Noise At Time Of Pickup From The Cassette - Canon iR4570 Series Service Manual

Chapter 14
[ Inspected by Canon Inc. ]
Field Remedy
In inspection, reinsertion of the ROM corrected the symptoms. If any of the symptoms mentioned above occurs
during installation, reinsert the BOOTROM or the RAM.
14.2.2.2 Noise

14.2.2.2.1 Noise at Time of Pickup from the Cassette

0007-7052
iR2270 / iR2870 / iR3570 / iR4570
<Cause>
When double-feeding occurs at time of pickup, the contact between the sheets and the feed roller and the separation
roller cause the separation roller assembly to vibrate.
<Field Remedy>
Replace the roller with a sponge retard roller (FB5-0873; to be used as needed; cassette only).
14-17