Canon iR3570 Service Manual page 153

Main power
offset correction
switch ON
Reader motor
(M501)
LED
CIS HP sensor
(PS503)
Shading Shading
position position
F-3-3
2. Printer Unit
If any of the cassettes (1 through 4) is in low position, the lifter is moved up until the top of the stack of sheets is detected.
Shading
correction
CIS output
SREADY
CIS output
offset correction
- LED intensity adjustment
(when lit in each color)
- CIS output gain adjustment
(when lit in all colors)
STBY
Shading
position
: forward
: reverse
Chapter 3
3-3