Canon NP6621 Service Manual page 88

OPERATIONS AND TIMING
2. Relationship between Scanner Sensors and Signals
Scanner sensor Signal
PS1 Scanner SCHP
home position
sensor
Reference:
The timing at which the registration clutch is turned ON is determined in relation to when the Copy Start
key is pressed or when the scanner is moved forward.
3. Basic Sequence of Scanner Operations
Power switch
Scanner home position
sensor (PS1)
Registration sensor (PS6)
Scanner
Scanning lamp
*The scanner is returned to home position at power-on whenever the scanner is not at home position.
3–32
Scanner
Forward
Table 3-201
Copy Start key
ON ON
WMUP STBY
*

  
 
 
Figure 3-206
COPYRIGHT © 1998 CANON INC.
Reverse
Registration clutch ON
Scanner reverse OFF 0.1 sec later
INTR SCFW SCRV
AER

 
Forward Reverse
CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Description
SCFW SCRV LSTR