Measure the voltage : Between test points TP-1,
TP-2, TP-3 or TP-4 and Ground between TP-5
and TP-6. (See Control Circuit Board on page 9).
.
NOTE
- Proceed with the check of the Step-Down
Transformer, to see if any one of the measured
values is different from the specified values.
Test
Voltage
Point
TP-1
-5V
DC
TP-2
-22V
DC
TP-3
-25V
DC
TP-4
-37V
DC
TP-5/
2.0V
TP-6
AC
COMPONENT
CHECKOUT PROCEDURE
RESULT
Measure the resistance between terminals of
FPC connector after removing it from S101.
(Figure 6).
NOTE
- When reconnecting the FPC connector, make
When checking “START” key, connect
sure the holes on the connector are properly
Ohm-Meter as illustration below.
inserted in hooks of the plastic fastener in S101.
MATRIX CIRCUIT FOR
TOUCH KEY BOARD
FPC CONNECTOR
Figure 6
Ohm-Meter
TERMINALS OF FPC CONNECTOR
TOUCH KEY
BOARD
- 4 -
CONTROL
CIRCUIT
BOARD
0
6
5
1
2
3
4
7
8
9
STOP /
CLEAR
POWER
LEVEL
FINE
DEFROST
QUICK
REHEAT
CLOCK
MEAT
START
KITCHEN
TIMER
RICE
QUICK
DEFROST
OPTIONS
MENU
MATCH
MORE +
L ESS --
QUICK
REHEAT
30 SEC.
SOUP
BEVERAGE
POTATO
FISH
FILLET
ADD
30 SEC
FROZEN
VEGETABLE
FRESH
VEGETABLE
When
When not
Resistance
touched
touched
value
Less than More than
1K Ohms 1 MEG Ohms
CUSTOM
PROGRAMS
