Where is the mica plate in the microwave oven?
If it is inconvenient to remove it, the detachable shell and the magnetron in the position can be easily removed.
Open the microwave oven door, facing the right wall of the furnace cavity, there is a light colored square (or rectangular block), that is, mica.
Thoroughly clean the furnace cavity dirt, according to specifications to the parts store to buy back, new change back.
