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18th June 2009
| #1 |
| Gear Head  Joined: Dec 2006 Location: Trondheim, Norway
Posts: 39
Thread Starter | API 2500 tech problem
Hi, tech question : All of a sudden the left side of my API 2500 is not compressing at all. With L/R link set to IND only the right channel is doing the gain reduction. Anyone seen this before, any known issues with the 2500 and left side compression not working? I have dropped API an email but if someone in here has an answer please share.. Thanks
__________________ Morten Stendahl Redroom Studio |
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18th June 2009
| #2 |
| Mastering Engineer  Joined: Jul 2007 Location: Eindhoven, The Netherlands
Posts: 411
Verified Member |
__________________ Paul Matthijs Lombert | The Mastering Factory, Eindhoven, NL |
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18th June 2009
| #3 | |
| Mastering Joined: Mar 2006
Posts: 3,099
| Quote:
Sounds like a bad connection somewhere in the feed to the left channel control voltage for the VCA. It's a control voltage problem because the VCA is evidently passing signal. When IND is turned off are both sides gain reducing? If so, then clearly the problem is in the IND switch! API is going to ask you to return the unit for repair. If you can isolate it to the switch you can confirm that it is the switch and not some easily fixed cold solder joint, yourself by measuring DC control voltages. BK
__________________ Bob Katz DIGITAL DOMAIN http://www.digido.com "There are two kinds of fools. One says-this is old and therefore good. The other says-this is new and therefore better." No trees were killed in the sending of this message. However a large number of electrons were terribly inconvenienced. | |
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18th June 2009
| #4 |
| Gear Head Joined: Dec 2006 Location: Trondheim, Norway
Posts: 39
Thread Starter |
Similar but not the same My unit passes audio in both channels, just not doing any gain reduction on the left side. I´ll have to track down the Norwegian dealer and see if the warranty from Alto Music is good here. Or I could go digging around inside the unit and throw a few things around to see if that helps although that is not the best solution.. |
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17th July 2009
| #5 |
| Lives for gear  Joined: Mar 2007 Location: Williamsburg, NYC
Posts: 1,494
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My 2500 had a few db difference in GR between channels. I sent it in for diagnostic and they found a few problems. They seemed a little bit puzzled about it.
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17th July 2009
| #6 |
| Lives for gear Joined: May 2003 Location: Montclair, NJ
Posts: 613
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It could be a bad op amp. I've had multiple op amps replaced in my 525's. Ray, at API tech repair is a great guy and will certainly help you get it going asap. |
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17th July 2009
| #7 |
| Gear addict  Joined: Nov 2007 Location: Missouri
Posts: 374
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It seems like alot of issues are being reported on this unit on this forum lately. Makes me nervous as I just bought one!
__________________ Justin Madden Follow me on twitter: @jmadd5000 Check out my music: http://itunes.apple.com/us/album/gar...-2/id433197725 |
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