Heat Dissipation From Power Componentry - Fronius TransPocket 1500 Service Manual

ESD precautions -
(continued) -
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Protective equipment
In the electrostatic protection areas (EPA's), the following ESD protective equipment is
used. All of this equipment is connected to the shared earthing facility via a defined
resistance (uniform potential):
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Connect up the wrist-bands to the (suitably labelled) earthing points. The ESD officer is
obliged to inspect the protective precautions once a month, or to arrange such
inspection thereof.
Symbols
Heat dissipation General remarks
from power
componentry When it comes to servicing the TP 1500 power source, the secondary diode and the
transistor module (on the LCA 15 board), are especially critical components. Both the
secondary diode and the transistor module are power-semiconductor devices that are
attached to the heat-sink on the power source.
The power-semiconductor devices emit large amounts of heat, which has to be
transmitted to the heat sink across a relatively small contact area. Smooth operation of
the power source can only be guaranteed as long as effective heat-transfer takes place
from the secondary diode or transistor module to the heat-sink.
If this heat transfer is impaired in any way, this will swiftly and surely lead to the
destruction of the secondary diode or transistor module.
Heat-transfer film
Replacement secondary diodes and transistor modules are supplied with a protective
film covering this heat-transfer film. Before installing such new components, peel off the
protective film first.
Outside the EPA, use suitable containers
Use specially labelled packaging and shipping materials
If anything is unclear, notify the responsible ESD officer
Work surfaces
Floors
Discharging wrist-bands
ESD-compatible seating
- Label identifying an electrostatic
protection area (EPA)
- Label identifying electrostatic-sensitive
devices (ESDS)
- Label identifying an earthing point
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