EDAN iM80 - Key Board; Interface Board (Big); Interface Board (Small); Lvds Lcd

iM80 Patient Monitor Service Manual Principle Introduction
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6.1.6 Key Board
The key board codes the operation of keys and control knob with ATMEGA16L singlechip
processor, sends keycode to main control board using PS2 protocol, answers the corresponding
keys. The touch screen communicates with the main control board through a set of independent
serial ports. Its structure block diagram is as follows:
Touch screen
Key board
Main board
Knob
Alarm
light
Inverter
Figure 6-3 Key Board Principle Block Diagram
6.1.7 Interface Board (big)
Interface board includes SD card interface, analog output/synchronous defibrillation interface,
nurse call interface, RS232 interface, VGA visual signal interface, audio interface, power control
board interface, printer interface, and the second network interface.
6.1.8 Interface Board (small)
Interface board mainly includes USB interface and network interface.
6.1.9 LVDS LCD
Its main technical specifications are as follows:
Items Unit Specifications
Screen Diagonal [mm] 380 (12.1”)