Canon LBP1760P, Service Manual

Page: 93 / 394

C. Operation Panel
1. Outline
The operation panel has one LCD with 16 characters by 2 lines, six switches, and three LEDs.
The operation panel is connected with the video controller PCB and has the following func-
tions.
a. Displays status and error message on the LCD.
b. Displays condition of the operation on the LED.
c. Changes menu to activate and the set values with the switches.
2. Operation
The LCD and LEDs on the operation panel are controlled by the signal output from the video
controller. Any signals indicated by the switches on the operation panel are input to the video
controller.
Figure 2-6-4
2 - 55
CHAPTER 2
LCD contoller LCD
Gate array
Switches
LEDs
+5V +5V
J2 B-1
B-2
B-3
B-4
B-5
B-6
B-7
B-8
J301-1
-2
-3
-4
-5
-6
-7
-8
+3.3V
+3.3V
B-9
B-10
-9
-10
AIR
Video controller PCB Operation panel
nSCEN
nPCLK
nCOMWR
nDENB
SO
SI