Help about DM500 plus

Discussion in 'Hardware troubles and Repair support.' started by jeet999, Sep 13, 2020.

  1. jeet999

    jeet999 New Member

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    Dear admin & all dm expert my dm500+
    Motherbord (sim A2P) i don't know about rs232 connection this 10 pin connector please tell me anyone what is 3 pin used for Rs 232
    For serial port
    Thankx 15999776610728478580983787172269.jpg 15999776610728478580983787172269.jpg 15999776610728478580983787172269.jpg 15999776977541124073519281901692.jpg 15999776977541124073519281901692.jpg
     
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  2. Johnny B.

    Johnny B. Technical Support Staff Member Moderator

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    Although the board is a bit newer than the older, the rs232 circuit seems to me the same, as also the same rs232 Sipex chip.
    And so, it should have the same connections as the older dm500C/S boxes, as you can see on this schematic.

    As for the DB9 connector, pin1 to 5 are connected to the same numbers as the motherboard connector, 6 to 9 are starting from pin 10..

    dm500-u60-rs232-jpg.jpg
     
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  3. toysoft

    toysoft Well-Known Member Staff Member

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    Hello,

    If possible, and if you have a smartcard reader on your PC, it would be great for the Team knowledge if you could run one of our software to read/communicate with the sim A2P on your DM500+, so we know how it works.

    Thank you in advance !

    TS

     
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  4. jeet999

    jeet999 New Member

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    Yes i have smartcard reader
    Smartmouse Phoenix smartCard what i can do
     
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  5. toysoft

    toysoft Well-Known Member Staff Member

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    Send me an email/PM, on http://www.ourdreambox.com/ forum,

    TS

     
  6. jeet999

    jeet999 New Member

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    After placing a new a2p sim motherboard not alive voltage measurement J11 and j14 only 3 LED D6 D7 glowing after connecting LAN port wire D5 is blinking panel is the red LED glowing
    Not connecting in dream up or Japhar flasher v1.1 help me johnny sir
    J 11 voltege
    Pin volt
    1 3.31
    2 36~180 mv
    3 3.31
    4 same as pin 2
    5 100mv
    6 3.31
    7 3.31
    8 100mv
    9 3.31
    10 100mv
    11 3.31
    12 100mv
    13 100mv
    14 100mv
    15 100mv
    16 0v


    J 15 voltege

    Pin volt
    1 3.32
    2 1.36
    3 262
    4 2.57
    5 .75
    6 2.67
    7 .75
    8 2.53
    9 .70
    10 0v 16008424038039146512256684437720.jpg 16008424038039146512256684437720.jpg 16008424038039146512256684437720.jpg 16008424790392078300091788755300.jpg
     
  7. Johnny B.

    Johnny B. Technical Support Staff Member Moderator

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    Since I do not have these dm500+ boards, I'm not be able to check these.
    The older board which I own are totally different with most voltage regulators than these.

    But since I only see the 3.3v, and not a voltage as 5v or even 12v, then it may be handy to measure these marked spots,

    dm500-plus-voltagespots.jpg
     
  8. jeet999

    jeet999 New Member

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    Dear sir please check
    Voltage measurement
    L39 3.3v both side 4R1
    L38 5.1 v both side 5R3
    D25 negative side 10.10v positive side 16.95v
    F5 5.1 v both side
    dm500-plus-voltagespots (1).jpg
     
  9. Johnny B.

    Johnny B. Technical Support Staff Member Moderator

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    All the main voltages seems to be present, thus normally when it's in this error state,
    No network connection
    Not be able to flash the box
    No access to the board with a rs232 connection.

    So it looks as if the box has been bricked.
    Then what's remain is to preform a Jtag job but..
    The last I had done it was when I were as least ten years younger and with the older dm500S/C receivers.
    So, I'm pretty rusty to dig all of it again up, as also I have some doubts if the jtag process is the same for the dm500 plus.
     
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  10. toysoft

    toysoft Well-Known Member Staff Member

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    This box never had a "clone" version, and this is an original box,

    So I would definitely try to use the DreamUp/JapharFlasher and with a REAL RS232 cable and PC with REAL RS232, connect a cable to the box to flash it with a working DM500+ image,

    Try the Gemini : gemini-470-dm500plus-200912112351
    MEGA :
    Code:
    https://mega.nz/#!51pmwJaY!JytwI0B3e377GKTIaApun1SAahwcArqBosfzhEj76cw
    Flash it and please keep connected the RS232 with a Putty software on the back to see the log of the box when it boots. Perhaps it will work in Serial mode at 9600 bps, or 115200bps, try the various speeds (should be same as on the DM500s boxes, Johnny could give some tips about logging the serial port for logs).

    TS
     
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