NEC Vt670 Projector User Manual

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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 Control functions.
•When the cabinet buttons are unlocked, pressing and holding the EXIT button 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...

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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.
Turning On Noise Reduction [Noise Reduction] (not available for Video and S-Video signals)
Reduces video noise. Select “On” to enable the Noise Reduction feature.
Turning On Flicker Reduction [Flicker Reduction]
Reduces flicker which can occur in an interlaced signal. This feature is not available...

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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...

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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...

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6. Maintenance
Z
O
O
MF
O
CUS
SELECTLAMP
STATUS
POWER
VIDEO
S-VIDEO
COMPUTER-1
COMPUTER-2
ON/STAND BY
AUTO
ADJ.
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...

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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...

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 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 “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 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 47.
CAUTION
•DO NOT...

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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 VT75LP (VT676/VT670/VT470) or...

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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 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 ten seconds to reset the lamp clock back to zero.
When the lamp time clock is reset to...

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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...