Correcting Image Displacement; Outline - Canon iR C3200 Series Service Manual

Front cover switch
Manual feed unit
open/closed switch
Fixing feeder unit
open/closed switch

8.3.5 Correcting Image Displacement

8.3.5.1 Outline

The following factors can displace images of individual colors:
- displacement of the photosensitive drum caused by replacement of the drum unit/toner container
->displacement in sub scanning direction
- displacement of laser path caused by replacement of laser unit
->displacement/angle in main scanning direction
- displacement in laser path length caused by changes in temperature inside machine
->variation in magnification
To correct the discrepancies in images, the machine executes corrective control for image position; it detects
displacement in color by forming a pattern of a specific color on the transfer belt and reading it against the correct
position.
DC power
supply unit
Front cover
open/closed sensor
PS23
Manual feed unit
open/closed sensor
PS28
Fixing feeder unit
open/closed sensor
PS5
PWMIC Control IC
DC controller PCB
F-8-12
Chapter 8
0000-4464
8-11