Originally Posted by d_r_i_x
I'm a quite recent zedr16 owner myself. It's my first outboard mixer, and thanks to this thread and others, i'm really happy having bought it.
Unfortunately, yesterday after having pressed the 48v knob on channel 6. The whole gain part of that same channel went bust. It now makes very loud clicks and pops when i press it. Sound isn't getting in the channel, or very faintly comes out when the gain is at the minimum, and the fader pushed to the max... Also sometimes, when pressed slightly sideways, the sounds goes back through and faints back down with time.
The EQ works fine however, as i tried it by sending a digital audio feed from my DAW. So it seems only the gain stage is having an issue.
Seeing i bought it from another country, i would rather not have to ship it back, as that might prove very expensive and deprive me from a now indispensable part of my setup. It's still under warranty, for another 2 or 3 years. So is there anything i could from here first to fix this issue?
Would opening the zedr16 void the warranty? how easy/complex is it? and is there anything to be weary of when dismounting it?
hope someone can help. I'll be writing to A & H as well. but thought i might get a quicker reply from here.
Sorry to hear about the demise of your channel 6.
What was plugged into that channel when you pressed the 48V that caused this?
I assume you accidentally pressed the 48V button without a condenser type mic plugged into that channel? But it must have been something that shorted pin 2 and 3 to do that because normally that wouldn't cause a problem with a dynamic plugged in there!
Have you checked the line input jack? That may still work....it looks like from the block diagram that is separated from the mic preamp input via decoupling caps and the line in jack is after the phantom power at the mic stage.
Have you checked all the other channels and does the phantom power still work properly on those channel's?
If the phantom power doesn't work properly on the other channels, you may be lucky and blown a fuse on the 48VDC phantom supply. I would suspect the decoupling capacitors at the mic preamp though. Whatever you had plugged in there must have shorted those out. Hopefully you didn't somehow damage the mic preamp itself.
Was there any smoke, sparks or smell of burnt components?
If you are handy with repairing electronics and have all the tools and schematics you might be able to fix it but that would be totally out of warranty....once you do that I'm pretty sure A&H would disallow any warranty. That's sort of a given.
I believe each channel comes out the front and is plugged into a buss panel at the back. So to get to that area you would need to remove all the knobs and a handful of screws from the front plate. That would give you access to the channel card which can then be unplugged from the buss panel. If you do undertake this yourself please be sure to take lots of photos and document it for posting here in the thread as it would be interesting and helpful to other people in the future!
Also most of the components will be SMD (surface mount devices) and reworking and repairing those can be very difficult and tricky unless you have the proper tools.
You could remove the bottom cover and see if there are any fuses blown which if you can locate them could be an easy fix and checked with a meter.
But again if you are not educated or knowledgeable in repairing electronic sub-assemblies you will more than likely do more damage than good!
A&H has repair and service centers all over the world that does not require you to ship it back to the factory. They use local audio/electronics repair shops authorized by the factory to make repairs for you. They will have the tools, parts and schematics to repair it properly. I'm pretty sure this won't be covered under your warranty if this was due to your own connection error and not a fault in the mixer itself. It would be covered if this was a flaw or fault in the channel board. But A&H has only a one year warranty, so if you have some sort of extended coverage with a secondary party, you would need to contact them for any reimbursement.
I would email or contact A&H Support and ask them for the closest local repair shop in your area.
Good luck and I hope you can get it fixed!