Jwin JX-DVD400 - Manual (Page 15)

Moisture condensation occurs during the following
cases:
*When you bring the DVD player directly from a cold
place to a warm place.
*When you use the DVD player in a room where you just
turned on the heater, or a place where the cold wind from
the air conditioner directly hits the unit.
*In summer, when you use the DVD player in a hot and
humid place just after you move the unit from an air
conditioned room.
*When you use the DVD player in a humid place.
Do not use the DVD player when moisture condensation
may occur:
*If you use the DVD player in such a situation, it may
damage discs and internal parts. Remove the disc,
connect the power cord of the player to the wall outlet,
turn on the DVD player, and leave it for two or three
hours. After two or three hours, the DVD player will
have warmed up and evaporated any moisture. Keep
the DVD player connected to the wall outlet and moisture
condensation will seldom occur.