NEC Vt670k Projector User Manual

							
44
5. Using On-Screen Menu
Selecting Menu Language [Language]
Y ou can choose one of 21 languages for on-screen instructions.
Selecting Menu Color [Menu Color Select]
You can choose between two color modes for menu color: color and monochrome.
Selecting Menu Display Time [Menu Display Time]
This option allows you to select how long the projector waits after the last touch of a button to turn off the menu.
The preset choices are “Manual”, “Auto 5 sec”, “Auto 15 sec”, and “Auto 45 sec”. The “Auto 45 sec” is the factory
preset.
Selecting a Color or Logo for Background [Background]
Use this feature to display a black/ blue screen or logo when no signal is available.
Selecting Projector Orientation [Orientation]
This sets your image for your type of projection. The options are:
desktop front projection, ceiling rear projection, desktop rear projecti\
on, and ceiling front projection.
Enabling Key Sound and Error Sound [Beep]
This feature turns on or off the keypad sound or alarm when a button on the cabinet and the remote control is pressed
or an error occurs. 
						

							
45
5. Using On-Screen Menu
 Menu Descriptions & Functions [Advanced]
Security
A keyword can be set for your projector to avoid operation by an unauthorized user using the Menu. When a keyword
is set, turning on the projector will display the Keyword input screen. Unless the correct keyword is entered, the
projector cannot project an image.
To  enable the Security function:
1. Select [Advanced] → [Security] and press the  button to select “On”.
The [Keyword] screen will be displayed.
The [Confirm Keyword] screen will be displayed.
2. Type in a combination of the four SELECT buttons 

 and press the ENTER button.
NOTE: A keyword must be four to 10 digits in length. 
						

							
46
5. Using On-Screen Menu
3.Type in the same combination of SELECT buttons 
 and press the ENTER button.
The confirmation screen will be displayed.
4. Select “Yes” and press the ENTER button. The Security function has been enabled.
To disable the Security function:
1. Select [Advanced] → [Security] and press the  button to select “Off”.
2. Type in your keyword and press the ENTER button.
When the correct keyword is entered, the Security function will be disabled.
When the Security function is enabled and the projector is turned on, the projector will display a bluebackground.
To  display an image at this time, press the MENU button to display the Keyword input screen.
The Keyword confirmation screen will be displayed.
Type in the correct keyword and press the ENTER button. The projector will display an image.
NOTE:
• The security disable mode is maintained until the main power is turned o\
ff (by setting the main power switch to “O” or
unplugging the power cable).
• If you forget your keyword, contact your dealer. Your dealer will provide you with your keyword in exchange for your request
code. Your request code is displayed in the Keyword Confirmation screen. In this example “K992-45L8-JNGJ-4XU9-1YAT-
EEA2” is a request code. 
						

							
47
5. Using On-Screen Menu
Disabling the Cabinet Buttons [Cabinet Button Lock]
This option turns on or off the Cabinet Button Lock function.
NOTE: • This Cabinet Button Lock does not affect the remote control and the PC C\
ontrol functions.
• When the cabinet buttons are unlocked, pressing and holding the EXIT but\
ton for about 10 seconds will change the setting to
enable.
• Key symbol  indicates the Cabinet Button Lock is enabled.
Enabling High Speed Fan Mode [Fan Mode]
This option allows you to select two modes for fan speed: High speed mode and Auto mode.
High ...................... The built-in fans run at a fixed high speed.
Auto ...................... The built-in fans automatically run at a variable speed according to the\
 internal temperature.
When you wish to cool down the temperature inside the projector quickly, select “High”.
NOTE: Select “High” if you continue to use the projector for conse\
cutive days.
Selecting Signal Format [Signal Select]
[Computer] Allows you to choose “Computer” for an RGB source such as a computer, or “Component” for a component video
source such as a DVD player. Normally select “RGB/Component” and the projector automatically detects a compo-
nent signal. However there may be some component signals that the projector is unable to detect. If this is the
case, select “Component”. Select “Scart” in Computer 1 (Computer on VT47) for the European Scart signal.
[Video & S-Video System Select] This feature enables you to select composite video standards manually. Normally select “Auto”.
When you select the video standard for Video and S-Video, select the video standard from the pull-down menu.
This must be done for Video and S-Video respectively. 
						

							
48
5. Using On-Screen Menu
(Advanced Page 2)
Enabling Power Management [Power Management]
When this option is on and there is no input for five minutes or more, the projector will automatically turn itself off.
Tu rning On Noise Reduction [Noise Reduction] (not available for Video and S-Video signals)
Reduces video noise. Select “On” to enable the Noise Reduction feature.
Tu rning On Flicker Reduction [Flicker Reduction]
Reduces flicker which can occur in an interlaced signal. This feature is not available for RGB and HDTV signals.
NOTE: When the Flicker Reduction is ON, jagged lines can be visible depe\
nding on the signal. In that case, select OFF.
NOTE: This feature may not be available depending on your video equipment connected to th\
e projector.
Setting Auto Adjust [Auto Adjust]
This feature sets the Auto Adjust mode so that the RGB image can be automatically or manually adjusted for noise
and stability. You can automatically make adjustment in two ways: Normal and Fine
Off ......................... The RGB image will not be automatically adjusted. You can manually optimize the RGB image.
Normal .................. Default setting. The RGB image will be automatically adjusted. Normally \
select this option.
Fine ....................... Select this option if fine adjustment is needed. It takes more time to switch to the source than whe n “Nor-
mal” is selected.
Adjusting Position/Clock (when Auto Adjust is off)
This allows you to manually adjust the image horizontally and vertically, and adjust Clock and Phase.
[Horizontal/Vertical] Adjusts the image location horizontally and vertically.
This adjustment is made automatically when the Auto Adjust is turned on.
[Clock] (available for RGB and HDTV signals only) Use this item with the “Auto Adjust off ” to fine tune the computer image or to remove any vertical banding that
might appear. This function adjusts the clock frequencies that eliminate the horizontal banding in the image. This
adjustment may be necessary when you connect your computer for the first time. This adjustment is made auto-
matically when the Auto Adjust is turned on. 
						

