Question about Hitachi 57F500 57" Rear Projection HDTV-Ready Television

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Magic Focus on Hitachi HDTV Ultravision

When we go to turn off our T.V., the magic focus comes on and the T.V. won't turn off. Then, after the magic focus is through, it goes back to the channel we were watching, except with no sound. If we push the remote "on" button again, we get the same channel with sound. If we go to turn it off, we start all over again with the magic focus coming on. The blue light won't go off and we hear no click. We've changed the batteries in the remote and it still won't work. Can you help me?

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  • Anonymous Sep 10, 2008

    I'm having the same problem, but with the 46" version of the TV. It just started tonight.

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6 Suggested Answers

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  • 2 Answers

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Posted on Jan 02, 2017

  • 1694 Answers

SOURCE: Magic Focus does not work.

Convergence issues usually resolved by changing convergence output amplifier IC's.....Original STK392-110 should be replaced
with upgrade Stk394-160E Hitachi part # CZ 01341,change both
for reliability.....check B+ feed resistors for over-heating....T.

Posted on Feb 04, 2008

yankeegurl
  • 121 Answers

SOURCE: PROJECTION TV HITACHI ULTRAVISION COLOR CONVERGENCE PROBLEM

it sounds like your blue convergence ic is getting weak you need to replace the ic's STK392-110 and you should replace both because when 1 is bad the other will go real soon. They are inexspensive at the sight I posted and you will also get free tech online support if you purchase them there.
http://servicemanuals.vstore.ca/

Posted on Apr 13, 2008

Slinteriors
  • 8617 Answers

SOURCE: Magic Focus does not fix the blue 57UWX20B Hitachi

you need to replace the convergence ICs they are STK392-110 you can get replacements at the following link and they send instalation instructions with pictures so you can do the repair yourself. You need to replace both IC they are both STK392-110 they are located on the large heat sink on the far right side of your Tvs' chassis Heres the link for replacement ICs
http://servicemanuals.vstore.ca/

Posted on May 20, 2008

experttv
  • 203 Answers

SOURCE: hitachi tv magic focus does not work

Your problem is the convergence circuit. This is very common in CRT projection sets like yours. There are a couple of IC's that need to be changed and possibly some resistors. A good repair shop will run you $400-$500 to do the repair.

Posted on Oct 28, 2008

chipbug
  • 1 Answer

SOURCE: magic focus 4 error

Error 4 is listed as an overflow in the convergence section.
To fix:
1. Check the placement of the sensor
2. perform an Adjustment check of th H/V size & centering
3. Conv. amp. gain check, check these resistors:
R041, part # 0790024R, RES.CHIP 1/16W 100 OHM
R046, part # AQ00164R, RES.CHIP 1/16W 75 OHM TAPE
R050, part # 0790059R, RES.CHIP 1/16W 47K OHM
R058, part # 0790054R, RES.CHIP 1/16W 18K OHM
R062, part # 0790047R, RES.CHIP 1/16W 5.6K OHM

Posted on May 15, 2010

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