Dm7020Hdv2-Freezes All the Time

Discussion in 'Hardware troubles and Repair support.' started by bumperbee, Aug 29, 2020.

  1. toysoft

    toysoft Well-Known Member Staff Member

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  2. bumperbee

    bumperbee Member

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    Thank you Toysoft
     
  3. bumperbee

    bumperbee Member

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    Hi Toysoft, as per your advice, I had tried the following images and the results are appended,

    1. Minicattv v1.0 - not receiving Dvb-T2

    2. Oozoon v4.0 - not receiving Dvb-T2

    3. Newnigma v4.0.5 - not receiving Dvb-T2

    4. Merlin 3 OE 2.0 dm7020hdV2 20131020 - not receiving Dvb-T2

    5. Gemini release dm7020hdv2 4.0.0 - not receiving Dvb-T2

    6. D.M.S-image-dm7020hdv2-OE2-v2.7 - not receiving Dvb-T2

    7. Dreambox image dm7020hdv2 20150618 - not receiving Dvb-T2

    8. Dreamelite dm7020hdv2 20131105031515 - not receiving Dvb-T2

    9. NewNigma2 stable dm7020hdv2 v4.0.12 - not receiving Dvb-T2

    10. OpenESI 8.0 20181111 – freeze after sometime

    Thank you
     
  4. toysoft

    toysoft Well-Known Member Staff Member

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    Which DVB-T2 do you have in your country ? Is it with H264 or H265 ?

    TS
     
  5. bumperbee

    bumperbee Member

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    Hi Toysoft, it is Dvb-T2 with H264. I am not sure about which Dvb-T2, after doing numerous searches I found the attached which may have the answer. Let me know if there isn’t, I will do further searches. Thank you
     

    Attached Files:

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  6. toysoft

    toysoft Well-Known Member Staff Member

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    Yes, I checked in your country the DVB-T2 started in 2013, and they used the H264.

    As I have no DM7020HDv2, it's difficult to test, I have only DM7020HDv1, but I would bet it's a bug on the drivers, so search for the drivers and history of each (generally the drivers are released with some infos on what was fixed), and check the newest ones, and replace them in your image... it could fix your issue, and if not try older ones, as they could have fixed adding bugs ;o)

    TS
     
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  7. bumperbee

    bumperbee Member

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    Hi Toysoft, thank you for the advice. I have always felt this too that Dmm had placed in some bugs to cause this problem. The box have been well-kept with total care and no overly used. There are only 5 daily recording timers and a maximum of 2 hours usage on playing the recorded shows. So I am quite sure there should not be a hardware problem and looking at the photos of the Pcb should tell there is no component damages. Please tell me where are these drivers located? In which folders please? Best Regards
     
  8. toysoft

    toysoft Well-Known Member Staff Member

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    This is the link on a DM800HDse (v1),

    /lib/modules/3.2-dm800se/extra

    So you can deduct the link where are the .ko driver files for yours,

    TS
     
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  9. bumperbee

    bumperbee Member

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    I did another test by using a 10 inch fan blowing directly to the components and it did not freeze at all. Does this means it is the component fault?

    I found 3 sets of pin connectors on the PCB, 14, 6 & 18 pins connectors as per attached. Please advise on the followings,

    1. Which connector can be used to connect a fan?

    2. Which pins should be used for the connection?

    3. The connector of the fan must have how many pins?

    4. What size of fan is most appropriate?

    5. The voltage of the fan is 12v?

    6. Wat is the maximum rated current (A) of the fan (Not to overload the power supply)?

    7. What is the maximum power (w) of the fan (Not to overload the power supply)?

    8. Which is a better fan, blow air in or suck air out?

    Thank you
     

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    Last edited: Oct 2, 2020
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  10. toysoft

    toysoft Well-Known Member Staff Member

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    Johnny ?

    Could be the termal paste on processor that dried, and so it does less it's job ? Needing then a fan to compensate the missing dissipation ?

    TS
     
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  11. Johnny B.

    Johnny B. Technical Support Staff Member Moderator

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    Fan questions...
    I.m not sure if these receivers already have a fan connector, but if I should guess, and based on the older version receivers, then it has not.

    Cpu terminal paste...
    And indeed, if the cpu has a heat sink then it could be related to the cpu terminal paste, but these receivers may also have not a heat sink or if they have one, then it may be difficult to remove.

    Fan ideas....
    If you want to add a fan, then you can better think of using a two pins 12v fan and taking the 12v from a 12v source.
    Or using a usb fan, and feeding it from a usb port (when these receivers has a usb port).

    Or using a four pins fan with a temperature controlled module between it which is feeded from a 12v source, something as this,
    fan-pcb.jpg
    These has a probe which you can place near the cpu and it will regulate the fan speed.
    You can find them and others on aliexpress for a few dollars.
    Just search for Fan Temperature Control or,
    DC 12V PWM 4 Wire Line Fan Temperature Digital Control Controller
     
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  12. bumperbee

    bumperbee Member

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    Thank you Guys, I’ll check it out in Aliexpress.


    One more question, is the supply voltage at the USB output on the box is 5v? Can it power-up the fan if I am able to buy one that uses a 5v?


    Best Regards to All
     
    Last edited: Oct 3, 2020
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  13. bumperbee

    bumperbee Member

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    Just found out, the Usb port is a 5v supply. Thank you
     
  14. Johnny B.

    Johnny B. Technical Support Staff Member Moderator

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    The Usb port has always a 5vDc output, however they are often weak to deliver a device with a high amps consumption.
    Thus, when you have plan's to use the usb port from the box, then you can better use a fan which it meant to be used with a usb power source, or use a max 5v/300 mA (miliAmps) fan or at least not higher than a 5v/500 mA fan.
    An higher consumption may damage the Usb voltage regulator chip.

    Or else, use a external 5v power source/adapter.
     
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  15. bumperbee

    bumperbee Member

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    Thank you Johnny for the detailed advices. Best Regards
     
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