Major Components - Canon imageRUNNER 1750 Series Service Manual

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Technical Explanation > Original Exposure and Feed System > Construction > Major Components

■ Major Components

● Reader Unit
Following shows major components of reader unit.
Reader motor (M10)
Reader controller PCB (PCB3)
ADF open/closed
detection sensor (PS23)
CIS HP sensor (PS24)
Contact image sensor (CIS)
Item Notation
Reader motor M10
CIS HP sensor PS24
ADF open/closed detection PS23
sensor
Original size detection sensor 1 PS22
Original size detection sensor 2 PS21
Contact image sensor -
Reader controller PCB PCB3
2 Technical Explanation > Original Exposure and Feed System > Construction > Major Components
Original size detection
sensor 1 (PS22)
Original size detection
sensor 2 (PS21)
Specification/function
Stepping motor: controls the carriage drive.
Photo interrupter: detects the home position of CIS
unit.
Photo interrupter: detects the opening or closing of
ADF. (detects the opening or closing of the ADF at
approximate 18 degrees.)
Detects the original size. (AB/Inch)
Detects the original size. (AB/Inch)
Reads the original. (LED + Light guide + CIS unit)
Controls the reader unit and ADF unit.
● ADF unit
Following shows major components of ADF unit.
1) Cross Section
Feed roller
Lead roller 2
Registration roller
Lead roller 1
Delivery reversal flapper 1
Platen guide
Item
Pickup roller
F-2-4 Feed roller
Separation pad
Registration roller
Lead roller 1
Lead roller 2
Delivery reversal roller
Delivery reversal roller (upper)
Delivery roller
Reversal roller
Platen guide
Delivery reversal flapper 1
T-2-2
Delivery reversal flapper 2
Original pickup tray
Original delivery tray
Delivery reversal roller (upper)
Pickup roller
Delivery reversal flapper 2
Separation pad
Delivery roller
Delivery reversal roller
Reversal roller
Specification/function
Picks up the original.
Separates and feeds the original.
Separates the original.
Feeds the original and forms a skew feed correction loop.
Feeds the original before reading.
Feeds the original after reading.
Delivers the original and performs upstream reversal feed of
the original.
Separated from the mating delivery reversal roller by the roller
release solenoid during reverse feed of the original.
Delivers the original.
Performs downstream reversal feed of the original.
Original read section.
Switches between the upstream reversal path and the
downstream reversal path.
Switches between the upstream reversal path and the delivery
path.
Allows you to load an original.
Stacks the delivered originals.
2-4
Original pickup tray
Original delivery tray
F-2-5
T-2-3
2-4