Audio Troubleshooting, Completely Dead Set

Chapter 3 - Troubleshooting

Audio Troubleshooting

Since all audio signals are input, processed and ampliﬁed by the BAL board, any issue involving the loss of audio or audio distortions which is present at all inputs would dictate that issue is remedied by replacement of the BAL board. It is possible that a software update might be required but it is very unusual for this to affect all sources. Once again, check with the Sony technical support website regarding this issue.

Audio problems that are input speciﬁc (especially the HDMI and digital sources such as the USB input and tuner) are more likely to point to the need for a software update and this is especially true if the problem is intermittent.

Power Supply Troubleshooting

Failures in the power supply circuits that prevent the unit from turning on are caused by one of the following scenarios:

•Complete failure of the standby and main power supplies

•Failure of the main supply including the main switching regulator, PFC circuit, main relay and other components required to turn the circuits on.

•The power supply is not receiving a turn-on command from the

CPU

Completely Dead Set

A complete power supply failure is generally the result of severe transients in the AC line such as those incurred during an electrical storm. The EX308 model line utilizes a red standby LED located on the lower left front bezel that is lit whenever the unit is receiving AC power and is turned off. The KDL32EX308 model incorporates an “eco” switch located on the lower right side which removes all AC power from the unit and produces the same symptom of a unit that has been unplugged or lost its AC power. This switch should be checked ﬁrst whenever the standby LED is not lighting. This switch is not available on the KDL22EX308.

Won’t Power On

This situation assumes that the red standby LED is lit when AC power is applied to the unit. A lit standby LED indicates that the standby power supply is operational, and the CPU on the BAL board is at least partly operational. In this case it is likely that the main power supply is either not being turned on or it has failed.

Service Tip: If the standby LED is lit but the unit will not power on, remove AC power from the unit. This can be done by unplugging the AC cord or turning off the “eco” switch. Wait about 20 seconds and re-apply AC power. You should hear a distinct click of the main relay which will engage for about 5 minutes, 20 seconds before releasing again. If the relay clicks on, the power-on command line from the CPU is functional. Use the power- on button on the right side of the unit to attempt a turn-on and eliminate a defective remote control system. The troubleshooting ﬂowchart in Figure 3-4 will assist in isolating the power problem.

ECO

SWTCH

CTV-68

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.