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Auto focus problem SAMSUNG SP-48T5HP

Can any one tell me why the auto focus mode won't clock through to 100%on a Samsung SP-48T5HP?

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Re: auto focus problem SAMSUNG SP-48T5HP

It needs to most likely be re-initilized in a technician service menu. If the convergence looks fine otherwise this is most likely the cause.

Posted on Mar 02, 2007

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Green Out Of Focus

Your TV most likely a convergence failure. ( common problem )

Here are some of the most common symptoms and example photos of a convergence problem

  • Screen looks 3D
  • Colors don't line up
  • One or more colors can't be adjusted when using the convergence menu.
  • Screen is bowed or warped.
Here are some photos of convergence problems.

Here is a quick test....

Using your original remote go-to the tv settings then goto the convergence section.

Try to adjust the red and then the blue convergence.

You should be able to move them up, down, left, and right.

If you can't move them in all directions your convergence chips are bad and should be replaced. This is a common problem.


You will need to replace the convergence chips and possibly some convergence resistors and pico fuses. Its a fairly easy DIY job or you can call in a pro. If you want to do the repair yourself check the site Their kits include a photo instruction guide, original OEM Sanyo STK chips, convergence resistors, pico fuses, thermal paste, email/phone support, etc.

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The picture went fuzzy (color alignment).


try going to the antenna input from the menu screen, then trying to do the auto focus, or manual focus. My Samsung won't let me do the auto focus unless I'm looking at the antenna for some strang reason.

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The auto focus is not actually focusing the tv. When it is running it is adjusting the convergence. Most likely the repairman that replaced your tuner didn't plug the sensor wires back in. I would call him back out and have him hook it back up.

There should be a convergence menu in the tv. Use the samsung remote and go into the menu and look for convergence.

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you will need a service tech to alien the convergence in the service mode then perform the perfect focus in the service mode to lock this setting in memory.

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On the remote you have a door. Open it and you'll find the button focus on the right side the second from up to down. If not is in the menu, go in setup, convergence, auto, ok.

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Replace convergence amp IC's = tech skill required.
Then activate auto focus...............T.

Let me know if you want step-by-step help....................

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Perfect "FOCUS" is a misnomer.Convergence is the real issue.Enter servicer mode--perform accurate convergence alignment procedure--activate perfect focus as last step to 100% alignment.If you have a High-Definition source,check procedure for that.

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