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Following the procedures below to check if the oven is defective or not.
1. Check grounding before checking trouble.
2. Be careful of the high voltage circuit.
3. Discharge the high voltage capacitor.
4. When checking the continuity of switches or of the high voltage transformer, disconnect one lead wire from these parts
and then check continuitry with the AC plug removed. To do otherwise may result in false reading or damage to your
meter.
5. Do not touch any part of the circuitry on the touch control circuit since static electric discharge may damage this control
panel.
Always touch yourself to ground while working on this panel to discharge any static charge built up in your body.
First of all operate the microwave oven following the correct operation described on pages 9~23 by time cooking, in order to
find the exact cause of any trouble.
(TROUBLE 1) The following visual conditions indicate a probable defective touch control circuit or membrane
switch assembly.
TROUBLE SHOOTING GUIDE
1. Incomplete segments.
(A) Segments missing.
(B) Partical segments missing.
(C) Digit flickering other than normal fluorescent slight
flickering.
(D) “ :0” does not display when power is on.
2. A distinct change in the brightness of one or more
numbers in the display.
3. One or more digits in the display are not on when they
should be.
4. Display indicates a number different from one touched.
5. For example, touch 5 and 3 appears in the display.
6. Specific numbers (for example 5 and 3) will not display
when the panel is touched.
7. Display does not count down or up with time cooking
or clock operation.
8. Oven is programmable and cooks normally but no
display shows.
9. Display obviously jumps in time while counting down.
10.Display counts down noticeably too fast while cooking.
11.Display can not shift from the first stage cooking to the
third stage cooking while 3 phase cooking (including
defrost).
12.Display does not show the time of day when dear pad
is touched (in clock mode).
13.Oven lamp and fan motor and turntable motor do not
stop although cooking is finished.
Check if the RELAY “2” contacts close if they are
close, replace touch control circuit.
STAGE
DEFROST
1 2 WEIGHT TIME
AUTO
START
LOCK NO CUPS g
