Question about Hitachi 43FDX15B 43" Rear Projection Television

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1.5 ohm resistor rk 46 keeps blowing

I have the red shift convergence problem. I replaced the 392-120 with 392-150 and all the resistors. it worked but did not solve the shift issue. I noticed that the rk46 resistor was burnt so I replaced it and put in stk394 160 ic which is supposed to be a direct replacement for the 120,150 chips. I powered it up and it fried the rk46 1.5 ohm resistor almost immediately. Put another resistor and it did the same thing. I noticed that the resistor is in series with two diodes which seem to check out ok. I noticed that the resistor connect to a plug labeled red pcb which appears to be the red cathode ray gun. turned the set on without the divergence board connect and all the guns seem to emit a snow ball pattern in their respective colors I shut it off immediately to avoid damaging it. Do I need to buy two more chips or is there another problem?

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  • bmcdoodle Mar 15, 2009

    Guru, If you read the other posts regarding convergence ics you would see that it is a common and successful procedure to swap the 120 120 with 150s of the same prefix and is also recommended by Hitachi. I am looking for solutions from people who have specific experience with this problem. Thanks for trying

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  • Hitachi Master
  • 3,459 Answers

You should have put the original OEM STK's in the set - if your set had 110's or 120s put those chips only. Do not risk different chips with different specs/amps/ etc....when you do resistors blow as you have discovered.

Posted on Mar 15, 2009

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