Author Topic: Mackie 1402 VLZ mixer hum on main output  (Read 1748 times)

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Offline BluesCamTopic starter

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Mackie 1402 VLZ mixer hum on main output
« on: December 30, 2015, 10:13:20 pm »
Hello. My 1402 VLZ Mackie mixer has immediate hum when turned on and with no inputs. I took the back off and it looks
like the power supply caps are on a separate small board that is riveted to the main board. Any idea how to separate it?
Thanks!
 

Offline BluesCamTopic starter

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Re: Mackie 1402 VLZ mixer hum on main output
« Reply #1 on: January 03, 2016, 06:13:31 pm »
Doah! They are tiny Allen screws! These old eyes finally realized that.
 

Offline Richard Crowley

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Re: Mackie 1402 VLZ mixer hum on main output
« Reply #2 on: January 03, 2016, 07:02:10 pm »
Do ALL of the outputs hum?  That would indicate a "systemic" problem, likely failure of a power bulk filter capacitor, etc. What test equipment do you have access to?
 

Offline BluesCamTopic starter

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Re: Mackie 1402 VLZ mixer hum on main output
« Reply #3 on: November 12, 2017, 12:25:05 am »
Sorry I missed your reply. I think you are right. Since it is a very old mixer now, I don't want to try to repair it. Thanks for your input!
 

Offline Richard Crowley

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Re: Mackie 1402 VLZ mixer hum on main output
« Reply #4 on: November 12, 2017, 05:25:20 am »
If you want to dump it, I will take it.  What scrap value do you put on it?
 


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