Question about Symphonic ST420FF 20" TV

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42 in projection television


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Posted on Jan 23, 2008


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Hitachi 50v500 lcd rear projection just trying to get the setup so cable works on ant a can't make the channel move when im on ant a set up.

be aware this model has almost a 100% failure rate on the light engine which while not related to this issue should be kept in mind.

If you have cable get a box with a/v jacks on the back and hook to a rear input on the set--bypass the whole issue and get a better picture.

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FIRST question to be asked is where did you purchase your set? If it was Sams or Cosco. You might be able to take it back under warranty!! And get another tv. Also, did you purchase an extended warranty? Maybe check into that second. If neither of those avenues work, the most likely suspected problem area is the power supply. I hope that helps you narrow it down some or fix your problem.. Good luck. HDTV GURU JAY

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Color has changed to green tint

    According to the system the problem in your projection is convergence and the solution is to replace the IC STK's.The part Number is CZ01341. Change the IC STK both and your TV work fine again.And for parts please see the link below.


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This is a convergence output IC problem. convergence board would have to be removed - remove and replace 2 STK IC's and check the surrounding resistors.Shops usually charge from $200-$300

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You can take the back cardboard cover off to get to the lenses on the picture tubes. Usually, if the picture is dull because it needs cleaning, the mirror should be cleaned. You can remove the top half of the back of the tv and the mirror will be mounted to the inside of it.

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If you don't have a degree on tv repair you should not try to fix it yourself, projection tv's are complicated on the way they are build, and when it comes to realigning the projector you are better of leaving it to the experts, dont try to fix it you might make it worst.

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Hitachi 43FDX20B t.v. has reddish tint

This can be one of two things, I think this set was manufactured in 02 so it would be atleast 6yr.old so saying that could be 1. Fluid contamination problem or 2. Clean Spark gaps problems. The first is when you observe the fluid above the CRT's and see if it looks cloudy and contaminated. 2. The cleaning of the spark gaps are most likely the problem. But this requires knowledge of what to do and what not to do. This is a Dangerous area full of High Voltage. So you would need to know how to discharge set before servicing. Carefully not to damage anode leads to set. For more info on this you can visit

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Hitachi 51inch Projection

Wait until warm and try Magic focus

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