User Guide for JVC LT-42XM48: 

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Chapter Summary: JVC's Dynamic Gamma Circuitry (DGC) makes it easier to see dark areas when a picture has many dark areas, and makes it easier to see the bright areas when a picture has many bright areas...DGC is turned on, DGC analyzes and adjusts the total level... Dynamic Gamma... of picture brightness balance, especially in dark areas where the... level of grayscale is often lost, turning completely to black DGC...

User Guide for JVC LT-37X688 / LT-37XM48 / LT-42X688 / LT-42X788 / LT-42XM48 / LT-47X788 Users also looked at: Page 40 - Quick Start-up Standby power consumption is higher when you have this feature turned on...... To "Initial Setup" To enter To "Quick Start-up" To turn "On" or "Off... Quick Start-up allows you to lessen the time for the TV to turn on and ready for viewing...... Page 45 - Video-1 Audio If your DVI or HDMI component is capable of digital audio and video, choose "Digital...Refer to your DVI or HDMI component’s instruction manual for more information...When you select "Auto", the television will select "Analog" or "Digital" automatically, depending on the audio input from the HDMI...... Page 48 - Smart Picture Smart... Page 60 - Sound Press the SOUND button... A.H.S...Smart... A.H.S...Music gives basic effect and movie for more effect...... To select "A.H.S." or "Smart Sound" To choose the setting... By pressing the SOUND button, you can change the A.H.S...Advanced Hyper Surround) and Smart Sound on or off......