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D. Control Panel
1. outline
This control panel contains 8 LEDs,
one LCD (liquid-crystal display], 7
switches, and one
panel. The control panel is connected
to the video controller
the following functions.
a. Displays status and error messages on
the LCD.
Video controller PCE
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 lists the input
and output signals.
buzzer on the control
PCB. and has
b.
Displays the printer operating status
on the LEDs.
c.
Selects the printing environment,
o p e r a t i n g
m o d e , fitility, and paper
Sounds the buzzer if a switch input is
d.
ineffective or an error occurs.
panel
Table 2-6
GND
Meaning
GND
Panel CLocK
signal In
Data ENaBle
Serial Clock ENable
Hard Disk LED
GND
2-41
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