Vu+ Duo2 measurements

Discussion in 'VuPlus Duo2 Schematic drawings, Pcb images etc..' started by Johnny B., Mar 28, 2018.

Tags:
  1. Johnny B.

    Johnny B. Technical Support Staff Member Moderator

    Messages:
    2,816
    Likes Received:
    1,501
    Trophy Points:
    113
    Gender:
    Male
    Location:
    Netherlands
    Home Page:
    These measurements could be handy if you have a hardware issue with your motherboard.
    It may tell which circuit gives a issue.

    Click on the picture for a full view.
    Good luck,
    Duo2-ohm-measurements.jpg

    Voltages overview which were already posted in this topic,
    [​IMG]

    These are the U702/U825 measurements however keep in mind that the U702 voltage outputs is not present if the box is not booting up and is as far I see it to feed the fan.
    [​IMG]
     
    tuin and tomeek.p like this.
  2. Aliraza63

    Aliraza63 Active Member

    Messages:
    117
    Likes Received:
    206
    Trophy Points:
    43
    Gender:
    Male
    Hi
    My dear friend Johnny .
    wish you will be fine and enjoying good health.
    I will request you kindly put some light over VU+ Duo2 built-in Wi-Fi section , its chip , its location and volts measures . there are number of boxes have lost their wifi during updates . some time peoples ask me at vu+ panel about its Wi-Fi hardware section . I reply them according to my information but its not enough often .Through google search cant find exact answer that how it has happened . Just for the helping purpose and information I need to have the exact information . e
    Always thankful for your kind help and support .
     
    raza05 likes this.
  3. Johnny B.

    Johnny B. Technical Support Staff Member Moderator

    Messages:
    2,816
    Likes Received:
    1,501
    Trophy Points:
    113
    Gender:
    Male
    Location:
    Netherlands
    Home Page:
    Hi,
    To date I have never known or noticed that these boxes should have WiFi on board, at least not noticed in the box I have. But right now I don't have access to this receiver, but I can on Monday, so I'll investigate tomorrow.
     
    Aliraza63 and raza05 like this.
  4. Aliraza63

    Aliraza63 Active Member

    Messages:
    117
    Likes Received:
    206
    Trophy Points:
    43
    Gender:
    Male
  5. Johnny B.

    Johnny B. Technical Support Staff Member Moderator

    Messages:
    2,816
    Likes Received:
    1,501
    Trophy Points:
    113
    Gender:
    Male
    Location:
    Netherlands
    Home Page:
    Yeah, I now see it, mine has (of course) also this WiFi option, but it's pretty old and thus may not work on all WiFi systems.
    I think it's integrated, same as the network in to the U208 RTL8211 chip.
    U208-Snap.jpg

    This chip is not so easy to measure without a scope, as also very risky to do, and I have not the impression that it will be a hardware issue when only the wlan of it failed.
    U208ds-Snap.jpg

    Nevertheless, they must at least see it in to their network settings, the Wlan and Network, otherwise, when they only have the network option, than it seems to me more related to the drivers.
    Probably they use other drivers than the correct one as for in this case, the drivers for the RTL8211EG

    screen01-Snap.jpg

    In any case it works in my case without any issues with the openpli 8.0, with no extra drivers added.
    screen02-Snap.jpg
    screen03-Snap.jpg


    Based on this, it seems to me most logic that it's not a hardware failure because all the network is working with one chip, and by a hardware problem it seems to me not logic that then the network part still works.

    This seems to me only possible when using drivers which not support the (old) wlan, and thus than also not appears in the menu.
    Or when appears, but not connect may be related to the old/new wlan network, or due the weak receive/send signal strength of these wlan chip.

    NOTE the above information, as that it's also used for the wifi is incorrect, this chip handles only the network.
    I will add the correct info about it soon.
     
    Last edited: Feb 10, 2021
    raza05 and Aliraza63 like this.
  6. Johnny B.

    Johnny B. Technical Support Staff Member Moderator

    Messages:
    2,816
    Likes Received:
    1,501
    Trophy Points:
    113
    Gender:
    Male
    Location:
    Netherlands
    Home Page:
    Okay, it was a bit hidden behind the front panel but here it is,
    Vuplus-duo2-wifi-info-00.jpg

    When taken a closer look, you see it has the RT5372L chip on it,
    Vuplus-duo2-wifi-info-01.jpg

    And further it is basically an usb Wifi stick, without the usb connector as you can see on this picture, it uses the same four connection as also used with a usb stick.
    All the connections for it are coming from the flat cable.
    Vuplus-duo2-wifi-info-02.jpg

    The Data connections (D+/D-) is normally direct from the cpu, the 5v is delivered/controlled by the U402 8pins ic, located after the cardreader of the motherboard.

