23
12.7 Checking the semiconductors using a resistance meter
Microwave oven shuts down
between 15 - 33 seconds.
Set the microwave oven to test
mode
Set to high power 1 minute.
H97 or H98 appears in the dis-
play and the microwave oven
stops working
Program for 1 minute and per-
form the following test
1 Unplug CN702 connec-
tor and measure the
voltage between the
terminlas
Abnormal 1. Latch switch
2. DPC/Power relay
Normal Step 2
2 Unplug CN703 connec-
tor and measure the
voltage at Pin 1
Abnormal DPC
Normal 1. Magnetron
2. Inverter circuit
Diode
Transistor
Digital transistor
A
C
C
C
C
B
B
E
E
E
E
B
B
A
K
K
Forward
Forward
Forward
Forward
Reverse
Reverse
Reverse
Reverse
A-K
B-E
E-B
E-B
B-C
C-B
C-B
C-E
C-E
C-E
Low
Low
Low
10 -30 k 10 -30 k
50 -90 k
40 -60 k
Low
Low
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