Sony KDL22EX308, KDL32EX308 manual Power Supply, Inverter, Switch Unit, HLR Board

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Chapter 2 - Overall Circuit Description

Power Supply

KDL22EX308

The KDL22EX308 utilizes the GD1 power supply board. There are 3 distinct sections on the power supply:

Standby Supply: Continuously operational as long as AC power is applied, the standby supply generates 3.3VDC for the circuits requiring power while the unit is turned off. An unregulated 15-volt line is present to provide power to the main relay, PFC and main power supply at turn-on.

Main Supply: Once the power supply receives a power-on command from the CPU on the BAL board, the main switching supply is turned on to provide a regulated 12V source, along with a dedicated un-regulated 15V for the audio circuits.

Inverter: The high voltage for the fluorescent backlights is generated by this circuit. Out-of-phase AC voltage of approximately 1000VRMS is applied to the balancer circuit. If the inverter circuit fails to start, for whatever reason, the unit will shut down with a 6-blink error code displayed by the timer LED.

KDL32EX308

Referring to Figure 2-2 the KDL32EX308 utilizes the G2LE power supply board. All of the other circuits are the same as the KDL22EX308 except for the following circuits:

There are 2 distinct sections on the power supply:

Standby Supply: Continuously operational as long as AC power is applied, the standby supply generates 3.3VDC for the circuits requiring power while the unit is turned off. An unregulated 15-volt line is present to provide power to the main relay, PFC and main power supply at turn-on.

Main Supply: Once the power supply receives a power-on command from the CPU on the BAL board, the main switching supply is turned on to provide a regulated 12V source, a dedicated un-regulated 15V for the audio circuits and an unregulated 24V source for the inverter circuit.

Inverter

The inverter receives the unreg24V from the G2LE board and generates the required high voltage AC to power the backlight lamps. As of the writing of this manual, the inverter is not available as a replacement part. The LCD panel assembly must be replaced.

Switch Unit

This board contains the power, channel and volume up/down and menu buttons.

HLR Board

The power, standby and timer LED’s are located on this board along with the IR remote receiver and ambient room light sensor for controlling backlight and RGB levels.

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Contents Training Manual Table of Contents Introduction Overview FeaturesAdvanced Contrast Enhancer ACE USB2.0 Side InputHdmi Bravia SyncBAL Board Overall Circuit DescriptionHLR Board Power SupplySwitch Unit Inverter22EX308 Overall Block Diagram 32EX308 Overall Block Diagram Introduction Software UpdatesExamples of Software Correctable Symptoms Software Update ResponsibilityChecking the Software Version Troubleshooting No Video Video FailuresNo Video Video DistortionTroubleshooting Video Distortion Troubleshooting Flowchart Completely Dead Set Audio TroubleshootingPower Supply Troubleshooting Won’t Power OnNo Power Troubleshooting Flowchart Protection Shutdown Protect Shutdown Troubleshooting Flowchart Diagnostics History Backlight IssuesNo Backlight, No Shutdown Test Points Circuit Board and Connector LocationsKDL22EX308 Test Points KDL32EX308 Test Points KDL22EX308 Board Locations KDL32BX300 Board Locations LCD Panel Basics Tcon Troubleshooting IntroductionAppendix Typical LCD Timing Control Gate Drivers Diagnosing a Failed TconSource Drivers Typical LCD Panel Failures Tcon Failures Troubleshooting a Dead TconLCD 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.