10-01-2007 WS - Laserfiche WebLink

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Mounds View Cable Channel 16 Issue: Projector has a green color cast. Last updated: 9/26/2007, VVA 8/13/07 Councilmember Stigney mentioned that video displayed on the projector had a greenish color. 8/29/07 Tested the projector with laptop before the Comprehensive Plan meeting. Mark Beer pointed out two flashing lights and suggested we power down because they indicated an error mode. 8/30/07 Called Chuck Pearce at DS Productions about the projector error codes. The projector displayed a warning about cleaning the air filter, then the red LAMP and TEMP indicator lights blinked. Mr. Pearce said that the lamp had been recently replaced in the projector and the air filter cleaned, so the warnings were in error. He tried to guide the Cable Television Coordinator through the commands needed to reset the warning, but the menus behaved oddly. The reset command would not clear the error message and caused the display to mirror. 8/31/07 Chuck Pearce came to City Hall and verified the improper operation of menu operations and the erroneous lamp warning. • Mr. Pearce said that the lamp was fine and the air filter was clean, although since the projector was still under warranty and the menus were not responding correctly, it should be sent in for service. He would not remove it until he could bring a loaner projector to use during the service period. • We troubleshot the projector for a color shift by connecting other signal sources. If the projector itself or the lamp were the source of the problem, the color shift should appear on any source. o A laptop connected to the RGB1 input looked acceptable, although we did not have color bars or a standard test signal. The red, green, blue and yellow patches present in the Windows Start menu icon demonstrated that all colors appeared. o We connected the City’s camcorder directly to the projector’s video input to look at another video source. The color from the camcorder appeared more natural than that of the ceiling-mounted cameras through the video switcher, but there was still a greenish tinge. • The Cable Television Coordinator white balanced the three ceiling-mounted cameras. • Mr. Pearce demonstrated the video controls of the projector, and we adjusted the contrast, brightness, color saturation, and hue for good performance. • Mr. Pearce suggested that the lighting in the room is probably a contributing factor. The color output of florescent lights has a large green component, and they are not usually specified as the lighting instruments for television productions. He pointed out that it is possible to buy or rent tungsten lighting instruments that could be installed in place of the florescent ones.