Troubleshooting - LG LMVM1955SW Service Manual

C. TROUBLE SHOOTING
WHEN YOU GET A COMPLAINT FROM YOUR CUSTOMER, EVALUATE THE COMPLAINT CAREFULLY. IF THE
FOLLOWING SYMPTOMS APPLY, PLEASE INSTRUCT THE CUSTOMER IN THE PROPER USE OF THE
MICROWAVE OVEN. THIS CAN ELIMINATE AN UNNECESSARY SERVICE CALL.
CAUTIONS
1. Check grounding before checking for trouble.
2. Be careful of the Inverter.
3. When checking the continuity of the switches or the inverter, disconnect lead wires from these parts and
then check continuity with the AC plug removed. To do otherwise may result in a false reading or damage
to your meter.
4. Do not touch any part of the circuit on the PCB since static electric discharge may damage this control
panel.
Always touch yourself to ground while working on this panel to discharge any static charge built up in your
body. (Micom model only)
CONDITION
Microwave oven
does not work.
Sparks occur.
Uneven cooking.
CAUSE
Inserting many plugs into one
outlet and using them at the
same time.
(blown fuse or breaker)
Microwave oven plug is not
inserted tightly.
Using metallic ware and
allowing it to touch the oven
wall.
Ceramic ware trimmed in
gold or silver powder is used.
Inconsistent intensity of
microwave by their
characteristics.
7-20
REMEDY
Avoid using other electrical
appliances when you use the
microwave oven.
Insert microwave oven plug
securely.
Do not use metallic ware for
cooking except where noted
in the cooking guide.
Do not use any type of
cookware with metallic
trimming.
1. Use plastic wrap or lid.
2. Stir once or twice while
cooking soup, cocoa or
milk, etc.