Roland LVS-800 用户手册

• Is an AC adapter other than the included one being connected? Use the included AC adapter (Roland PSB-7U).

• If the PGM OUTPUT FADE button illuminated? No video is output while the output fade button is lighted.

• Are the selections for the input channels correct? When selecting the input for A Bus or B Bus, selecting a channel that has no input signal 

results in no picture being output.
“Switching Between A Bus and B Bus” (p. 16)

• Is any signal being output from the connected camera or playback device? Check the source monitor connected to a MONITOR OUT 

connector.

• Is the selection of NTSC or PAL correct?

• The signal from the camera or other source device may be below the threshold value. Go to the “Utility” menu and try adjusting the “Video 

Sync Threshold” setting.

• A weak incoming video signal can cause PGM output to be black-and-white or distorted. Make sure your video source devices and cabling 

are providing adequate video signal.

• Is a moving image being input from a computer? Flicker or skew may occur in moving images input from a computer. This is called tearing, 

and does not indicate an equipment malfunction.

• Was the input channel for one bus changed while the video fader was at a position short of fully moved to the opposite end? When you’re 

switching the input channel for the bus other than the one displayed, first move the video fader all the way to the end of its stroke.
“Switching Between A Bus and B Bus” (p. 16)

• Is the same input channel selected for A Bus and B Bus? If the same input channel has been selected, operating the video fader does not 

change the output picture.
“Switching Between A Bus and B Bus” (p. 16)

• Is the operation mode set to the PGM-PST mode? In this mode, only button operations can be used to change the picture. Operating the video 

fader has no effect.
“Use in Other Operation Modes Besides the A/B Mode” (p. 19)

• The video fader might not be calibrated correctly. To perform calibration, go to the “Utility” menu and execute “Video Fader Calibrate” (A 

and B). Move the control all the way to the A Bus end and execute “Video Fader Calibrate A,” then move it all the way to the B Bus end and 
execute “Video Fader Calibrate B.”

• Is the video output from the computer in a format that the LVS-800 does not support? Change the settings on the computer to enable output 

in a supported format.
“Connecting Computers” (p. 11)

• Is the input from the computer selected as the FOREGROUND picture? No key composition is applied to the BACKGROUND picture.
• Is KEY LEVEL for DSK set at MAX? Turning the dial all the way to MAX makes the picture set as FOREGROUND disappear from view.

• Has the color to use for key composition been set correctly? By default, black is used for composition. Inputting a background image of a 

color other than black results in incorrect compositing with the background picture. Go to the “DSK Setup” menu and use “DSK Key Mode” 
to change the color to use for key composition.
“Trying Out DSK Composition” (p. 27)