A5/A3™ Service Manual 046-001141-00 1 - 43
Theory of Operation Ventilator UI
FIGURE 1-37 Backlight Inverter Board, Top View
FIGURE 1-38 Backlight Inverter Board, Bottom View
Inverter Board Interface, J1
Inverter Board Interface, J2 and J3
1.6.1.3 Screen Backlight Board
NOTE: System will have a Backlight Inverter Board or a Screen Backlight
Board.
FIGURE 1-39 Screen Backlight Board, Top View
PIN NAME FUNCTION
1GND Ground
2GND Ground
3GND Ground
4 BL_ADJ Display Brightness Control Signal
5BL_ON/OFF Inverter Enable Signal
6
12V 12V Power Supply
7
12V 12V Power Supply
8
12V 12V Power Supply
PIN NAME FUNCTION
1 High_Voltage High-Voltage Output of the Inverter
2 Low_Voltage Low-Voltage Output of the Inverter
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