9.3. 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
(Z606YBA00GP)
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.
9.4. How to check the semiconductors using an OHM meter
22
NN-GD371S / NN-GD361M / NN-GD351W
Summary of Contents for NN-GD351W
Page 2: ...2 NN GD371S NN GD361M NN GD351W ...
Page 3: ...3 NN GD371S NN GD361M NN GD351W ...
Page 5: ...1 FEATURE CHART 2 CONTROL PANEL 5 NN GD371S NN GD361M NN GD351W ...
Page 6: ...3 SCHEMATIC DIAGRAM 6 NN GD371S NN GD361M NN GD351W ...
Page 24: ...10 EXPLODED VIEW AND PARTS LIST 10 1 EXPLODED VIEW 24 NN GD371S NN GD361M NN GD351W ...
Page 31: ...11 DIGITAL PROGRAMMER CIRCUIT 11 1 SCHEMATIC DIAGRAM 31 NN GD371S NN GD361M NN GD351W ...
Page 32: ...32 NN GD371S NN GD361M NN GD351W 06 11 S BB1 S BB3 S BB4 Printed in China ...
