yes, i checked the pcb layout and youre correct, but the layout we received is a bit different then the one on the wiki. I can’t imagine that has changed. But that still doesn’t explain why the sound from my sid1 is coming out this socket. Hmm strange. If i connect to the other socket i don’t hear anything. :-\
It looks like you are not using switched stereo sockets.
The PCB was changed in this section but only to add tracks to join up the stereo sockets (via resistors) into a passive mixer.
i.e. with switched stereo sockets installed, it will mix the output of those sockets without plugs in them.
How that works is when a plug is in a socket, the signals go from the pins on the left (looking at the PCB) to the plug, via the contacts above the plug. When the plug is out of the socket, the contacts above the plug touch the contacts connected to the pins on the right (looking at the PCB).
So… if you’re not using switched stereo sockets, or the pins are different to what the PCB expects, some wierdness might happen… like what you’re experiencing.
I don’t think you’re using stereo sockets from SmashTV, so please describe what you are using.
Do they have six pins on the bottom?
Do the contacts that touch the plug at the top connect to the left or right side pins (looking at the socket with hole at 12 o’clock)? They look like they connect to the right side, which is where it connects up to the mixer.
I can give you a workaround/fix after you confirm the part is not what the PCB expects… basically you can take out the passive mixer resistors and then just bridge across the pins on the base.
OK they are definitely different, the contacts with the plug go out to the opposite side to the “right” sockets.
The “quick fix”:
Take out the two 10K resistors just below each socket. These are used to mix each channel with the others when there is no plug in the socket. It’s no great loss.
Carefully solder some insulated wire between the three pairs of pins, i.e. the wires will be bridging between the left and right sides of the socket. Do this for all four sockets.
Now you should have sound coming out the right socket!
Is any information on the right audio socket available? Datasheet? Should the they mount flat against the pcb to fit the back panel och should they level 5mm above as the solder lug style audio sockets do?
After I built the prototype, SmashTV found the right socket from Neutrik and used these in kits and I have been using them ever since without thinking they weren’t a standard, easily available part.
Is any information on the right audio socket available? Datasheet? Should the they mount flat against the pcb to fit the back panel och should they level 5mm above as the solder lug style audio sockets do?
They should mount flat to the PCB, and the flat part where the threaded part starts should also align with the PCB edge, since the PCB edge should touch the back panel (ideally, but if there’s a tiny gap between the PCB and the back panel then it’s not that bad).