SE-1200 Series Electrocardiograph Service Manual Overview
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The electrocardiograph has 10 lead cables. The ECG signals pass through the defibrillator
protection circuit, the buffering circuit, and enter the difference amplifier circuit. Then they
continue to pass through the pacemaker pulse restraining, high-pass filter, low-pass filter, channel
switch, second level amplification, and enter the A/D sampling port of ADC.
3.2.3 PS900D Power Supply Module Description
Figure 3-4 PS900D Power Supply Module Diagram
PS900D power supply module is shown in the above figure. This module provides +12V and
+5V voltages for the main board, and also provides recharging circuit for the battery.
The hardware of the device can control the switch of DC/DC module to turn on the device. When
the software of the device detects the signal of turnoff, it will save necessary data, and then
control the system to turn off the device.
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