Would swapping this diode have messed anything up?

[Mbira]

Hi folks,
In the brave new world of SMD soldering, I mistakenly reversed one of the diodes on this synth module I'm building.  It is right where the VEE voltage is coming in.  I believe the diodes are there to protect against reversing the connector. (ha!) Would this destroy anything else in the circuit?  I am having a difficult time troubleshooting this circuit.  I have replaced the diode that I had swapped. 

Attached is a screenshot of that area.  I reversed D4.  The full schematic for this can be seen here.  I'm asking because I fixed the diode, but the filter still sounds pretty crappy-the frequency knob is letting a lot of low end through, and I'm getting some other strange behavior.  http://mutable-instruments.net/static/schematics/Ripples-v40.pdf

EDIT: it looks like I am having an issue attaching a pic.  The diodes are at the bottom left of the attached schematic...

 

[benb]

Yes, D4 protects against the negative supply being reverse polarity. Having it reversed might damage the diode, but it could also damage the power supply. What's the output current capability of the power supply? I don't see anything ...

I was going to say I don't see anything else that could be hurt, but then I saw the V2164 (I've never used it or the older SSM2164, but I've been reading up on all these synth chips in the last year), and there's this info on it concerning the negative rail:

http://www.milton.arachsys.com/nj71/index.php?menu=2&submenu=2&subsubmenu=3

But it might not have ruined it, as the negative rail would have been at the diode drop voltage of -0.6V instead of just being disconnected, and that might have been enough not to damage things.

What are the Vcc and Vee now?  I presume they are at the correct voltages, I'm guessing either + and - 12V or + and - 15V.  A difference of five percent should be okay, but if one is substantially off, I'd fix that first.

Once everything else looks like it works, you might try replacing the V2164.

 

[Mbira]

Thanks so much for the reply!  Sorry for the delay in responding...It doesn't seem like I fried the VCA chip.  I also realized that I made another error-for the LM4040 (IC7 in the schematic), I had accidentally put a 2.5 v instead of a 5 v regulator.  I stupidly thought a lm4040 was just one thing (like a 7805, etc).  I didn't realize that there were different voltage.  Anyway, I swapped out the diode and the lm4040 and all seems to be working....but I don't have a factory made module to test these against.  yes-you are right, I'm running +-12V.  the PS seems to be ok-still working for all the other modules.  It's a pretty beefy Meanwell supply.

 

[benb]

Glad you got it going!

Looking at that LM4040 datasheet, it's huge for a "simple" device that only uses two terminals. In addition to the general description, every voltage has about a page for its specs.