DDX3216 repair

[obiwanjacobi]

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...

[obiwanjacobi]

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...

[obiwanjacobi]

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

[S2udio]

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 ?.

[obiwanjacobi]

Awesome! thanx!

[efxmla]

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!

[Jazz P Bass]

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.

[efxmla]

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!

[obiwanjacobi]

Is it normal around here to hijack threads??

[efxmla]

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!

[obiwanjacobi]

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

[efxmla]

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!

[obiwanjacobi]

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.

[paleeman]

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.

[obiwanjacobi]

See post #19.