Goldstar MV-1525W Service Manual page 28

COMPONENTS
TOUCH KEY
BOARD
RESISTOR
CIMENT
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)
1 2 3
FROZEN FAN(VENT)
POPCORN HELP
VEGETABLE
HI/LO/OFF
8
FROZEN LIGHT CUSTOM
POTATO
ENTREE SET
HI/LO/OFF
9
DINNER
EZ on CLOCK
BEVERAGE
PLATE
10
FRESH
LIGHT
CASSEROLE N.C
VEGETABLE TIMER
11
STOP/
PIZZA RICE START
CLEAR
12
SOUP/
BACON CUSTOM LESS
SAUCE
COOK
13
Figure 30
Measure the resistance
Figure 32
Resistance
4 5 6 7
N.C 5 0
DEFROST
6 1
KITCHEN
7 2
TIMER
POWER
8 3
HOLD
9 4
WARM
TURNTABLE
MORE N.C
ON/OFF
Normal reading:
Abnormal reading:
7-17
RESULTS
When When not
touched touched
value
Less than More than
400 ohms 1 mega ohm
FPC CONNECTOR
Top
Figure 31
Approx. 15 ohm
Infinite
1
2
3
4
5
6
7
8
9
10
11
12
13