800SE HIG024 Rev:6 not starting.

Discussion in 'DM800SE-E Hardware troubles and Repair support.' started by yesyes85, Apr 7, 2020.

  1. yesyes85

    yesyes85 New Member

    Messages:
    5
    Likes Received:
    6
    Trophy Points:
    3
    Gender:
    Male
    Hi all and congratulations for the site.
    My DM800se HIG024 Rev 6 2011-12-9 Estar Sim stopped working after restarting from the back.
    5 red leds (D200,D201,D202,D203,D204)on mother board, and the green led (D6)on tuner are lit,nothing else.
    On the print side of motherboard there is a little PCB with a burned component as can be seen on photo.

    volt and ohm measurements:
    7 - 0
    6 - 0
    5 - 4,93v / 31 Komh
    4 - 3,24v / 739 omh
    3 - 0,71v / 22 Komh
    2 - 1,81v / 30 omh
    1 - 1,26v / 412 omh

    Thanks for your help.
    Regards
     

    Attached Files:

    toysoft likes this.
  2. Johnny B.

    Johnny B. Technical Support Staff Member Moderator

    Messages:
    2,269
    Likes Received:
    1,026
    Trophy Points:
    113
    Gender:
    Male
    Location:
    Netherlands
    Home Page:
    Other voltages are still active but only the 2.5v seems to be the issue.
    This can be just a defective dc to dc converter and can be easily replaced for a new one, just as someone else had done.
    As far as I see it, it were original designed for a 1117 2.5v voltage regulator, but these are often only to use when it's not exceed the 1 Amps.

    In any case, the in and output are these..
    Estar-u1104.jpg

    I think, remove the damaged board and replace it for another dc to dc converter which are cheap to buy on aliepress but before you do I would advice to disconnect the 2.5v wire from the dc to dc converter, or motherboard and to check if the ohm value of the motherboard, 2.5v input gives a good ohm value.
    As for the converter board, search to dc to dc step down converter module, choose one which you can adjust.
    For example search to Module Mini 360 DC Buck Converter Step Down Module which can handle 2 amps, and can handle 4/23vDc input, and adjustable to 1v or higher.
    dcmini.jpg

    And, by this picture you can see all the Estar dm800se voltages overviews etc.
     
    yesyes85 and raza05 like this.
  3. yesyes85

    yesyes85 New Member

    Messages:
    5
    Likes Received:
    6
    Trophy Points:
    3
    Gender:
    Male
    Thank you very much for the informations.
    After disconnecting the 2.5v wire from the DC to DC converter, the Ohm value checked is fine(45,5Kohm) ,so I ordered the Mini 360 DC converter you suggested.
    I am not skilled in electronic.Are the in and output on the picture below correct?
    Where should i connect the OUT- on motherbord?
     

    Attached Files:

    Johnny B. likes this.
  4. Johnny B.

    Johnny B. Technical Support Staff Member Moderator

    Messages:
    2,269
    Likes Received:
    1,026
    Trophy Points:
    113
    Gender:
    Male
    Location:
    Netherlands
    Home Page:
    The wiring connection is correctly, and as for the min output, you don't have to connect it because the ground input is the same track, but if you still want it, just take a ground spot.

    Be aware, that when you have connect the input voltages, you must adjust the output to 2.5v or lower before you connect it to the 2.5v circuit.
    When adjusted, then connected it, check the output voltage again and adjust it between the 2.5 / 2.6 output voltage.
     
    yesyes85 and raza05 like this.
  5. yesyes85

    yesyes85 New Member

    Messages:
    5
    Likes Received:
    6
    Trophy Points:
    3
    Gender:
    Male
    Ok, thank you.
     
    Last edited: Apr 12, 2020
  6. yesyes85

    yesyes85 New Member

    Messages:
    5
    Likes Received:
    6
    Trophy Points:
    3
    Gender:
    Male
    I'm waiting for the converter and will get back as soon as i receive it.
     
    Last edited: Apr 12, 2020
    Johnny B. likes this.
  7. yesyes85

    yesyes85 New Member

    Messages:
    5
    Likes Received:
    6
    Trophy Points:
    3
    Gender:
    Male
    Hi Johnny B.
    I finally received my order after 45 days waiting.
    I replaced the damaged DC to DC converter with the new one adjusted to 2.5v output,
    and my DM800se is now back to life.
    Once again, thank you very much for your help, and the outstanding job you're doing on this forum.
     
    toysoft, Johnny B. and Aliraza63 like this.