Service manual

Contents
Contents
3.1 Basic Constraction .........................................................................................................................................................3-1
3.1.1 Specifications, Control Methods, and Functions ......................................................................................................................... 3-1
3.1.2 Major Components....................................................................................................................................................................... 3-1
3.2 Basic Sequence ..............................................................................................................................................................3-2
3.2.1 Basic Sequence at Power-on........................................................................................................................................................ 3-2
3.2.2 Basic Sequence after Depression of Start Key (Book mode, One Sheet of original).................................................................. 3-2
3.2.3 Basic Sequence after Depression of Start Key (ADF Mode, One Sheet of Original) ................................................................. 3-3
3.3 Various Control..............................................................................................................................................................3-3
3.3.1 Enlargement/Reduction................................................................................................................................................................ 3-3
3.3.1.1 Magnification Change in Vertical Scan Direction..........................................................................................................................................3-3
3.3.1.2 Magnification Change in Horizontal Scan Direction......................................................................................................................................3-3
3.3.2 Dirt Sensor Control ...................................................................................................................................................................... 3-4
3.3.2.1 Outline.............................................................................................................................................................................................................3-4
3.4 Parts Replacement Procedure.........................................................................................................................................3-5
3.4.1 Copyboard Glass.......................................................................................................................................................................... 3-5
3.4.1.1 Removing the Copyboard Glass......................................................................................................................................................................3-5
3.4.2 Analog Processor PCB................................................................................................................................................................. 3-5
3.4.2.1 Removing the Analog Processor PCB ............................................................................................................................................................3-5
3.4.3 Reader Motor ............................................................................................................................................................................... 3-5
3.4.3.1 Removing the Reader Motor...........................................................................................................................................................................3-5
3.4.4 Contact Sensor ............................................................................................................................................................................. 3-5
3.4.4.1 Removing the Contact Sensor.........................................................................................................................................................................3-5
3.4.4.2 Procedure after Replacing the CS ...................................................................................................................................................................3-6
3.4.5 Reader Home Position Sensor ..................................................................................................................................................... 3-6
3.4.5.1 Removing the Reader Home Position Sensor .................................................................................................................................................3-6
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