LG LMVM2277ST Product Training Manual page 125

Microwave Power
Note:
Power output measurements should never be made on
microwave ovens operating on less than 108 VAC. Below
this point the power output drops sharply in an
unpredictable manner. Likewise, operating an oven at
voltages greater than 132 VAC should be avoided as
damage to components may occur due to excessive
electrical pressure.
T-35
LMVM2277ST
125