Panasonic NN-CT890SBPQ Service Manual page 22

NN-CT890SBPQ
Screws to remove the magnetron
10.2. Inverter power supply (U)
1. Discharge the high voltage capacitors
2. Unplug the H.V. Lead wires from the magnetron
3. Remove the connector CN701 and CN702 from the
inverter PCB
4. Remove the two screws holding the inverter base to the
chassis (See figure 3)
5. Remove the one screw holding the inverter earth wire to
the oven chassis.
6. Carefully remove the inverter PCB and support base from
the oven.
7. Remove the air guide E by un-clipping the catch hooks
8. Remove the four screws holding the PCB to the inverter
support base.
Caution when replacing the inverter power supply (U)
1. Make sure that grounding plate is in place
2. Securely tighten the grounding screw through the side of
the chassis (Base).
Figure 2
3. Securely connect the 3 lead wire connectors
4. Make sure that the heat sink has enough space (gap)
from the oven. Take care not to touch any lead wire to the
aluminium heat sink because it is hot.
Removal of the inverter PCB
22
Figure 3