DM900UHD Motherboard pictures

Discussion in 'Schematic drawings, Pcb images etc..' started by Johnny B., Dec 10, 2016.

  1. Johnny B.

    Johnny B. Technical Support Staff Member Moderator

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    Yeah good question, I didn't saw that it has 3 wires.
    In any case red/black are the input, when connected the fan should run.
    The yellow wire is the Tachometric Signal wire, when not connected the fan may run fully and I have no clue if the censor on it will work.

    Another solution could be to use a controller between a four wired fan something as this DC 12V Four Wire Thermostat PWM Fan Speed Controller Module.

    In any case, the four pins connector can not be used for a fan, I've tested this by connecting a four wire fan on it and installed the Fan2 controller plugging.
    It won't work, the fan does nothing and the software tells that there is no hardware.
    So the only way to add a fan to this box is to be inventive by building something by yourself.
     
  2. bibic

    bibic Active Member

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    Thanks Johnny for all answer. I think that the best solution is a cooler for USB. But winter is comming. Maybe on next summer.
     
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  3. bibic

    bibic Active Member

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    Today I made a script (from my raspberry pi) and I monitored the temperature on dm900 (cca 10-15 min). I use only HD and UHD channels. On 70 grd I put an old fan 12V (vu duo) to USB (5V). The temperature has fallen to 46-47 grd. On hd channels 46-47 grd and on UHD channels 48-49 grd. I think a cooler is a must on next summer.


    root@dm900:~# /usr/script/te.sh
    CPU Temp: 69.1?C
    root@dm900:~# /usr/script/te.sh
    CPU Temp: 69.6?C
    root@dm900:~# /usr/script/te.sh
    CPU Temp: 70.1?C
    root@dm900:~# /usr/script/te.sh
    CPU Temp: 69.6?C
    root@dm900:~# /usr/script/te.sh
    CPU Temp: 70.1?C
    root@dm900:~# /usr/script/te.sh
    CPU Temp: 70.6?C
    root@dm900:~# /usr/script/te.sh
    CPU Temp: 69.6?C
    root@dm900:~# /usr/script/te.sh
    CPU Temp: 69.1?C
    root@dm900:~# /usr/script/te.sh
    CPU Temp: 67.1?C
    root@dm900:~# /usr/script/te.sh
    CPU Temp: 62.8?C
    root@dm900:~# /usr/script/te.sh
    CPU Temp: 55.0?C
    root@dm900:~# /usr/script/te.sh
    CPU Temp: 50.1?C
    root@dm900:~# /usr/script/te.sh
    CPU Temp: 49.1?C
    root@dm900:~# /usr/script/te.sh
    CPU Temp: 49.6?C
    root@dm900:~# /usr/script/te.sh
    CPU Temp: 49.1?C
    root@dm900:~# /usr/script/te.sh
    CPU Temp: 49.1?C
    root@dm900:~# /usr/script/te.sh
    CPU Temp: 49.1?C
    root@dm900:~# /usr/script/te.sh
    CPU Temp: 48.1?C
    root@dm900:~# /usr/script/te.sh
    CPU Temp: 47.7?C
    root@dm900:~# /usr/script/te.sh
    CPU Temp: 46.7?C
    root@dm900:~# /usr/script/te.sh
    CPU Temp: 47.7?C
     
  4. bibic

    bibic Active Member

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    This is the script;

    #!/bin/bash
    cpuTemp0=$(cat /sys/class/thermal/thermal_zone0/temp)
    cpuTemp1=$(($cpuTemp0/1000))
    cpuTemp2=$(($cpuTemp0/100))
    cpuTempM=$(($cpuTemp2 % $cpuTemp1))

    echo CPU Temp: $cpuTemp1"."$cpuTempM"?C"
     
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  5. Johnny B.

    Johnny B. Technical Support Staff Member Moderator

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    Nice to know, thanks.

