NEC Vt770 Projector User Manual

							101
 Menu Descriptions & Functions [Reset]
Returning to Factory Default
The Reset feature allows you to change adjustments and settings to the factory preset for sources by the following
methods:
Current Signal
Resets the adjustments for the current signal to the factory preset levels.
All the items in “Adjust (except “Wall Color”) and “Image can be reset.
All Data
Reset all the adjustments and settings for all the signals to the factory preset except Remaining Lamp Time, Lamp
Hour Meter, Filter Usage, Projector Usage, Communication, Language, Background, Entry List, Standby Mode,
Security and Password (Logo).
(To reset the lamp usage time, see “Clear Lamp Hour Meter” on page 98)
All Data (Including Entry List)
Reset all the adjustments and settings for all the signals to the factory preset except Remaining Lamp Time, Lamp
Hour Meter, Filter Usage, Projector Usage, Communication, Language, Background, Entry List, Standby Mode,
Security and Password (Logo).
Also deletes all the signals in the Entry List and returns to the factory preset.
NOTE: Locked signals in Entry List cannot be reset.
7. Using On-Screen Menu 
						

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	 Entry List
Displaying the Entry List
Press the SOURCE button to display the list of the entry signals. Use the SELECT 
 buttons on your remote control
or the projector cabinet to select the signal and press the ENTER button on the remote control or the projector cabinet
to display the Entry Edit Command screen.
Entering the Currently Projected Signal into the Entry List
1. Display the Entry List.
2. Use the SELECT 

 or  button on your remote control or the projector cabinet to select any number and
press the ENTER button on the remote control or the projector cabinet to display the Entry Edit Com-
mand screen.
3. Use the SELECT 
 or  button to select Store and press the ENTER button.
Using the Entry List
Making any adjustments to the current picture will automatically register its adjustments to the Entry List. The regis-
tered signal can be loaded any time from the Entry List.
NOTE: Up to 100 presets can be registered except settings on the Picture.
7. Using On-Screen Menu 
						

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7. Using On-Screen Menu
Entry Edit Command
You can edit signals on the Entry List.
Load ...................... Enables you to select a signal from the list.
Store ..................... Enables you to store the currently projected signal.
Cut ........................ Enables you to remove a selected signal from the list and place it on the clipboard in the projector.
Copy ...................... Enables you to copy a selected signal from the list and place it on the clipboard in the projector.
Paste ..................... Enables you to paste the signal placed on the clipboard to any other line of the list. To do this, select Paste
and then select the line number you want to paste to. Last press ENTER.
Edit ........................ Enables you to change source names.
Source Name:
Enter a signal name. Up to 18 alphanumeric characters can be used.
Input Terminal:
Change the input terminal. Video and S-Video are available for composite signal. Component and Computer
are available for component signal.
Lock:
Set so that the selected signal cannot be deleted when All Delete is executed.
Skip:
Set so that the selected signal will be skipped during auto search.
When complete, select OK and press ENTER. To exit without storing setting, select Cancel. Select Source
Name and press ENTER to display the Source Name Edit window. You can change source name on this
window. Press  to display the software keyboard, which you can enter alphanumeric characters. See page
120 for the key function of the software keyboard.
All Delete ............... This feature enables you to delete all the registered signals in the Entry List.
The following buttons are not available for the currently projecting signals:
1) The Cut and Paste buttons on the Entry Edit Command screen
2) The Input Terminal button on the Entry Edit screen
NOTE: When all the signals in the Entry List are deleted, the currently projected signal will be also deleted except locked signals. 
						

							104
8
Maintenance
○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○

  Cleaning the Filters ................................................. 105
  Cleaning the Cabinet .............................................. 105
  Cleaning the Lens ................................................... 106
  Replacing the Lamp and Filters .............................. 107 
						

							105
8. Maintenance
This section describes the simple maintenance procedures you should follow to clean the filter and replace the lamp.

