Chapter 3 Functional Description; High Voltage Circuit Section; Low Voltage Analog Circuit Section - ZOLL AED 3 Service Manual

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Chapter 3

Functional Description

This chapter contains functional descriptions of the components contained in all

of the ZOLL AED 3 models. Refer to the Appendix for a diagram of the

ZOLL AED 3 Hardware/System Architecture.

The high voltage circuit section is electrically isolated from the main battery and

the USB port, and is referred to as the isolated side.

The high voltage section is controlled by the Micro-controller (MCU) and the

Complex Programmable Logic Device (CPLD) in real time. The MCU gets

instructions (commands) from the System on Module (SoM) (such as charge

voltage for the high voltage capacitor, discharge schedule, discharge button

state, etc.) and reports the high voltage section status (such as self-test results,

raw ECG data, patient impedance, safe to charge, safe to discharge, etc.)

through isolated communication channels.

Low voltage analog circuits exist both in the isolated and the non-isolated

circuitry. Isolated functionality includes ECG, CPR, and battery monitoring. Non-

isolated functionality includes audio playback and recording, and battery

monitoring.

9650-00761-01 Rev. A

ZOLL AED 3 Service Manual

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