Canon 1730, Service Manual

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