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COMPONENT
Measure the resistance : Across two terminals with an
ohm-meter on its highest scale.
HV FUSE
Measure the voltage : Between test points TP-1,TP-2,TP-3,
CONTROL
TP-4, TP-5 and ground or between TP-6 and TP-7 (See
CIRCUIT
control circuit board on page 26 ).
BOARD
COMPLETE
Proceed with the check of the step down transformer, to
see if any one of the measured values is different from the
specified values
Measure the resistance between terminals of FPC
connector after removing it from S101. ( See Figure
11).
- When reconnecting the FPC connector, make sure
the holes on the connector are properly inserted in
hooks of the plastic fastener in S101.
MATRIX CIRCUIT FOR TOUCH
KEYBOARD FPC CONNECTOR
TOUCH KEY
BOARD
5
4
MICRO
10
POWER
CONVEC.
9
TEMP
GRILL
8
START
7
DUAL
CLEAR/
SLOW
6
STOP
COOK
CHECKOUT PROCEDURE
NOTE
NOTE
3
1
2
BAKED
WEIGH
SNACKS
POTATO
DISH
AUTO
ROAST
FISH
DEFROST
CHICKEN
MORE/
ROAST
REHEAT
LESS
MEAT JOINT
CAKE/
PIZZA
PUDDING
CASSE-
ROLE
-8-
RESULTS
Normal reading :
Indicates continuity.
Abnormal reading :
Indicates infinite ohms.
Figure 10
Test
TP-1 TP-2 TP-3 TP-4
point
Voltage -5V -15V -30V -35V
DC
Test
TP-5 TP-6/
point
TP-7
Voltage -29V 2.0V
DC
When
Resistance
touched
Value
Less than
1K Ohms
When checking the "START" key, con-
nect Ohmmeter as illustration below.
TOP
1
A1
A2
2
3
A3
4
A4
5
A5
6
C1
7
C2
8
C3
C4
9
C5
10
TERMINALS OF FPC CONNECTOR
DC
DC
AC
DC
When not
touched
More than
1 MEG Ω
Ohm-meter
Figure 11
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