STEP
SEQUENCE
RESUL
T
a
Normal control
circuit board
Replace control
circuit board.
Replace Oven
Thermistor
∞
300
Normal
Resistance.
0
∞
Resistance
Incorrect.
Runs
Runs
(10) PROBLEM
No buzzing by touching
keys and at the end of
cooking
a
Runs
Normal control
circuit board
Replace control
circuit board.
-15-
Check resistance of Oven
Thermistor between Pin1
and Pin 3 of connector S201
after removing from control
circuit board
Normal Oven
Thermistor
(9) PROBLEM
Overheating even if the
display window shows
"160C" for preheating.
Check normal operation
of control circuit board
and power circuit board.
NOTES:
- When the oven thermistor circuit is open, the display window will continuously
show "160C" even if the unit becomes overheated by continuous ON of the
heater
.
- When it is short-circuited, the display window will show the set temperature
immediately after the readout of "250C" even if the heater does not turn on.
EM
-S350
