Dm900 triple tuner

Discussion in 'Hardware troubles and Repair support.' started by DM900, Feb 3, 2023.

Page 1 of 2
  1. DM900

    DM900 Member

    Messages:
    42
    Likes Received:
    11
    Trophy Points:
    8
    Gender:
    Male
    Hello Jonny sir how are you i have a dm900 triple tuner which is now dead because of short-circuit in lnb a little ic demaged is there any possible way to recovery this tuner i will post pictures of tuner later because i am out of my home
    Thanks
     
    DM900, Feb 3, 2023
    #1
  2. Johnny B.

    Johnny B. Technical Support Staff Member Moderator

    Messages:
    2,887
    Likes Received:
    1,547
    Trophy Points:
    113
    Gender:
    Male
    Location:
    Netherlands
    Home Page:
    Lightning strike damage is often not repairable, it is often not limited to one part, there is often more damage.
    But there are of course exceptions.

    I can't say for sure if it is only limited to the faulty chip, nor is there a schematic of it, or a sharp/good quality picture showing the ic marking number.
    I do not have this tuner myself, to view it.

    Nevertheless, show a picture of the faulty part, and maybe I can help you, or maybe another member.
     
    Johnny B., Feb 3, 2023
    #2
    raza05 and DM900 like this.
  3. DM900

    DM900 Member

    Messages:
    42
    Likes Received:
    11
    Trophy Points:
    8
    Gender:
    Male
    IMG_20230204_124227.jpg
    Sir here I send picture of tuner it is not actual tuner picture but i marked the area of ic which is demaged
    Only one ic is demaged
     
    Last edited: Feb 4, 2023
    DM900, Feb 4, 2023
    #3
    Johnny B. likes this.
  4. Johnny B.

    Johnny B. Technical Support Staff Member Moderator

    Messages:
    2,887
    Likes Received:
    1,547
    Trophy Points:
    113
    Gender:
    Male
    Location:
    Netherlands
    Home Page:
    That is the U4 and has the NBH26L markings code, and is the LNBH26L chip pins model QFN24.
    For more about it see the included datasheet or search to the LNBH26L datasheet.
     

    Attached Files:

    Johnny B., Feb 4, 2023
    #4
    DM900 likes this.
  5. DM900

    DM900 Member

    Messages:
    42
    Likes Received:
    11
    Trophy Points:
    8
    Gender:
    Male
    Sir there is one more problem U4 some bases are demaged due to short-circuit and where can I buy it
     
    DM900, Feb 4, 2023
    #5
  6. Johnny B.

    Johnny B. Technical Support Staff Member Moderator

    Messages:
    2,887
    Likes Received:
    1,547
    Trophy Points:
    113
    Gender:
    Male
    Location:
    Netherlands
    Home Page:
    Print track damages are mostly repairable or else tricky to repair, or in some case when one of the internal print track layers are damaged often no longer repairable.

    LNB Ic question, where to buy, aliexpress, or google search for LNBH26L seller
     
    Johnny B., Feb 4, 2023
    #6
    raza05 and DM900 like this.
  7. DM900

    DM900 Member

    Messages:
    42
    Likes Received:
    11
    Trophy Points:
    8
    Gender:
    Male
    Thanks sir
    I will upload real picture of tuner tomorrow
     
    DM900, Feb 4, 2023
    #7
    Johnny B. likes this.
  8. DM900

    DM900 Member

    Messages:
    42
    Likes Received:
    11
    Trophy Points:
    8
    Gender:
    Male
    IMG_20230206_141338.jpg Sir sorry for delay here is the actual tuner picture IMG_20230206_140207.jpg IMG_20230206_140157.jpg
     
    DM900, Feb 6, 2023
    #8
  9. Johnny B.

    Johnny B. Technical Support Staff Member Moderator

    Messages:
    2,887
    Likes Received:
    1,547
    Trophy Points:
    113
    Gender:
    Male
    Location:
    Netherlands
    Home Page:
    The U4 is of course blown, the Diode S1M D1 too, and the Diode B34 D2 has become too hot, and I think it is best to replace it as well.

    Concerning the U4 etc, first clean it with, for example, Isopropyl Alcohol IPA 99.9% and a tooth brush.
    Remove it with a hot air gun, preferably using flush paste to slightly protect the weak print tracks during removal.
    Possibly (recommendation) protect the other/surrounding parts with kapton tape.

    Furthermore, it depends on the print trace damage that can be seen after removal, whether it is still repairable.
    But also depends on your knowledge and the right tools.
    And there is no guarantee that the time and investment will be successful, it always depends on possible more damage.
     
