19
(TROUBLE 4) The following visual conditions indicate a probable defective 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 is 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 pressed.
6. Display does not count down or up with time cooking 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. Oven lamp and turntable motor do not stop although cooking is finished. Check if the RELAY 2 contacts are closed.
If they are closed, replace P.C.B main-assembly.
NOTE
Before following the particular steps listed above in the trouble shooting guide for the button of control panel fail-
ure, please check for the continuity of each wire-harness between the P.C.B main-assembly and P.C.B sub-
assembly
CONDITION
CHECK
Check each button for continu-
ity of the keyboard for the fol-
lowing keyboard check proce-
dure
Malfunction of
touch control cir-
cuit of control box
sub-assembly
RESULT
Normal
CAUSE
REMEDY
Replace con-
trol box sub-
assembly
Malfunction of the
keyboard
Abnormal
Replace the
keyborad
Display does
not show
programming
at all, even if
button is
pressed
M/W
DEF.
LOCK
g