MB6582, AOUT_NG and -12VDC

[jjonas]

Hi,

 

I've been thinking about building an AOUT_NG and a Seppoman filter, and have a few questions before I start.

 

I'm using a Meanwell RPT-60B as the PSU for MB6582, it provides all the necessary voltages (at the moment I'm bringing in 5VDC-GND and +12VDC-GND), though when I built the MB6582 I didn't bring in the -12VDC as I didn't need it then (also the C64 PSU secondary side cable that I used had only four wires in it).

 

However, now I think I could replace the C64 cable with a 5-wire cable and a 7-pin DIN plug to bring the -12VDC into MB6582 as well in one of the extra wires, and then feed the AOUT_NG and the filter module via the DB25 connector in the back of MB6582, instead of another external PSU.

 

Assuming this is a sound plan, the question – based on Wilba's base PCB picture – is: of the seven poles in MB6582's power socket (J1), is it so that only five are connected to something (five and not four, because the incoming 5VDC seems to be connected to two poles), and the remaining two are not connected to anything else than the solder pads, i.e. it's safe to bring in -12VDC to either of them and just take a wire from there to the DB25..?

[ilmenator]

Based on the drawing you link to I would say that this is the case!