Infratec™ 1241 Grain Analyzer
2:14 Service Manual 1001 5015 / Rev. 4
2.2.9 LCD Display
The display is a 6.4 inch color active matrix LCD module, VGA 640 x 480 pixel
resolution, incorporating amorphous silicon TFT (Thin Film Transistor). It is
composed of a color TFT-LCD panel, driver ICs, control circuits, power circuits and
a backlight unit.
Other features include a wide viewing angle with the best angle at 6 o'clock, high
contrast, anti glare polarizing filter, normally white display mode that produces
natural colors.
The display needs voltage from three sources to be operational:
• 5VDC from the Processor Board (the display on/off signal)
• Display backlight from the Display Interconnection Board
• Contrast voltage
The LCD Display is not repairable, it has to be replaced if a failure occurs.
The keypad is a passive matrix (7´4) with an LED power indicator. It is sometimes
here referred to as the keypad overlay.
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