ncr/doc/RealPOS/7455/Technical_Manuals/7455_Re... - Alsys Data
ncr/doc/RealPOS/7455/Technical_Manuals/7455_Re... - Alsys Data
ncr/doc/RealPOS/7455/Technical_Manuals/7455_Re... - Alsys Data
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Chapter 1: Product Overview 1-21<br />
Operator Display<br />
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The <strong>7455</strong> is available with either a 12.1" TFT (active matrix) or a 12.1"<br />
DSTN (passive matrix) LCD.<br />
DSTN LCD panels require a contrast adjustment for optimal viewing.<br />
Contrast control is set by software, using a digital potentiometer on the<br />
Processor Board. The terminal does not have a user-accessible contrast<br />
adjustment. Software can set a default value after reading the Panel ID.<br />
Display contrast changes with temperature. The DSTN panels contain<br />
temperature-compensation circuitry that adjusts contrast automatically<br />
as the temperature of the panel changes.<br />
LCD Adapter Cable<br />
The signals from the LCD header on the main board are brought up to<br />
the LCD on a flex adapter cable. This cable plugs directly into the LCD<br />
panel from the motherboard. The type of cable used is specific to the<br />
type of LCD used. Each LCD has a specific panel I.D. which is<br />
identified to the hardware system through the adapter cable.
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