DRUM UNIT
B234/B235/B236/D101/D102/D103 6-66 SM
6.11.3 DRUM CHARGE
Overview
This copier uses a corona wire Scorotron system to charge the drum.
Unit
Pre-Charge Corona [A] Charge Corona [B]
Corona Wire Single Double
Grid Plate Plate
Power pack PPG Power pack [C] CGB Power pack [D]
Charge current
(Text, Text/Photo
Pale, Generation Copy)
Constant: 600 µA Constant: 1,550 µA
Charge current (Photo mode)
Constant: 600 µA Constant: 1,600 µA
Grid voltage Not controlled - 900 V
Corona wire cleaning Manually Automatic mechanism
This is a high-speed copier, so two corona wires are needed inside the charge
corona unit [B] to give a sufficient, uniform negative charge to the drum surface.
The stainless steel grid plate makes the corona charge uniform and controls the
amount of negative charge on the drum surface by applying a negative voltage to
the grid.
B234D203.WMF
[A]
[B]
[C]
[D]
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