QSC Audio Players & Recorders - Recent Questions, Troubleshooting & Support
Qsc usa 900 power amplifier coming on but no signal.what can be the problem.I check all outputs
Are you then saying you have no sound, yet the amp is on? If so, with the unit off, listen carefully to the top of the amp. When you first push the power button, you should hear one click, followed by another click, about 5-20 seconds later. I'm guessing you hear the first click, but not the second. Is that correct? If this is correct, and you are interested in having your QSC repaired, Please visit my website at audioserviceclinic.com. You may contact me there. Thank you.
2/6/2016 3:16:24 PM •
on Feb 06, 2016
The channel 1 the light red is on
As always with stereo amps the two channels are identical, so if one goes wrong you have the other as a control for testing purposes. So if you start by looking and comparing the two channels. that's a start! If a part looks odd on the faulty channel, but is fine on the good channel you have found the problem. You can also do tests, such as touching the two channels with an insulated screwdriver, while powered up. If it buzzers on the good channel, it should buzz on the other channel at that point. Keep away from the power supply and ignore anything that is on it's own, that has no duplicate, or is common to both channels.
I just bought 2 QSC 1400 amps used. One of them powers on and off from the switch on front. The other one powers on as soon as I plug it in. The switch does not do anything.
When you buy anything used there is always the possibility that someone has messed around inside it.
Are these two amps the same you bought? If they are you can open both of them up and see if anything has been changed.
Again if they, are I suspect you will find that someone might have rigged it so the power switch is bypassed. Presumably the switch broke, the person either couldn't find a switch or just couldn't bother to get a new one!
If they are the same model, then the one with the working switch should show you how it is wired correctly.
Don't rewire the other model the same as your good one, till you have replaced the switch. As it could be a safety hazard. I would also advise not using the amp with no power off switch working, till it is replaced. Again due to safety concerns.
12/31/2015 1:23:21 PM •
on Dec 31, 2015
How repair a damages speakon terminal on a qsc rmx 4050 amp?
You would have to replace them. If they are no longer available, you would have to modify the amp to accept another brand of terminals. If you need more assistance, or would like to inquire about repairing it, please visit my website at audioserviceclinic.com. You may contact me there. Thank you.
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