Control Panel; Overview; Fans; Fan Control - Canon iR2020 Series Service Manual

9.1 Control Panel

9.1.1 Overview

iR2016J / iR2016 / iR2020 /
The machine's control panel consists of the following PCBs, and is controlled by the ASIC of the image processor PCB.
The indication on the LCD is in 2 lines (120 x 24 dots).

9.2 Fans

9.2.1 Overview

iR2016J / iR2016 / iR2020 / / iR2016i / iR2020i
This machine is provided with a fan to cool the fixing unit.

9.2.2 Fan Control

iR2016J / iR2016 / iR2020 / / iR2016i / iR2020i
The fan motor control circuit is shown below.
Switching between full-speed rotation and half-speed rotation is controlled as described below.
1) Full-speed control
When the CPU on the DC controller outputs a fan full speed signal (FAN_FULL), the fan drive voltage switching circuit supplies a +24 V fan drive voltage to turn
the heat exhaust fan at the full speed.
2) Half-speed control
Image Processor Cntrol Panel PCB
PCB
ASIC
FM1
DC Controller PCB
CPU
FAN FULL
Fan drive
voltage
FAN HALF
switching circuit
Control Panel PCB
for FAX (Option)
CPU
Key SW
Key SW
LED
LCD
F-9-1
F-9-2
+24V
J219
FANDRV
3
GND
2
FAN_LOCK
1
F-9-3
LED
FM1
Chapter 9
0011-3750
0011-2095
0011-2096
9-1