NEC LT240K - Manual (Page 123)

E-123
MAINTENANCE
4. Insert a new lamp housing until the lamp housing is plugged into the
socket.
CAUTION
Do not use a lamp other than the NEC replacement lamp (LT60LPK).
5. Secure it in place with the two screws.
Be sure to tighten the screws.
6. Reattach the lamp cover.
7. Tighten the lamp cover screw.
Be sure to tighten the screw.