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
(F606YM300GP)
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
20
NN-GD376S / NN-GD366M / NN-GD356W
Summary of Contents for NN-GD376S
Page 2: ...2 NN GD376S NN GD366M NN GD356W ...
Page 3: ...3 NN GD376S NN GD366M NN GD356W ...
Page 5: ...1 SCHEMATIC DIAGRAM 5 NN GD376S NN GD366M NN GD356W ...
Page 18: ...7 2 Trouble related to Digital Programmer Circuit 18 NN GD376S NN GD366M NN GD356W ...
Page 21: ...8 EXPLODED VIEW AND PARTS LIST 8 1 EXPLODED VIEW 21 NN GD376S NN GD366M NN GD356W ...
Page 27: ...9 DIGITAL PROGRAMMER CIRCUIT 9 1 SCHEMATIC DIAGRAM NN GD376S 27 NN GD376S NN GD366M NN GD356W ...
Page 28: ...28 NN GD376S NN GD366M NN GD356W ...
Page 29: ...9 2 SCHEMATIC DIAGRAM NN GD366M GD356W 29 NN GD376S NN GD366M NN GD356W ...
