Frigidaire MFM-6D Service Manual page 37

2. Type of encoding and pad names.
E D
9 8
F
4 3
G
H
I
J
STOP/
CLOCK DEFROST COOK
CLEAR
K
Fig. 8 Key Matrix (MFM-6D)
The membrane keyboard consists of 15 keys (MFM-6D), 25 keys (MFM-7DTP) whose configurations are
described in Fig. 8 and provide 11 pad terminations to be connected to the touch control circuit as Fig. 7
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.
1. MFM-6D
1) 9
2) 8
3) 7
4) 6
5) 5
6) 4
7) 3
8) 2
1. MFM-7DTP
1) 9
2) 8
3) 7
4) 6
5) 5
6) 4
7) 3
8) 2
9) 1
10) 0
11) STOP/CLEAR
12) TIME
13) DEFROST (LOW)
C B A
7 6 5
2 1 0
START
pad : Between F and E
pad : Between F and D
pad : Between F and C
pad : Between F and B
pad : Between F and A
pad : Between G and E
pad : Between G and D
pad : Between G and C
pad : Between F and E
pad : Between F and D
pad : Between F and C
pad : Between F and B
pad : Between F and A
pad : Between G and E
pad : Between G and D
pad : Between G and C
pad : Between G and B
pad : Between G and A
pad : Between K and E
pad : Between K and D
pad : Between K and C
E D
9 8
F
4 3
G
DINNER
PLATE
H
POPCORN FROZEN
PIZZA
I
START AM/PM
J
TIME
STOP/
CLEAR
K
Fig. 8 Key Matrix (MFM-7DTP)
9) 1
10) 0
11) STOP/CLEAR
12) CLOCK
13) DEFROST
14) COOK
15) START
14) COOK (MED)
15) START
16) COOK (HIGH)
17) AM/PM
18) ALARM
19) ALARM STOP
20) POPCORN
21) FROEN PIZZA
22) BEVERAGE
23) QUICK ON
24) DINNER PLATE
25) BAKED POTATO
C B
7 6 5
2 1 0
BAKED
POTATO
BEVERAGE
QUICK
SOUP
ON
ALARM ALARM
STOP
DEFROST COOK START
(LOW) (MED) (HIGH)
pad : Between G and B
pad : Between G and A
pad : Between K and E
pad : Between K and D
pad : Between K and C
pad : Between K and B
pad : Between K and A
pad : Between K and B
pad : Between J and E
Pad : Between K and A
Pad : Between J and D
Pad : Between J and C
Pad : Between J and A
Pad : Between I and E
Pad : Between I and D
Pad : Between I and C
Pad : Between I and A
Pad : Between I and D
Pad : Between I and A
A
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