Lcd Indication Processing - Canon iR4570 Series Service Manual

Chapter 10
Touch Panel
LCD Panel

10.1.3 LCD Indication Processing

iR2270 / iR2870 / iR3570 / iR4570
The CPU on the main controlled PCB sends data (display data) to the control panel CPU PCB as instructed by the
program.
The data is sent through the control panel PCB to reach the color LCD.
10.1.4 LCD Indication Processing
/ iR3530
The CPU on the main controlled PCB sends data (display data) to the control panel CPU PCB as instructed by the
program.
The data is sent through the control panel PCB to reach the LCD.
10.1.5 Adjustment of the LCD Contact
iR2270 / iR2870 / iR3570 / iR4570
The machine is equipped with a density adjustment volume (VR6801) on its keypad PCB for use by the user to adjust
the contrast of the LCD screen.
10.1.6 Adjustment of the LCD Contact
/ iR3530
10-2
4
J1118
1
14
J1119
1
4 3
1
J956 J955
J1121
1 1
3
Control Panel
Inverter PCB
from Controller Unit
A18
A1
J511
B1 B18
J1116
Control Panel CPU PCB
J1117
J1120
1 2
to Foot Switch
F-10-2
1 16
J6802
16
1
Control Panel Key
Switch PCB
1
14
J6801
1
14
0006-6160
0006-6164
0006-6161
0006-6165