Service manual

Chapter 9
9-1
9.1 Control Panel
9.1.1 Overview
0011-3750
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).
F-9-1
9.2 Fans
9.2.1 Overview
0011-2095
iR2016J / iR2016 / iR2020 / / iR2016i / iR2020i
This machine is provided with a fan to cool the fixing unit.
F-9-2
9.2.2 Fan Control
0011-2096
iR2016J / iR2016 / iR2020 / / iR2016i / iR2020i
The fan motor control circuit is shown below.
F-9-3
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
ASIC
CPU
LED
LCD
Key SW
Image Processor
PCB
Cntrol Panel PCB Control Panel PCB
for FAX (Option)
LED
Key SW
FM1
J219
+24V
FM1
FANDRV
GND
FAN_LOCK
Fan drive
voltage
switching circuit
CPU
DC Controller PCB
3
2
1
FAN FULL
FAN HALF