David R. Posted December 7, 2000 Share Posted December 7, 2000 Hi knowledgeable people. I have a Roland SDE-3000, a wonderful older delay unit, that has started to make some noise. It is a static or crackling sound, which shows up in the led meter on the front of the unit. Any ideas what is wrong? The unit (when on) generates lots-o heat, which I think for this thing is normal but could have caused whatever is wrong to happen. My favorite repair shop recently decided to work only on a few brands (mainly ADAT) http://www.musicplayer.com/ubb/frown.gif and before I try a new place I want to have an educated guess as to the problem. This place is about as educated as it gets. Craig - what about a troubleshooting forum? Muchas Gracias, -David R. -David R. Link to comment Share on other sites More sharing options...
Anderton Posted December 7, 2000 Share Posted December 7, 2000 >>Craig - what about a troubleshooting forum?<< It is sooooooo hard to troubleshoot via long distance. Crackling could be something as simple as a connector that needs re-seating, to a cold solder joint, to an aging component. Intermittents are the hardest problems to track down, as it's hard to get things to misbehave on cue. If the crackling is constant, you'll have a better shot at getting it repaired expeditiously. Craig Anderton Educational site: http://www.craiganderton.org Music: http://www.youtube.com/thecraiganderton Twitter: http://www.twitter.com/craig_anderton Link to comment Share on other sites More sharing options...
David R. Posted December 8, 2000 Author Share Posted December 8, 2000 Yes Craig, I can see how that would be a hard thing to do. I guess the key is asking the right questions. I'm sure my problem is aging component, it happens consistantly after the unit has been on for 5 minutes (warms up). I've tried new cables and even no cables. The led meters still show the static like sound. Low, compaired to a full audio signal, but there. Thanks, have a swell weekend. -David R. Link to comment Share on other sites More sharing options...
Anderton Posted December 8, 2000 Share Posted December 8, 2000 >>I'm sure my problem is aging component, it happens consistantly after the unit has been on for 5 minutes (warms up). << That sounds like a thermal issue. You can get coolant in a spray can (not sure what it is...probably a freon substitute?) and this can be invaluable. Squirt a little on various parts and see if the crackling stops. I'd start with the semiconductors, then move on to components that are near the power supply, particularly capacitors and resistors. Best case is you'll find one of the semiconductors is the culprit, and it's socketed. So you can just waltz into the repair place and say "I think the ICZ-2324AVURP chip needs replacing." They pop one in the socket, leave the unit powered on for an hour, it doesn't screw up ... problem solved! Good luck. Craig Anderton Educational site: http://www.craiganderton.org Music: http://www.youtube.com/thecraiganderton Twitter: http://www.twitter.com/craig_anderton Link to comment Share on other sites More sharing options...
David R. Posted December 9, 2000 Author Share Posted December 9, 2000 Great! That is the stuff I was hoping for. I have a can of circuit cleaner that feels very cold when I accidently spray myself with it. My guess is it is the same stuff. I will try that, and maybe some cold beer (for lubrication - me of course). http://www.musicplayer.com/ubb/biggrin.gifhttp://www.musicplayer.com/ubb/biggrin.gif You da man. -David R. Link to comment Share on other sites More sharing options...
Anderton Posted December 9, 2000 Share Posted December 9, 2000 >>You da man.<< Please save any kudos until the thing actually works... You can also use "blue ice" like you put in the fridge, but be VERY careful about moisture contacting any of the pins. Ditto the coolant -- make sure you hit only the top of the chip. Craig Anderton Educational site: http://www.craiganderton.org Music: http://www.youtube.com/thecraiganderton Twitter: http://www.twitter.com/craig_anderton Link to comment Share on other sites More sharing options...
David R. Posted December 13, 2000 Author Share Posted December 13, 2000 Well Craig, I tried the coolant spray and was not able to find the problem. Into the shop it goes. So I am not sure what this does to your "You da man" status, if you were the "You da man ELECT" there might be a recount of the votes ordered, but only when there was not enough time to do the recount. That's democracy for you. Every vote counts, sometimes. O.K., you still get my vote. -David R. -David R. Link to comment Share on other sites More sharing options...
Anderton Posted December 14, 2000 Share Posted December 14, 2000 Thanks for the follow-up. When you find out the source of the problem, let us know ... maybe someone else will experience the same problem, and you will be providing valuable information. Craig Anderton Educational site: http://www.craiganderton.org Music: http://www.youtube.com/thecraiganderton Twitter: http://www.twitter.com/craig_anderton Link to comment Share on other sites More sharing options...
Recommended Posts
Archived
This topic is now archived and is closed to further replies.