Controlling The Primary/Transfer Corona Current - Canon NP6330 Service Manual

CHAPTER 4 IMAGE FORMATION SYSTEM

2. Controlling the Primary/Transfer Corona Current

The primary/transfer corona current ON signal (PTON) from the DC controller is used
to turn on and off the primary/transfer corona current output.
• When the primary/transfer corona current output is on,
PTON*=0
The remote circuit turns on.
The AC drive circuit turns on.
• When the primary/transfer corona current output turns off,
PTON*=1
The remote circuit turns off.
The AC drive circuit turns off.
Reference:
The copier turns on and off the primary and transfer corona currents at the same
time. The application voltage, on the other hand, is about -5.7 kV for primary, and
about -5.6 kV for transfer.
4-6
The primary high-voltage transformer turns on. (primary charging
corona current output)
The transfer high-voltage transformer turns on. (transfer charging
corona current output)
The primary high-voltage transformer turns off.
The transfer high-voltage transformer turns off.
COPYRIGHT © 1997 CANON INC. CANON NP6330 REV.0 MAY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)