Daewoo KOR-1P5C7S Service Manual page 22

(TROUBLE 4) The following visual conditions indicate a probable defective touch control circuit or membrane switch
assembly (KOR-1P5C7S)
1. Incomplete segments,
1) Segments missing.
2) Partial segments missing.
3) Digit flickering other than normal display slight flickering.
4) " :0" does not display when power is on.
2. A distinct change in the display is not on when they should be.
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. Specific numbers (for example 2 or 3) will not display when the panel is touched.
6. Display does not count down or up with time cooking or clock operation.
7. Oven is programmable and cooks normally but no display shows.
8. Display obviously jumps in time while counting down.
9. Display counts down noticeable too fast while cooking.
10. Display does not show the time of day when clear pad is touched.
11. Oven lamp 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.
CONDITION
Display does
not show
programming
at all, even if
keyboard is
touched.
NOTE
Before following the particular steps listed above in the trouble shooting guide for the membrane keyboard's,
failure, please check for the continuity of each wire-harness between the membrane keyboard and P.C.B.
assembly.
CHECK
Check each pad for
continuity of the membrane
keyboard for the following
keyboard check procedure
RESULT
Normal
of control circuit
Abnormal
of the membrane
21
CAUSE REMEDY
Replace
Malfunction
control circuit
board
Replace the
Malfunction
membrane
keyboard
keyboard
board