2-6
2.3.2 Output System
LCD
The patient monitor adopts a high-resolution LCD. The LCD is connected with the main
board. The signals and power supply from the backlight board are transferred by the button
board.
Alarm Lamp
The patient monitor has two alarm lamps: alarm lamp and technical alarm lamp. Alarm lamp
lights either red or yellow whereas technical alarm lamp lights blue only. The alarm lamp
signals are transferred by the button board and are directly controlled by the main board
Recorder
The recorder receives data form the main board and then sends them to the thermal printhead
for printing. The recorder has a hardkey (starting/stopping recordings) and a green LED on its
front panel. It is connected with the mother board.
The following diagram shows its operating principle.