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  1. #1

    Lumin U1 : really blown and not working

    Hello
    I have been using my lumin u1 for a year. Yesterday , I did the software upgrade to 10.3b
    Then the lumin worked
    Atferwards , the unit switched off and the PSU was quite hot
    I unplugged everything , and switched on again
    Music played for 90 to 120 seconds , and again the unit switched off by itself
    Who is the culprit ?
    The PSU or the Ugrade ?
    What to do now ?
    Cheers

  2. #2
    Senior Member
    Join Date
    Apr 2017
    Location
    Central FL
    Posts
    793

    Re: Lumin U1 : really blown and not working

    I believe I did my upgrade about a week ago (didn't really pay attention). I've played stuff on it and it hasn't shut off/
    Main System - Lumin U2, Modwright LS36.5 DM Preamp, VTV Purifi 1ET-7040SA with tube buffer, EMM Labs DAC 2X (ver. 2), Torus RM-20, Thiel CS 3.7s, 2 Rel S/812 subs
    Back-up 1 - Premium Audio mini Gan Amp, Oppo 103D, 2 Richard Gray cond, Selah SA-2s, Sumiko S5 sub, Teac UD-503 DAC, Carver (modded) C-9
    Back-up 2 - Onkyo TX-NR797, Panasonic DP-UB820, Vansevers cond, B&W P6s, PowerSoundAudio S1500 sub

  3. #3

    Re: Lumin U1 : really blown and not working

    Hello
    It seems that the PSU may be the culprit

    Will send a mail to wklie
    Is there a method to reboot to factory version ?

  4. #4
    Senior Member
    Join Date
    Jul 2014
    Location
    Hong Kong
    Posts
    3,081

    Re: Lumin U1 : really blown and not working

    Please send email to info@luminmusic.com

    I'm on vacation now and our team will be able to better followup this case.

    Assuming the firmware upgrade does the upgrade normally, I've tested the new firmware is stable. Two beta testers have also been using it for a month before it got a public release.

  5. #5

    Re: Lumin U1 : really blown and not working

    Thanks a lot
    I hope that Lumin will find a quick solution for me (psu exchange ?)
    Thanks again Peter , i have mailed Lumin

  6. #6
    Senior Member
    Join Date
    Apr 2017
    Location
    Central FL
    Posts
    793

    Re: Lumin U1 : really blown and not working

    I also just played my system for a good hour and a half and cranked it. The U1 power supply was cool. I don't use the volume control in the U1
    Main System - Lumin U2, Modwright LS36.5 DM Preamp, VTV Purifi 1ET-7040SA with tube buffer, EMM Labs DAC 2X (ver. 2), Torus RM-20, Thiel CS 3.7s, 2 Rel S/812 subs
    Back-up 1 - Premium Audio mini Gan Amp, Oppo 103D, 2 Richard Gray cond, Selah SA-2s, Sumiko S5 sub, Teac UD-503 DAC, Carver (modded) C-9
    Back-up 2 - Onkyo TX-NR797, Panasonic DP-UB820, Vansevers cond, B&W P6s, PowerSoundAudio S1500 sub

  7. #7

    Re: Lumin U1 : really blown and not working

    Hello
    I guess that this should be a power supply problem .. i am waiting for Lumin to answer , to know how a repair / test / exchange could be done . Voltage regulators can be quite hot i think ..
    Hard to be without music ..
    cherrs

  8. #8
    Senior Member
    Join Date
    Apr 2017
    Location
    Central FL
    Posts
    793

    Re: Lumin U1 : really blown and not working

    Quote Originally Posted by Zaheer View Post
    Hello
    I guess that this should be a power supply problem .. i am waiting for Lumin to answer , to know how a repair / test / exchange could be done . Voltage regulators can be quite hot i think ..
    Hard to be without music ..
    cherrs

    I feel for you. That's one of the reasons I generally don't sell as much and just rotate stuff to a secondary system. In the past many moons ago, I've had amps in for repair and what I had as a spare amp wouldn't drive my main speakers to reasonable levels so I was left with background music capability only.
    Main System - Lumin U2, Modwright LS36.5 DM Preamp, VTV Purifi 1ET-7040SA with tube buffer, EMM Labs DAC 2X (ver. 2), Torus RM-20, Thiel CS 3.7s, 2 Rel S/812 subs
    Back-up 1 - Premium Audio mini Gan Amp, Oppo 103D, 2 Richard Gray cond, Selah SA-2s, Sumiko S5 sub, Teac UD-503 DAC, Carver (modded) C-9
    Back-up 2 - Onkyo TX-NR797, Panasonic DP-UB820, Vansevers cond, B&W P6s, PowerSoundAudio S1500 sub

  9. #9

    Re: Lumin U1 : really blown and not working

    Hello
    After some days , Lumin asked me to test the PSU , with voltage on the PINS
    I'll do so tomorrow
    BUT , I have no idea which pin is number 1 -- and which one is NUMBER 8
    Well , I hope that I'll find a way to get it repaired or exchanged
    Cheers

  10. #10
    Senior Member
    Join Date
    Aug 2016
    Location
    Denmark
    Posts
    639

    Re: Lumin U1 : really blown and not working

    Hi , i just did a google search , and i hope my link works
    8 pin din numbering

    Then you will see how the numbering is.
    Hope it helps you.
    Flemming

    Lumin X1
    Rotel Michi S5
    Focus Audio FS788

    Inter connect : Nordost Tyr 2 ( 2 Meter )
    LS cable : Yter
    Power Cables : Nordost Frey 2 ( 2 Meter )
    Nordost QB8
    Fibercable for feeding the Lumin X1
    Rack : Finite Elemente Pagode

  11. #11

    Re: Lumin U1 : really blown and not working

    thanks

  12. #12
    Senior Member
    Join Date
    Aug 2016
    Location
    Denmark
    Posts
    639

    Re: Lumin U1 : really blown and not working

    your welcome and only glad if i can help. Hope you get the problem solved.
    Flemming

    Lumin X1
    Rotel Michi S5
    Focus Audio FS788

    Inter connect : Nordost Tyr 2 ( 2 Meter )
    LS cable : Yter
    Power Cables : Nordost Frey 2 ( 2 Meter )
    Nordost QB8
    Fibercable for feeding the Lumin X1
    Rack : Finite Elemente Pagode

  13. #13

    Re: Lumin U1 : really blown and not working

    Hello
    I did that search , and simply forgot to see the images ..
    Tomorrow upon returning home , I'll chevk that
    Lumin is not so well distributed in France , and I bought the unit in HK
    So i think that the local distributor will not take the guarantee
    The other route is to send the PSU to HK , but I'm waiting for a reply from Lumin
    Then , I can try to buy a PSU from Kenneth LAU , but .. expensive
    So right now , It's huge frustration , and impatience

    Many many thanks for your help
    I hope to get news from Lumin soon

    Cheers

  14. #14

    Re: Lumin U1 : really blown and not working

    Hello
    Some updates regarding the problem
    1. Wklie has been very kind and helpful
    2. The PSU is not working , and I'll send the unit , which is still in guarantee

    I have been wondering about
    1. Kenneth Lau PSU as replacement
    2. The new Lumin PSU

    IS this new PSU compatible with the U1 ?

    Cheers

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Lumin U1 : really blown and not working

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