Daewoo KOG-370A0P Service Manual page 23

TROUBLE SHOOTING GUIDE
( TROUBLE 4 ) The following visual conditions indicate a probable defective 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.
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
Malfunction
control circuit
of control box
sub-assembly
Abnormal
Malfunction of
the membrane
22
Combi
M/W Def. Grill
CAUSE REMEDY
Replace
control box
of touch
sub-assembly
Replace the
membrane
keyboard keyboard
Timer/g