Canon iR3570 Series, Service Manual

Page: 192 / 722

Chapter 5
5-2
F-5-1
T-5-2
5.1.3 Construction of the Control System
0006-5715
iR2270 / iR2870 / iR3570 / iR4570 / / iR2270N / / iR2870N / / iR3570N / / iR4570N / iR2230 / / / iR3530 /
The machine's control system is constructed as follows:
Item Notation Description
[1] Original cover open/closed
sensor (rear) PS501 photo interrupter: detects the state (open/closed) of the
copyboard cover; starts original size indication when
the original cover is at 25 deg.
[2] Reader controller PCB - controls the drive of the reader unit, and controls image
processing
[3] Original sensor 3 PS506 helps identify original size (for all destinations)
[4] Original sensor 4 PS507 helps identify original size (AB, Inch/AB)
[5] Original sensor 5 PS508 helps identify original size (Inch/A)
[6] Reader motor M501 pulse motor: controls the drive of the carriage
[7] Reader heater* - prevents condensation on the copyboard glass
[8] Original sensor 1 PS504 helps identify original size (AB, Inch/A, Inch/AB)
[9] Original sensor 2 PS505 helps identify original size (AB, A, Inch/AB)
[10] Contact image sensor (CIS) - uses LEDs for indirect exposure (LED +
photoconducting body)
[11] CIS HP sensor PS503 photo interrupter: detects CIS home position
[12] Cupboard cover open/closed
sensor PS502 ends original size identification with the copyboard
cover at 5 deg.
*Optional. (100/230-V model only).
[6]
[4]
[5]
[3]
[9]
[8]
[2]
[1]
[12]
[7]
[7]
[11]
[10]