VU+ Solo - Red led only ... no output at rs 232 port

Discussion in 'VuPlus Solo Hardware troubles and Repair support.' started by rtznfrtz, Nov 24, 2017.

  1. rtznfrtz

    rtznfrtz New Member

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    Hi
    how can i check if the cpu is working? i have no output to rs232 port and can't flash through rs232 (with adapter).
    Powersupply is OK, and i have all the usual voltages at the MB.
    Any procedure thats not requiring sophisticated equipment?
     
  2. Johnny B.

    Johnny B. Technical Support Staff Member Moderator

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    When I have this issue then I always check it with my cypress board and the Scl/Sda/Gnd connections to the cpu.
    When it's connect, then there is life to the cpu and it may be fixed by uploading the cfe file.
    If there is not be able to make a connection to the cpu, then I assume that there is a issue with the cpu, or at least some lower voltages to it.

    Also, when I could make a connection with the cypress interface, and only the serial port failed, then I mostly suspect that it could be caused due a defective rs232 ic.
    Often, by placing a new rs232 chip it just works.
     
  3. rtznfrtz

    rtznfrtz New Member

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    Thx - sound promising .... bought this some time ago
    Didn't search the forum .... ;-) but maybe you have a how to for wiring and programm to use on hand?
     

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  4. Johnny B.

    Johnny B. Technical Support Staff Member Moderator

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    Maybe this instructions how to, helps you on the way...
    Click on the picture for a full view..
    I2C-Steps-vu-plus-solo.jpg
     
  5. rtznfrtz

    rtznfrtz New Member

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    seems ok up to step 9 select flash
    its samsung k9f1g08u0c - but bc studio 3 only offers u0a .. i think this should not be an issue
    but ... "refresh" gives me: maker id returnded from the flash: (then either) 0 or e4 or 71 (and) does not match :-(
    Vcc is at 3.35V, both sides
     
    Last edited: Nov 24, 2017
  6. Johnny B.

    Johnny B. Technical Support Staff Member Moderator

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    Seems to me a nand flash chip issue or you have another type flash chip.
    Which flash chip has it?
     
  7. rtznfrtz

    rtznfrtz New Member

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    its samsung k9f1g08u0c - but bc studio 3 only offers u0a .....
    anything else i can measure .. ? vcc seems ok (3.35V)
     
  8. Johnny B.

    Johnny B. Technical Support Staff Member Moderator

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    Using k9f1g08u0a for the one you have, k9f1g08u0c should work because they have the same script settings.
    If you cant make a connection with it then the most logical thought is a defective nand flash chip which need to be replaced for a new one.

    But just to be sure I give the bbs xml zipped file which includes the,
    Samsung K9F1G08U0A.xml
    Samsung K9F1G08U0B.xml
    Samsung K9F1G08U0C.xml

    Place them in your c:\Program Files\Broadcom\Broadband Studio 3\Flashes\
    But still, I think not that it makes a difference.
     

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  9. rtznfrtz

    rtznfrtz New Member

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    Thanks a lot!
    Yes, chip might have a problem ....
    Desoldered and programmed with my univ. programmer, all ok at 2.7V (Type ...0B) but verify error at 3.5V mode (Type ...0A)
    i'll have to find a replacementchip an try again
     
  10. malpi

    malpi Member

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    Toshiba TC58NVG1S3ETA00
    Toshiba TC58NVG0S3ETA00

    the deco brings the first
    but I have a new one but it's the second
    Would it help me? I have dreamed the data and I think it only varies the memory capacity
     
  11. Johnny B.

    Johnny B. Technical Support Staff Member Moderator

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    At this moment I have no data sheets from the two but I think that they are not the same, the storage value seems to me different and will probably not work.
     
  12. malpi

    malpi Member

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    ok I confirm it does not work does not detect it
    I'm going to buy an equal
     
  13. malpi

    malpi Member

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    Hi, I've sold the new flash
    but there's no way that broadcom detects me
    the flash is well welded I have reviewed 10 times and watched with magnifying glass
    what could happen ? Thank you
     
  14. Johnny B.

    Johnny B. Technical Support Staff Member Moderator

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    Which nand flash chip you talking about?
    And are all the surrounding resistors present from the nand flash chip.
     
  15. malpi

    malpi Member

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    Toshiba TC58NVG0S3ETA00
    I put the same image is missing some resistance thanks
    https://ibb.co/dRcH6S
     
  16. Johnny B.

    Johnny B. Technical Support Staff Member Moderator

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    Yeah, should be fine, these should be work on the solo/duo.

    vusolo-k9f1g08uoc.jpg


    Samsung
    K9F1G08U0D 0xEC 0xF1 128 2048 64 128 KB x8
    Toshiba
    TC58NVG0S3E 0x98 0xD1 128 2048 64 128 KB x8

    Did you have measured the nand chip I/O pins, are they all eight pins in a same ohm range.
     
  17. malpi

    malpi Member

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    This is a lorinsun and the toshiba
     
  18. Johnny B.

    Johnny B. Technical Support Staff Member Moderator

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    Both nand chips can be used on all solo/duo boxes, also the mini versions.
    If the bbs cant connect to the flash chip, and you have chosen the correct flash script then it has another cause, could be some resistor issue arround the chip, or some bad I/O port connection to/from the cpu/nand chip.
    This can be measured by measuring the I/O port pins on the flash chip by ohms.
    All 8 ports should be in a same range.
    Also be sure that all the needed resistors are well soldered, I see some on your picture with doubts as from the pin 18/WE

    Pinouts,
    TC58NVG0S3ETA00-pinouts.jpg

    Pin names,
    TC58NVG0S3ETA00-pinnames.jpg
     
  19. malpi

    malpi Member

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    good what voltage is in the R343 at one end there are 3.3 and in the other ????
    Thank you
    I checked on the PZ02 connector
    the SDA pin only has 2.68v should have 3.30v
     
    Last edited: Feb 11, 2018
  20. Johnny B.

    Johnny B. Technical Support Staff Member Moderator

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    SDA, My logic says that it may to low, but i need to check it, however not earlier than tomorrow.
    As for the R343 (which is actually 334 because the one you give is not used) is a 4.7 kΩ resistor, just measure the resistor.
    For more resistor codes calculation, see here if you want to know a smd resistor value.