B. Control Panel - Canon LBP 2460 - B/W Laser Printer Service Manual

B. Control Panel

1. Outline
The control panel contains 7 LEDs, one LCD (liquid-crystal display), 9 switches, and one buzzer
on the control panel. The control panel is connected to the video controller PCB, and has the
following functions.
a. Displays status and error messages on the LCD.
b. Displays the printer operating status on the LEDs.
c. Selects the printing environment, operating mode, utility, and paper source with switches.
d. Sounds the buzzer if a switch input is ineffective or an error occurs.
Video controller PCB
IC10
J6-C13
J6-A14
AIR
J6-C14
J6-B14
2. Operation
The LEDs, LCD, and buzzer on the control panel are controlled by signals from the video
controller. All signals generated by control panel switches are input to the video controller.
Table 2-6-1 lists the input and output signals.
DC controller PCB
nFP CLK
nFP CS
nFP DI
nFP SWRD
Figure 2-6-3
Table 2-6-1
Pin No. Signal name
J3-1 GND GND
J3-2 +5V +5V
J3-3 nFP CLK Front Panel CLocK
J3-4 nFP CS Front Panel contoller Chip Select
J3-5 nFP DI Front Panel serial input signal
J3-6 nFP SWRD Front Panel serial output signal
Control panel
J3-3
J3-4
CPU
J3-5
J3-6
Meaning
CHAPTER 2
LEDs
Switches
Beeper
LCD
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