Drum Drive; Charge Corona Unit; Corona Wire Cleaning - Ricoh B010 Service Manual

6.4.2 DRUM DRIVE

The drum drive motor [A] drives the OPC
drum [B] through gears, a timing belt, and
the drum drive pulley [C].
The drum drive motor only drives the
drum.

6.4.3 CHARGE CORONA UNIT

The charge corona unit [A] comprises one
gold-plated charge wire (φ80 µm) and 10
grid wires, and employs the Scorotron
(Negative) Charge Method !.
About –6.0 kV are applied to the charge
wire, to achieve a –850V charge on the
grid wires. Charge passing between the
grid wires brings the charge on the
surface of the drum to –900V.

6.4.4 CORONA WIRE CLEANING

The charge corona wire has an automatic
cleaning device. After 600 m of paper has
passed though the machine or the current
copy job ends, the wire cleaner [A] cleans
the wire.
The wire cleaner motor [B] drives the
cleaner.
The interval between automatic charge
wire cleanings can be adjusted with
SP2804.
SM
[B]
[C]
[A]
[B]
[A]
[A]
6-23
AROUND THE DRUM
B010D201.WMF
[A]
B010D202.WMF
B010D207.WMF
B010