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Mackie 1402 VLZ mixer hum on main output
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Topic: Mackie 1402 VLZ mixer hum on main output (Read 1748 times)
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BluesCam
Newbie
Posts: 5
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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!
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BluesCam
Newbie
Posts: 5
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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.
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Richard Crowley
Super Contributor
Posts: 4317
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KJ7YLK
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?
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BluesCam
Newbie
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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!
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Richard Crowley
Super Contributor
Posts: 4317
Country:
KJ7YLK
Re: Mackie 1402 VLZ mixer hum on main output
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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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