Daewoo KOR-637V0A, Service Manual, Page: 22 / 37

21
(TROUBLE 4) The following visual conditions indicate a probable defective touch control circuit
1. Incomplete segments
(1) Segments missing
(2) Partical 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 are not on when it 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 pressed.
5. Specific numbers (for example 2 or 3) will not display when the panel is preesed.
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 noticeably too fast while cooking.
10. Display does not show the time of day when STOP/CLEAR button is pressed. (in case of setting the present time)
11. Oven lamp and turntable motor do not stop although cooking is finished. Check if the RELAY 2 contacts close.
If they close, replace P.C.B main-assembly.
M/W DEF. LOCK PURIFI Ib
NOTE
Before following the particular steps listed above in the trouble shooting guide for the button of control panel,
failure, please check for the continuity of each wire-harness between P.C.B main-assembly and P.C.B. sub-
assembly.
CONDITION CHECK
Check each button for
continuity of the P.C.B sub-
assembly for the following
button check procedure
Malfunction
of the P.C.B main-
assembly
RESULT
Normal
CAUSE REMEDY
Replace the
P.C.B main-
assembly
Malfunction
of the P.C.B sub-
assembly
Abnormal
Replace the
P.C.B sub-
assembly
Display does
not show
programming
at all, even if
button is
pressed