VU Duo No USB programming No tuner signal

Discussion in 'VuPlus Duo Hardware troubles and Repair support.' started by arecki09, Mar 6, 2019.

  1. arecki09

    arecki09 New Member

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    Hi
    Today i try repair VU+ Duo with hard history. On begin light only red light on front panel. On + legs C812 and 220uF near Lan connector, PCB has damage vias. In 220uF i connect legs to SMD fuse. I replace few capacitors (this blue Jamicon on picture i install today). After that box starting, OpenPLi loading but VU no see signal from antenna. Check polarity V and H and still the same. Voltage on F connector has 12,97V. When i change TV program on box voltage jump up to aprox. 16v on half second and back to 12,97v.
    Next problem, i can't update image via USB. I try few diffrent flash drive and VU looks like no see USB flash. 5V on USB i check and is present. Diffrent VU+ see this USB Drive.
    I don't know how i check next.
    Voltage from AOZ look OK
    Please help
     

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  2. Johnny B.

    Johnny B. Technical Support Staff Member Moderator

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    Usb,
    To known if it not works due a voltage issue you could use a usb stick with a led on it, or connect an external usb hub with a own power source.
    Other option to see if the box try's to read the usb ports, is to connect the box with a serial cable and to use a terminal tool as putty or other serial program.

    If, the serial port, and usb, and tuners not works, then I think it could be caused due the serial chip or some voltage issue thinking related to the 5v.