Ricoh Aficio FX10 Operator's Manual page 123

TECHNICAL REFERENCE User Parameters (function 63)
El
To change bit 3, press 3 on the
key pad. Bit 3 will change from 1
to Oorfrom Otol.
(To change bit O, press O, to
change bit 1, press 1, and so on.)
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,
Press Yes and Function.