Daewoo KOR-1A1G0A Service Manual page 25

TROUBLE SHOOTING GUIDE
(TROUBLE 4) The following visual conditions indicate a profective touch control circuit or membrane switch assembly.
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 they numbers is 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. 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 noticeably 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.
CONDITIO N
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.
CHEC K
Check each pad for
continuity of the
membrane keyboard
for the following
keyboard check
procedure
RESULT
Normal
Malfunction
control circuit
of control box
sub-assembly
Abnormal Malfunction of
the membrane
24
CAUSE REMEDY
Replace
control box
of touch
sub-assembly
Replace th e
membrane
keyboard
Keyboard