Controls - Canon imageRUNNER 2525 Series Service Manual

● Basic Sequence at Start Key ON (ADF mode/1 original)
Scanner motor
(M31)
LED
CISHP sensor
(S31)

Controls

■ Controlling the Scanner Drive System
● Overview
Parts configuration of scanner drive is described below.
Original glass
cover open/close
sensor (rear) (S33)
Original glass
cover open/close
sensor (front) (S32)
• Scanner motor (M31) drive signal
Turns on/off the motor and controls its direction/speed of rotation.
• Contact image sensor (CIS) HP sensor (S31) signal
Detects that the contact image sensor (CIS) is at the home position.
Black shading/White shading
Start key
ON
STBY SCRW
Shading
Stream reading
position
position
Stream reading
start position
1. Black shading/
White shading/
Original scan
Scanner motor (M31)
Reader relay PCB
(PCB2)
CISHP sensor (S31)
SCFW
Shading
Trailing edge
position
of original
CS HP
sensor
Original glass
reading start
position
HP
Carriage drive belt
Sensor
shading
plate
Backward
movement
Guide shaft
26
2. Technical Explanation
STBY
: Forward movement
: Backward movement
Shading
position
Forward
movement
Carriage
Contact image
sensor (CIS)