Ricoh FT4480 Field Service Manual page 124

Il. CHARGE CORONA
OPTIMUM ADJUSTING VALUE: DC +42.4 ± 0.2 µA
1. Slide the drum shoe [A] to its rear limit as shown (X)
Position the drum shoe so that the axis of the current sensing plate is
2.
aligned with the charge corona wire as shown.
3. Reinstall the drum stay (1 screw and 1 knob) and the charge corona
unit.
4. Select the dc 200 µA range of the digital multimeter [B].
5. Turn on SW 8 of the switching board.
6. Turn on the main switch and note the reading. (Wait 30 seconds for
the current to stabilize.)
7. Turn off the main switch, move the drum shoe to the front as shown
(Y), and repeat steps 3 to 5.
3-73
15 MARCH 1987