NEC LT84/LT140 - Manual (Page 33)

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4. MAINTENANCE
This section describes the simple maintenance procedures you should
follow to replace the lamp, and replace the coin cell in the remote
control.
Replacing The Lamp
After your lamp has been operating for 1000 hours or longer, the
“Status” light in the cabinet will go on. Even though the lamp may
still be working, replace it at 1000 hours to maintain optimal projec-
tor performance.
CAUTION
• DO NOT TOUCH THE LAMP immediately after it has been
used. It will be extremely hot. Turn off the power to the pro-
jector and disconnect the power cable. Allow at least one hour
for the lamp to cool before handling.
• DO NOT REMOVE ANY SCREWS except the lamp cover
screw and three lamp case screws. You could receive an elec-
tric shock.
• The projector will turn off and go into stand by mode after
1100 hours of service. If this happens, be sure to replace the
lamp. If you continue to use the lamp after 1000 hours of use,
the lamp bulb may shatter, and pieces of glass may be scat-
tered in the lamp case. Do not touch them as the pieces of
glass may cause injury. If this happens, contact your NEC
dealer for lamp replacement.
To replace the lamp:
1. Loosen the lamp cover screw until the screwdriver goes into a free-
wheeling condition and remove the lamp cover. The lamp cover
screw is not removable.
2. Loosen the three screws securing the lamp housing until the screw-
driver goes into a freewheeling condition. The three screws are
not removable.
3. Remove the lamp housing by pulling out the handle.
4. Insert a new lamp housing until the lamp housing is plugged into
the socket.
5. Secure it in place with the three screws.
Be sure to tighten the three screws.
CAUTION: Do not use a lamp other than the NEC replace-
ment lamp (LT40LP).
Order this from your NEC dealer.
6. Reattach the lamp cover.
7. Tighten the lamp cover screw.
Be sure to tighten the lamp cover screw.
8. After you install a new lamp, select [Main Menu]
→
[Projector
Options]
→
[Setup]
→
[Page 2]
→
[Clear Lamp Hour Meter] to re-
set the lamp usage hours.
If the projector will not turn on after 1100 hours of service, press
and hold the “Help” button on the remote control for ten seconds
or longer to reset the lamp time clock to zero.
NOTE: There is an interlock on this case to prevent the risk of elec-
trical shock. Do not attempt to circumvent this interlock.