Daewoo KOR-971M0A Service Manual page 47

(TROUBLE 2) Digital readout display does not show programming, even if the membrane keyboard is
programmed by touching proper pads.
Condition
Display does not
show programming at all,
even if keyboard is
touched.
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NOTE : Before following the particular steps listed above in the trouble shooting guide for the membrane keyboard,
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failure, please check for the continuity of each wire-harness between the membrane keyboard and control
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box assembly.
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MEMBRANE KEYBOARD CHECK PROCEDURE
1. Check the pad termination and PCB Connector order. (KOR-971M, KOR-971Q)
A
B
C
D
E
F
G
H
I
J
K
PAD Termination PCB Connector
Check
Check each pad for
continuity of the
membrane keyboard for
the following keyboard
check procedure.
1
2
3
4
5
frozen
pizza
6
7
Power
8
9
10
Stop/Clear
11
Fig. 10
Result
Normal
Malfunction of
touch control
circuitry of control
box sub-assembly.
Abnormal
Malfunction of the
membrane
keyboard.
STAGE
1 2 WEIGHT TIME
STAGE DEFROST AUTO
LOCK NO CUPS
1 2 WEIGHT TIME START
LOCK NO CUPS g
1. Baked Potato
2, Fresh Vegetable
3. Soup
4. Fish Fillets
Menu
5. Meat Loaf
1. Baked Potato
Weight
2, Fish Vegetable
3. Soup
4. Fish Fillets
frozen
5. Meat Loaf
pizza dinner
plate
muffin
beverage
dinner
plate
o
Power Feeding Bottle
Clock/
Feeding Bottle
A.Start
1
1 2 3
4
4 5 6
7
7 8 9
0
Start
Stop/Clear
KOR-971M
45
Cause Remedy
Replace
control box
sub-
assembly.
Replace the
membrane
keyboard.
DEFROST AUTO
START
STAGE DEFROST
g 1 2 WEIGHT TIME
Menu
LOCK NO CUPS
Weight
MICROWAVE OVEN RANGE
KOR-971Q
Dinner
Beverage
plate
muffin
Soup Muffin
beverage
o
Fresh
o
Vegetable
Clock/
A.Start
Power Feeding Bottle
2 3
1 2
5 6
4 5
8 9
7 8
0
0
Start
Stop/Clear
KOR-971Q
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AUTO
START
g
Frozen
Pizza
Baked
potato
Clock/
A.Start
3
6
9
Start