Ricoh Ch-C1 Series Service Training page 222

Duplex Scanning (Single-pass)
To the
CCD

A CCD (inside the scanner unit, below the ADF) scans the front side, and
a CIS (inside the ADF) scans the rear side.
 This means that for two-sided scanning, the original feeds though the

The resolution of the CIS is 600 dpi, the same as the CCD.

The white roller below CIS is used as a white reference point
Slide 222
No additional notes
scanner one time only.
222
Ch-C1 Training
CIS