NEC Projector Vt37 User Manual

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

 Cleaning or Replacing the Filter
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 filter is dirty or clogged, your projector may overheat.
CAUTION
•Turn off the projector, turn off the main power switch and unplug the projector before replacing the filter.
•Only clean the outside of the filter cover with a vacuum cleaner.
•Do not attempt to operate the projector without the filter cover.
To clean the air-filter:
Vacuum the filter-through the filter cover.
To reset the filter usage time, from the menu, select [Default] → [Clear Filter Usage].
See also page 43 for resetting the filter usage time.
To replace the filter (sponge):
1. Remove the filter cover by pushing down on the catch of the cover until you feel it detach.
Catch
2. Gently peel off the filter (sponge) and replace it with the new one. 
						

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6. Maintenance
3. Reinstall the new filter cover.
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 filter. The filter comes in the same package with your replacement
lamp.
 Cleaning the Cabinet and the Lens
1. Turn off the projector before cleaning.
2. 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.
3. Use a blower or lens paper to clean the lens, and be careful not to scratch or mar the lens.
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6. Maintenance
2. Use a Philips screwdriver to push and release the tab.
Push up and remove the lamp cover.
CatchPhilips
screwdriver

 Replacing the Lamp
After your lamp has been operating for 3000 hours (up to 4000 hours in Eco mode) or longer, the LAMP indicator in the
cabinet will blink red and the message “The lamp has reached the end of its usable life. Please replace the lamp.”
will appear. Even though the lamp may still be working, replace it at 3000 (up to 4000 hours in Eco mode) hours to
maintain optimal projector performance. After replacing the lamp, be sure to clear the lamp hour meter. See page 43.
CAUTION
•DO NOT TOUCH THE LAMP immediately after it has been used. It will be extremely hot. Turn the projector off,
wait 30 seconds, turn off the main power switch and then disconnect the power cable. Allow at least one hour
for the lamp to cool before handling.
•DO NOT REMOVE ANY SCREWS except two lamp case screws. You could receive an electric shock.
•Do not break the glass on the lamp housing.
Keep finger prints off the glass surface on the lamp housing. Leaving finger prints in the glass surface might
cause an unwanted shadow and poor picture quality.
•The projector will turn off and go into standby mode after 3100 (up to 4100 hours in Eco mode) hours of service.
If this happens, be sure to replace the lamp. If you continue to use the lamp after 3000 hours (up to 4000 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 replace-
ment.
To replace the lamp:
 Optional lamp and tools needed for replacement:
•Replacement lamp VT70LP
•Phillips screwdriver or equivalent
1. Place the projector on a soft cloth and turn it over to access the lamp cover on the bottom. 
						

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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.
6. Maintenance
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 VT70LP.
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.
Interlock 
						

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6. Maintenance
6. Connect the supplied power cable, turn on the Main Power switch and turn on the projector.
7. Finally, select the menu 
→ [Default] → [Clear Lamp Hour Meter] to reset the lamp usage hours.
NOTE: When the lamp exceeds 3100 hours (up to 4100 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 ten seconds to reset the lamp clock back to zero.
When the lamp time clock is reset to zero, the LAMP indicator goes out. 
						

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7. Appendix

 Troubleshooting
This section helps you resolve problems you may encounter while setting up or using the projector.
Indicator Messages
Power Indicator
Indicator Condition
Projector Condition Note
Off
Blinking light
Steady lightGreen
Orange
Green
Orange0.5 sec On,
0.5 sec Off
2.5 sec On,
0.5 sec Off
0.5 sec On,
0.5 sec OffThe main power is off
The projector is getting ready to turn on.
Off Timer is enabled.
The projector is cooling down.
The projector is turned on.
The projector is in Standby.–
Wait for a moment.
–
Wait for a moment.
–
–
Status Indicator
Indicator Condition
Projector Condition Note
Off
Blinking light
Steady lightRed
Green
Orange1 cycle (0.5 sec On,
2.5 sec Off)
2 cycle (0.5 sec On,
0.5 sec Off)
4 cycle (0.5 sec On,
0.5 sec Off)
6 cycle (0.5 sec On,
0.5 sec Off)Normal
Lamp cover error or lamp housing error
Temperature error
Fan error
Lamp error
Re-firing the lamp (The projector is cool-
ing down.)
Cabinet button is locked–
Replace the lamp cover or lamp
housing correctly.
The projector is overheated. Move
the projector to a cooler location.
Fans will not work correctly.
Lamp fails to light. Wait a full
minute and then turn on again.
The projector is re-firing.
Wait for a moment.
You have pressed cabinet button
when Cabinet Button is locked.
Lamp Indicator
Indicator Condition
Projector Condition Note
Off
Blinking light
Steady lightNormal
Lamp has reached its end of life. Lamp
replacement message will be displayed.
Lamp has been used beyond its limit. The
projector will not turn on until the lamp is
replaced.
Lamp mode is set to Eco mode Red
Red
Green–
Replace the lamp.
Replace the lamp.
– 
						

