Registration Unit - Canon iR4570 Series Service Manual

8.6 Registration Unit

8.6.1 Overview
iR2270 / iR2870 / iR3570 / iR4570
The registration roller is driven by the main motor (M2).
In between the registration roller and the main motor is the registration clutch (SL2), servicing to turn on and off the
registration roller so that the paper will be matched in relation to the image on the drum at correct registration.
8.6.2 Checking Horizontal Registration
iR2270 / iR2870 / iR3570 / iR4570
The machine does not have a mechanism to check horizontal registration for both 1st and 2nd sides of a print. The
point of horizontal registration for the 2nd side may be adjusted in service mode (i.e., the image write start position).
The degree of arching for registration on the 2nd side of a double-sided print must be adjusted separately from the
adjustment for the 1st side to accommodate the fact that different feed paths are used up to the registration roller for
1st and 2nd sides.
Service Mode:
COPIER>ADJUST>FEED-ADJ>ADJ-REFE
Use it to adjust the horizontal registration for the 2nd side of small-size double-sided prints.
DC controller PCB
CL2
F-8-40
Chapter 8
0007-2213
M2
0007-2214
8-45