							
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5. Using On-Screen Menu
[Phase] (available for RGB and HDTV signals only)Use this item to adjust the clock phase or to reduce video noise, dot interference or cross talk. (This is evident
when part of your image appears to be shimmering.)
Use “Phase” only after the “Clock” is complete.
This adjustment is made automatically when the Auto Adjust is turned on.
Selecting Communication Speed [Communication Speed]
This feature sets the baud rate of the PC Control port (DIN 8 Pin). It supports data rates from 4800 to 19200 bps.
The default is 19200 bps.
Select the appropriate baud rate for your equipment to be connected (depending on the equipment, a lower baud rate
may be recommended for long cable runs).
 Menu Descriptions & Functions [Information]
Displays the status of the current signal, remaining lamp (%), lamp/filter/p\
rojector usage time (hours) and version
information. The Information has two pages. The Information included is as follows:
[Page 1]
Remaining Lamp Time (%)*
Lamp Hour Meter (H)
Filter Usage
Projector Usage
* The progress indicator shows the percentage of remaining bulb life. The value informs you of the amount of
lamp usage. When the remaining lamp time reaches 0, the Remaining Lamp Time bar indicator changes
from 0% to 100 Hours and starts counting down.
If the remaining lamp time reaches 0 hours, the projector will not turn on regardless of whether the lamp
mode is set to Normal or Eco.
BIOS Version
Firmware Version
Data Version
[Page 2] Source Index
Horizontal Frequency
Vertical Frequency
Sync Polarity
Signal Type
Video Type
Sync Type
Interlace 
						

							
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5. Using On-Screen Menu

 Menu Descriptions & Functions [Default]
Returning to Factory Default [Factory Default]
The Factory Default feature allows you to change adjustments and setting to the factory preset.
[Current Signal]
Resets the adjustments for the current signal to the factory preset levels.
The items that can be reset are: Brightness, Contrast, Color, Hue, Sharpness, Noise Reduction, Aspect Ratio,
Horizontal Position, Vertical Position, Clock, Phase and Picture Management.
[All Data] Reset all the adjustments and settings for all the signals to the factory preset for source except the following:
Language, Security, Communication Speed, Remaining Lamp Time, Lamp Hour Meter, Filter Usage and Projector
Usage. To reset the lamp usage time, see “Clear Lamp Hour Meter” and “Clear Filter Usage”.
Resetting the Filter Usage Hours [Clear Filter Usage]
Resets the filter usage back to zero. Selecting this option displays submenu for a confirmation. Select “Yes” and press
the ENTER button.
Clearing Lamp Hour Meter [Clear Lamp Hour Meter]
Resets the lamp clock back to zero. Selecting this option displays submenu for a confirmation. Select “Yes” and press
the ENTER button.
NOTE: The projector will turn off and go into standby mode after 2100 hours (up to 3100 hours in Eco mo\
de) of service. If this
happens, do the following while in standby condition to clear values for\
 the Lamp Hour Meter:For VT670/VT470 press the HELP button on the remote control for a minimu\
m of 10 seconds.
For VT570/VT47 press and hold the POWER and the EXIT buttons on the remo\
te control simultaneously for a minimum of 10seconds.When the lamp time clock is reset to zero, the LAMP indicator goes out.
Do this only after replacing the lamp. 
						

							
51
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
•T urn 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 
50  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. 
						

							
52
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 f\
ilter,
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.
\f 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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S-VIDEO INCOMPUTER 1 IN
COMPUTER  OUT PC CONTROL
AUDIO AUDIOCOMPUTER 2 IN
VIDEO IN AU
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S-VIDEOCOMPUTER-1 COMPUTER-2
ON/STAND BY
A U TO
A D J. 
						

							
53

 Replacing the Lamp
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. After replacing the lamp, be sure to clear
the lamp hour meter. See page 
50 .
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
f or 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 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:
 Optional lamp and tools needed for replacement:
• Replacement lamp VT75LP (VT670/VT470) or VT70LP (VT570/VT47).
• Phillips screwdriver or equivalent
NOTE: The two lamp houses are slightly different in appearance.
The following explanation uses drawings for the lamp VT75LP.
1. Place the projector on a soft cloth and turn it over to access the lamp cover on the bottom.
6. Maintenance
2. Use a Philips screwdriver to push and release the tab. Push up and remove the lamp cover.
Catch Philips
screwdriver