Question about Symphonic ST420FF 20" TV

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42 in projection television

WE HAVE A 6YR OLD HITACHI PROJECTION 42IN. ALL OF THE SUDDEN OUR COLR KEPT GOING OFF AND WHEN WE CHANGED THE CONVERGION WE COULD NOT SET IT UP.

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Http://home.earthlink.net/~oleg.filippov/ConvergenceFix.htm
http://cmpalmer.blogspot.com/2006/11/fixing-my-own-tv-part-ii.html

Posted on Jan 23, 2008

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Posted on Jan 02, 2017

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1 Answer

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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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Could you tell me why the picture keeps going off but the sound stays on but when i switch the tv off then back on via the mains or the remote, the picture comes back on for a few minutes before going off...


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


Hi,
    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.

http://jr.partsearch.com/Model/Hitachi+Ltd/Hitachi/43FDX01B.aspx?SearchTerm=True

   Thanks.

Jan 09, 2010 | Hitachi 43FDX01B TV

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43fdx15b Hitachi 42in red vertical lines magic focus inop for red


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

Sep 26, 2009 | Hitachi Televison & Video

1 Answer

I have a Hitachi HDTV Model No. 51G500A


Replaced convergence ics. This set is old and if colors especially red are flagging crts are going bad . I would not repair a set this old .

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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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buy this lamp p/n UX21513 but first take out the old check it should be blown by what you say..

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1 Answer

Colr red keeps coming in and out. had tv for 5 years and hasnt been serviced


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.

Feb 10, 2008 | Televison & Video

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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 ctechnicians.com

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1 Answer

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Wait until warm and try Magic focus

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