Ricoh FT5580 Service Manual page 132

Example: Motor speed = 2,612 rpm
When SW 101 is not pressed, "26" is displayed.
When SW 101 is pressed, "12" is displayed.
6. Adjust the motor speed to 2,600 ± 30 rpm by turning VR103 on the
DF main board.
7. Turn off the main switch, return DIP SW 101 to the normal position,
and reassemble. (All switches are off.)
5-9
12 June 1987