I have two D8B's with proboxes, using them mainly as mixer, but recently one of them got broken and was thinking to turn it into a control surface with probox or maybe trying to repair it.
So, what happened - it was an electrical problem (my electrician forgot a loose cable in the general panel where all the AC wires are connected together in my house, and that wire was the one that got all the floor to powered up with AC (5x6mm section). One evening I was preparing to shoot a video, with some equipment plugged into AC (different plugs, different phases), and when I added a last light that I used for video, that light and 2 other lights that were identical blew up (with smoke and everything), and also an AC adapter for one of the cameras, and the normal LED bulbs from the ceiling were suddenly almost half dimmed...like there was an undervoltage situation - The D8B was plugged in also and it turned off - when tried to restart it, only the big red LED on the desk is lighting up, but none of the fans of the D8B processing unit (the box with the cpu) is moving anymore. Only a small hum from the big PSU can be heard, but nothing appears on the LCD of the desk nor on the VGA monitor that is connected. I guess everything that was sensible to undervoltage (due to the loose connection of one of the phases) blew up. I will put the multimeter to check if the big cable has voltage on the pins. I've checked the fuses, all are intact, also the condensators are not blown up or smth.
Will try to find a good pc service that might help me with measuring and finding the problem (I've called 3 of them in my area and they didn't seem to be interested in taking my request so far), but any hint will be greatly appreciated!
Regarding the fanless probox route, I've bought the 5, 12 and 15v sources from the Munkus' fanless guide:
1. Source Mean Well 12VDC, 8.5A, AC-DC, 102W, RS-100-12 - measured with the multimeter by default was 12.1v - should I set it to 12.0 v?
2. Source Mean Well 5V, 16A, 80W, RS-100-5 - measured with the multimeter by default was 5.1v - should I set it to 5.0 v?
3. Traco Power TXL 035-1515D on which I have a question: the gnd and V1 indicates 16.0 v (I've dialed in the rotary adjustment to get that) but on the gnd and V2 it indicates -15.3 v. When I set the rotary knob completely to the right the V2 is increasing to -15.4v max while the V1 reaches 17v or so. On the data sheet it is mentioned " Dual output version (TXL 035-xxxxD power supplies) do need a 10% minimum load on each output to ensure a proper and reliable regulation. " When asking the Traco Power technical department they asked what was the voltage under load - there was no load, only the multimeter pins on the GND + V1/V2 - also mentioned this: " Cross Regulation In a multiple output power supply or converter, the percent voltage change at one output caused by the load change on another output. Multiple output
power supplies often require balanced or minimum loads to achieve stated regulation specifications. " So, I will try to measure again with let's say a 5w ( since the max power is 36w, so it should be greater than 3.6w , according to the manual) tungsten 16v light bulb on V1 and also one on V2 circuit.
Wanted to ask if this is normal and can be used with -15.3v on V2 and 16.0v on V1 or is the unit is faulty and should be changed or If I should rather get 2x Mean Well 15v units, with 1A like this one: https://www.meanwell-web.com/en-gb/ac-d ... rs--15--15 Arjepsen (thank you!) just confirmed that he got the same problem with the +/_ source and that he ended up using two 15V supplies instead, where the negative one the first is tied to the positive on the other. - but I will check with him since putting to 15v sources in serial, as far as I understood, would give a 30 v source, just like when you put two 1.5v batteries in serial they sum up to 3v.
Can I just use two 15v Mean Well sources - one for +16v, one for -16v with V+ and V- inverted ?
Also, wanted to ask you if I would get a Mean Well one with 48v https://www.meanwell-web.com/en-gb/ac-d ... rs--15--48 could I have functional preamps with phantom power if connected to the right pins?
Thank you so much in advance for your answers!