    Detailed description of it,
    WIFI module, size: 18*34*1MM, solution:
    RT5372L Ralink brand, with two antenna interfaces,
    WIFI module requirements voltage 5.0V
    pin hole spacing 2.0
    external antenna
    download frequency 300M

    Further there is not much to say more about it, it has a led onboard and this led reacts (flashes) when there is some activity, when not then it's on.

    In any case, it is in fact a usb version and can be replaced when needed.
     
    raza05 and Aliraza63 like this.
  7. Aliraza63

    Aliraza63 Active Member

    Messages:
    117
    Likes Received:
    206
    Trophy Points:
    43
    Gender:
    Male
    Hi Good Morning.
    Well done Johnny . Great man great job . thats what I was looking for .
    Yes. The RTL8211EG is the ethernet PHY, the fixed 10/100/1000 ethernet chip.
    After your last inspection I checked thoroughly and saw my box 's builtin wifi was not working I was unable to see WLAN in network . after number of tests and checking in images scripts I saw the driver was already there . there was no driver issue . finally after clearing my doubts just for the checking purpose .yesterday I have replaced my duo2 board with new one bought from VU + franchise (some months before).
    But that time again the result was same . No Wlan in network . I still have doubt if its not hardware issue it must be ceased in any kind update. There are lots of peoples around owned box duo2 but silently one day they have found the builtin wifi is not working . I have opened this topic regarding script/software issue in our Openpli developement lodge . we are talking about it and finding the clues in script as well.
    I shall inform you here about my updates .
    Once more again thanks for your kind support and efforts . its priceless
    Wish for your happy and healthy life .
    Regards
     
    raza05 and Johnny B. like this.
  8. raza05

    raza05 Active Member

    Messages:
    138
    Likes Received:
    217
    Trophy Points:
    43
    Gender:
    Male
  9. Johnny B.

    Johnny B. Technical Support Staff Member Moderator

    Messages:
    2,816
    Likes Received:
    1,501
    Trophy Points:
    113
    Gender:
    Male
    Location:
    Netherlands
    Home Page:
    I have no idea why you like to connect a wifi board to this fpga chip programmer port.
    As also, if it can be done, and will work.

    If you like to replace the wifi of the front panel, then the easiest way I think is to take a usb wifi stick and to dismantle it as also removing the usb connector before mounting it.

    Other options/ideas are not to use the wifi usb port, or to add wires with a usb connector to it, and to connect a usb wifi stick, or use a usb wifi stick into another usb port.

    In any case, all these ideas are only usable if the image file had the drivers for it, or the possibility to add it, otherwise it will also not work.
     
    raza05 and Aliraza63 like this.
  10. raza05

    raza05 Active Member

    Messages:
    138
    Likes Received:
    217
    Trophy Points:
    43
    Gender:
    Male

    Thanks for the reply ..It was just for experiment purpose I want to try on Solo 2 ..still I have no chip ..so nothing an be done .. any ways thanks again for valuable reply ..
     
    Johnny B. likes this.
  11. Johnny B.

    Johnny B. Technical Support Staff Member Moderator

    Messages:
    2,816
    Likes Received:
    1,501
    Trophy Points:
    113
    Gender:
    Male
    Location:
    Netherlands
    Home Page:
    Always educational and exciting, experiment ideas .. but uhmm..
    ... still I have no chip ...
    Which chip, the fpga chip for a solo2?

    If that's so, and you have some vu+ part, then you could try the fpga chip from a duo2 to the solo2 or from a solo2se etc..
    I think that it has a good chance that it will work.
     
    raza05 likes this.
  12. raza05

    raza05 Active Member

    Messages:
    138
    Likes Received:
    217
    Trophy Points:
    43
    Gender:
    Male

    yeah ... I 'll try it soon ..I 'll also order on aliexpress this wifi module ..let's see what comes out
    Thanks again...you are great
     
    Johnny B. likes this.
  13. tuin

    tuin New Member

    Messages:
    7
    Likes Received:
    2
    Trophy Points:
    3
    Gender:
    Male
    Dear All,
    First of all best wishes for 2023!! I (Cees) have a challenge,

    My Duo2 is defective and probably caused by myself !!
    I have already been measuring and U702 and U825 are not controlled, and leg 3 of U 705 remains low..
    (leg 8, 11 and 6 are high of the U705)
    I do not see any voltages on U817.
    Most likely I accidentally contacted the VCC pin of U 825 with the Ctrl pin with my measuring action , so that 12v ended up on the Ctrl pin.
    Does somebody have some advice to make the Duo2 come back to life??
    And has somebody a schematic of this Satbox ?

