeding (Step 7)
Figure 2-9. Single Feeding (Step 8)
Operating Principles
2-3