Left channel comes and goes and when I tap really hard near the fader area, sometimes the sound comes back and then disappears again... I am currently trying to find a detailed schematic for this mixer so I can troubleshoot the problems. I already re-zapped all the solder joints to make sure it's not a connectivity problem. also checked all electrolytics by probing them ''in-circuit''... I also found a couple resistor packs with some residue but they metered fine. Can someone please help?
Try investigating the Muting FETs .. typically these are J112 or J113 type FETS and are linked to the outputs ... Locations will be on the TOP of the Fader/Main board close to the output select switches and appear to be T-220 transistor cases.
Sorry, no docs as Behringer is paranoid.
Try cleaning al of the sliders using an electronics cleaning spray. Choose one that contains a lubricant as well. Dirty sliders can cause this especially at low volume levels. If that does not resolve the provblem, update this and we'll look further.
Dan
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