20
(TROUBLE 4)
The following visual conditions indicate a probable defective touch 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 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 the STOP/CLEAR button is pushed. (in case of setting the present time)
11. Oven lamp and turntable motor do not stop although cooking is finished. Check if the RELAY 2 contacts close.
If they close, replace P.C.B assembly.
NOTE
Before following the particular steps listed above in the troubleshooting guide for the failure of membrane key-
board, please check for the continuity of each wire-harness between the membrane keyboard and P.C.B.
assembly.
CONDITION
CHECK
Check each pad for
continuity of the membrane
keyboard for the following key-
board check procedure
Malfunction
of the control cir-
cuit board
RESULT
Normal
CAUSE
REMEDY
Replace the
control circuit
board
Malfunction
of the membrane
keyboard
Abnormal
Replace the
membrane
keyboard
Display does
not show
programming
at all, even if
keyboard is
touched.
Summary of Contents for KOR-8CBB5W
Page 5: ...4 EXTERNAL VIEW 1 OUTER DIMENSION...
Page 25: ...24 WIRING DIAGRAM...
Page 27: ...26 Measure Point MP1 MP2 GND...
Page 29: ...28 2 PCB CIRCUIT DIAGRAM...