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MX-M700N TRANSFER SECTION M – 2
2. Operational descriptions
A. Outline
In this section, toner images on the OPC drum are transferred to
paper.
B. Description
1)
Toner image transfer
Toner images formed on the drum by the developing roller are
transferred to paper by the transfer belt.
Toner on the drum is negatively charged by stirring in the
developing unit. By applying a positive voltage to the transfer
roller, the transfer belt and paper on the transfer belt are posi-
tively charged to transfer negatively charged toner images to
paper.
2)
Transfer belt cleaning
During the job, a positive voltage is applied to the transfer
cleaning roller so that negatively charged toner on the transfer
belt is attracted to the cleaning roller.
(The brush on the back of the transfer belt is provided for
increasing the cleaning effect.)
After completion of the job, the applied voltage to the transfer
cleaning roller is switched to negative, and toner is returned
from the transfer cleaning roller to the transfer belt, and toner
on the transfer belt is attracted to the drum and cleaned by the
cleaning blade.
Cleaning timing:
After completion of the job, When warming-up, After canceling
a jam, After execution of process control
3)
Transfer belt separation/contact
Transfer belt is separated by the transfer separation motor.
The transfer belt is in contact with the drum except for the fol-
lowing cases.
The case that the transfer belt is separated from the drum
except:
* When executing process control (to prevent against break-
age of toner patch on the drum)
* When a jam occurs (Protection of the drum, left door open/
close)
* When shipping (Protection of the drum. Separate with the
simulation 6-1 (7).)
-2.0kv
2.0kv
10
Ω
8
-100v
AC4.5kv
1.0 - 1.5kv (35
μ
A)
(55ppm, 62ppm)
2.0 - 2.5kv (40
μ
A)
(70ppm)
Cleaning roller
cleaning mode
Cleaning roller
cleaning mode
Transfer belt
cleaning mode
Transfer mode
-2.0kv
2.0kv
-2.0kv
-100v
AC4.5kv
2.0kv
(35
μ
A)
1.0~1.5kv
10
Ω
8
(40
μ
A)
2.0~2.5kv
70ppm
55ppm
62ppm