A7™ Service Manual 046-006272-00 1 - 53
Theory of Operation Ventilator UI
1.6.1.6 Screen Backlight Board
NOTE: System will have a Backlight Inverter Board or a Screen Backlight
Board.
FIGURE 1-61 Screen Backlight Board, Top View
FIGURE 1-62 Screen Backlight Board, Bottom View
Screen Backlight Board Interface, J1
Screen Backlight Board Interface, J2
PIN NAME FUNCTION
1 VPP 12V Power Supply
2GND Ground
3 BCON Screen Backlight Enable Signal
4 DIMMING Screen Backlight Control Signal
5NC None Connection
PIN NAME FUNCTION
1GND Ground
2 PWM Screen Backlight Control PWM Signal
3 LED_EN Screen Backlight Enable Signal
4 VPP 12V Power Supply
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