PSU Problems Vu duo V3

Discussion in 'VuPlus Duo Hardware troubles and Repair support.' started by mpgtar, Oct 6, 2016.

  1. mpgtar

    mpgtar New Member

    Messages:
    9
    Likes Received:
    3
    Trophy Points:
    3
    Gender:
    Male
    Hello people.

    I live in Argentina, I have a Vu Duo Chinese V3 change the image open pli by a black hole, then put the list of of satellites.xml, I do a service scan and the receiver starting, then to change channels after 3 changes channels also joins the starting, he had a psu parts, the change and started working fine.
    Now living in Argentina, it is very difficult to get a new psu, someone has experience with this type of failure, if I change the capacitors could work again this psu ?, which quality change and what to wear?

    Thanks and sorry for my English?
     
  2. Johnny B.

    Johnny B. Technical Support Staff Member Moderator

    Messages:
    2,822
    Likes Received:
    1,503
    Trophy Points:
    113
    Gender:
    Male
    Location:
    Netherlands
    Home Page:
    Hi,

    It sounds to me a psu bad cap issue.
    I think the best is to look at the caps and replace the ones that look suspicious.
    Question quality caps, this you can read the best on the site from tomshardware
    His article goes about psu caps.

    This example picture shows some bad and good caps, check if you have caps which are not flat or leaks on the top.

    bad-good-caps-example.jpg
     
  3. mpgtar

    mpgtar New Member

    Messages:
    9
    Likes Received:
    3
    Trophy Points:
    3
    Gender:
    Male
    Thank you Johnny B. for answering so quickly. the strange thing is I do not see inflated caps, only the described problem
     
  4. Johnny B.

    Johnny B. Technical Support Staff Member Moderator

    Messages:
    2,822
    Likes Received:
    1,503
    Trophy Points:
    113
    Gender:
    Male
    Location:
    Netherlands
    Home Page:
    Yeah indeed, the caps looks fine.
    So, to think of a cap issue is difficult to determine.

    I think, the first thing you must try to examine is which voltage it may caused, most logic is to think that one of the voltage drops.
    I have here a nice drawing of the voltage overview on the topic, vu duo psu pcb connector measurements.

    But if you have a hard drive connected to the power supply, disconnect that first and check if the issue has been solved.
    If so, then it could be a issue with the 5v circuit, or the 12v which depends of what type hdd you use.
    A laptop hdd uses only the 5v, the computer size hdd's uses 5 and 12v.

    If you have no hdd connected, then you could do a test with a hdd connected to it to see if it happens more often than before.
    Then you know at least that it's related to the 5v, or 12v when you use the pc hdd.
    In any case, see if you can find the voltages that drops when it happens.

    Or else, buy a new vu+ duo psu on ebay, but they are not really cheap.
    However if you do, and you buy a original psu, then check the on/off switch wires how they are connected.
    There could be a differences how it is connected between a clone power supply and a original.
     
  5. mpgtar

    mpgtar New Member

    Messages:
    9
    Likes Received:
    3
    Trophy Points:
    3
    Gender:
    Male
    In the HDD CONECCION in for you down the source solder two wires one at 12 V and the other to GND and place a fan when restarting occurred, was connected to the fan, disconnect it today and did a service scan 6 satelites late as an hour, I had put happy he did not have any restarting, but after changing like 10 Vexes on several channels made a satarting, and then a scan service to one satelita also, so it began to fail again .

    If I change the capacitors, I have a chance this is resolved ?, since buying a new psu on ebay europe I get very expensive.

    I have another psu China and that works well, so far
     
  6. Johnny B.

    Johnny B. Technical Support Staff Member Moderator

    Messages:
    2,822
    Likes Received:
    1,503
    Trophy Points:
    113
    Gender:
    Male
    Location:
    Netherlands
    Home Page:
    Caps replacement may help to solve this problem, but it's not a guarantee that it helps.
    There may also be other causes which may give this problem as a to low voltage.
    But still, often it helps to replace the caps.
     
  7. mpgtar

    mpgtar New Member

    Messages:
    9
    Likes Received:
    3
    Trophy Points:
    3
    Gender:
    Male
    Really thank you very much for your help Johnny B is all so weird this problem !!! :) :), When it is tuned to a given channel TV on restarting occurs, switch to another channel now and I'm doing a service to a single satellite scan and there was the restarting !!! and is ending the scans q takes about 20 minutes
     
  8. Johnny B.

    Johnny B. Technical Support Staff Member Moderator

    Messages:
    2,822
    Likes Received:
    1,503
    Trophy Points:
    113
    Gender:
    Male
    Location:
    Netherlands
    Home Page:
    It's not clear if this happens with a good psu, or the defective one.
    But if this happens with a good psu than it can be several causes as the nand flash chip, memory chips or even the cpu.
    However it can also be caused by the software, so be sure that there are no issues known with the software you use.