Cautions To Be Observed When Troubleshooting; Warning About The Electric Charge In The High Voltage Capacitor - Panasonic NE-3280 Service Manual

13. CAUTIONS TO BE OBSERVED WHEN
TROUBLESHOOTING
Unlike many other appliances, the microwave oven is high voltage, high current equipment. Though it is
free from danger in ordinary use, extreme care should be taken during repair.
Servicemen should remove their watches whenever
working close to or replacing the magnetron.
13.1. Check the earthing
Do not operate on a 2 wire extension cord. The microwave oven is designed to be used in a completely
earthed condition. It is imperative, therefore, to make sure it is properly earthed before beginning repair
work.
13.2. If the door lock, the door switch, the door seal or the door develops
a malfunction, be sure not to operate the oven until complete repairs are
made.
If the oven is operated with any of these parts in imperfect condition, hazardous microwave leakage
might occur.
Never operate the oven until the following are
confirmed:
1. The door is tightly closed.
2. There is no broken hinge or door arm.
3. The door seal is not damaged.
4. The door is not bent or warped.
5. There is no other visible damage.

13.3. Warning about the electric charge in the high voltage capacitor.

For about 30 seconds after the oven is turned off, an electric charge remains in the high voltage
capacitor. When replacing or checking parts, remove the power plug from the outlet, wait 30 seconds
and short the terminal of the high voltage capacitor (terminal of lead wire from diode) to chassis ground
with an insulated jumper lead wire or an insulated handle screwdriver to discharge.
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CAUTION
WARNING
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