NN-CT890SBPQ
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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).
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.
Screws to remove the magnetron
Figure 2
Removal of the inverter PCB
Figure 3
Summary of Contents for NN-CT890SBPQ
Page 10: ...NN CT890SBPQ 10 6 Schematic Diagram ...
Page 11: ...NN CT890SBPQ 11 7 Wiring Diagram Wiring Harness ...
Page 15: ...NN CT890SBPQ 15 8 5 1 convection and microwave duty cycles Figure 1 ...
Page 16: ...NN CT890SBPQ 16 8 5 2 grill and microwave duty cycles Figure 2 ...
Page 28: ...NN CT890SBPQ 28 Removing the oven back plate Figure 14 Removing the base plate Figure 15 ...
Page 29: ...NN CT890SBPQ 29 Removing the circulation motor Figure 16 ...
Page 33: ...NN CT890SBPQ 33 13 Troubleshooting Guide ...
Page 36: ...NN CT890SBPQ 36 14 Exploded View ...
Page 44: ...NN CT890SBPQ 44 20 Digital Programmer Circuit ...