My QSC GX3 has a red light that turned on (on the front panel). The channel is not working. Is this a fuse or something else?

The red clip lights on the QSC RMX2450 indicate that the amplifier is receiving a signal that is too strong and could cause distortion or damage to the speakers. The green lights indicate that the signal is within a safe range. When there is no input signal, the amplifier defaults to the red clip lights as a precautionary measure. Once a signal is received and it is within the safe range, the lights turn green. This is a normal behavior for this amplifier.

Check the triac that is at the output

Check for shorted speakers, if ok check output transistors for short

Hi,
this power amp uses 2SA1962 and 2SC5242 output transistors. You can download the schematic diagram from this website.
Thanks.
gylacz

For QSC amps the GX series are not bridgeable. You will have to run one speaker to each channel.

Register and download the manual for free at retrevo.com

http://www.retrevo.com/support/QSC-GX3-Amps-manual/id/23107ag606/t/2/

See page 7.

"CLIP: red, to the left of each Gain control.

Normal indication: illuminates whenever the amplifier is driven beyond full power. The LED's brightness indicates the amount of distortion. Distortion that causes only brief flashing may not be audible.

During muting, the indicator fully illuminates. This occurs during normal "On-Off

Does it do it with nothing connected to the inputs and outputs? If yes, something internal.. anything loose in there (is it moved alot and something could have fallen inside of it)

Sounds like an output going bad. Try to get some electronic contact cleaner and spraying on the circuit board. If its corroded this will help clean the circuit..

i have a pyle pro 1000 watt max 2 channel mono and 2 channel stereo and when i get that thing loud the little red light cums on basically what i mean is that the amp on channel one is cooked i myself i wouldn't even use it y cause more damage

There is a bad connection in the other channel or the speaker relay has a bad contact in it.