secondary latch switch.
3. Test the continuity of the switches with the door open and closed
with an ohm meter on the lowest scale.
Normal continuity readings should be as followed.
Door Open
Door Closed
Primary Latch
Switch
infinite
(Open)
0 (Close)
Secondary
Latch switch
infinite
(Open)
0 (Close)
Power relay B
infinite
(Open)
infinite
(Close)
10.2. Short Switch and Monitor Circuit
1. Unplug the lead wires from the HV inverter primary terminals.
2. Connect the test probes of the ohm meter to these leads
3. Test the continuity of the short switch with the door open and the
door closed using the lowest ohm scale.
Door Open
Door Closed
Monitor switch
0
infinte
10.3. Magnetron
Continuity checks can only indicate an open filament or a shorted magnetron. To diagnose an
open filament or shorted magnetron.
1. Isolate the magnetron from the circuit by disconnecting the HV
leads
2. A continuity check across the magnetron filament terminals
should indicate one ohm or less
3. A continuity check between each filament terminal and the
magnetron case should read open.
31
Summary of Contents for NN-A880WB
Page 4: ...3 Control Panel 4 Operation And Digital Programmer Circuit Test Procdure 4 ...
Page 5: ...5 ...
Page 6: ...6 ...
Page 7: ...5 Schematic Diagram 7 ...
Page 13: ...Convection and microwave duty cycles Figure 2 Grill and microwave duty cycles 13 ...
Page 29: ...Removing the oven back plate Figure 15 Removing the base plate Figure 16 29 ...
Page 36: ...Fuses are not blown Fuses are not blown 36 ...
Page 37: ...Other problems Inverter circuit troubleshooting 37 ...
Page 39: ...How to check semiconductors 14 Exploded View 39 ...
Page 45: ...45 ...
Page 48: ...48 ...
Page 49: ...22 Key Board Matrix 49 ...
Page 50: ...23 Digital Programmer Circuit Parts 23 1 E603L4V20BP E603L4V30BP DPCAU 50 ...