NEC NP4001 - Manual (Page 120)

6. Maintenance
108
To replace the lamp, refer to the following.
1.
Loosen the screw on the lamp
cover (A), and remove the
lamp cover as shown (B).
2.
Loosen the two captive screws
(A) on the lamp module. Lift
the module handle up (B) in
the direction shown.
A
A
B
B
3.
Pull firmly on the module
handle in the direction shown
to remove the lamp.
4.
Reverse steps 1 to 3 to install
the new lamp module and re-
place the lamp cover.
Note:
The filters should be replaced when replacing the lamp modules.