ZOLL PD 2000 - Page 61

SERVICE MANUAL
1. SYSTEM
The PD™ 1400-series have a modular design philosophy. Each of the
major circuits is contained on a separate assembly, which if defective, can
be directly exchanged with a factory calibrated replacement.
ANALOG PCB
ECG/CRT on]
{ |- RECORDER |
SUPPLY GPU EPU USER INTERFACE
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一
上
一
[opTioN
MopuuE
BATTERY
STIM PCB PADOLES
PAGE
DEFIB ELECTRODES
System Diagram
The five major circuit assemblies and their functions are:
1. Power Supply
The Power Supply assembly provides the system with all voltages
required. The battery current is provided by way of a fuse to this circuit.
Digital Board
The Digital Board assembly handles the primary instrument functions
and enables interaction between the operator and the overall system. The
circuit is designed around two microprocessors. The function of the CPU
includes user interface, mode control, recorder, pacer pulse generation,
defibrillation charge and discharge control, and code summary. The
function of the EPU (ECG processing unit) includes ECG signal
processing, CRT, and safety monitoring.
3. Stimulator Board
The Stimulator Board assembly includes the Pacer and Defibrillator.
The Defibrillator circuit will charge the high voltage capacitor (HVC) to
the desired target energy and deliver the waveform shaped HVC energy
to the patient connector. The high voltage capacitor circuit controls the
shape and delivery of the energy waveform to the paddles.
IV-2