Canon MF6530 Service Manual - Page 65

Various Control

Page 65 highlights

CS HP sensor Original glass reading start position HP Shading Leading edge position of original Trailing edge of original 1. Moves to the start position after black shading/white shading. 2. Original scan 3. Moves to the standby position Chapter 3 F-3-5 3.2.3 Basic Sequence after Depression of Start Key (ADF Mode, One Sheet of Original) 0012-7077 Reader motor (M401) LED Start key ON STBY Black shading/White shading SCRW SCFW STBY CS HP sensor (SR401) Shading position Stream reading position Trailing edge of original F-3-6 Shading position : Forward movement : Backward movement CS HP sensor Stream reading start position Original glass reading start position HP Shading position 1. Black shading/ White shading/ Original scan F-3-7 3.3 Various Control 3.3.1 Enlargement/Reduction 3.3.1.1 Magnification Change in Vertical Scan Direction 0012-7078 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. 3.3.1.2 Magnification Change in Horizontal Scan Direction 0012-7079 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. 3.3.2 Dirt Sensor Control 3.3.2.1 Outline 0012-7080 The machine changes the original read position or corrects the read image depending on the presence/absence of dust on the stream reading glass or ADF platen 3-3

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Chapter 3
3-3
F-3-5
3.2.3 Basic Sequence after Depression of Start Key (ADF Mode, One Sheet of Original)
F-3-6
F-3-7
3.3 Various Control
3.3.1 Enlargement/Reduction
3.3.1.1 Magnification Change in Vertical Scan Direction
0012-7078
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.
3.3.1.2 Magnification Change in Horizontal Scan Direction
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.
3.3.2 Dirt Sensor Control
3.3.2.1 Outline
The machine changes the original read position or corrects the read image depending on the presence/absence of dust on the stream reading glass or ADF platen
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