6. Maintenance
3.Loosen the two screws securing the lamp housing until the phillips screwdriver goes into a freewheeling condition. The two screws are not removable.
Remove the lamp housing by holding it.Interlock
NOTE: There is an interlock on this case to prevent the risk of electrical shock. Do not attempt to circumvent this interlock.
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 VT75LP (VT676/VT670/VT470) or VT70LP (VT575/ VT47).
Order this from your NEC dealer.Secure it in place with the two screws.Be sure to tighten the screws.5.Reattach the lamp cover.Slip the lamp cover back until it snaps into place.51