otto1

Using desoldering wick I have desoldered the 5v connections, still have the short. I'm not sure why desoldering without actually removing the component would work though. I mean if I am just desolderign the the component can still touch the copper until I actually remove it, right? It's really difficult for me to tell if there is a fault in the board. I mean there are areas where the red stuff is slightly off-set from the pads but it will have a black circle or square around the pad but still I could see how one could easily overlap in the offset areas... Is my next step to actually remove the components one at a time? I can't see narrowing it down until I do that but I want to make sure I'm on the right track.... ugh...

I have made 2 cuts per your instructions. The first cut showed that the short is in the upper section of the PCB. So I made the second cut to seperate the sid area. when I test sid pin 25 (5v) to another 25 there is polarity as expected and there is no polarity at ground, yay. However, when I test pin 14 (gnd) it still shows polarity to ground as expected but it also shows polarity to 5V at J3 or J4, however there is no polarity between pins 14 and 25. So should I just ignore that and focus on the section above the first cut where J2,J3,j4 etc are?

Thanks for your help and patience Wilba! What is the best way to actually cut the tracks? Just cut into the board with a knife or???

I'm getting myself confused here. I've looked for any areas where solder might be touching multiple times and with a magnifying glass and I see none. My friend is also building the kit, were trying to do this together. His tests 5v fine at J3 with power supply on. So I used his board to A&B mine with to see what the differences are. With the power switch off, just checking continuity (with an analog multimeter "OHM X1K" setting, touch the tips together the pin goes to the right...). What surprised me was this his board does show coninuity in the same places as mine between 5v and ground, however the needle slowly drops in these areas on his board while the needle stays steady to the right on mine. So, it's like mine has constant continuity between 5v and ground and his shows initial continuity then drops off. Could that indicate something else going on or is that normal? If this still indicates a soldering short, I'm at a bit of a loss as to where to look. I realize cutting the 5V is an option but that still leaves me looking at half a board with no obvious soldering "blobs"...

Yes it appears that everything connected to pad 2 is also connected to ground. Up to pad one none of that is shorted to ground. It's not obvious to me where I have shorted. Any hints on how I might track down the short? Should i assume the short to ground is at either J2, J3 or J4?

Thanks for your help Wilba. OK, starting from the power supply jack, testing each pad, I get 5V up until power switch pad 2. This is with the power switch flipped "off". If I flip it "on" then I don't get 5V anywhere, which seems weird...

I didn't forget the bridge. I even resoldered the bridge just in case it was a cold solder joint. :( Other suggeestions?

OK so I carefully tested before plugging in the powersupply. I know the power supply is working fine but I am not getting 5V @ J3. I am getting a connection between 5V and all the IC sockets. So I guess I need to backtrack and find where I've lost a connection between the power supply plug in and J3. Any help would be appreciated. oh, this is rev 2 PCB if that matters. Thanks!

bleeptronic 5000 Could this be modded for use as a midi sequencer device???

Ahh, sorry I missed the multi engine thing. and the volume? I read the users manual on ucapps, searched the forum and found lots of people with low volume issues but I'm starting to think there is no volume control on these, correct me if I'm wrong?

First, just scrolling through and playing patches I've noticed my LED's aren't doing anything. Do I have to be in a special mode or is it an electronic issue? Second, I can't find anything in the manual about changing the volume. Through headphones this is pretty F-ing loud but I can't find anywhere to change it.

I figured it out last night, I'm a silly bastard. When I went to delete this post my internet went south. No help needed at this point. On to installing the bank sticks!

So, everything was looking great. All the voltages were correct, midi out did what it should in Mios studio. However, midi-in is not receiving. I resoldered the DIN and that didn't help. Any tips on what to try next???

I'm looking for some or a chip(s) as well if anyone has any for a fair price.