Panasonic Inverter NN-CT776SBPQ Service Manual page 21

Microwave oven shuts down
between 15 - 33 seconds.
Set the microwave oven to test
mode (See page )
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-
from the following test
12.7 Checking the semiconductors using a resistance meter
Diode
Transistor
Digital transistor
1 Unplug CN702 connec-
tor and measure the
voltage between the
terminlas
2 Unplug CN703 connec-
tor and measure the
voltage at Pin 1
A K
A K
C
B
E
C
B
E
E
C
B
E C B
Abnormal
Normal
Abnormal
Normal
Forward
A - K
Forward
B - E
B - C
C - E
Forward
E - B
C - B
C - E
Forward
E - B 10 -30 k
C - B 50 -90 k
40 -60 k
C - E
23
1. Latch switch
2. DPC/Power relay
Step 2
DPC
1. Magnetron
2. Inverter circuit
Reverse
Low
Reverse
Low
Low
Reverse
Low
Low
Reverse
10 -30 k