Marquette Hellige GmbH MicroSmart V 2.xx Page 8
Servicing Instructions 227 470 35 B - 97.12
2.2 Mechanical structure
The major mechanical components of MicroSmart are the top and bottom shell. The bottom shell
is the basic element carrying the following sub-assemblies:
- Power supply module with system inlet, power supply unit and patient input.
- Battery
- Thermal array drive with paper magazine
- PCB MicroSmart with display
The top shell holds the keyboard which is linked to the PCB MicroSmart via a flexible cable.
The 15-pin inlet plug for
connecting the patient lead is located at the power supply module. It is
linked to the PCB MicroSmart via a flexible cable.
3 Description of the function
The description of the individual function blocks follows the Block diagram of the total unit in
chapter 1.1
and the function blocks of the P plans.
3.1 Power supply module
The power supply module comprises the following functions:
- System inlet with fuses
- Extended range power supply
- Patient input
These components are mounted on a carrier plate bolted into the bottom shell of the enclosure.
3.1.1 System inlet
The system inlet is defined as a system inlet module. It includes a three-pin IEC plug and two size
5 X 20 fuses accessible from the outside. The module is a component with snap-type function.
The system inlet is designed as "Universal Input", with the effect that no adjustment to the system
voltage ranges 100V~ ... 120V~ or 220V~ ... 240V~ is required.
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