DFI BT253 - Manual (Page 14)

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14
Chapter 2 Hardware Installation
Chapter 2
Backlight Enable Power Select
3
JP3 is used to select the power level of backlight brightness control: +5V or +3.3V.
Important:
Before powering-on the system, make sure that the power settings of JP3 match the
power specification of backlight control. Selecting the incorrect voltage will seriously
damage the backlight.
JP3
1 3 2
1 3 2
1-2 On: +5V
2-3 On: +3.3V (default)
Dimming Mode Select
3
JP4
1-2 On: Voltage Mode
2-3 On: PWM Mode
(default)
1 3 2
1 3 2
JP4 allows you to select the mode for the lightness control of the LVDS panel.
Important:
You need to refer to your panel’s user guide to determine the type of mode (PWM or
Voltage) most appropriate for your panel.