Drum Charge - Epson ActionLaser 1600 EPL-5600 Service Manual

Operating Principles
Lower Paper Cassette
A maximum of 250 sheets can be loaded in the 250-sheet lower paper cassette (option). The
cassette must be capable of handling the paper size, however. (The lower paper cassette unit can
hold letter or A4 paper.)
The driving force for paper feeding and transport is from the transmission gear. All electrical
controls are performed on the printer side through the coupling comector.
Ca
Paper
Figure 2-4. Paper Feeding from the Lower Paper Cassette

2.1.1.2 Drum Charge

Drum charge is the process of charging the PC drum with static electricity before Iaser exposure.
This printer uses a brush charge method, rather than the corona charge method, to charge the
drum. In the brush charge method, there is no generation of ozone as a result of corom discharge.
This method also allows the drum to be charged at a low voltage, because a direct electric load is
applied to the PC drum.
I
Charged surface:
PC Drum
2-4
GND B
-
T
to
Figure 2-5. Drum Charge
Imaging Cartridge
A: Drum Charge Bias B: Drum Ground
C: Developing Bias D: Doctor Blade Bias
te
Rev. A