    However a fan is not always the holy grail for cpu's, because a cpu needs a temperature to operate on his best, same as you car motor, it needs to warm up for the best performance.
    And a cpu may exceed the 60C and still gives no issues.
    The weak place is the solder under the cpu and therefor when a box failed it's mostly due a solder under it.
    For example, a cpu placed on a socked will life much longer and give less issues than one which has been soldered on-board because the heat under it has a better airflow.
    Better (I think) is to cool the motherboard (cpu sector) under it with a sort of fan to expand the lifetime of a box.

    So I have also a theory why a box often failed when there is a power source failure.
    I think that it mostly happens when a box never switched Off or only set into the standby.
    The motherboard has therefore been warmed up every day on the same temperature, and when there is a power source failure the motherboard becomes under a lower temp, than it usual was.
    The solder connection under the cpu may shrink and gives afterwards the well known issues.

    A (new) box that will be switched off every day lives longer to my experience.
     
  6. bibic

    bibic Active Member

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  7. Johnny B.

    Johnny B. Technical Support Staff Member Moderator

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    Yeah indeed but because he want to earn money from it he does not show were the on/off button wires goes to.
    Maybe it's just make a contact from a spot, or there is a small self made circuit under it.

    Snap1.jpg
     
  8. bibic

    bibic Active Member

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  9. bibic

    bibic Active Member

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    Maybe 12V come from voltage hdd?? And exist just one on/off button. Low temperature (35 grd) can be obtained only with 12V.
     

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  10. Johnny B.

    Johnny B. Technical Support Staff Member Moderator

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    Yeah indeed some clones DM900 needs a free upgrade 1000M network port service, very strange that they screwed it up by the production.
    And no, it's not logic that there is a 12v connection because the hdd bracket can only handle the 2.5-inch SATA Hard Drive which needs only the 5v.
    If he had used a 12v connection then it's most likely from the cap side 12v
    12Snap1.jpg
    However I wonder if he only takes the 12v from it, I'm more thinking that he use a self made regulated circuit.
     
  11. AJP007

    AJP007 New Member

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    Hi Johnny, nice to see that you have a DM900 UHD,
    I am waiting for mine as well BUT it will be a Clone with SIM 2.30 which I can change to a JapharSIM when they are ready.

    TS has told me JapharSIM 2.30 is in the Pipeline first DM8000 then DM900, so thats really great news.

    What is interesting here is the mention of the Silicon Tuner.!
    Do you have one already Johnny.? is it better and what please is the advantage.?

    Secondly i see you have discussed Heat issues...it gets very HOT i read (approx 70°C)
    so do you recommend a Fan for this Box.?
    would this be what we require if at all.?
    https://www.ebay.ca/sch/Test-Measurement-Inspection/181939/i.html?Brand=Unbranded%2FGeneric&_nkw=40x40+fan
    It seems strange that the developers would produce a Receiver with these Heat problems, what is your opinion?
    Many questions Johnny but as soon as i get my box i will start to test and experiment as always.!

    At present DHL Delivery pick-up delays of 15 days at China Dealers ..plus the Chinese New year until 25th Feb,
    so my dealer says about end of March 2018 before they get back to normal.!

    So still time to learn all about this Box..again a new learning curve with ARM-based Receivers.

    Cheers
    Andrew
     
  12. Johnny B.

    Johnny B. Technical Support Staff Member Moderator

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    Yes mine is equipped with the Silicon Tuner and it has a stronger/stabler signal then the regular tuners by my experiments, also switching channels feels faster.
    In any case a worthy upgrade for the dm900uhd.

    As for the fan, normally are the original equipped with a good heath sink and does not required a fan.
    The clone version has a small heat sink which is not sufficient for these type cpu's, after time the cpu may become defective, or at least the solder balls connection under it.

