behringer vmx300 dj mixer no main output

[blackpatz]

hi there,
two channels on my dj mixer are not sending a signal to the main output. i have headphone output OK of each channel and a signal is present on all channels but there is a fault when sending to the main output. the third channel is OK no problems. any help? thanks.

 

[bob91343]

Let's see a schematic.

 

[bob91343]

Okay I found the diagram. Looks like the main outputs come from three ICs, IC14 IC15 and IC18. I'd look there for problems. You will need an oscilloscope.

 

[blackpatz]

Thanks bob, i have a CRO so will check out those chips and let you know.