Original Exposure System; Construction; Specifications/Controls/Functions; Major Components - Canon imageRUNNER 2530 Service Manual

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Technology > Original Exposure System > Construction > Major Components

Original Exposure System

Construction

Specifications/controls/functions

The major specifications, controls and functions of the original exposure system are described
below.
Item
Original exposure LED
Original scan In book mode
Original scan is performed by moving the contact image sensor
(CIS).
In ADF mode Original stream reading is performed with the contact image
sensor
(CIS) fixed.
Read resolution B/W: 600 dpi (main scanning) x 600 dpi (sub scanning)
(Color SEND): 300 dpi (sub scanning)
Gradation 256 gradation
Carriage position detection Contact image sensor (CIS) HP sensor (S31)
Magnification 25% to 200%
Main scanning Image is processed on main controller PCB
direction
Sub scanning In book mode: speed change by carriage travel, image process
on main controller PCB *1
direction
In ADF mode: original feed speed change, image process on
main controller PCB *1
Lens Rod lens array
CMOS sensor Number of lines:1
Number of pixels: Total 7488 (incl. 7276 effective pixels)
Maximum original scan width: 297mm
CIS drive control Drive control by reader motor (M31)
Original size In book mode Main scanning direction: by reflection sensor (AB/INCH)
detection
Sub scanning direction: by reflection sensor (AB/INCH)
In ADF mode Main scanning direction: by photo interrupter on DADF
Sub scanning direction: by photo interrupter on DADF
*1 Controls differ depending on magnifications. Refer to [Magnifications] for more information.
2 Technology > Original Exposure System > Construction > Major Components
Specification/function
T-2-1 T-2-1

Major Components

Following shows major components of document exposure system.
S36(2A)
S36(2B)
S37
PCB2
S33
S32
H5
S31
Item Notation
Scanner motor M31
CCD HP sensor S31
Copyboard Cover Open/Closed S32
Sensor 0
Copyboard Cover Open/Closed S33
Sensor 1
Original Size Sensor 0 S34
Original Size Sensor 1 S35
Original Size Sensor 2A S36
Original Size Sensor 2B S36
Original Size Sensor 3 S37
CIS unit -
Reader Heater H5

Reader relay PCB

PCB2
M31
H5
S34
S35
CIS
F-2-4 F-2-4
Specification/function
Pulse motor: controls the carriage drive
Detects CIS home position
Ends original size identification with the copy board
cover at 5 deg
Detects the copyboard cover open/close. Starts
original size identification with the copy board cover
at 30 deg.
Helps identify original size (AB, INCH/AB/K, INCH/A)
Helps identify original size (AB, INCH/AB/K, A)
Helps identify original size (AB, INCH/AB/K, A)
Helps identify original size (INCH/A)
Helps identify original size (AB, INCH/AB/K, INCH/A,
A)
Indirect exposure by LED (LED & photoconductive
body)
Prevents condensation on the copyboard glass
Controls the reader unit drive and image process
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