8.3. Simple way of H.V. Inverter/magnetron troubleshooting
Purpose:
Simple way (3/23 seconds rule) of identifying whether it’s Magnetron, Inverter, or others.
Set-up:
The unit under question is connected through the Ammeter as shown below.
Procedure:
Follow the matrix table below to identify the problem source.
Note:
Do not replace both Inverter board and Magnetron simultaneously and automatically without going through this
procedure.
Power will:
Ammeter reading is:
To do:
Remedy:
Shut off in 23 seconds
after “Start”.
1. Between 0.5A and 1.0A.
Check and repair open magnetron circuit Open magnetron wiring between Inverter
and magnetron terminal.
2. Between 1.0A and 2.0A.
Check continuity of D702 in Inverter PCB.
1. D702 shorted
Replace H.V.Inverter
(F606Y6G00AP/F606Y6G00CP)
2. D702 is OK
Replace magnetron
Shut off in 3 seconds
after “Start”
1. Less than 0.5A
Check open circuit: Latch Switch, DPC,
Power Relay and CN701
Replace
defective
component(s),
or
correct switch, cables and connectors.
8.4. How to check the semiconductors using an OHM meter
23
NN-T695 NN-T685SF
Summary of Contents for INVERTER NN-H665
Page 2: ...2 NN T695 NN T685SF ...
Page 3: ...3 NN T695 NN T685SF ...
Page 5: ...1 SCHEMATIC DIAGRAM 1 1 APH 5 NN T695 NN T685SF ...
Page 6: ...1 2 CPH 6 NN T695 NN T685SF ...
Page 7: ...1 3 RPH 7 NN T695 NN T685SF ...
Page 24: ...9 EXPLODED VIEW AND PARTS LIST 9 1 EXPLODED VIEW 24 NN T695 NN T685SF ...
Page 35: ...10 DIGITAL PROGRAMMER CIRCUIT 10 1 NN T695SF APH CPH T695SF SM RPH 35 NN T695 NN T685SF ...
Page 36: ...36 NN T695 NN T685SF ...
Page 37: ...10 2 NN T685SF APH CPH T675SF APH 37 NN T695 NN T685SF ...
Page 38: ...38 NN T695 NN T685SF ...
Page 39: ...10 3 NN T665SF APH T655SF APH T664SFR APH 39 NN T695 NN T685SF ...
Page 40: ...40 NN T695 NN T685SF ...
Page 41: ...10 4 NN H665 APH CPH H635 APH S655 APH S645 APH S615 CPH 41 NN T695 NN T685SF ...
Page 42: ...42 NN T695 NN T685SF ...
Page 44: ...44 NN T695 NN T685SF ...
