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Miller Boost Circuit Board Assembly NO. 200841

lanuser

Hello everyone,

Let me tell you small story

While back I have purchased dead  "MIller Dynasty 200DX"

After some repairs I have found damage to Boost Board that has internal ground planes  burnedout.

I have realisedthat i would need board replacement, however, board is dicontiniued and replacement board will cost me 2000 dollars if I found one.

After fiew hundret emails  and phone calls to different suppliers without even one ansfer I have desided  recreate board from scrach and make my own.

Fiew month later after reverse engineering pcb to schematic  and later on from schematic to PCB i have finally received new boards.

I have solder necesseryparts and run test on new assembled board, however, I have forgot take a maguments from resistor R86

Could some one be so kind and provide value number between pin 2 & 3 on R86?

Here is some pictures from original board and final my creation:

 

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  • 0

    Hi Alex,

     

    Reverse engineering a board of this size and complexity is a monumental task. Congratulations on what you have accomplished. Sorry I don't have the information you are looking for but your work caught my attentions and I wanted to say I hope you get the reading you need and I hope it all works out.

     

    John

  • 0 in reply to jw0752

    Josh,

    First of thank you for your reply.

    Is to easy to reverse engineering this board, however, it is time consuming a speacially when team of one working on entire project.

    I'm planing some changes for Rev 2.0 of this board, such as an absolite unshielded inductor L1, VR4 LDO that converts +30V to +15V and getting HOT under formal coating without heatsink by manufacturer, adding fuses.

    After reviewing design i came to conclusion! When VR4 fails under heat it damages boost board that cost $2000 dollars and also damages the main board that cost $1600.

    None of these boards has ANY fuses!

    In any case, if i could get Ohm value between pins 2 and 3 on R86 it will really help.

    R86 has 3 pins and it is a verablabe resistor.

    pins 1&2 are shorted together by design and pins 2-3 has Ohm /K Ohm value between 0 to 10K

  • 0 in reply to lanuser

    Hello Alex,

    can you tell me what the component is next to the large 5uf capacitor in your photo, it is labeled US1.

    this would be on the dynasty 200 power interconnect board.

     

    thanks so much.

    Thomas

  • 0 in reply to lanuser

    Hi Alex,

    I had this board.

    Still You need value between pins 2 and 3 on R86?

     

  • 0 in reply to alvideo

    Frankly if someone has the values, and the answer hasn't been publicly posted, then go straight to publicly posting the answer for anyone else that finds this rather than asking if they still need it.

     

    Thanks!

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