User Guide

F. Controlling the Transfer Guide/Fixing Roller Bias
1. Transfer Guide Bias
The transfer guide bias is used to prevent adhesion of toner to the transfer guide and has a negative
potential (–600 VDC) as in the case of toner.
The application continues as long as the control panel power remains ON.
2. Lower Fixing Roller Bias
A positive component is applied to the steel core of the lower fixing roller to prevent offset to the fixing
film.
The terminal on the lower fixing roller shaft is for this purpose; pay attention to the orientation of the
lower roller if you have removed it.
3–69
COPYRIGHT © 1996 CANON INC. CANON GP215/200 REV.0 JULY 1996 PRINTED IN JAPAN (IMPRIME AU JAPON)
3. OPERATIONS AND TIMING
Figure 3-508
T101
Composite power supply PCB
T101
drive
circuit
DC controller PCB
Fixing
assembly
Photosensitive
drum
Transfer
guide
T101 drive signal Fixing bias ON signal
Serial communication
J209-A4~A9
J102-A4~A7
IC101
CPU
Q605
CPU