Panasonic Microwave Ovens with Inverters Technical Manual page 18

DB701
Warning
1. Always unplug the microwave oven from the electricity supply, before
removing the outer panel.
2. Never touch the inverter PCB with the microwave oven plugged into the
electricity supply. The inverter circuit board handles voltages up to 5000
volts and is very dangerous.
3. Do not touch the heat sink during operation of the microwave oven. The
heat sink handles high voltage and becomes very hot.
4. Always discharge the high voltage capacitors located on the inverter
circuit board before beginning any troubleshooting.
5. Only test the inverter circuit board by installing it completely into the oven
and refitting the outer panel.
6. Always connect the inverter circuit to earth via the earth plate. It is very
dangerous to operate the inverter circuit when it is not connected to earth.
Inverter Power Supply Circuit
IGBT
Circui
Figure 13
13
D701
CT701
D702