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TROUBLE SHOOTING GUIDE
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. (see page 28)
4. When checking the continuity of switches or of the high voltage transformer, disconnect one lead wire
from these parts and then check continuity 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 circuity 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 7~21 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.
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 does not show the time of day when
dear pad is touched (in clock mode).
12. Oven lamp and fan motor and turn table motor
do not stop although cooking is finished.
Check if the RELAY "2" contacts close if they
are close, replace touch control circuit.
DEFROST
COOK
34
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