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more questions on replacemnts,, nec 1550m..

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    #1

    more questions on replacemnts,, nec 1550m..

    I was considering tying this to one of the erlier psts from today for replacments but i was not sure on polices so im starting a new line,

    ok here it is i need to know if it would be ok to replace the 180uF, 30v. evl caps on the inverter board in a nec 1550m with 220uF 35~40v or would that be pushing the tolerances on the farad/ volt limits,, i dont want to fry something in line and i have more then one bad cap,, the unit works fine but im getting some blue hue to the screen .. and im am sure the caps are not helping. I cant seem to find the 180's locally, I was considering a series solution with a 100 and an 80 if i can find it but not entierly sure on how to wire that, any input would be great, i know i can get away with the voltage differance,, just leary on the the uF ratings and im not super savy at electronics i can identify and replace , but i dont tend to stray from identical ratings.. thank you in advnace for your time.
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    #2
    Re: more questions on replacemnts,, nec 1550m..

    First of all, welcome.

    Second, capacitors in series divides capacitance. To add the 100 to 80 you would need to parallel them. I dont think you should do this even though it is only about a 20% drop in total capacitance.

    If you are not pressed for time, take the time to see if you can buy those caps here from this site. If not, then look elsewhere, digikey, local electronics parts store can order maybe ...etc. You will find what you need without having to compromise. ~spell check maybe. lol

    Take pictures of the board in question and post them as attatchments in your next post. Have fun with it and take your time.
    The strong-minded rise to the challenge of their goals,the weak-minded BECOME HATERS

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      #3
      Re: more questions on replacemnts,, nec 1550m..

      i'd go ahead and put 35V 220uF caps in there.
      maybe even 25V 220uF (if you can measure the actual voltage going through that cap and its lower than 25V)

      increasing the capacitance a bit usually doesn't hurt.. just dont overdo it..

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        #4
        Re: more questions on replacemnts,, nec 1550m..

        Thanks for the greetings and hello.

        ,, and no i can not measure the voltage at least not this time, a micro meter , ohms meter passive read or the likes has been high on my list, but when i see them i always think maybe later,, so for this situation I'm going to the default that "" most " manufactures use the cheapest solution and 30 v is the tolerance, just not real comfortable going with an increase of +- 80uf .
        which is the end result if i go up from the 180uF to 220uF. i have check locally and i am hopeing to get one on order but if the end result is i ""need "" to use a 220 or i think i can get a 200 then i would feel better in the knowledge that the variance would not kill the circuit. I will take your advice and look over the list of sources on this site, also.
        Thank you again

        not a great pic but the labeled caps both have visible failure IE bulged seeping.
        Attached Files

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          #5
          Re: more questions on replacemnts,, nec 1550m..

          nec recapped and running no more blue hue,, all is good and right in the world,,

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