Service Manual EMWK 1060.0
19
For internal use only
7.
Safety precautions during troubleshooting
Before it leaves the factory, every appliance is carefully checked but it must be correctly installed and
operated. In spite of all safety measures, safety depends on correct installation and correct operation
and maintenance by the customer.
WARNING - MICROWAVE ENERGY
Service technicians must never be exposed to the microwave radiation which can be
emitted by the magnetron or other components producing microwaves if the appliance is
not connected correctly or operated improperly.
All input and output connections, waveguides, flanges and seals are to be attached and
sealed correctly.
Never operate the appliance without having placed items in the cooking cavity which
absorb the microwaves.
Never look into the open waveguide or the antenna when the magnetron is live.
The appliance must never be operated without the housing or with the door open.
If the fuse blows, always block the system operability first (all microswitches) before the appli-
ance is switched on again.
If a microswitch is defective, always replace all microswitches.
Before activation of the magnetron or before repair work, check the following points with all
appliances:
•
The door does not close properly at the frame because it is deformed or the hinges are damaged.
•
Door or door seal damaged
•
Appliance obviously damaged
All defective or incorrectly set components in the locking, control, door locking, microwave generator and
transmission systems must be repaired, replaced or correctly set. Service technicians must first remove
their watches for all work on or near the magnetron.
•
Caution: The high-voltage capacitor could still be electrically charged about 30 sec. after the appliance
has been switched off. It is advisable to discharge the capacitor each time through both poles using a
suitably insulated cable. Secondary power circuits of the transformer have a high voltage and a low
amperage and for this reason it is extremely dangerous to work near these components if the
appliance is plugged into the mains. Never touch cables with your bare hands or with non-insulated
tools when the appliance is in operation.
•
Do not measure the electric voltage of a high-voltage circuit or magnetron filament.
•
Make sure that the door is not loose or is missing. If the screws are not tightened fully, this could
lead to the discharge of microwaves.
•
Before you switch on the appliance, check that all electric connections are tight.
•
Ensure with a reasonable procedure that no microwaves are emitted.
•
Do not insert any metal objects either through the lamp gap or through any other gap as such
objects could act as an antenna and could result in the emission of microwaves.
Summary of Contents for EMWK 1060.0
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