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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
CONTROL
and ground ( See control circuit board on page 24 ).
CIRCUIT
BOARD
Proceed with the check of the step down transformer, to
see if any one of the measured values is different from the
COMPLETE
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.
TOUCH KEY
BOARD
5
CLEAR/
6
GRILL
STOP
MICRO
CONVEC.
7
POWER
TEMP
DUAL
8
COOK
9
10
START
CHECKOUT PROCEDURE
NOTE
NOTE
MATRIX CIRCUIT FOR TOUCH
KEYBOARD FPC CONNECTOR
4
3
QUICK
START
DEFROST
KITCHEN
TIMER
MORE/
LESS
REHEAT
Figure 10
1
2
AUTO
POTATO
CHICKEN
PIZZA
FISH
MEAT
-8-
RESULTS
Normal reading :
Indicates continuity.
Abnormal reading :
Indicates infinite ohms.
Test
point
Voltage -5V -15V
When
Resistance
touched
Value
Less than
1K Ohms
When checking the "START" key, con-
nect Ohmmeter as illustration below.
TOP
A1
1
A2
2
3
A3
4
A4
5
A5
6
C1
7
C2
8
C3
C4
9
C5
10
TERMINALS OF FPC CONNECTOR
TP-1 TP-2
DC
DC
When not
touched
More than
1 MEG Ω
Ohm-meter
Figure 11
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