Panasonic NN­GS595A Service Manual page 10

10/24/2016
Grounding of the inverter circuit board
WARNING! DISCHARGE THE HIGH VOLATGE CAPACITORS
For about 30 seconds after the oven is turned off, an electric charge remains in the high voltage capacitors in the Inverter Power
Supply circuit board.
When replacing or checking parts, remove the power plug from the outlet and short the inverter output terminal of the magnetron
filament terminals to the chassis ground with an insulated handle screwdriver to discharge. Please be sure to touch the chassis
ground side first and then short to the output terminals.
Discharging the high voltage capacitors
WARNING
There is high voltage present with high current capabilities in the circuits of the primary and secondary windings, choke coil and
heat sinkof the inverter. It is extremely dangerous to work on or near these circuits with the oven energized. DO NOT measure the
voltage in the high voltage circuit including the filament voltage of the magnetron.
WARNING
Never touch any circuit wiring with your hand or with an insulated tool during operation.
3.3 Part replacement
When any part or component is to be replaced, always ensure that the power cord is removed from the wall outlet.
3.4 When the 10A fuse is blown due to the operation of
the short switch
WARNING
When the 10A 220V fuse is blown due to the operation of the interlock monitor switch, replace all of the components (primary latch
switch, short switch and power relay B (RY1)).
1. This is mandatory. Refer to "adjustments and measurements" for the location of these switches.
2. When replacing the fuse, confirm that it has the appropriate rating for these models.
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