Question about Equalizers & Crossovers
Theres no sound coming from the output at all. the mixer powers on and registers an audio input (meters light up etc) but no sound at all. it is deffo not wires connections it deffo is the internal workings of mixer. I just want to know which part has malfunctioned/blown and if it is worth fixing or not and if i could do it myself
SOURCE: behringer mixer UB 1622 fx pro
I've seen inside these mixers (euroracks) and they have a recurring problem.
Next to each op-amp there are small decoupling caps from the power supply rails to ground. These caps, due to 'cost constraints' have 1 volt of headroom- the rails are at 15 volts and the caps rated 16v.
This means they have about a 65% chance of failure.
Also, the psu. is connected via a connector. If you disconnect this and see if the psu powers up with a meter you can figure out if the psu is broken or if the circuit board is 'dragging it down'.
Hope that helps.
Posted on May 28, 2008
So you get power to the unit, but no sound coming out? How about through the headphones, do you get sound coming out of the headphones?
Are all the volumes and gains raised up? All the eq's are up? Check the back of the mixer, there is a master gain volume - where the connections are - make sure this is up also.
If nothing, then you'll need professional help at this point.
DJ Equipment Repair & Service
A DJ Pro Audio Co.
Posted on Dec 18, 2008
It sounds like you have ground loops. This is noise generated by having interconnected equipment grounded at different physical locations. Especially a problem if you have a cable from your cable TV provider connected into your equipment.
Remove EVERY connection into and out of the mixer. Plug in headphones. Noise? If so, mixer needs repair. If not, re-connect equipment 1 piece at a time and assess for noise. If it slowly increases as you add connections you will need expert on-site help to fix it. If it is sudden, what was just connected is the source and steps need to be taken to lift the ground on the connection to that equipment.
Posted on Apr 21, 2009
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