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  1. #1
    Junior Member
    Join Date
    May 2021
    Posts
    3

    Burned touch with 12V PSU, need infos

    Hi everybody!
    I was following this forum until i did A BIG MISTAKE, SADLY, so i decided to write this thread.
    Touch (at least mine) must be powered with 5V, but i was doing a lot of thing and i used a 12V PSU....:-(
    So some smell of burned components went out from my (lovely) Touch.
    I'm not a noob in electronics, i have a laboratory and many tools (microscope, oscilloscope and so on).
    But... Sadly the service manual or anything about electronics is impossible to find.
    So i opened it and i found a component that is burnt.
    It is marked 0B2X, i think it is a VDO, but many models with different voltage have this SMD code.
    So i would need some voltage measurements into these pads:
    Name:  Forum 2.jpg
Views: 244
Size:  210.7 KB
    Here i removed the component 0B2X. I need voltages in the power management chip 2041B DIL also.
    Name:  Forum 1.jpg
Views: 218
Size:  232.2 KB
    Here there are other VDO (i think), i would need their voltage on every pin. The marked resistor becomes very hot, but i don't think it is broken.
    Of course every voltage must be taken when powered ON.

    I know that it is quite annoying opening your Touch, but it could be a very precious help for me.
    No music now...:-(

    Any other help would be very appreciated!

    GM

  2. #2
    Senior Member
    Join Date
    May 2017
    Posts
    784
    Perhaps the German Joe can help you out on this. He has a lot of experience with SB repairs in general.
    SqueezeBoxes: 1x Transporter (Living room) 1x SB2 (shed), 1x Radio (Kitchen), 1x Boom (Dining room), 1x piCorePlayer (jacuzzi), 1x piCorePlayer (Garden) 1x OSMC + Squeezelite (Movie room), 1x Touch (Study 2), few spare unit's (SB2, SB3, Boom, Touch)
    Server: LMS on Pi3B+ 8.1.2 on PcP 7.0.1
    Network: Draytek, Netgear Smart Switch 24p, Ubiquiti PoE, 3x Ubiquity

  3. #3
    Senior Member
    Join Date
    Jan 2010
    Location
    Hertfordshire
    Posts
    7,059
    Quote Originally Posted by Gmnet View Post
    Hi everybody!
    I was following this forum until i did A BIG MISTAKE, SADLY, so i decided to write this thread.
    Touch (at least mine) must be powered with 5V, but i was doing a lot of thing and i used a 12V PSU....:-(
    So some smell of burned components went out from my (lovely) Touch.
    I'm not a noob in electronics, i have a laboratory and many tools (microscope, oscilloscope and so on).
    But... Sadly the service manual or anything about electronics is impossible to find.
    So i opened it and i found a component that is burnt.
    It is marked 0B2X, i think it is a VDO, but many models with different voltage have this SMD code.
    So i would need some voltage measurements into these pads:
    Name:  Forum 2.jpg
Views: 244
Size:  210.7 KB
    Here i removed the component 0B2X. I need voltages in the power management chip 2041B DIL also.
    Name:  Forum 1.jpg
Views: 218
Size:  232.2 KB
    Here there are other VDO (i think), i would need their voltage on every pin. The marked resistor becomes very hot, but i don't think it is broken.
    Of course every voltage must be taken when powered ON.

    I know that it is quite annoying opening your Touch, but it could be a very precious help for me.
    No music now...:-(

    Any other help would be very appreciated!

    GM
    What is a VDO?

    Edit Maybe you mean LDO voltage regulator

    Sent from my Pixel 3a using Tapatalk
    Last edited by slartibartfast; 2021-05-09 at 02:26.

  4. #4
    Junior Member
    Join Date
    May 2021
    Posts
    3
    Yes LDO! Mistyping... Sorry!

    Quote Originally Posted by slartibartfast View Post
    What is a VDO?

    Edit Maybe you mean LDO voltage regulator

    Sent from my Pixel 3a using Tapatalk

  5. #5
    Junior Member
    Join Date
    May 2021
    Posts
    3
    Hi!

    Sorry, I can't find "German Joe" as user, is this nickname exact?

    Quote Originally Posted by edwin2006 View Post
    Perhaps the German Joe can help you out on this. He has a lot of experience with SB repairs in general.

  6. #6
    Senior Member
    Join Date
    Jan 2010
    Location
    Hertfordshire
    Posts
    7,059
    Quote Originally Posted by Gmnet View Post
    Hi!

    Sorry, I can't find "German Joe" as user, is this nickname exact?
    JoeMuc2009

    Sent from my Pixel 3a using Tapatalk

  7. #7
    Senior Member JoeMuc2009's Avatar
    Join Date
    Jan 2009
    Location
    Muenster, Germany
    Posts
    193
    thanks, I'm on it


    PN me if your Boom / Classic / Transporter display has issues!

    Blog: https://www.blogger.com/blogger.g?ri...50753#allposts

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