A laser diode assembly for an optical pickup includes a laser diode, a holding member, and a position adjustment member. The door frame is secured to a wall of the enclosure adjacent an access opening. In a preferred embodiment, the light is generated by a laser pointer included in the remote control. A foam resin core material is injected into the structural sandwich panel assembly and allowed to cure. In particular, the liquid washdown dispenser may be connected to a liquid dispensing source for dispensing liquid to wash down the outdoor heat exchanger.