Toshiba e-studio 167, Service Manual, Page: 64 / 268

e-STUDIO167/207/237 © 2007 - 2008 TOSHIBA TEC CORPORATION All rights reserved
COPY PROCESS
3 - 10
7) Separation
Separation is the process of separating paper which is temporarily adhering to the drum due to the
static electricity during the transfer process.
- Output is controlled as follows to realizes the desirable separability.
Paper may not be separated from the drum surface because of moisture or malfunction of the
transfer/separation charger during printing. As the result, the paper enters into the cleaner and
causes jamming. To prevent this, a separation finger is used to forcibly separate the paper which
was left around the drum.
Fig. 3-18
Method: Apply negative DC bias to the separation
charger.
The positive charge on the paper is decreased.
The electrostatic adherence force between the
paper and drum becomes weak.
The paper is separated from the drum by its
own stiffness.
Fig. 3-17
Paper position against transfer point Separation output
From leading edge to 11mm from leading edge (H) -107 µADC
From 11mm from leading edge to 46mm from leading edge (L) -70 µADC
From 46mm from leading edge to 48mm from trailing edge (C) -107 µADC
From 48mm from trailing edge to trailing edge (L) -70 µADC
Separation charger
Direction of
transportation
Drum
rotation
Separation
charger
Paper
movement
Drum rotation
Separation finger