Lcd Backlight Inverter; Alarm Light; Battery Interface; Speaker - GE Transport Pro Service Manual

LCD Backlight Inverter

Alarm Light

Battery Interface

Speaker

Revision A
Equipment Overview: Theory of Operation
The LCD backlight inverter is a DC to AC inverter for a dual lamp LCD.
The input voltage is rated at +8 to +18 V DC and the output voltage is
rated at 400 to 600 VRMS. The start voltage is 1400 VRMS and the lamp
current is 7 milliampere per tube.
The alarm light circuit board provides an alarm light in the monitor's
bezel. The input voltage is rated +5 V DC. It transmits two control
signals, one for red LEDs and another for yellow LEDs.
The battery interface circuit board provides power connections for the
two internal batteries for charge/discharge. It also controls battery
status communication with the monitor.
The speaker is used for audible notification of alarms. It is 66 mm
square, water-resistant, 3 watt, with a frequency response of 400 to 4500
Hz.
Transport Pro
2012659-042
2-15