Basic Sequence - Canon Color Image Reader - L1 Service Manual

2
Technology

Basic sequence

At power ON
Stream
Start Home
reading
position position
position
1. HP positioning
2. move to shift
shading start position
3. CMOS-LIVE control *2
gain correction
4. Completion operation
*1: Shifts only if the DADF is open.
*2: Controls by turning on/off the power of the scanner unit and the circuitry
around it for power saving and for protection against overheating.
*3: Shifts only if the DADF is open.
2
Technology
Original
Shading Image
Shading size Stop
start leading
position detection position
position edge
position
*1
*3
At start key ON (Book mode/1 sheet original)
Stream
Start Home
reading
position position
position
1. HP positioning
2. move to shift
shading start position
3. move to shift shading
4. fixed shading
- white plate dust detection
- shading correction
5. Start position
move to shift
6. Original scan
7. Completion operation
*1: Executed only if 1 min or more (power off) has passed from the previous session.
*2: Shifts only if the DADF is open.
*3: Shifts only if the DADF is close.
Original
Shading Image
Shading size Stop
start leading
position detection position
position edge
position
*1
*1
*2
*3
*3
2-4
2-4