Inverter NN-T551CB, Service Manual

Page: 17 / 63

grounded it will expose very high voltages and cause extreme DANGER! Be sure
that the inverter circuit is properly grounded via the inverter earth bracket.
Figure 2
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.
Figure 3