Canon iR1020 Series, Service Manual

Page: 82 / 304

Chapter 4
4-4
F-4-5
4.2.3 Basic Sequence after Depression of Start Key (ADF Mode, One Sheet of Original)
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iR1020J / iR1024J / iR1020 / iR1024 / iR1024A / iR1024N / iR1024F / iR1024i / iR1024iF
F-4-6
F-4-7
4.3 Various Control
4.3.1 Enlargement/Reduction
4.3.1.1 Magnification Change in Vertical Scan Direction
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iR1020J / iR1024J / iR1020 / iR1024 / iR1024A / iR1024N / iR1024F / iR1024i / iR1024iF
In the Book mode or when the ADF is used
In the vertical scan direction, the image is read at 100%. Magnification is changed by processing data on the image processor PCB.
4.3.1.2 Magnification Change in Horizontal Scan Direction
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iR1020J / iR1024J / iR1020 / iR1024 / iR1024A / iR1024N / iR1024F / iR1024i / iR1024iF
In the horizontal scan direction, magnification is changed as follows depending on the selected magnification rate:
1) When magnification is reduced to 50-99%
Data is processed on the image processor PCB with the original scan speed held at 118 mm/sec.
2) When magnification is increased to 100-200%
The original scan speed (in the Book mode)/original feed speed (when the ADF is used) is changed within the range of 118 mm/sec to 59 mm/sec depending on the
selected magnification rate. Data is not processed on the image processor PCB.
Original glass reading
start position
1. Moves to the start position
after black shading/white shading.
3. Moves to the standby position
2. Original scan
Shading
position
Leading edge
of original
Trailing edge
of original
CS HP
sensor
HP
: Backward movement
: Forward movement
Black shading/White shading
Start key
ON
SCFW SCRW STBY STBY
Reader motor
(M401)
LED
CS HP sensor
(SR401)
Stream reading
position
Trailing edge
of original
Shading
position
Shading
position
Shading
position
Stream reading
start position
1. Black shading/
White shading/
Original scan
CS HP
sensor
HP
Original glass
reading start
position