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1. Discharge high voltage before touching Inverter PCB.
1. Unplug oven and leave it for more than 30 seconds before
removing outer cabinet.
2. Use insulated lead wire to short across D701 Anode to
D702
Cathode
or
short
across
magnetron
filament
terminals to the chassis ground. Please refer to service
manual for detail of the specified model.
2. Remove inverter PCB from oven before troubleshooting.
Refer to related service manual for inverter PCB removal.
1. Visual check:
a. PCB board: Any crack on board, burnt printed copper
foil pattern? Any cockroach, bugs excrements, any mark
of wet?
b. Components: Any damaged components? Any burnt,
broken or missing?
3. Check component by circuit tester.
24
NN-V690P / NN-V690PS / NN-V680W / NN-V680WS
Summary of Contents for NN-V680W
Page 3: ...20 INVERTER CIRCUIT 43 21 REF NO 35 INVERTER U 44 3 NN V690P NN V690PS NN V680W NN V680W ...
Page 4: ...1 CONTROL PANEL 4 NN V690P NN V690PS NN V680W NN V680WS ...
Page 6: ...6 NN V690P NN V690PS NN V680W NN V680WS ...
Page 8: ...3 2 SCHEMATIC DIAGRAM XNE ZPE 8 NN V690P NN V690PS NN V680W NN V680WS ...
Page 17: ...17 NN V690P NN V690PS NN V680W NN V680W ...
Page 22: ...9 TROUBLESHOOTING GUIDE NEW H V 22 NN V690P NN V690PS NN V680W NN V680WS ...
Page 23: ...23 NN V690P NN V690PS NN V680W NN V680W ...
Page 27: ...10 HOW TO CHECK THE SEMICONDUCTORS USING AN OHM METER 27 NN V690P NN V690PS NN V680W NN V680W ...
Page 30: ...12 EXPLODED VIEW AND PARTS LIST 30 NN V690P NN V690PS NN V680W NN V680WS ...
Page 39: ...18 DIGITAL PROGRAMMER CIRCUIT SCHEMATIC DIAGRAM 39 NN V690P NN V690PS NN V680W NN V680W ...
Page 40: ...40 NN V690P NN V690PS NN V680W NN V680WS ...
Page 43: ...20 INVERTER CIRCUIT SCHEMATIC DIAGRAM 43 NN V690P NN V690PS NN V680W NN V680W ...