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Author Topic: Mackie HR 824 Studio Monitor...  (Read 4148 times)

Offline gdv

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Mackie HR 824 Studio Monitor...
« on: November 28, 2019, 10:54:27 AM »
Again, Happy Thanksgiving....

My brother & I were talking this morning about his repair issue...

If anyone has any insight or experience, replies would be greatly appreciated...

Thank you so much for considering.... 
George


Mackie HR 824 Studio Monitor will not turn off when in the auto off mode.
Have tried cleaning all switches and pots and this worked for a couple of days for one of the units.  Re-cleaning switches again has not helped.  One of the Mackies has a rear heat sink which gets quite warm when it fails to power off.  Help is needed...
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Offline MacGeek

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Re: Mackie HR 824 Studio Monitor...
« Reply #1 on: November 28, 2019, 11:47:55 AM »
Might there be a signal leaking to it?
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Offline gdv

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Re: Mackie HR 824 Studio Monitor...
« Reply #2 on: December 02, 2019, 09:16:08 AM »
One "bump" into December...  :)

Hope everyone had a great Thanksgiving...


George
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Offline rgpit

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Re: Mackie HR 824 Studio Monitor...
« Reply #3 on: December 02, 2019, 11:15:01 AM »
George,

Does this still happen if the speaker is disconnected from any input? Can you hear any hum or high frequency oscillation in the bad unit?

Ron
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Offline gdv

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Re: Mackie HR 824 Studio Monitor...
« Reply #4 on: December 02, 2019, 12:08:14 PM »
Klaus & Ron, thanks for comments...  Will pass on to my brother for response...

Thanks again...
George
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Offline gdv

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Re: Mackie HR 824 Studio Monitor...
« Reply #5 on: December 02, 2019, 02:25:54 PM »
Reply from bro...

No signal; input disconnected

No Hum  or audible hi freq  Have not checked it with a scope for >20khz freqs

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Offline MacGeek

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Re: Mackie HR 824 Studio Monitor...
« Reply #6 on: December 02, 2019, 03:52:57 PM »
So, it still fails to power off when disconnected from a signal source?
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Offline gdv

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Re: Mackie HR 824 Studio Monitor...
« Reply #7 on: December 02, 2019, 04:17:06 PM »
Correct...
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Offline MacGeek

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Re: Mackie HR 824 Studio Monitor...
« Reply #8 on: December 02, 2019, 04:23:00 PM »
I am no tech, but a stab in the dark leads to a possible bad sensor
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