 Cleaning the Filters
The air-filter sponge keeps dust and dirt from getting inside the projector and should be cleaned after every 100 hours
of operation (more often in dusty conditions). If the filters are dirty or clogged, your projector may overheat.
CAUTION
•Turn off the projector, turn off the main power switch and unplug the projector before cleaning the filters.
•Only clean the outside of the filter cover with a vacuum cleaner.
1. Vacuum the filter from the outside.
2. Reset the filter usage time.
To reset the filter usage time, from the menu, select [Setup] → [Page 5] → [Filter Usage] → [Clear Filter Usage Meter]
and then press “Clear”.
See also page 98 for resetting the filter usage time.
 Cleaning the Cabinet
CAUTION
Turn off the projector, turn off the main power switch and unplug the projector before cleaning the cabinet.
Clean the cabinet periodically with a damp cloth. If heavily soiled, use a mild detergent. Never use strong
detergents or solvents such as alcohol or thinner.
ZOOM F
O
C
U
S 
3D
 R
EFO
R
M SO
UR
C
E
SELEC
T
S
TA
TUS LAM
P 
PC
 C
AR
D P
OW
E
RON/STAND BY AUTO ADJUST
MENUENTERCANCEL
A
C
 IN
COMPONENT
YCb/Pb
Cr/Pr
AUDIO
AUDIO
AUDIOS-VIDEO COMPUTER 1
AUDIO PC CARD
USB(COMPUTER)USB(MOUSE)MONITOR OUT
COMPUTER 2 PC CONTROLL/MONO
VIDEO
R
COMPONENT
YCb/Pb
Cr/Pr
AUDIO
L/MONO
R
PC CARD 3D REFORMSOURCE
STATUSLAMP 
POWERON
/STAND
 BY AUTO
 ADJU
STSELECTMENU
ENTERCANCEL
ZOOM F
O
C
U
S
  
						

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8. Maintenance
 Cleaning the Lens
CAUTION
Turn off the projector, turn off the main power switch and unplug the projector before cleaning lens.
Z
O
O
M
 FOCUS 
3D REFORMSOURCE
SELECT
STATUSLAMP 
PC CARD POWERON/STAND BY AUTO ADJUST
MENUENTERCANCEL
Use a blower or lens paper to clean the lens, and be careful not to scratch the lens. 
						

							107
 Replacing the Lamp and Filters
After your lamp has been operating for 2000 hours (up to 3000 hours in Eco mode) or longer, the LAMP indicator in the
cabinet will blink red and the message will appear. Even though the lamp may still be working, replace it at 2000 (up to
3000 hours in Eco mode) hours to maintain optimal projector performance.
CAUTION
•DO NOT TOUCH THE LAMP immediately after it has been used.
It will be extremely hot. Turn the projector off, wait 10 seconds, turn off the main power switch and then discon-
nect 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 two lamp case screws. You could receive
an electric shock.
•The projector will turn off and go into stand by mode after 2100 (up to 3100 hours in Eco mode) hours of
service. If this happens, be sure to replace the lamp. If you continue to use the lamp after 2000 hours (up to
3000 hours in Eco mode) of use, the lamp bulb may shatter, and pieces of glass may be scattered 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.
8. Maintenance
2. Loosen the two screws securing the lamp housing until the screw-driver goes into a freewheeling
condition. The two screws are not removable.
Remove the lamp housing by pulling out the handle.
NOTE: There is an interlock on this case to prevent the risk of electrical shock. Do not attempt to circumvent this interlock.
STATUS LAMP OWERADJUST
COMPONENT
YCb/PbCr/Pr
AUDIO
AUDIO AUDIO
AUDIOL/MONO
S-VIDEO R 1
R 2R
L/MONO
VIDEOR
STATUSLAMP OWERADJUST
COMPONENT
YCb/PbCr/Pr
AUDIO
AUDIO AUDIO
AUDIOL/MONO
S-VIDEO ER 1
ER 2R
L/MONO VIDEO R12
Catch
STATUS LAMP OWERADJUST
C
O
M
P
O
N
E
N
T
YCb
/P
bC
r/P
r
A
U
D
IO
A
U
D
IO A
U
D
IO
A
U
D
IOL
/M
O
N
O
S
-V
ID
E
O E
R
 1
R
 2R
L
/M
O
N
O V
ID
E
OR
STATUS LAMP POWERADJUST
COMPONENT
YCb/Pb
Cr/Pr
AUDIO
AUDIO AUDIO
AUDIOL/MONO
S-VIDEO ER 1
ER 2R
L/MONO
VIDEO
R
Interlock 
						

