Daewoo KOR-3000 Service Manual download pdf (Page 37)

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 29)

4. When checking the continuity of switches or of the high voltage transformer, disconnect one lead wire from

these parts and then check cintinuity 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 in pages 6~21 by time cooking, in

order to find the exact cause if 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.

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 dis-

play when the panel is touched.

7. Display does not count down or up with time cook-

ing 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 coking 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 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 AUTO

START

WEIGHT TIME

LOCK NO CUPS

STAGE

1 2 ... 32 33 34 35 36 37 38 39 40 41 42 ... 61 62

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Daewoo KOR-3000 Service Manual Page 37

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