9
TROUBLESHOOTING
IF THE FOLLOWING SYMPTOMS APPLY, PLEASE INSTRUCT THE CUSTOMER IN THE PROPER USE OF
CAUTIONS
TROUBLE 1
The following visual conditions indicate a control circuit that may be defective.
Microwave oven
does not work
Inserting many plugs into
one plug outlet and using
them at the same time
(causes overloading).
Microwave oven plug is not
inserted tightly
Output power is too low Low AC input voltage
Food temperature is too low
Using metallic ware and
allowing it to touch the
oven wall
Sparks occurring
Inconsistent intensity of
microwave by their
characteristics
Uneven cooking
Ceramic ware trimmed in
gold or silver powder is used
Avoid using other electrical
appliances when you use the
microwave oven.
Insert microwave oven
plug securely
Use the microwave oven at
adequate line voltage
This may not be a defect.
It is possible that the food
needs to cook for a
longer time period
Do not use metallic ware for
cooking except where noted
in the cooking guide.
Do not use any type
of cookware with
metallic trimming.
Excessive weight on tray or
improperly balanced
Distribute food evenly. Cook
smaller portions and/or use
lighter weight cookware.
Turntable drags or
makes noise
CONDITION CAUSE REMEDY
• Wrap the thinner part
with aluminum foil.
• Use plastic wrap or lid
• Stir once or twice while
cooking soup, cocoa,
milk, etc.
No input can be
programmed
Continuity
No continuity
Defective PCB
assembly
Replace PCB
assembly
Check the conn-
ection between
membrane key
assembly and
PCB assembly
Loose
connection
Connect them
tightly
Some inputs
cannot be
programmed
Everything works
as specified
Still have trouble
Defective key
membrane
assembly
Replace key
membrane
assembly
Replace key
membrane
assembly and
check operation
Display shows a
number or figure
different from
one touched
Random
programming
when touching
other pads
Display is fixed
at some figure
and can not
accept any input
Defective PCB
assembly
Replace PCB
assembly
CONDITION CHECK RESULT CAUSE REMEDY
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