Specifications

4.4.2 Charge Roller Contact Mechanism
To prevent toner from adhering to the drum charge roller and to prevent the
drum charge roller from sticking to the drum, the drum charge roller contacts
the drum only under the following conditions:
•
When the image processing area comes under the drum charge roller
•
During charge roller cleaning
This function is performed by the charge roller contact clutch [A] (a one-third
turn clutch) charge roller H.P. sensor [B], and cam [C] located at the end of
the clutch shaft. When the clutch is driven one third of a complete rotation,
the pressure lever [D] riding on the cam presses down the drum charge roller
unit [E] to contact the roller with the drum.
When the drum charge roller contacts the drum, the drum charge roller is
turned by the drum.
The following table shows the relationship between the clutch rotation and
each processing mode.
Mode Copying Cleaning (see next
page)
Home Position
Clutch 1/3 turn 1/3 turn 1/3 turn
Charge Roller
Position
Charge Roller
Contact H.P. Sn
OFF OFF ON
[C]
[D] [E]
A193D014.wmf
[A]
[C]
[D]
[E]
[B]
A193D543.wmf
1 August 1996 PCU (PHOTOCONDUCTOR UNIT)
2-27