Vuplus Duo motherboard parts side cleaned.

Discussion in 'VuPlus Duo Schematic drawings, Pcb images etc..' started by Johnny B., Jun 13, 2015.

  1. Johnny B.

    Johnny B. Technical Support Staff Member Moderator

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    Not my favorite job, but since I need to know the actual print lines, I must remove all the parts from the motherboard.
    But obviously I don't do that with a motherboard that is still suitable for repair.
    This one was killed by lightning, and so a suitable motherboard for this purpose.

    But it delivered also a nice picture on, one that can be used to see the print tracks, and connections.
    And yes, it's big.

    Scanned at 1200 dpi, 24 bit, and a height/width 10560/8564 pixels.
    Have fun with it, see the zip file below with the jpg image in it, it's 23MB.

    VuPlus-Duo-pcb-partsside-cleaned.zip

    VuPlus-Duo-pcb-partsside-cleaned.-sample.jpg
     
    Last edited: Jun 13, 2015
  2. bibic

    bibic Active Member

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    Hello,
    Can you help me? On original motherboard exista a condensator C665 (near euroscart - 220 mF/50V). Where come + (positive) leg to motherboard? My motherboard has exfoliated when I tryed to change this capacitor.
    Thanks
     
  3. Johnny B.

    Johnny B. Technical Support Staff Member Moderator

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    Hi,
    This C665 is a smd ceramic cap without a positive/negative position.
    And so it doesn't matter how you place it on the motherboard.
    vuduo-c665-snap.jpg
     
  4. bibic

    bibic Active Member

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    I have original vu duo. On my board C665 is big capacitor - 220 mF/50V.
    Thanks for your answer.
     
  5. Johnny B.

    Johnny B. Technical Support Staff Member Moderator

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    In that case, I can check this only tomorrow evening.
    Because than I'm at a place where I have an original vu+ duo board.

    In any case the motherboard cap symbol shows the plus/min side.
    The white side is always the min side which you also can see on the picture above.
    And, of course, it is also measurable, the minus side is mostly connected to the ground, (as the screw holes).
    The plus side (where it goes) I can measure tomorrow.
     
  6. bibic

    bibic Active Member

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    I know. But positive leg on capacitor is exfoliate and can not put on motherboard. I need another point to stick positive leg of capacitor.
    Thanks.
     
  7. Johnny B.

    Johnny B. Technical Support Staff Member Moderator

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    Okay, that's clear now.
    Tomorrow evening I'll be able to give you the information.
     
  8. bibic

    bibic Active Member

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  9. Johnny B.

    Johnny B. Technical Support Staff Member Moderator

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    Okay, about the c665 positive side,
    The C665 + side just goes to the F606/C664 and the AK4707EQ pin 34, Vp pin.
    The F606 is feed from the 12vdc psu pin.
    Just as this image shows,
    vuduo-org-c665.jpg

    So you can just add the C665 + pin to the F606, just as this image shows.
    Also check the F606 inductor, check if it's not interrupted.
    vuduo-org-c665-f606.jpg
     
  10. bibic

    bibic Active Member

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    Thanks. I'll check again because I did the same, but receiver start and stop forever. Something is wrong.
    I had the some problem with C264 (near network) and there was easy, but I'm thinking is not ok.
    Positive leg of C264 where come?
     

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  11. Johnny B.

    Johnny B. Technical Support Staff Member Moderator

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    This is from the Usb circuit, see the drawing...

    Vuduo-C264-Usb-5v-circuit.jpg
     
  12. Johnny B.

    Johnny B. Technical Support Staff Member Moderator

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    Btway, if your box is stuck on starting (and so you see Starting on the display) it could be the famous cap C807.
    Also, to see where it gets stuck, you can use the rs232 serial port with a terminal program as putty to see where it ends.
     
  13. bibic

    bibic Active Member

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  14. bibic

    bibic Active Member

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    I'll looking monday on pcb. Thanks for help.
     
  15. Johnny B.

    Johnny B. Technical Support Staff Member Moderator

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    I wonder why you thought on the other forum that it may be a clone box, because as far as I known has clone boxes security chips, the original not.
    And yes, clone vuduo software just works on a original box, but at the other hand clone software could mess up the original box with the risk that the original software won't work anymore.
    However the best way to test a original box is to flash it with the latest openpli image file.

    As for schematics, no as far as I know they are never released.
    Only the (clone) ones I made.
     
  16. bibic

    bibic Active Member

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    Hello again,
    I check C264 and C665 and it's OK. But it's a problem; see on the picture.
    And circuit for C 812? Where come positive leg? I not find on motherboard.

    And vu duo is original. Just once It worked to install last original black hole image. But then was working all image what I try (clone and original image). Strange.

    Pieces F - 204, 206, 211 what is it? Some reels?
    Thanks
     

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  17. bibic

    bibic Active Member

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    Thanks
     
  18. Johnny B.

    Johnny B. Technical Support Staff Member Moderator

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    Q. USB front panel connector, possibly modified, or you look at the picture differently than I did.

    Q. F parts, which are inductors (coils), and have different uH values.
    When defect it usually not let it through, like a fuse, as well as measurable as a fuse.
    Measurable with ohm measurement.

    Or if the uH value is wrong, sometimes to see if the component is discolored/darker than normal.
    This is only measurable with a uH measuring device and sometimes only measurable if the part is removed.

    Q. C812, this I must measure again.

    About the software, as I said earlier, clone software on an original receiver may mess up the receiver.
    Then it may be possible that the box does not work reliably with other software, as tuner failures, hdmi failures or audio failures etc.
    Not always, but in some cases.

    Possible solution is to flash the box with a backup image file.
    New software change the box, a working (older) backup put it back as it was.
     
  19. Johnny B.

    Johnny B. Technical Support Staff Member Moderator

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    Q. C812, is feed from the inductor F803/U801.
    After it it goes to several cpu medium size smd ceramic caps printside and cpu pins.
     
  20. bibic

    bibic Active Member

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    I checked again C 812; It don't get anywhere positive leg. Can you put come schema for C812?
    Thanks.