Daewoo KOR-164H0A Service Manual page 21

( 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 diplay are not on when they
numbers is the display.
3. One or more digits in the diplay 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.
CON DITION
D isplay does
not show
program m ing
at all, even if
keyboard is
touched.
NOTE
Before following the particular steps listed above in the trouble shooting guide for the membrane keyboardís,
failure, please check for the continuity of each wire-harness between the membrane keyboard and P.C.B.
assembly.
CHECK RE
C heck each pad for
continuity of the
m em brane keyboard
for the follow ing
keyboard check
proce dure
SULT
N orm al
M alfunction
control circuit
of control box
sub-a ssem bly
A bnorm al
M alfunction of
the m em brane
20
CAUSE REM EDY
R eplace
control box
of touch
sub-a ssem bly
R eplace the
m em brane
keyboard keyboard