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OPERATIONS AND TIMING
COPYRIGHT
©
1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
4. Detecting Paper in the Deck
a. Identifying the Size of Paper
You must set the switch (SW1) on the deck size
switch PCB to suit the size of paper set inside the
paper deck.
When you set the switch, the paper size signal
(SIZE1 and SIZE2) sent to the pedestal controller
PCB changes to ‘1’ or ‘0’.
Based on the combination of these paper size
signals, the pedestal controller PCB identifies the
size of the paper inside the paper deck as follows:
*The configuration of SW 1 represents when the
switch is viewed from the front.
Table 2-401
b. Identifying the Presence/Absence of Paper
The presence and absence of copy paper inside
the paper deck is identified by the deck paper
sensor (PS1).
When the paper deck runs out of paper, the
paper detecting spacer attached to the pick-up
roller shaft drops.
As a result, the paper detecting lever leaves the
deck paper sensor (PS1), causing the pedestal
controller PCB to identify the absence of paper.
Paper detecting spacer
Paper detecting lever
Paper sensor (PS1)
Lifter
Figure 3-436
Paper detecting spacer
Paper detecting lever
Paper sensor (PS1)
Lifter
Figure 3-437
Paper size* SIZE 1 SIZE 2
B5 1 2
A4 0 1
LTR 1 0
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