Ricoh A028 Service Training Manual page 141

1 July 1994
4 As the air knife solenoid is operated according to the
number of sheets stacked when duplex stacking is
completed, the number of sheets fed are counted by the
duplex paper feed sensor.
5 The OFF timing of the vacuum solenoid is deter-
mined 0.1 second after determining that all the paper on
the tray has been fed.
6 When using the ADF, the duplex paper feed signal is
generated at a fixed interval after stacking is finished for
the first side copies.
The duplex paper feed signal in the platen mode is
erated at the 413th pulse after the pulse count set to 0
by pressing the Start key again.
gen-
2-105
Duplex and Paper Exit