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7. Appendix
Common Problems & Solutions (See also Power/Status/Lamp Indicator on page 49.)
Does not turn on
Will turn off
No picture
Picture suddenly
becomes dark
Color tone or hue is
unusual
Image isn’t square to
the screen
Picture is blurred
Image is scrolling
vertically, horizontally
or both
Remote control does
not work
Indicator is lit or
blinking
Cross color in RGB
mode•Check that the power cable is plugged in and that the power button on the projector cabinet or the remote
control is on. See pages 18 and 19.
•Ensure that the lamp cover is installed correctly. See page 47.
•Check to see if the projector has overheated or the lamp usage exceeds 3100 hours (up to 4100 hours : Eco
mode). If there is insufficient ventilation around the projector or if the room where you’re presenting is par-
ticularly warm, move the projector to a cooler location.
•The lamp may fail to light. Wait a full minute and then turn on the power again.
•The lamp has reached the end of its usable life. Replace the lamp.
•Ensure that the Power Management is off. See page 41.
•Use the VIDEO, the S-VIDEO or the COMPUTER button on the remote control to select your source (Computer,
Video or S-Video). See page 21. If there is still no picture, press the button again.
•Ensure your cables are connected properly.
•Use menus to adjust the brightness and contrast. See page 34.
•Remove the lens cap.
•Reset the settings or adjustments to factory preset levels using the “Default” in the Menu. See page 43.
•Enter your registered keyword if the Security function is enabled. See page 38.
•When using with a notebook PC, be sure to connect between the projector and the notebook PC before turning
on the power to the notebook PC. In most cases signal cannot be output from RGB output unless the notebook
PC is turned on after connecting with the projector.
*If the screen goes blank while using your remote control, it may be the result of the computers screen-
saver or power management software.
•See also the next page.
•When one of the following happens, the Lamp mode automatically changes from Normal to Eco.
*When there are no signals (blue or black screen) → To return to the Normal mode, select another available
source.
*When the image is muted using the PIC-MUTE button on the remote control → Press the PIC-MUTE button
again to return to the Normal mode.
*When the room where you re presenting is particularly warm → Move the projector to a cooler location.
•Check if an appropriate color is selected in Wall Color. If so, select an appropriate option. See page 33.
•Adjust Hue in Picture. See page 34.
•Reposition the projector to improve its angle to the screen. See page 22.
•Use the Keystone correction function to correct the trapezoid distortion. See page 24.
•Adjust the focus. See page 23.
•Reposition the projector to improve its angle to the screen. See page 22.
•Ensure that the distance between the projector and screen is within the adjustment range of the lens. See page
11.
•Condensation may form on the lens if the projector is cold, brought into a warm place and is then turned on.
Should this happen, let the projector stand until there is no condensation on the lens.
•Use the VIDEO, the S-VIDEO or the COMPUTER button on the remote control to select your source (Video, S-
Video or Computer).
See page 21.
•Adjust the computer image manually with the Horizontal/Vertical in the “Advanced → Page 2”. See page 41.
•Install new batteries. See page 10.
•Make sure there are no obstacles between you and the projector.
•Stand within 22 feet (7 m) of the projector. See page 10.
•See the POWER/STATUS/LAMP Indicator on page 49.
•Press the AUTO ADJ. button on the projector cabinet or the remote control. See page 25.
•When “Off” is selected in Auto Adjust, adjust the computer image manually with Clock/Phase in “Advanced →
Page 2” in the menu. See pages 41 and 42.
Problem Check These  Items
For more information contact your dealer. 
						

