EDAN M3 Service Manual

M3 Vital Signs Monitor Service Manual
- 18 -
Principle Introduction
This module detects key and encoder input signals, converts them into codes and sends to Main
control board. Main control board sends command to the keyboard and the latter accordingly
control indicator and audio process circuit to realize audio and visual alarm.
CPU
Detect key and encoder input signals;
Control LED status;
Regularly zero Watchdog Timer;
Communicate with Main control board.
Audio Process Circuit
Advance audio signals to drive the speaker to give sound.
Watchdog
After power-on, supply Reset signal to CPU;
Provide functions of Waterdog Timer Output and voltage detection.
2.2.4 Recorder Module
This module is designed to drive line thermal recorder.
Schematic Diagram
Figure2-6 Schematic Diagram of Recorder Module
Principle Introduction
This module receives printing data from Main control board. At the same time of converting the
data into dot matrix data and sending them to the thermal recorder, it also drives the recorder to

EDAN M3 Specifications

General

Brand	EDAN
Model	M3
Category	Monitor
Language	English