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STEP
SEQUENCE
B. TROUBLESHOOTING
0 volt.
Check continuity of Fuse,
Thermal Protector for
Magnetron, Thermal Protector for Cavity and AC Power Cord. If the Fuse is blown, see “E,
on page 13.
Replace it if necessary.
Normal Control Circuit Board.
Correct seating of Connector S101 or
replace Control Circuit Board.
Each resistance
OK.
Resistance incorrect (ON or OFF).
Replace Touch
Key Board.
Normal Touch
Key Board.
Normal Control Circuit Board.
Replace Control Circuit Board.
Voltage incorrect.
Check power supply
voltage on Control Circuit
Board. (See page 5)
Each voltage
OK.
Touch Key Board.
Check resistance of Touch Key Board.
(See page 6)
240 volts.
Check 240 V
A
C
power supply
of connector S1 between Pin 1 and Pin 3 after removing Connector S1 from Control
Circuit Board.
(1) PROBLEM No display or mis-display in the display window by touching the keys.
a
b
RESULT
PROBLEM 1-b
Runs
Runs
Runs
Runs
Control Circuit
Board.
