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NE-972
[TROUBLE 3) No microwave oscillation even though fan motor rotates.
CHECK
RESULT
CAUSE
REMEDY
1.
plied to power relay 5 coil
(NOTE 2)
(See Fig. 28A & 28B)
Faulty contacts of power relay
4
.
None
5 or open relay coil
Replace
NOTE 2: Connect DC volt meter between terminals 5 and 6 of power
relay 5. (See Fig. 28A & 28B)
Set power at High and set any time.
Normal digital programmer circuit should read approx. 18V
DC continuously.
,
CAUTION
A 240V AC is present at the shaded area b4 of the digital programmer circuit (Terminals of power re-
lays 2, 3, 5, 6, 7 and Triac etc.).
When troubleshooting, be cautious of possible electrical shock hazard.
NE-992/NE-993
HMI TALL
é.)
TERMINALS
RY6
4
Wah
TERMINALS
5 AND
6
\
Si
TERMINALS
5 AND
6
DIODE
(D3)
Fig. 28A
Fg. 28B
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