I have been trying to figure out why my AOUT_NG no longer works with my SEQ V4. To start I am running the newest version bootloader and SEQ OS. I have had this setup working with both my SEQ V4 and my old MB-6582 (sold). Here is my first question:
When I power on my ±12 Volt power supply hooked up to the AOUT_NG, the ground and cv pins on J5 are bridged… Normal? I’m assuming not, but I can’t for the life of me figure out why this is happening… I have removed the AOUT and PSU from their enclosure and disconnected the AOUT from the core32 so that the only connections are the 12v PSU and the AOUT… The PSU is outputting the proper power readings. Any ideas? I have two AOUT_NG’s and have confirmed the same behavior with both.
If this is normal I have some other problem, but I wanted to eliminate this as a possibility first.
with “bridged” you mean, that the CV outputs are at 0V (ground level) after power-on, right?
What I meant to say is that when I power on the 12volt supply to the AOUT_NG and use my multimeter to check conductivity between the GND pin and CV pins at J5 they are connected (bridged) … the multimeter “beeps” This doesn’t seem normal to me, but it happens to both of my AOUT_NG’s, one of which has never worked with the SEQ V4, but worked fine with my MB6582.
Did you already try the integrated AOUT test of MBSEQ V4?
Type “testaoutpin” in the MIOS Terminal to get more informations - this mode allows you to check the connections between core and AOUT_NG module.
I haven’t tried the test yet, but I will when I get off work later today.
And just to doublecheck: the CV Configuration menu shows AOUT_NG, right?
So, I stumbled across altitude’s thread involving his AOUT_NG and core32 issues that were resolved with shortening the cable connecting the core and AOUT… Since my cable is much longer than his original non-working cable I’m going to try a shorter cable later. The odd thing is that it worked fine with my MB6582, but maybe there is some sort of different between the 8-bit core and the 32-bit core…
What I meant to say is that when I power on the 12volt supply to the AOUT_NG and use my multimeter to check conductivity between the GND pin and CV pins at J5 they are connected (bridged) … the multimeter “beeps” This doesn’t seem normal to me, but it happens to both of my AOUT_NG’s, one of which has never worked with the SEQ V4, but worked fine with my MB6582.
Hi Alex,
Typical meters do not work this way, Attempting to measure continuity/resistance on a live circuit can damage the meter and the circuit under test.
Same for diode and transistor check settings - never on a live circuit!
Great advise Tim but it seems like you should also include information on how to measure a circuit with power on it. With power applied you almost always want to read voltage across a point, never use the meter on ohms. There may be exceptions but not many.