Sony KDL32EX308, KDL22EX308 manual Video Distortion, No Video

Page 14

Chapter 3 - Troubleshooting

No Video

Backlights

 

No

TCON

 

 

turned on ?

 

 

 

(LCD Panel)

 

 

 

Yes

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Any OSD

 

Yes

BAL Board

 

 

graphics

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

present ?

 

 

 

 

 

 

 

 

No

 

 

 

 

 

 

 

Unplug LVDS

 

 

 

 

 

 

 

connector at

 

 

 

Any flashes

 

 

TCON while unit

 

 

 

No

TCON

is running . This

 

 

 

seen on

 

 

 

 

(LCD Panel)

may need to be

 

 

 

screen?

 

 

 

 

 

 

done more than

 

 

 

 

 

 

 

once

 

 

 

 

Yes

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BAL Board

 

 

Video Distortion

This is, perhaps, the more difficult failure to diagnose. It is difficult when talking to the customer on the phone because an accurate description of the problem must be obtained in order to determine which part (or parts) to bring to the location. It may also be difficult for the technician when the problem is witnessed.

If the problem is specific to one or more inputs it should be easy to determine if the fault lies on the BAL board or a device that is plugged into it. If the distortion occurs at all inputs it must be analyzed based on what appears on the display and isolated to the BAL board, TCON, or LCD panel. These components usually cause distortions that are unique to the specific circuit. Below is an example of the typical distortions:

BAL Board: Since the video signal is processed on a frame-by-frame basis it is very unlikely that a distortion that is occurring on a specific part of the display panel is originating here. Distortion problems originating in the video process circuits tend to affect the entire picture. Listed below are some examples:

Improper color reproduction or no color

Improper luminance levels

Lack of detail in the picture

Distortions that change with movement in the video

Diagonal lines

No video

FIGURE 3-2

NO VIDEO TROUBLESHOOTING FLOWCHART

CTV-68

11

Image 14
Contents Training Manual Table of Contents Introduction Features OverviewBravia Sync USB2.0 Side InputHdmi Advanced Contrast Enhancer ACEOverall Circuit Description BAL BoardInverter Power SupplySwitch Unit HLR Board22EX308 Overall Block Diagram 32EX308 Overall Block Diagram Software Updates IntroductionChecking the Software Version Software Update ResponsibilityExamples of Software Correctable Symptoms Troubleshooting Video Failures No VideoVideo Distortion No VideoTroubleshooting Video Distortion Troubleshooting Flowchart Won’t Power On Audio TroubleshootingPower Supply Troubleshooting Completely Dead SetNo Power Troubleshooting Flowchart Protection Shutdown Protect Shutdown Troubleshooting Flowchart No Backlight, No Shutdown Backlight IssuesDiagnostics History Circuit Board and Connector Locations Test PointsKDL22EX308 Test Points KDL32EX308 Test Points KDL22EX308 Board Locations KDL32BX300 Board Locations Tcon Troubleshooting Introduction LCD Panel BasicsAppendix Typical LCD Timing Control Source Drivers Diagnosing a Failed TconGate Drivers Typical LCD Panel Failures Troubleshooting a Dead Tcon Tcon FailuresLCD Timing Control Failures Examples of Actual Tcon Failures Appendix LCD Panel Failures Appendix San Diego, CA

KDL22EX308, KDL32EX308 specifications

The Sony KDL22EX308 and KDL32EX308 televisions are part of Sony's Ex Series, renowned for delivering high-quality viewing experiences in compact screen sizes. Designed primarily for smaller spaces, such as bedrooms, kitchens, or dormitories, these models effectively boast an array of features that enhance their usability and performance.

One of the standout characteristics of both models is their LED backlighting technology, which ensures bright images and remarkable color accuracy. This technology also contributes to energy efficiency, making them eco-friendly choices for consumers. The KDL22EX308 comes with a 22-inch display, while the KDL32EX308 offers a larger 32-inch screen, appealing to users who need a bit more screen real estate without major compromises on space.

Both models support a 720p HD resolution, which provides crisp and clear images perfect for everyday viewing. They incorporate Sony’s Motionflow XR technology, which minimizes motion blur during fast-paced scenes, making them ideal for watching sports, action films, or playing video games. This feature enhances the overall viewing experience by ensuring that moving images remain smooth and fluid.

Connectivity also plays a significant role in the usability of the KDL22EX308 and KDL32EX308 televisions. They come equipped with multiple HDMI inputs that allow users to connect various devices such as gaming consoles, Blu-ray players, and streaming boxes with ease. Additionally, a USB port permits users to view photos and videos directly from a USB stick, adding to their versatility.

Furthermore, both models incorporate a built-in digital tuner, enabling access to free over-the-air HD broadcasts. This feature allows viewers to enjoy a variety of channels without the need for a cable subscription, making it a cost-effective entertainment solution.

Another significant aspect of these models is Sony's Clear Resolution Enhancer technology, which enhances image clarity by upscaling lower resolution content, thus delivering a more enjoyable viewing experience across various media.

In conclusion, the Sony KDL22EX308 and KDL32EX308 televisions combine advanced technologies and features within compact designs, making them excellent choices for anyone seeking high-quality visual performance in smaller spaces. Their efficient connectivity options, superior image quality, and energy-saving capabilities position them as modern and practical entertainment solutions.