Canon MF6530 Service Manual - Page 65
Various Control
UPC - 013803056037
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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