Operation Panel - Canon LBP-2000 Service Manual

CHAPTER 2
B . Operation Panel
1 . O u t l i n e
The operation panel has one LCD with 16 characters by 2 lines, six switches, and four LEDs.
The operation panel is connected with the video controller PCB and has the following functions.
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.
Video controller PCB
ASIC
2 - 62
J6 J401
-1
-13
+5V
-2,9,10
GND -12,-5,-4
-3
-11
/SCEN
-4 -10
/PCLK
-5
-9
/COMWR
-6 -8
/DENB
-7 -7
/PNLWD
-8 -6
/PNLRD
-11 -3
/RESET
-12 -2
TX
-13 -1
RX
Figure 2-6-3

Operation panel

LED
CPU
Switch
Buzzer
LCD