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GONDITIONS
POSSIBLE CAUSE
"EF FF" appeares in display win-
1. Short or open oven temp sensor
dow after 2 minutes elapsed in the
2. Defective D.P.C.
bake,
broil,
combination
or con-
vection cooking mode
SYMPTOM
STEP
CHECK
| . . .
RESULT
CAUSE/CORRECTIONS
4
kow voltage transformer (L.V.T.) |
Abnormal (OV)
LVT.
No display when oven is first plug-
ged in
secondary voltage
IC-1 pin 64 voltage
{Emitter of Q1)}
IC-1 pin 27 voltage
(14 pin of IC-2)
Normal
IG1
IC-1 pin 23 voltage
Abnormal
ee
IC-3 pin 12 voltage
IC-3.
(at operation)
OB transistor
oy
| Abnormal
08
No beep sound
IC-3 pin 13 voltage
"IC-1 pin 19 voltage
(at operation)
Heater does not turn on
No microwave
oscillation
at any
power setting
IC-1 pin 20 and 21 voltages
(at High power operation)
F
:
Serep2
Q6 transistor
Abnormal
Normal
Replace DISP and check opera-
tion
Dark or unclear display
Abnormal
Normal
Missing or lighting of unnecessary
Replace IG-1:and check operation
DISP
«8
¥s
segment
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