Ricoh FT4460 Service Manual page 300

28 February 1989
9. Remove the DIP switch cover [A] and turn switch 1 - 4 ON.
10. Press the numeric keys in the above sequence (SP Mode #66) in order to
initialize the drum counter and measure the amount of residual voltage on
the drum surface.
NOTE: After the keys are pressed, and the beeper sounds five times.
11. Turn DIP switch 1 - 4 OFF.
NOTE: The drum counter must be reset by SP Mode #66 whenever an
OPC drum is replaced.
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