Canon GP405 - Controlling the Transfer Guide

CHAPTER 6 IMAGE FORMATION SYSTEM
6-14
COPYRIGHT © 1999 CANON INC. CANON 405/335 REV.0 JAN. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
F. Controlling the Transfer Guide
1. Transfer Guide Bias
The transfer guide bias is used to prevent adhesion of toner to the transfer guide, and is negative
in polarity (-400 VDC; toner is also charged to negative polarity).
The transfer guide bias is applied as soon as the control panel power switch is turned on, and
continued until power is removed.
Figure 6-108
Transfer
guide
Photosensitive
drum
DC controller PCB
Image processor PCB
Composite power supply PCB
High-voltage
main transformer
AC power supply voltage input
Serial communication
DC-CPU
PW-CPU
Transformer drive signal
Transformer
drive signal
J103A J209A