42" Class LCD HDTV

MODEL NUMBER: SV421XVT Model Features:
  • •  42.02 inch diagonal
  • •  1080P Full HD
  • •  240Hz SPS*
  • •  Smooth Motion Technology
  • •  50,000:1 Dynamic Contrast Ratio


  • Overview
  • Tech Specs
  • Customer Ratings
  • More Photos
  • Support

Product Overview

Extreme VIZIO Technology!
Breaking the mold of traditional HDTVs, the VIZIO SV421XVT 42" Class (42.02 inch diagonal) brings you the latest, cutting edge HDTV technologies. From 1080p full high definition resolution, to 240Hz SPS*, 50,000:1 contrast ratio and advanced sound technologies. The XVT series epitomizes what HDTV should be!

XVT Series

Extreme VIZIO Technology! The XVT Extreme VIZIO Technology series epitomizes cutting edge technology delivering an experience that’s simply out of this world.  Learn More

240Hz SPS*

240Hz SPS* delivers 240 scenes per second producing enhanced frame rate and delivering sharper clarity of fast action scenes for blur free images.  Learn More

1080P Full HD

Full 1080P High Definition resolution gives you over 2 million pixels, making the clarity and detail of your picture razor sharp.  Learn More


ECO HD™ exceeds current Energy Star® guidelines by at least 15% below Energy Star 3.0, saving you money on your utility bills while limiting the impact on our planet.

Additional Features Include:

• 50,000:1 Dynamic Contrast Ratio for darker blacks and brighter whites

• SRS TruVolume eliminates volume inconsistencies between programming

• SRS TruSurround HD delivers immersive virtual high definition surround sound

*240Hz displays 240 scenes per second by combining advanced 120Hz technology with scanning backlight

Tech Specs

Class: 42"
Viewable: 42.02"
Native Panel Resolution: 1920x1080 pixels
Signal Compatibility: Supports 480i (SDTV), 480P (EDTV), 720P (HDTV), 1080i (HDTV), 1080P (HDTV)
Colors: 1.06 Billion
Computer Support: 640 x 480, 800 x 600, 1024 x 768, 1360 x 768, 1920 x 1080
Dynamic Contrast Ratio: 50,000:1 (Mega DCR)
Brightness: 500 cd/m2 (typical)
Response Time: 4ms
Viewable Angle: 178° (horizontal and vertical)
Pixel/Dot Pitch: 0.4845mm (H) x 0.4845mm (V)
SRS TruSurround HD™: Yes
SRS TruVolume™: Yes
SRS TruSurround XT™: No


HDMI with HDCP 3
RF Connector for Internal Tuner 1
Component YPbPr plus Stereo Audio: 1
S-Video: 1
Computer RGB: 1
Composite Video:  
USB Ports:  
Service Ports:  


HDMI with HDCP 1
RF Connector for Internal Tuner  
Component YPbPr plus Stereo Audio: 1
Composite Video: 1
Computer RGB:  
USB Ports:  1(Multimedia and Service)
Music (MP3):  
Video (MPG):  
Photo (JPEG):  
Service Ports:  


SPDIF Digital Optical: 1
Stereo Audio: 1


Refresh Rate: 240Hz
Smooth Motion: Yes
Picture-in-Picture (PIP): Yes
Picture-outside-Picture (POP): Yes
Zero Bright Pixel Defect Guarantee: Yes
V-Chip: Yes
3D Comb Filter: Yes
3:2 or 2:2 Reverse Pull-down: Yes
ATSC with 8VSB & QAM demodulation: Yes
ATSC with MPEG-2 decoding: Yes
NTSC Video decoding via Video: Yes
Progressive Scan Video: Yes
Color Temperature: 6500K, 5400K and 9300K
Color Fine Tuning: Independent Red, Green and Blue
Speakers: Built-in 15W x 2 Speakers
Panel Lamp Life (typical): 50,000 hours
Voltage Range: 100 to 240Vac at 50/60 Hz
Power Consumption: 145W average, 1.0W standby
Universal Remote: VIZIO Remote Control


Gross: 51.5 lbs
Net With Stand: 38.1 lbs
Without Stand: 35.7 lbs


With Stand: 39.406" W x 27.122" H x 9.504" D
Without Stand: 39.406" W x 25.626" H x 3.795" D
Packaging Dimensions:  




COMPLIANCES Energy Star 3.0 ATSC Spec A/65, EIA/CEA-766-A


Hole Pattern: 600 x 200
Screw Size: M6
Screw Length: 20mm
Screw Pitch: 1.0mm


VIZIO WARRANTY One year parts & labor. Free lifetime technical support. Free On-Site Repair on VIZIO Televisions 30" and above.

Customer Reviews

Outstanding picture; audio is fantastic; perfect size Review by Dottie

I purchased this Vizio because of the outstanding color and the sharp, crisp picture quality. I could not believe that I could actually SEE a difference between my [new] 32" Sony and this Vizio, but I could. The audio 'ain't bad' either. It was a snap to set up. I am so delighted. I highly recommend this set. For the price, you can't beat it.

(Posted on 9/3/09)

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Product Photos


  • SV421XVT - Angle View
  • SV421XVT - Side Panel
  • SV421XVT - Angle View
  • SV421XVT - Side Panel

Support Information

Product Downloads

User Manual: SV421XVT HDTV User Manual PDF
Quick Start Guide: SV421XVT HDTV QSG PDF
Overview Sheet: SV420XVT HDTV Overview Sheet PDF

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Warranty Details

Click here for the warranty details of your SV421XVT.

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