Inverter Warnings - Panasonic NN-C784MF Service Manual

6/17/2017
2.2 Inverter warnings
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DANGER, HIGH VOLTAGE AND HIGH TEMPERATURE (HOT/LINE) OF THE
INVERTER POWER SUPPLY (U)
This high voltage inverter power supply handles very high voltage and current for the magnetron tube. Though it
is free from danger in ordinary use, extreme care should be taken during repair.
The aluminum heat sink is also energized with high voltage (HOT), so do not touch when the AC input
terminals are energized. The power devices Collector is directly connected to the aluminum heat sink.
The aluminum heat sink may be HOT due to heat energy, therefore, extreme care should be taken during
servicing.
WARNING FOR INVERTER POWER SUPPLY (U) GROUNDING
Check the high voltage inverter power supply circuit grounding. The high voltage inverter power supply circuit
board must have a proper chassis ground, the inverter grounding bracket must be connected to the chassis. If the
inverter board is notgrounded it will expose the user to very high voltages and cause extreme DANGER! Be
sure that the inverter circuit is properly grounded via the inverter earth bracket.
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H.V. Inverter warning