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I have a Mackie 1604 vzl pro mixer. It has two weak channels and a non working channel. Could give some tips on what I should look for when open up the unit?

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  • 127 Answers

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

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ABRsvcs

  • 4234 Answers

SOURCE: No volume control with 2 faders on Mackie CR1604 mixer

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?

Dan

Posted on Feb 12, 2009

soundchasr

Lawrence Nentwig

  • 11 Answers

SOURCE: Ch. 10 does not work - Mackie 1604-VLZ PRO

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

soundproman7

  • 29 Answers

SOURCE: mackie cr 1604 clip light stays on constantly

Is the PFL button stuck down on these two channels ?

Posted on Jul 24, 2009

barbu51

Jacques Marin

  • 566 Answers

SOURCE: Mackie 1604 VLZ3 Issue.

Hi kielhunt
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.
Good luck

Posted on Jan 20, 2010

Testimonial: "Good ideas, even though he didn't know the answer to the issue fully he was well rounded enough to give great ideas for in-house solutions!"

Fred Yearian

  • 5603 Answers

SOURCE: My old CR1604 mackie mixer

If the hum is observable in headphones, then it is likely a power supply problem, usually a dried out electrolytic filter capacitor.

Posted on Aug 06, 2010

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