Ricoh C211 Service Manual page 600

3.
Adjusting The Printing Speed: SS950
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Purpose :
To set the maximum speed at 120 ~ 10 rotations/minute.
Method : 1. Press the Speed Change key to set the speed at the maximum level.
2. Press the reset key while pressing the "O"key and make sure that the
drum rotation speed is 120 * 10 rotations/minute.
3. If not, remove the front cover of the machine and turn on DIP SW 100-6
on the Main Control PCB [A]. Then adjust the speed by turning VRI 00.
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