7.4. 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
(Z606YBA00QP)
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.
7.5. How to check the semiconductors using an OHM meter
22
NN-GD462M / NN-GD452W / NN-GT462M
Summary of Contents for NN-GD452W
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Page 5: ...1 SCHEMATIC DIAGRAM 5 NN GD462M NN GD452W NN GT462M ...
Page 24: ...8 EXPLODED VIEW AND PARTS LIST 8 1 EXPLODED VIEW 24 NN GD462M NN GD452W NN GT462M ...
Page 32: ...32 NN GD462M NN GD452W NN GT462M ...
Page 33: ...9 2 SCHEMATIC DIAGRAM NN GT462M 33 NN GD462M NN GD452W NN GT462M ...
Page 34: ...34 NN GD462M NN GD452W NN GT462M 02 12 S 9X7 S 9X8 Printed in China ...
