Comen CM300 - 4.5 Troubleshooting Guide

Shenzhen Comen Medical Instruments co., ltd.
12
information.
PIN ID
CON7
CON10
CON11
CON12
Description
To LCD adapter
board
To ECG board
Main board
Power socket
To recorder
Working voltage
5V
20V（AC）
Module Function
Data storage, the CPU of the main unit, display circuit, network circuit,
recorder circuit and I/O interface.
3.2.2 3.2.2CM100_300 ECG Board
ECG board process the ECG signal gets from ECG cable. It implements signal amplification
including analog circuit, A/D converter and control circuit.
Analog circuit consists of lead signal amplification, channel switch, anti-alias filter, gain control,
lead-off detection. Control circuit is Responsible for coordinating with A/D convertor, channel
switch, gain control circuit and lead-off detection circuit to implement signal acquisition and
lead-off detection, the digital lead signal will then be sent to CPU by high speed photo-coupler.
PIN ID
P1
Description
ECG board socket, to main board
Working voltage
5V
Module Function
Measure ECG data