Key Matrix - Kenmore 721.63682 Service Manual

KEY MATRIX

COMPONENTS
TOUCH KEY
BOARD
TEST PROCEDURES
Measure the resistance between terminal
pins of connector KEY CONNECTOR.
NOTE:
When reconnecting the FPC connector,
make sure that the holes on the FPC
connector are properly engaged with hooks
on the plastic fastener.
MATRIX CIRCUIT FOR
TOUCH KEY BOARD
CONNECTOR(KEY CON)
(For detail matrix circuit of each model,
refer to page 5-2.)
1 2 3
1 2 3 4
8
FROZEN HOLD
N.C N.C
ENTREE
WARM
9
DINNER
N.C N.C N.C
PLATE
10
AUTO AUTO
VEGETABLE POTATO
REHEAT DEFROST
11
AUTO KITCHEN
N.C
N.C
COOK TIMER
12
COOK STOP/
POWER START
TIME CANCEL
13
4 5 6 7
6
5 7
EXPRESS SURE
N.C
SIMMER
DEFROST
SOFTEN MELT
N.C
ADD
POPCORN
PIZZA
MINUTE
MORE LESS
CLOCK
9 0
8
7-18
RESULTS
When
Resistance touched
value
Less than More than
400 ohms 1 mega ohm
FPC CONNECTOR
Top
When not
touched
1
2
3
4
5
6
7
8
9
10
11
12
13