36
The membrane keyboard consists of 26 keys whose configurations are described in Fig. 8-1 and provide 11
pad terminations to be connected to the touch control circuit as Fig. 7-1
3. Key check procedure.
To determine if the membrane keyboard is defective or not, check the continuity of each pad (KEY) contacts
with a multimeter.
KOR-121Q0A/Q1A
F
G
H
I
J
K
E
D
C
B
A
9
8
7
6
5
4
3
2
1
0
DINNER
PLATE
SOUP
POWER
POPCORN
BAKED
POTATO
FRESH
VEGETABLE
FROZEN
PIZZA
BEVERAGE
MUFFIN
SPEEDY
COOK
START
LESS
MORE
STOP/
CLEAR
CLOCK/
A.START
AUTO
DEFROST
Fig. 8-1 Key Matrix
1) 5
pad : Between A and F
2) 0
pad : Between A and G
3) POWER
pad : Between A and H
4) SPEEDY COOK
pad : Between A and I
5) 6
pad : Between B and F
6) 1
pad : Between B and G
7) SOUP
pad : Between B and H
8) MUFFIN
pad : Between B and I
9) 7
pad : Between C and F
10) 2
pad : Between C and G
11) FRESH VEGETABLE pad : Between C and H
12) BEVERAGE
pad : Between C and I
13) MORE
pad : Between C and J
14) AUTO DEFROST
pad : Between C and K
15) 8
pad : Between D and F
16) 3
pad : Between D and G
17) DINNER PLATE
pad : Between D and H
18) FROZEN PIZZA
pad : Between D and I
19) LESS
pad : Between D and J
20) CLOCK/A.START
pad : Between D and K
21) 9
pad : Between E and F
22) 4
pad : Between E and G
23) BAKED POTATO
pad : Between E and H
24) POPCORN
pad : Between E and I
25) START
pad : Between E and J
26) STOP/CLEAR
pad : Between E and K