Light Source

This machine uses a CIS (contact image sensor: A4 CIS × 2/front: × 1 and rear: × 1).
When scanning a document using the ADF, the document moves. When scanning a document using the flatbed, the document is fixed and the CIS carriage moves.
The effective scanning width of the CIS is 219 mm, and the scanning resolution is 600 dpi. The sensor of the CIS is made up of 12 chips in a straight line (in-line system). To increase the processing speed, the 12 sensor chips are grouped into sets of 4 and are input parallel to a circuit that has 3 input channels. The 4 sensor chips in each channel will receive inputs as a series .
An LED is the light source of the CIS.