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DDX3216 repair

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  • #16
    Seems I have lost my audience

    Anyway, I have replaced the 32.768kHz crystal and checked the frequency (of the new crystal) on the scope and that looks good.
    However, the mixer doesn't start up yet.

    I have checked the activity on the flash memory chips (IC15 pin 1-14) on the CPU01 board and can see activity. However I see somewhat regular patterns so the program may be looping or restarting - not sure.

    Not sure how to proceed, will read other threads some more...

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    • #17
      For the record...

      I have disconnected all ribbon cables from the CPU01 board and only connected the LCD and power cables.
      I removed the +5v connector pin and put my multi meter in series on Amperes and measured 157 mA. To me, this seems a plausible value.
      The schematic I've got contains a page that lists current for each power connector pin and has 190mA written for the +5V for this connector.

      To me this does not look like a shorted decoupling cap on the rail.

      I may also do the 3.3V rail...

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      • #18
        Does anybody have the binary (hex) dump for the flash chips (IC15-19)??

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        • #19
          Yup will see if i can upload them....Watch this space

          Attached

          PM me for the password

          Taken from a working DDX ,OS 1.12, May have 2 adats in it , so may report IO errors on first boot ,or may not ?.
          Attached Files
          Last edited by S2udio; 04-09-2015, 05:14 PM.

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          • #20
            Awesome! thanx!

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            • #21
              Hi Guys! I am really running out of luck with my Behringer DDX3216 LCD. Does anybody have suggestions for a replacement unit? I purchased a similar type LCD from Crystal Fontz America but it has 8 data I/O's and the AMD sc300-33kc has 4. Unfortunately I cant make it work and no reply from Behringer because they already stopped production of these units. Any ideas? Very much appreciated for any suggestions. Thanks!

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              • #22
                You have me confused.

                The AMD is a microcontroller, not an LCD.

                As far as I can see, the data pins for the LCD are the same.
                D0-D15.
                Attached Files

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                • #23
                  My apologies for the confusion. The AMD (ELANS SC300-33KC) is the one driving the system but provides the following, LCDD0 to LCDD3, FRM, M, CP1, and CP2. The one I got has D0 to D7 and some more pins which confuses me. It has 4 data pins more. I am not really an expert on this, sorry!

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                  • #24
                    Is it normal around here to hijack threads??

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                    • #25
                      Hi obiwanjacobi! Sorry If I unintentionally went in to this thread. The truth is, I am not used to this conversation and I am not very knowledegable in the thread business. My apologies to you and the rest. I thought I can just shout for help! Thanks!

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                      • #26
                        No Problem. Typically it is more useful to start your own thread for each problem. In there you can refer to other threads that you have read or discuss a similar problem. If the problem is very close to what an existing thread discusses, it is usually ok to pitch in.

                        No hard feelings
                        Marc

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                        • #27
                          Very much appreciated! Only, since it was my second time to join in, I really don.t know where to start. I saw your problems re DDx and I thought since it is related, I went in. Well I don't take anything against anyone anyway. And it's my mistake so I am very sorry about it. But maybe I can also gain friends later on. Many thanks and pardon me guys! And of course no hard feelings!

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                          • #28
                            Right, So my programmer arrived and I read all memory chips (IC15-19) and saved their contents on my PC and programmed IC15-18 with the binary images i got from @S2udio - IC19 was exactly the same the others weren't.

                            Reinserted the chips and when I boot, instead of the logo I now get the Invalid Program error message.

                            Which raises the question:

                            Did I read in the bin files correctly?

                            I 'think' my programmer software simply read in the file as separate bytes, but it also has several other options (all having to do with little/big indian of words and longs etc)...?

                            I will try to reflash the firmware but hold no high hopes for that procedure...

                            Any suggestions are welcome.

                            BTW: I finished recapping the PSU and it does not make noise anymore and seems to work fine.

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                            • #29
                              Hi obiwanjacobi.
                              If I may ask, how did you obtain the contents for the ICs 15 - 18 (AT29C040) ? Even if you have a working unit, you cannot read the content, because they're SW protected. And as usual, Behringer was not willing to provide them when asked to.
                              Last edited by paleeman; 05-03-2015, 04:03 PM.

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                              • #30
                                See post #19.

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