    Johnny B., Feb 6, 2023
    #9
    raza05 and DM900 like this.
  10. DM900

    DM900 Member

    Messages:
    42
    Likes Received:
    11
    Trophy Points:
    8
    Gender:
    Male
    Thanks u sir i will see what can I do first i need u4 chip
     
    DM900, Feb 6, 2023
    #10
  11. DM900

    DM900 Member

    Messages:
    42
    Likes Received:
    11
    Trophy Points:
    8
    Gender:
    Male
    DM900, Feb 6, 2023
    #11
  12. Johnny B.

    Johnny B. Technical Support Staff Member Moderator

    Messages:
    2,887
    Likes Received:
    1,547
    Trophy Points:
    113
    Gender:
    Male
    Location:
    Netherlands
    Home Page:
    Yes, but a long delivery time is stated for this product.
    It is better to buy it from aliexpress and or other seller.
     
    Johnny B., Feb 6, 2023
    #12
    DM900 likes this.
  13. DM900

    DM900 Member

    Messages:
    42
    Likes Received:
    11
    Trophy Points:
    8
    Gender:
    Male
    Thank
    Thanks sir AliExpress is banned here Google gives me only two choices
    My friend has
    LNBH23P
    LNBH21L my bad luck
     
    DM900, Feb 6, 2023
    #13
  14. Johnny B.

    Johnny B. Technical Support Staff Member Moderator

    Messages:
    2,887
    Likes Received:
    1,547
    Trophy Points:
    113
    Gender:
    Male
    Location:
    Netherlands
    Home Page:
    No, you need to search for the LNBH26L or NBH26L
    Maybe someone from another country could order it and to let it deliver to your address.
    And maybe this chip can also be present on older tuners/motherboards.
     
    Johnny B., Feb 6, 2023
    #14
    raza05 and DM900 like this.
  15. DM900

    DM900 Member

    Messages:
    42
    Likes Received:
    11
    Trophy Points:
    8
    Gender:
    Male

    Sir i have lot old tuners and motherboards but they are single tuner board also i have dm900 fatal error motherboard too which i discussed with u some year ago
    I don't have any foreigner friend
     
    DM900, Feb 6, 2023
    #15
  16. Johnny B.

    Johnny B. Technical Support Staff Member Moderator

    Messages:
    2,887
    Likes Received:
    1,547
    Trophy Points:
    113
    Gender:
    Male
    Location:
    Netherlands
    Home Page:
    Well, then I did my best for you.
    You know what needs to be replaced, and otherwise see if you can get a regular tuner.
     
    Johnny B., Feb 6, 2023
    #16
    DM900 likes this.
  17. DM900

    DM900 Member

    Messages:
    42
    Likes Received:
    11
    Trophy Points:
    8
    Gender:
    Male
    Only one circuit is demaged IMG_20230207_121010.jpg i attached two more pictures of old DVR box which has two tuner Measat 3 at 91.5 e-Reliance Digital TV-official HD DVR receiver DVR H 101 with the HDD-21.jpeg IMG_20230207_121010.jpg
     

    Attached Files:

    Last edited: Feb 7, 2023
    DM900, Feb 7, 2023
    #17
  18. Johnny B.

    Johnny B. Technical Support Staff Member Moderator

    Messages:
    2,887
    Likes Received:
    1,547
    Trophy Points:
    113
    Gender:
    Male
    Location:
    Netherlands
    Home Page:
    Indeed, now slightly better photos, and after cleaning it appears to be limited to the ic, and probably two print tracks.
    That can be fixed, but for that you must have the right tools, and of course a new IC.

    Good sharp images by the way , and it looks like it's been damaged by bugs.
     
    Johnny B., Feb 7, 2023
    #18
    DM900 likes this.
  19. DM900

    DM900 Member

    Messages:
    42
    Likes Received:
    11
    Trophy Points:
    8
    Gender:
    Male
    Thanks sir i also attached
    Old dual tuner box picture what about that
    And offcourse new is required i already placed order in Alibaba
     
    DM900, Feb 7, 2023
    #19
  20. Johnny B.

    Johnny B. Technical Support Staff Member Moderator

    Messages:
    2,887
    Likes Received:
    1,547
    Trophy Points:
    113
    Gender:
    Male
    Location:
    Netherlands
    Home Page:
    Sorry, That box is unknown to me..
     
    Johnny B., Feb 7, 2023
    #20
    DM900 likes this.
Page 1 of 2