nx1101

Here's as hi-def a shot I can get of the solder joints: http://i.imgur.com/Eac7L.jpg I tested many of the joints with a multimeter -- not sure if my technique is correct -- and didn't find anything. Does anything jump out? Thanks!

Yes, when I removed all the banksticks, Rhodes Piano patch was loaded. No output though. Good point. When I did get audio output, the sound itself was fine, so I think the OPL3 and amp circuit is intact. I'm inexperienced in debugging circuits but I'll give this a shot. I did try this -- same results. Thank you so much for the help.

Hi Sauraen. I just gave that a try but the unit produced no audio output at all this time around. After reinserting the banksticks it still doesn't produce any output even if I reinstall the firmware! :wacko: Just to confirm I did this correctly, I removed the 5 components in the bottom left of this photo: http://i.imgur.com/qI91I.jpg and then inserted them one-by-one starting from IC5 up to IC9.

Thanks for the reply, Sauraen. Yes, the first patch I use works mostly correctly, only a few skipped + incorrect notes. As soon as I switch banks things start to degrade quickly. Letting it sit powered off for a while does not seem to help. The same Y-cables and power supply work fine on a sammichSID so I think those are ok. I also tried using another power supply and got the same results. Is there any sort of diagnostic software I can run? Thanks! EDIT: See the EDIT in the original post. (Reading/writing patches isn't fully working as I'd thought.)

I have a strange issue with a sammichFM I recently acquired (I didn't build it). After a clean firmware installation, everything works as expected (as far as I can tell). As soon as I change a patch however, incoming MIDI notes start getting skipped by the synthesizer. The LED on the front panel lights up, but no audio output is produced. This continues to get worse and worse until only 1 out of every 10 or so notes is played, and then it finally stops producing audio altogether. Reading/writing patches still works, all of the menu navigation works, and LEDs light up on incoming MIDI, but no output. Powering on/off doesn't help. Resetting the firmware appears to help, though this may be coincidental. I'll add 1 more bit of info. Last night I reached the same zero-output state with only 1 audio cable plugged in (OUT1/2). Plugging in another cable (OUT3/4) appeared to fix the issue temporarily, but it eventually went back to producing no audio. Strange! I have a feeling it may have to do with cables I'm using. For each OUT socket, I'm using an insert cable (Y-cable, stereo 1/4" TRS to 2 mono 1/4" TS). Is that the proper cabling? Thanks for any help. EDIT: It appears reading/writing of patches is not working fully. Some recalled values are garbled.