    Thanks in advance and m.vr.gr, Cees
     
  14. Johnny B.

    Johnny B. Technical Support Staff Member Moderator

    Messages:
    2,816
    Likes Received:
    1,501
    Trophy Points:
    113
    Gender:
    Male
    Location:
    Netherlands
    Home Page:
    I'm not sure if and what can happen if the crtl pin gets the 12v, I'll have to check that later to get an idea if this will harm the dc/dc converter.
    But since this ctrl pin (sort of 0f protected) is bridged with a zero ohm resistor R855 (see here for more on this), you need to check that it's still passing and not interrupted.
     
    raza05 likes this.
  15. tuin

    tuin New Member

    Messages:
    7
    Likes Received:
    2
    Trophy Points:
    3
    Gender:
    Male
    Johnny,
    I have measered R855 and it is about 0,01 Ohm, (zero ohm) and no voltage on both side's of R855.
    The resistance values are normal from U815 (GND to all the connections/pins)
    Thanks <> Cees
     
    Last edited: Jan 2, 2023
  16. Johnny B.

    Johnny B. Technical Support Staff Member Moderator

    Messages:
    2,816
    Likes Received:
    1,501
    Trophy Points:
    113
    Gender:
    Male
    Location:
    Netherlands
    Home Page:
    In that case it could be the U705 (M74HCT32), maybe the pin 3 of it is damaged, or the vcc voltage input pin 14 of it has no longer the 5v from the U810 pin 5 output for some reason.

    See the drawing right beneath for more about this QUAD 2-INPUT OR GATE chip voltages, but remember that these where measured while the box was operating, this chip must have the vcc 5v to operate, thus to switch on the other dc/dc ic's.
    Without it, or when defective, or one gate from it, the dc/dc ic will not become active.

    There is a good change that you probably have to replace the U705 with a new one if you actually had sent 12v to pin 3 of this chip, nevertheless check/measure it first before you do, best is to measure it not on the legs, but the resistors/caps connected to it.
     
  17. tuin

    tuin New Member

    Messages:
    7
    Likes Received:
    2
    Trophy Points:
    3
    Gender:
    Male
    Johnny,
    I can tell you that pin 14 from U705 is 5v and also pin 8,11 and 6 are 5V, so only pin 3 is 0V, so I think you are right that this IC could be demaged .
    D you know a store in Holland you deliver this IC ??
    Can I do a test to put 5v on pin1 off U825 to see if the receiver is booting or will this not work ?
    And is the pin setting from U 817 (GND & Input 5 V) correct on the schematic ?? (See also U 822/826 / 821 and 920)
    [​IMG]
    Thanks <> Cees
     
    Last edited: Jan 2, 2023
  18. Johnny B.

    Johnny B. Technical Support Staff Member Moderator

    Messages:
    2,816
    Likes Received:
    1,501
    Trophy Points:
    113
    Gender:
    Male
    Location:
    Netherlands
    Home Page:
    Q: store in Holland you deliver this IC ??
    A: Right now, thinking of Conrad, or Rsonline

    Q: Can I do a test to put 5v on pin1 off U825
    A: Maybe, never tried, I normally would replace the chip etc but when you do, keep it under the 5v and check if the U825 delivers the correct output voltage when you do, when to high, then you will probably i think damage the U812.
    When not have any output voltage, or way to low, and you have the 12v input, than you may probably also need to replace the U825.

    Q; U 817
    A: Yeah I see what you mean, pin 1 and 3 are swapped, but still, the center pin is always the one to check if it gives the right output voltage.
     
  19. tuin

    tuin New Member

    Messages:
    7
    Likes Received:
    2
    Trophy Points:
    3
    Gender:
    Male
    Johnny,

    Thanks for the reaction,
    I have put 5V on the CTRL pin from U825 and the receiver is Booting !!! :):):):):)
    So I shall replace U705 for a new one. (I have ordered it allready by Aliexpress)
    Thanks for your info/advice.

    Greatings <> Cees
     
    Johnny B. likes this.
  20. Johnny B.

    Johnny B. Technical Support Staff Member Moderator

    Messages:
    2,816
    Likes Received:
    1,501
    Trophy Points:
    113
    Gender:
    Male
    Location:
    Netherlands
    Home Page:
    Glad to hear, and also the lesser damage it has.
    And glad I was able to help you with it, and maybe it will help others reading this too.