							108
3. 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 (VT77LP).
Order this from your NEC dealer.
Secure it in place with the two screws.
Be sure to tighten the screws.
8. Maintenance
4. Reattach the lamp cover.
Tighten the lamp cover screw.
Be sure to tighten the screw.
5. After you install a new lamp, select the menu 
→ [Setup] → [Page 5] → [Lamp Hour] → [Clear Lamp Hour
Meter], and then press “Clear” to clear the lamp usage hours.
NOTE: When the lamp exceeds 2100 hours (up to 3100 hours in Eco mode) of service, the projector cannot turn on and the menu
is not displayed. If this happens, press the Help button on the remote control for a minimum of 10 seconds while in standby
mode. When the lamp time clock is reset to zero, the LAMP indicator goes out.
STATUSLAMP POWERADJUST
COMPONENT
YCb/Pb Cr/Pr
AUDIO
AUDIO AUDIO
AUDIOL/MONO
S-VIDEO ER 1
ER 2R
L/MONO VIDEO R
STATUS LAMP OWERADJUST
COMPO
NENT
YCb/PbCr/Pr
AUDIO
AUD
IO AUDIO
AUDIOL/M
ON
O
S-VIDEO R 1
R
 2R
L/M
ON
O VID
EOR
STATUS LAMP OWERADJUST
COMPONENT
YCb/Pb
Cr/Pr
AUDIO
AUDIO AUDIO
AUDIOL/MONO
S-VIDEO ER 1
ER 2R
L/MONO
VIDEO
R
STATUS LAMP OWERADJUST
COMPONENT
YCb/Pb
Cr/Pr
AUDIO
AUDIO AUDIO
AUDIOL/MONO
S-VIDEO R 1
R 2R
L/MONO
VIDEO
R
Allow about 0.4
(1 cm) of space. 
						

							109
Replacing the Filters
NOTE: Do not wash the filter with soap and water. Soap and water will damage the filter membrane. Before replacing the filter,
remove dust and dirt from the projector cabinet. Keep out dust and dirt during filter replacement.
NOTE: When you replace the lamp, it is also wise to replace the filters. The filters come in the same package with your replace-
ment lamp.
CAUTION
•Turn off the projector, turn off the main power switch and unplug the projector before replacing the filters.
• Do not attempt to operate the projector without the two filter covers.
To replace the filters (sponge)
1. Remove the filter by pushing on the catch and pull it.
8. Maintenance
2. Gently peel off the filter (sponge) and replace it with the new one.
3. Reinstall the new filter cover.
The two filter covers are interchangeable.
To reset the filter usage time, from the menu, select [Setup] → [Page 5] → [Filter Usage] → [Clear Filter Usage Meter].
See also page 98 for resetting the filter usage time.
Catch 
						

							110
9
Appendix
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  Troubleshooting ...................................................... 111
  Specifications ......................................................... 114
  Cabinet Dimensions ............................................... 116
  Pin Assignments of D-Sub COMPUTER 1/2 Input
        Connector ............................................................. 117
  Compatible Input Signal List ................................... 118
  PC Control Codes and Cable Connection .............. 119
  Using Software Keyboard ....................................... 120
  TravelCare Guide .................................................... 121