Ricoh DD 4450 Service Manual page 253

SP Table
Ink detection adjustment
With no ink drum, the drum and adjust VR to adjust the display to be 6.7(6.7us).
When the drum has ink inside, the machine displays "----".
Before running this mode, please wipe off the ink around the ink roller.
Before attempting this procedure, wipe off the ink around the ink roller. To
do this, set
SP2-10 (ink detection) to OFF, and feed paper until ink ends.
After finishing the procedure, do not forget to return SP2-10 to the default
(ink detection on)
6-40
Access SP6-40, and open the door cover. Then turn VR1 on the ink detection
board until the display becomes "3.0 u" (3 us).
6-50 Master end sensor voltage
6-51 Master edge sensor voltage
6-52 Duct jam sensor voltage
6-53 2nd drum master sensor voltage
C279
[0.5 to 3.5 / 1.90 / V]
[1.5 to 3.5 / 2.80 / V]
[0.5 to 3.5 / 2.00 / V]
[0.5 to 3.5 / 1.00 / V]
34 SM Appendix