    As a solution, I prefer the same solution as the computer video cards with pressure springs for the heat sink.
    This solution will prevent that the solder balls under the cpu may become disconnected when heating up.
    However, it will always be a weak spot, cpu's which are mounted with a socket will give less problems over time.
    Just as you experiences with you desktop pc, it never, or at least rare gives a issue when it's mounted with a socket.

    But about the fan, I would choose for a 5v fan, one with less amps consumption, even better if it has a temperature probe which regulate the fan speed.
     
  13. AJP007

    AJP007 New Member

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    Johnny, Thanks for your speedy reply,
    So basically you would recommend the Original Box.!
    But should a problem arise it will be fixable...right.?
    I have a friend who can do Micro Solder work.!
    But we never had any problems with the generation of Ferrari DM Clones.!
    Were they so different.?
    Merde...Now you have made me uncertain what to get Original or Clone.!

    About Triple Hybrid Silicon Tuner have sent message to my China Girl about it this morning.!

    OK.. will think about it. ;-))
    Cheers
    Andrew
     
  14. Johnny B.

    Johnny B. Technical Support Staff Member Moderator

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    Yeah although the clone versions as the 800hd/8000hd/800se etc were become better then the original due the modifications, but it is a bit different with the dm900uhd.
    That is, the first releases due the cheaper solution as the heat sink, that is as I see it.
    Nevertheless I have no doubts about the technical part.
    However since I wanted the box when they were released I bought the original, but do not think that they have no issues, even the original may become defective.

    As for the repairable, as long it's not related to the cpu then it could be repairable.
    Most parts are no secret, and can be found on sites as ebay.
    The only dc/dc part which I'm a bit concerned of is the ones which delivers 3 voltages as the U1901/U1902, I would prefer it separately but they probably done it to save space.
    But so far I have not got a repairs with this ic's, only one issue with a usb port voltage delivery which was caused due the U1502, other case was a issue with the 5v for the hdd caused because the owner used a old hdd which uses much amps.
     
  15. AJP007

    AJP007 New Member

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    Super. OK
    Thanks Johnny for the Info's will continue with the idea of buying the one with Sim 2.30 Clone.
    I am just waiting for replies from Dealer concerning the date of Box delivery and availability of the Tuners

    Silicon Twin Tuner China price ($62 approx €48) incl delivery.

    https://de.aliexpress.com/item/Traum-Dual-Tuner-dvb-s2-f-r-DM900U-HD-DM7080-HD-DM820-HD/32842012777.html?spm=a2g0x.search0104.3.1.6fe1a5f6tmqDRP&ws_ab_test=searchweb0_0,searchweb201602_5_10065_10344_10130_10068_10324_10342_10547_10325_10343_10340_10548_10341_10192_10190_10084_10083_10618_10307_10301_10303_5722316_10313_10059_10184_10534_100031_10103_441_10624_442_10623_10622_10621_10620_10142,searchweb201603_36,ppcSwitch_5&algo_expid=1e2e821e-575e-4a3a-9f67-5944a4d47e3c-0&algo_pvid=1e2e821e-575e-4a3a-9f67-5944a4d47e3c&priceBeautifyAB=0

    Silicon Triple Hybrid China price ($74-$82 approx €59-€65) incl delivery.

    https://de.aliexpress.com/item/Newe...id=f7cfdc04-f15d-4015-9529-cbf50f3da33e&tpp=1

    I hope these are good ones and function well, after looking and reading the Specs seems and looks OK.

    Just no mention of whether they can handle European Multi Streams..!

    If I have posted anything you don't permit in your Forum Johnny, Please feel free to delete .OK

    Cheers
    Andrew
     
    Last edited: Feb 3, 2018
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  16. bibic

    bibic Active Member

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    I have dm900 sim 2.30 triple tunner from autumn 2017. Work very well; with the exception of heating (cca 70 grd C without cooler) and 100 mbps network speed. Poor software support - http://dreamnew.co.uk/
     
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  17. Johnny B.

