Problem tuner A (empty) in dreambox 800hd pvr

Discussion in 'DM800HD Hardware troubles and Repair support.' started by rachidTAN01, Oct 17, 2020 at 10:15 AM.

  1. rachidTAN01

    rachidTAN01 New Member

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    hello
    Thank you very much for this wonderful and valuable website
    I have dreambox 800 HD PVR clone sim 201 ssl84d work fine with image open pli 7
    My problem is Tuner A : empty (nothing) type REV-M.
    I maintained, cleaned and re-soldered some parts from tuner, unfortunately, I did not notice a fult line between the ground and the positive capacitors c110 and c118, and when I turned on the device the capacitor c217 is destroyed (short circuited) and maybe other composants not sure.
    When I found a set of information about problems tuners on this site, I thank them very much, I replaced the capacitor c217 with other value of 22uf / 16v (i see in tuner rev-j-k) then i test device (tuner empty) after i change capacitor c26 (1000uf/16v) with other (470uf/16v) then i test no ok same problem tuner A (empty)
    I test image open pli, black hole, open atv, gp3, merlin3 and i change bootloader and doing bad sector but no solution always same problem
    i checked and verified tension 3.3v, 5v, 12v for pin slot tuner and circuit chip lnbp21 is ok
    I check mesure output lnb (6 kohm somtimes 16kohm)
    i change capacitor c276 with resistor 510 ohm then i test no ok it is same
    What is the correct value of the capacitor c217
    Please help me to find a solution to this problem if possible thank you very much and sorry for my bad english
     
    Last edited: Oct 17, 2020 at 10:21 AM
  2. Johnny B.

    Johnny B. Technical Support Staff Member Moderator

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    c217 = 22UF 5X6MM 16V ±20%

    Of course there is no problem to just ask for this info, but you could also find all the values of all the parts into this dm800hd (xml) parts list topic.
     
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  3. Johnny B.

    Johnny B. Technical Support Staff Member Moderator

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    I also advice you to take a look to this, Tuner or tunerslot issues, mainly the U18 mod if you not have there the 510 ohm resistor.
    I'm not saying that it will help, but may.

    Ow, I notice that you already have done it, which not helped in your case.
     
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  4. rachidTAN01

    rachidTAN01 New Member

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    Thank you very much for your reply and your informations.
    What are the reasons behind this problem, knowing that the device was working well until I fell into the mistake that
    I made with regard to the device card, so it is sound and that all the tensions are ok
     
  5. Johnny B.

    Johnny B. Technical Support Staff Member Moderator

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    It depends of what you mean with the device card.
    When you means, that you have replaced the sim card and after it has this issue.
    Then it may be related to the boot loader or software version and the type sim card.
    Best way is to check it with a terminal tool as putty in serial mode,
     
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  6. toysoft

    toysoft Well-Known Member Staff Member

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    When the Tuner is not there, it means the driver is not loaded, it is generally because the sim-driver are not compatible together...

    TS
     
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