Kelvinator KM-200D, Service Manual, Page: 21 / 35

TROUBLE SHOOTING GUIDE
( TROUBLE 4 ) The following visual conditions indicate a probable defective touch control circuit or m em brane switch
assem bly
1. Incom plete segm ents,
1) Segm ents m issing.
2) Partical segm ents m issing.
3) Digit flickering other than norm al display slight
flickering.
4) “ : 0 ” does not display when power is on.
2. A distinct change in the diplay are not on when they
num bers is the display.
3. O ne or m ore digits in the diplay are not on when they should be.
4. Display indicates a num ber different from one touched.
5. Specific num bers (for exam ple 2 or 3) will not display when the panel is touched.
6. Display does not count down or up with tim e cooking or clock operation.
7. O ven is program m able and cooks norm ally but no display shows.
8. Display obviously jum ps in tim e while counting down.
9. Display counts down noticeably too fast while cooking.
10. Display does not show the tim e of day when clear pad is touched.
11. O ven lam p and turntable m otor do not stop although cooking is finished. Check if the RELAY 2 contacts close if they are
close, replace touch control circuit.
CON DITION
CHECK RESULT CAUSE REM EDY
D isplay does
not show
program m ing
at all, even if
keyboard is
touched.
N orm al
R eplace
control box
sub-a ssem bly
R eplace the
m em brane
keyborad
M alfunction
of touch
control circuit
of control box
sub-a ssem bly
A bnorm al
C heck eac h pad for
continuity of the
m em brane keyboard
for the follow ing
keyboard check
proce dure
M alfunction of
the m em brane
keyboard
NOTE
B efore following the particular steps listed above in the trouble shooting guide for the m em brane keyboard’s, failure,
please check for the continuity of each wire-harness betw een the m em brane keyboard and P.C.B . assem bly.
M /W DE F. Lock
g