Canon GP215 Service Manual page 169

b. Operations
The home position of the horizontal registration sensor (PS14) is checked when 24 VDC is supplied
(i.e., when the front cover is closed after power-on), and the movement is started when paper is stacked
in the lower feeding assembly at detection start position.
When the copy paper picked up from the lower feeding assembly reaches the vertical path paper sen-
sor (PS8), the horizontal registration motor (M9) turns ON and the horizontal registration sensor (PS14)
operates to check the edge of the paper. (The detection is executed each time paper is picked up from the
lower feeding assembly.)
Detection start position differs for each copy paper; ideally, it is set to a point about 10 mm from the
edge of the paper being moved. (The factors determining the detection start position are the cassette size
and the slide guide of the multifeeder assembly.
Figure 3-635 shows the sequence of operations for rear/front registration detection.
Set-back roller
motor (M6)
Re-pick up flapper
solenoid (SL4)
Lower feeding assembly
re-pick up clutch (L5)
Re-pick up front
paper sensor (PS11)
Vertical path paper
sensor (PS8)
Vertical path roller
clutch (CL3)
Horizontal registration
motor (M9)
Horizontal sensor
(PS14)
Horizontal
sensor (PS14)
Edge of paper
1: The set-back roller motor may turn ON/OFF depending on the copy count.
2: The re-pick up flapper solenoid may turn ON depending on the copy count.
3: The re-pick up sensoer may turn ON/OFF during set-back operation depending on the
copy count
4: The edge of the paper is detected; a checkis made when the light-blocking plate is away.
5: The paper edge position differs depending on copy paper size, making SP different.
HP: Home position of the horizontal registration sensor.
SP: Detection start position of the horizontal sensor.
COPYRIGHT © 1996 CANON INC.
Main power ON
INTR/STMB
Reverse
H.P
S.P
*4
Figure 3-635
CANON GP215/200 REV.0 JULY 1996 PRINTED IN JAPAN (IMPRIME AU JAPON)
Re-pick up start
PFR
*1
CW CCW
*2
*3
Forward Forward
10mm(approx.)
3. OPERATIONS AND TIMING
Reverse
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