NEC Vt676 Projector User Manual
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54 7. Appendix Common Problems & Solutions (See also Power/Status/Lamp Indicator on page 53.) 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...
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55 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...
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56 7. Appendix Specifications This section provides technical information about the VT676/VT670/VT575/VT470/VT47 Projectors performance. Model Number VT676/VT670/VT575/VT470/VT47 Optical LCD Panel 0.7 p-Si TFT active-matrix (with Micro Lens Array on VT676, VT670 and VT575 only) ResolutionVT676/VT670/VT575: 1024 768 pixels* native, up to UXGA with Ad- vanced AccuBlend VT470: 800 600 pixels* native, up to UXGA with Advanced AccuBlend VT47: 800 600 pixels* native, up to SXGA with Advanced AccuBlend...
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57 7. Appendix Sync Compatibility Separate Sync / Composite Sync / Sync on G Built-in Speaker 1W (monaural) Power Requirement 100 - 240V AC, 50 / 60 Hz Input CurrentVT676/VT670/VT470: 2.7 - 1.4A VT575/VT47: 2.1 - 1.2A Power ConsumptionVT676/VT670/VT470: 8W in Standby mode / 250W in Lamp Normal mode / 200W in Lamp Eco mode VT575/VT47: 8W in Standby mode / 190W in Lamp Normal mode / 155W in Lamp Eco mode Mechanical Installation Orientation Desktop/Front, Desktop/Rear, Ceiling/Front, Ceiling/Rear Dimensions...
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58 7. Appendix Cabinet Dimensions LAMP STATUS POWER VIDEO AUTO ADJ. S-VIDEO COMPUTER-1 COMPUTER-2 ON/STAND BY ZOOMFOCUS SELECT AC IN AUDIO OUT AUDIO S-VIDEO INCOMPUTER 2 IN VIDEO INCOMPUTER 1 IN MONITOR OUTPC CONTROLL/MONOR AUDIOL/MONOR AUDIO 112.5 (4.4) 260 (10.2) 20.3 (0.8) 64.6 (2.5) 294 (11.6) 71.5 (2.8) Lens center Lens center Unit: mm (inch) VT676/VT670/VT575/VT470
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59 LAMP STATUS POWER VIDEO S-VIDEO COMPUTER ON/STAND BY ZOOMFOCUS SELECT AC IN 112.5 (4.4) 260 (10.2) 20.3 (0.8) 64.6 (2.5) 294 (11.6) 71.5 (2.8) ZOOM AUDIO S-VIDEO INVIDEO INCOMPUTER IN MONITOR OUTPC CONTROLL/MONOR AUTO ADJ. AUDIO Lens center Lens center Unit: mm (inch) VT47 7. Appendix
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60 Mini D-Sub 15 Pin Connector Pin Assignments of D-Sub COMPUTER Input Connector Signal Level Video signal : 0.7Vp-p (Analog) Sync signal : TTL level 51423 10 11 12 13 14 156 978 7. Appendix * Only COMPUTER 1 input connector supported on VT676/VT670/VT575/VT470. Pin No. RGB Signal (Analog) YCbCr Signal 1Red Cr 2Green or Sync on Green Y 3Blue Cb 4Ground 5Ground 6Red Ground Cr Ground 7Green Ground Y Ground 8Blue Ground Cb Ground 9No Connection 10 Sync Signal Ground 11 SCART Sync 12 Bi-directional DATA...
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61 7. Appendix Compatible Input Signal List Signal Resolution Frequency H. Refresh Rate ( Dots ) ( kHz ) ( Hz ) NTSC – 15.734 60PAL–15.625 50PAL60 – 15.734 60SECAM – 15.625 50VESA 640480 31.47 59.94IBM 640480 31.47 60MAC 640480 31.47 60MAC 640480 34.97 66.67MAC 640480 35 66.67VESA 640480 37.86 72.81VESA 640480 37.5 75IBM 640480 39.375 75VESA 640480 43.269 85.01IBM 720350 31.469 70.09VESA 720400 37.927 85.04IBM 720350 39.44 87.85IBM 720400 39.44 87.85VESA 800600 35.16 56.25VESA 800600...
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62 7. Appendix PC Control Codes and Cable Connection PC Control Codes (VT676/VT670/VT575/VT470) Function Code Data POWER ON 02H 00H 00H 00H 00H 02H POWER OFF 02H 01H 00H 00H 00H 03H INPUT SELECT COMPUTER 1 02H 03H 00H 00H 02H 01H 01H 09H INPUT SELECT COMPUTER 2 02H 03H 00H 00H 02H 01H 02H 0AH INPUT SELECT VIDEO 02H 03H 00H 00H 02H 01H 06H 0EH INPUT SELECT S-VIDEO 02H 03H 00H 00H 02H 01H 0BH 13H PICTURE MUTE ON 02H 10H 00H 00H 00H 12H PICTURE MUTE OFF 02H 11H 00H 00H 00H 13H SOUND MUTE ON 02H 12H 00H...
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63 7. Appendix 1 2 54 36 7 8 To RxD of PC PC Control Connector (DIN-8P) To TxD of PC To GND of PC NOTE: Pins 2, 3, 5, 6 and 8 are used inside the projector.