Forum Replies Created
-
Posts
-
Hey Brach! Good news, the synth seems to all be working properly. I reflashed the firmware to solve the notes sticking, I assume there was some corruption that occurred during the reflowing and volume pot shorting. Although everything is working, the synth seems overly quiet. I have to have the volume maxed out on the synth and still turn up my speaker system a considerable amount to really hear whats happening. Do you have any ideas on the cause of this and if there is anything that I can do to remedy the issue? Thanks in advance!
So good news. I finally got around to reflowing the joints. First I tried resistors, no luck, then the rest of the joints, still nothing. I tried again today and reflowed most joints, really paying attention to any that didnt look like a picture of a good solder joint. Still nothing. Feeling pretty defeated and frustrated, I went to short the volume pot again to make sure I didnt damage that circuit while reflowing, and I got a very transient, louder buzz, and then the keys started working. It seems like the pots arent very precise, I probably got them too hot or still dont have good joints on them. Sometimes the keyboard seems to hold a note. Not sure if that is a setting I accidentally turned on or some other thing I messed up lol. Its really cool that its at least making sound and responding to keys and pot adjustments now!
Edit: I also used a toothbrush and some isopropyl alcohol to clean all the excess flux on the solder side of the board!
Hey Brach, thanks for the quick reply on such an old thread. I am using lead free solder. When reflowing the resistors I did turn up the heat some more and did get better results. I also do have flux (in syringe form!) and used it to help reflow the resistors. I checked for continuity on the isp and didn’t find any pins bridged, but I did not test for unwanted grounding. When flashing, the pc did say it successfully connected and successfully flashed. When I get home tonight I will go ahead and remove excess solder and reflow all joints and update you. Thank you again for the guidance!
Hey Zeppelin Design team! I’m also having some trouble getting sound from my synth. It’s my first kit so it may be user error. I have tried reflowing some of the resistor joints, as they were the first and worst I had soldered (some have a bit too much solder now). I also may have slightly damaged the PCB at the ISP, maybe damaging the MISO, SCK, and RSTI side. Not sure if that can cause issue, if so, is there anything I can do about it? I purchased a USBtiny and flashed the software. I can bridge volume pot pins and get a slight buzz, but I didn’t test it for long. Im attaching some pictures, can you take a look?
Solder Side – https://ibb.co/WnL6bkF
Component Side – https://ibb.co/JcGVJkr
