Canon BJC6500 - BJC 6500 Color Inkjet Printer, Service Manual, Page: 92 / 115

1.2 Construction of the Paper Feed Unit
The BJC-6500's paper feed unit is comprised of the paper pick-up unit, paper feed unit,
and the paper eject unit. Its' construction is different from that of the BJC-6100, as
explained below.
a) Pick-up unit
The pick-up unit of this printer is comprised of the pick-up roller, pick-up guide, the
angled ASF face, and two pick-up separators.
The pick-up separators are connected to the paper selector lever, and depending on the
position of the paper selector lever's setting, the pick-up separators can be raised or
lowered.
When paper is stacked in the ASF, in order to prevent misfeeding due to bending of the
paper, the angled face of the ASF is used to hold the paper in the place.
For print media such as plain paper, both corners of the media are held down by the
pick-up separators, causing slight bending of the paper to separate the sheets, and the
media is fed through to the paper feed rollers one sheet at a time.
If the paper is a resilient type, such as envelopes and thick paper, it pushes the paper
separator over, and due to the angled face of the ASF, is fed one sheet at a time.
While this construction provides better feeding performance, if the paper selector lever
is incorrectly positioned, misfeeding or multi-feeding can occur. For details, refer to
Part 1: 2.2.2 Paper type/settings (Page1-4)
Part 5: REFERENCE BJC-6500
5-2
Envelope/Postcard Feeding
(paper selector lever-forward)
Plain Paper Feeding
(paper selector lever-back)
Pick-up Guide
Stacked Paper
Pick-up Separator
Pick-up Roller
Paper
Angled ASF Face
Figure 5-2 Paper Pick-up Unit