Daewoo KOC-621Q0S, Service Manual

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20
(TROUBLE 6)
Lower heater is not heated; food will not become hot.
CONDITION CHECK
Check continuity of
Primary interlock switch
Malfunction of
primary Interlock
switch
RESULT
No
continuity
CAUSE
REMEDY
Adjust or
Replace
Lower heater
Is not heated
Check D.C voltage
Being supplied to
RELAY (RY4) coil
Faulty contacts of
RELAY
(RY4) or open
relay coil
Replace
Check continuity of
secondary interlock
switch
Malfunction of
secondary
interlock switch
No
continuity
Adjust or
replace
Defective
Touch control
circuit
0V
Approx.
13V DC
Replace
Check continuity of
heater
Defective heater
No
continuity
Replace
CONDITION CHECK
Check each pad for continuity
of the pad
Malfunction of
Membrane.
RESULT
Normal
CAUSE REMEDY
Replace
C/PANEL
assembly.
Display does
not show
programming
at all, even if
keyboard is
touched.
(TROUBLE 7)
The following visual conditions indicate a probable defective touch control Circuit or Membrane.
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 programmable 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.
M/W Def. Grill Temp g