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    Polaris 1200DI Ficht EMM problem, Burned out C27 & C28, Q6 - please help

    polaris 1200di emm problem. please help.

    I am a 2002 polaris 1200di user in Turkey and today I figured out that some of the emm elements are blown.

    Can someone help me about the values of the broken parts. please see photos.

    thank you
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    Last edited by K447; 10-07-2013 at 10:06 PM.


  2. #2
    Click avatar for tech links/info, donation request K447's Avatar
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    There is a company in the USA that repairs the Polaris Ficht EMM.

  3. #3
    yes i know them. DFI but it will be so much time for me to ship the item. i am a laptop motherboard repairman so i can easily change them. all i need is the numbers written on those condansators.

  4. #4
    i cant read the sizes of the condansators as they are burn. there are hundreds of sizes for them.

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    Click avatar for tech links/info, donation request K447's Avatar
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    Arrow C27 C28 Tantalum capacitor replacements, Ficht EMM power rectifier section

    Quote Originally Posted by turtle_soup View Post
    polaris 1200di emm problem. please help.

    I am a 2002 polaris 1200di user in turkey and today i figured out that some of the emm elements are blown. can someone help me about the values of the broken parts. please see photos. thank you
    See this thread for more info.

    It looks like the failed Q6 is 16TTS08S SCR.

    I think the two yellow capacitors (C27 and C28 ) are 10uf 35 volt Tantalum capacitors, made by AVX.

    Markings are 106 V and N0432

    Triangle symbol with curved bottom edge is AVX (I think)
    106 = 10,000,000pf = 10uf
    V=35 volt rating
    AVX voltage code chart for TAJ Tantalum capacitors
    D = 20
    E = 25
    V = 35 volt rating
    T = 50
    J = 63
    P = 75
    A = 100
    B = 125
    N0432
    N = 2001
    04 = week 4 (capacitor manufacturing date)
    32 = AVX internal batch code


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    The banded end is positive (anode).

    If my understanding is correct, these two OEM capacitors are actually somewhat voltage stressed in normal EMM operation. Typically Tantalum capacitors are operated at 50% of the rated voltage. Since they are in series, that would amount to 35 volts nominal operating voltage for the series pair. But these are connected directly across the 45 volt DC output of the EMM. I would suggest higher 50 volt rated (code T) Tantalum capacitors in that location.

    There is no parallel resistor network to ensure those series capacitors equally share the voltage stress. A pair of series resistors in parallel with the capacitors and also joined to the capacitor midpoint might help ensure longer capacitor life.

    When Tantalum capacitors fail they usually become a short circuit. When one of these two failed and shorted, the other capacitor was instantly exposed to the full 45 volts DC, which is well beyond the 35 volt rating and therefore caused it to also fail. With both capacitors now shorted the fault current would be huge until it burned out the circuit board track. This appears to have occurred in your EMM.

    I think any of these capacitors would work as replacements.

    The TAJD106K050RNJ seems reasonable, costs under $4 from Digi-Key part number 478-2380-1-ND
    10uf 50 volt rating
    Last edited by K447; 01-31-2015 at 05:43 PM.

  8. +1 by:


  9. #8
    thank you again for the help i will discuss this with my friend who is better than me in electronics.

  10. #9
    my q6 is ok by the way the broken part also is the c23.

  11. #10
    im sure those are burnt because of the missing c23. i think the previous owner of this ski removed c23 for some reason.

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