ZOLL M Series Defibrillator Rev R - Manual (Page 128)

M Series Service Manual
118
Main System Board Functions
The Main System Board contains the major computing and control elements for the M Series unit. The printed wiring
board assembly (PWBA) receives signals from the front panel control switches, ECG input connectors and functional
modules, such as the AC/DC charger, pacer/defibrillator modules, stripchart recorder and PCMCIA card interfaces,
and if applicable, the SpO
2
and EtCO
2
modules. The Main System Board monitors and processes these input signals
to produce other signals that: 1) control the operation of other modules within the system; 2) drive the unit’s front panel
display and audio outputs and; 3) store data for retrieval via Summary Reports, PCMCIA cards and/ or a modem.
The electronic circuitry and software contained on the main system board performs the following major M Series
functions:
1. Main CPU and memory.
2. ECG signal acquisition and processing for ECG leads including,
• A/D conversion.
• ECG signal filtering.
• QRS detection.
• Implanted pacemaker detection.
• Heart Rate counting.
• Shockable ECG rhythm analysis.
3. Data communications with and control over the SpO
2
and EtCO
2
modules.
4. Control over and safety monitoring of pacer and defibrillator functions performed by the High Voltage module and
Biphasic Bridge module.
5. Physiological alarm processing.
6. Control switch monitoring for the front panel, accessory connection monitoring and control over the system
response to switch activation or accessory connection to the M Series.
7. Format and updating of the front panel display.
8. Primary power supplies for the unit.
9. Audio output generation and control (e.g., alarms, voice prompts, warning tones).
10. Audio signal processing, data compression and storage of voice recording data.
11. Real time clock and other time keeping functions.
12. Summary Report, 12 Lead ECG Reports data storage.