Question about Toshiba 27A44 27" TV

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Toshiba 27AF44 horizontal deflection problem

I have a Toshiba 27AF44 television in which the horizontal size has shrunk by about 2 inches on both the left and right sides of the screen. The TV works fine otherize. There do not seem to be any horizontal sweep (size) adjustments externally like with old TV's or computer monitors. How is this adjustment made (I am not affraid to do the work myself if I know which adjustments to make)?

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This type of thing is not an adjustment.

If you have any type of device that has been working properly and then it shows a change of performance, the last thing to touch is an adjustment. What you have to do is find the source of the problem and change whatever parts that are causing the failure or performance change.

In the case of your TV set, there are some components in the horizontal output stage that have changed in their specifications. This happens over time with use, age, and heat.

An experienced TV service tech can go in to the circuit areas using the proper instrumentation and troubleshoot to determine the failed parts. Then he can change them for you.

It would be best to find a service center that is experienced with, or better who is authorized to service them manufacture type of TV you have. The will have access to the service manuals and the source for the parts.

This type of problem is common caused by failing capacitors, and or the fly-back assembly, and on rare occasions the deflection yoke having some type of failure. I have also seen fault conditions in the main power supply causing this type of fault.

When you give your set out for service, it would be best to ask for an estimate. Depending on the nature of the failure, the cost can be on the expensive side.

Personally, I would be seriously considering to get an LCD HDTV the way things are going now rather than putting in a few hundred dollars to service the TV that you have now.

The average cost for the type of fault you have can run in the area of about $140 to about $280 depending on the type of failures. This is if the parts are still available.


Jerry G.

Posted on Jul 12, 2008

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