Canon ImageRunner iR8500 Series Service Manual page 204

Chapter 3
3-20
J1720
38V
1
GND
Relay PCB
2
J514
0V
B7
5V
B6
MAIN_MOTOR_ON
DC controller
B5
MAIN_MOTOR_FG
PCB
B4
0V
B3
J611
1
Drive circuit
2
J612
1
2
Control
3
panel
4
5
When the main motor drive signal
goes '1', the main motor starts to rotate.
When the main motor starts to rotate,
the pulse signal goes '1'.
When the pulse signal goes '0', error
code E010 is indicated.
F-3-20
Main motor
(M1)
Clock pulse
generation
circuit
Reference
signal
generation
circuit