Mindray DC-6, Service Manual

Page: 52 / 191

Principle Description
3-14
3.2.11 Control panels and keyboard
The control panels and keyboard are designed for key scanning, indicator control, buzzer
control, receiving and processing for encoder data, STC data, PS/2 data, and they
communicate with the main unit through serial ports. The control panels and keyboard consist
of main panel, minor panel, encoder panel, and light control board, etc. The block diagram is
shown as follows:
The block diagram of the main panel is shown as follows:
Filter Sampling
HR
detect
DSC module
System
control
ECG module
Main CPU system
Front
interface
board
Footswitch
DC IN
ECG lead
Amplifier