Ricoh FT5535 Service Manual page 615

SECTION 2
AUTO REVERSE
DOCUMENT FEEDER
DF64 (A663)
The DF64 (A663) ARDF is based on the DF61(A548) ARDF.
Only the differences from the A548 are described in the following
pages. Refer to the A548 ARDF section inside the
A153/A155/A156/A157/A159/A160 copier service manual for other
information.