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(TROUBLE 6) The Following visual conditions indicate a probable defective touch control Circuit
or button P.C.B assembly
1. incomplete segments.
1) segment missing
2) partial segments missing
3) digit flickering other than normal fluorescent slight flickering
2. A distinct change in the brightness of one or
more numbers exists in the display
3. One or more digits in the display are not on
when they should be.
4. Display does not count down or up with time cooking or
clock operation.
5. Oven is programable and cooks normally but no display shows.
6. Display obviously jumps in time while counting down.
7. display counts down noticeably too fast while cooking.
8.Display does not show the time of day when clear button is touched.
9.Oven lamp and turn table motor do not stop although cooking is finished.
Check if the RELAY(RY4) contacts close and if they are close, replace touch control circuit.
CONDITION CHECK RESULT CAUSE REMEDY
Display does
Not show
Programming
At all. Even if
button is
Touched.
Check each button
For continuity of the
Button
Normal Malfunction
Of touch
Control
circuit of
Control box
sub-assembly
Replace
control box
sub-assembly
TROUBLE 5) Bottom heater is not heated; food will not become hot.
CONDITION CHECK RESULT CAUSE REMEDY
Bottom
heater is
not heated.
Check continuity of
Primary interlock switch
No
Continuity
Malfunction Of
primary Interlock
switch
Adjust or
Replace
Check continuity of
secondary interlock
switch
No
Continuity
Malfunction
Of secondary
interlock switch
Adjust or
replace
Check continuity of
heater
No
continuity
Check D.C voltage
Being supplied to
RELAY (RY7) coil
Defective
heater
0V
Approx.
24V DC
Defective
Touch control
circuit
Faulty contacts
of RELAY
(RY7) or open
relay coil
Replace
Replace
Replace