COMPONENT CHECKOUT PROCEDURE RESULTS
Measure the resistance : Across two terminals with an
ohm-meter on its highest scale.
Normal reading :
Indicates continuity.
Abnormal reading :
Indicates infinite ohms.
Measure the voltage : Between test points TP-1,TP-2
and ground. ( See control circuit board on page 24 ).
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
Figure 10
-8-
HV FUSE
Test TP-1 TP-2
point
Voltage -5V -15V
DC DC
CONTROL
CIRCUIT
BOARD
COMPLETE
Measure the resistance between terminals of FPC
connector after removing it from S101. ( See Figure
11).
NOTE
- 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
TERMINALS OF FPC CONNECTOR
Figure 11
When When not
Resistance touched touched
Value
Less than More than
1K Ohms 1 MEG
Ω
When checking the "
START
" key, con-
nect Ohmmeter as illustration below.
6
7
8
9
10
5
4
3
2
1
Clear/
Grill
Quick
Auto
Baked
Stop
Start
Defrost
Potato
Micro
Convec
Casserole
Chicken
Power
Temp
Pieces
Up
Dual
Kitchen
Frozen
Cake/
Cook
Timer
Pizza
Pudding
Down
Slow
More/
Baked
Snacks
Cook
Less
Fish
Start
Chops/
Roast
Steaks
Joint
T OP
A3
A4
A5
C1
C2
C3
A1
A2
C4
C5
Ohm-meter
1
2
3
4
5
6
7
8
9
10
