Question about Mackie Music
First, unless you are a trained or self-taught audio technician, don't attempt to repair the unit yourself. Let the professionals repair it. You can damage it beyond repair if you don't know what you're doing.
Non-working channels are caused either by bad connections, bad solder joints or a dead IC op-amp.
The causes of weak channels can be more challenging to track down. I'd suspect bad connections, dirty controls or connectors.
Posted on Nov 06, 2018
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Posted on Jan 02, 2017
If all other functions work for those channels, the most likely problem is the fader itself. These can fail and operate more like switches rather than faders. Without witnessing the behavior, I can not state that for sure. While these mixers are not the hardest to work on, they are time consuming. The faders can be purchased from Mackie directly. If you need to have this repaired, any shop that repairs audio gear should be able to erpair this for you. Where are you located?
Posted on Feb 12, 2009
Yes, the ribbon cable is the 1st thing I would check. You can check the ribbon like this: Disconnect said cable from the channels. Connect cable connector from a known good channel to the problem channel. If channel sounds the same trace a signal through the channel op-amps.
Posted on May 29, 2009
SOURCE: Mackie 1604 VLZ3 Issue.
It sounds like power supply issues.
You may have bad capacitors and/or bad regulators.
If you have a multimeter you can get in there and check the dc voltages for ripple(ac voltage mixed with dc) or over/under voltages along the +/- 15volts lines.
Posted on Jan 20, 2010
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