    Johnny B. Technical Support Staff Member Moderator

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    @AJP007

    Yeah well, I prefer in this case the original stuff due the guarantee and easy to find software, so also the less risk with the online updates and the big heat sink with two screws mounted to the motherboard instead of the clone glued small heat sink of the clone.
    And, I think that you can still use the japhar card for it if when it's released.

    Further I have no problem with the discussion on this topic, it's related.
     
  18. toysoft

    toysoft Well-Known Member Staff Member

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  19. AJP007

    AJP007 New Member

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    @Johnny, OK Thanks Yes it is all related.

    @toysoft, Hi Buddy,
    DM900UHD sim2.30 Clones come with both Tuners as a standard NOT Hybrid/Silicon
    1.) "Triple (DVB-S2/C/T2) Tuner" like here,
    https://de.aliexpress.com/item/1-ST...435.html?spm=a2g0s.8937420.0.0.2e8b8b8bLPLYtQ

    2.) "Twin or Dual DVB-S2" like here,
    https://de.aliexpress.com/item/DUPE...id=7c495f7d-08bf-47e7-a3a6-f84cb32b47a5&tpp=1

    But TS, if you scroll down on that page in the Link for Twin Tuner and go to the Picture of the Twin Tuner it is clearly marked "S2X-MS" above the "dreambox" wording, bottom left corner...so for me that means its a Twin Hybrid/Silicon Tuner with MS (Multi Stream).....BUT... is it only the Picture they used or is IT really the "Twin Hybrid/Silicon S2X-MS" INSIDE for that price.?

    The price difference is very minimal for both Models with the standard Triple or Dual/Twin Tuners.

    Like I mentioned in the post above the Silicon Tuners ARE there to buy.
    I am waiting for a reply from my Dealer Girl if they have them definitely available and already in the Box or can they exchange the Standard Triple and Twin for the Hybrid/Silicon ones, but as you know its very difficult to communicate with them cos they only answer once a Day and NOT on Saturday or Sunday.!!!
    The answers are NOT very reliable you have to ask three times for them to answer a question...either they don't understand or they are being difficult, i don't know.!!

    @bibic, so you have the SIM2.30 Clone with a standard Triple Tuner.
    OK ...and if i understand you correctly you are NOT very happy about certain aspects of the Clone Box...
    Heat (70°C) , 100 mbps network speed, and poor support, understood, thanks for the Info.
    (I have read some of your posts at Linux.)

    So Johnny what is the Original Box Network speed is it also 100 mbps.?
    That the Originals have a better CPU connection is clear and you have the new Silicon Tuner,
    which is great, is it a Triple or Twin?
    Does it also do the Multi Streams...is it the S2X Model..?
    and you said you are happy with it right, fast channel change and more stable/ stronger signals.
    It also supports true Blindscan, is that correct.?
    and lastly does the Original Box get as HOT as Bibic's Clone Box.?

    After all this Info exchange, I am very tempted to go for the Original Box with a new Silicon Tuner that can Multi Stream, namely the S2X Model.

    Yes even with the Original Box the JapharSIM will still work, I am sure.!

    So its back to the drawing board as they say and have to sleep on the decision Original with Silicon Tuner or Clone SIM2.30..that's the question.!
    Will keep you posted Guys..Thanks for the Info exchange really GREAT

    Cheers and Merci
    Andrew
     
    Last edited: Feb 4, 2018
  20. toysoft

    toysoft Well-Known Member Staff Member

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    There is 2 versions of the Triple Tuner, one is S2X and one is S2X with Multistream, it depends of the ST chip on the board. The Clone is the S2X (not Multistream).

    TS

    Nochmal zum mitlesen auf deinem Tuner ist aufgedruckt MOD2017/02 =
    Si2169C = KEIN Multistream = 99€ UVP

    Den Tuner den du haben willst hat aufgedruckt MOD2017/06 + S2X-MS =
    Si2169D = Multistream = 129€ UVP
     
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