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7. Appendix
If there is no picture, or the picture is not displayed correctly.
•Power on process for the projector and the PC.
Be sure to connect the RGB cable between the projector and the computer before turning on the computer.
There are some notebook PCs, which do not output signal unless there is a projector or monitor connected first.
NOTE: You can check the horizontal frequency of the current signal in the projector’s menu under Information.  If it reads
“0kHz”, this means there is no signal being output from the computer. See page 42 or go to next step.
•Enabling the computer’s external display.
Displaying an image on the notebook PC’s screen does not necessarily mean it outputs a signal to the projec-
tor.  When using a PC compatible laptop, a combination of function keys will enable/disable the external display.
Usually, the combination of the ‘Fn” key along with one of the 12 function keys gets the external display to come
on or off.  For example, NEC laptops use Fn + F3, while Dell laptops use Fn + F8 key combinations to toggle
through external display selections.
•Non-standard signal output from the computer
If the output signal from a notebook PC is not an industry standard, the projected image may not be displayed
correctly. Should this happen, deactivate the notebook PC’s LCD screen when the projector display is in use.
Each notebook PC has a different way of deactivate/reactivate the local LCD screens as described in the
previous step. Refer to your computer’s documentation for detailed information.
•Image displayed is incorrect when using a Macintosh
When using a Macintosh with the projector, set the DIPswitch of the Mac adapter (not supplied with the projec-
tor) according to your resolution. After setting, restart your Macintosh for the changes to take affect.
For setting display modes other than those supported by your Macintosh and the projector, changing the DIP
switch on a Mac adapter may bounce an image slightly or may display nothing. Should this happen, set the DIP
switch to the 13” fixed mode and then restart your Macintosh. After that, restore the DIP switches to a
displayable mode and then restart the Macintosh again.
NOTE: A Video Adapter cable manufactured by Apple Computer is needed for a PowerBook which does not have a mini D-Sub
15-pin connector.
•Mirroring on a PowerBook
*When using the projector with a Macintosh PowerBook, output may not be set to 1024 x 768 unless “mirror-
ing” is off on your PowerBook. Refer to owner’s manual supplied with your Macintosh computer for mirroring.
•Folders or icons are hidden on the Macintosh screen
Folders or icons may not be seen on the screen. Should this happen, select [View] → [Arrange] from the Apple
menu and arrange icons. 
						

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7. Appendix
 Specifications
This section provides technical information about the VT37 Projectors performance.
Model Number VT37
Optical
LCD Panel 0.7 p-Si TFT active-matrix
Resolution 800 
 600 pixels* native, up to SXGA with Advanced AccuBlend
Lens Digital zoom and manual focus
F2.0     f=17.5 mm
Lamp 130W DC lamp (110W  Eco mode)
Image Size (Diagonal) 25 - 300 inches / 0.6 - 7.6 m
Projection Distance 1.9 - 23.92 ft / 0.58 - 7.3 m
Projection Angle 14.0° - 14.6°
Keystone Correction (Manual) +/- 30° Vertical
Electrical
Inputs 1 RGB/Component (D-Sub 15 Pin), 1 S-Video (DIN 4 Pin),
1 Video (RCA), 1 (L/R) RCA Audio, 1 Stereo Mini Audio,
1 PC Control (DIN 8 Pin)
Video Compatibility NTSC, NTSC4.43, PAL, PAL-60, PAL-N, PAL-M, SECAM,
HDTV: 1080i, 1080i/50Hz, 720p, 576p, 480p, 480i/60Hz
Scan Rate Horizontal: 15 kHz to 100 kHz (RGB: 24 kHz or over)
Vertical: 50 Hz to 120 Hz
Video Bandwidth RGB: 80 MHz (-3dB)
Color Reproduction 16.7 million colors simultaneously, Full color
Horizontal Resolution NTSC / NTSC4.43/PAL/PAL-M/PAL-N/PAL60: 540 TV lines
SECAM: 300 TV lines
YCbCr: 800 TV lines
RGB: 800 dots (H)
600 dots (V)
External Control RS232, IR
Sync Compatibility Separate Sync / Composite Sync / Sync on G
Built-in Speaker 1W (monaural)
Power Requirement 100 - 240V AC, 50 / 60 Hz
Input Current 2.1 - 1.2A
Power Consumption 8W in Standby mode /
190W in Lamp Normal mode / 155W in Lamp Eco mode
* Effective pixels are more than 99.99%. 
						

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7. Appendix
Mechanical
Installation Orientation Desktop/Front, Desktop/Rear, Ceiling/Front, Ceiling/Rear
Dimensions 11.6 (W)
3.7 (H)
10.2 (D)
294mm (W)
93mm (H)
260mm (D)
(not including protrusions)
Net Weight 6.5 lbs / 2.9 kg
Environmental Considerations Operational Temperatures : 41° to 95°F (5° to 35°C),
20% to 80% humidity (non-condensing)
Storage Temperatures : 14° to 122°F (-10° to 50°C),
20% to 80% humidity (non-condensing)
Regulations
For United States:
UL Approved (UL 60950)
Meets FCC Class B requirements
For Canada:
UL Approved (CSA 60950)
Meets DOC Canada Class B requirements
For Australia/New Zealand:
Meets AS/NZS CISPR.22 Class B
For Europe:
Meets EMC Directive (EN55022, EN55024, EN61000-3-2, EN61000-3-3)
Meets Low Voltage Directive (EN60950, TUV GS Approved)
For additional information visit:
US : http://www.necvisualsystems.com
Europe : http://www.neceurope.com/
Global : http://www.nec-pj.com/
The specifications are subject to change without notice.