Reviving HR824s

[flashofthedark]

I found a Fixya of someone mentioning they used oil contact treatment on sw3, describing it as a low pass switch, saying it had bad contacts. I assume he's referring to the Low Freq. Switch. The quote is here:

sw3 on the rear is low pass sw is bad contacts, c61 and oil contacttreatment,ok.

Not sure if c61 refers to the service manual somewhere or if that's something else I need to buy and use. I'm also not sure if it's okay just to use the oil contact treatment on the outside of the unit. I opened it and don't see a way to apply the liquid to the inside.

[Lights]

I had a woofer go out on one of my HR824s and GlenTennison fixed them up for me. It was a connection issue probably like yours. He is a former Mackie engineer from back when they still made their stuff here in WA. (Mine are original units from their first production run.) You might try PMing him for advice.

[flashofthedark]

Originally Posted by Lights

I had a woofer go out on one of my HR824s and GlenTennison fixed them up for me. It was a connection issue probably like yours. He is a former Mackie engineer from back when they still made their stuff here in WA. (Mine are original units from their first production run.) You might try PMing him for advice.

Thanks Lights,
I'm going to go pick up some CRC Cleaner that some guys recommend using for pots and switches. If that doesn't work I'll probably PM GlenTennison. My repair guy in town just retired.

[flashofthedark]

It was a contact problem.

I got a can of CRC QD Electronic Cleaner (Quick Drying Formula), powered off the monitor, sprayed it into each switch and pot, played with each switch and pot about 10 times, put it outside to dry for about 20 minutes, turned it on, and it works fine. Repeated with the other monitor with the same results.

I may still need to contact your friend to work on one of the speakers, as one tweeter sounds different from the other, but for now I'm up and running again. Thanks, Lights.

[Lights]

Glad it was something simple. I think the original HR824 is a great speaker... they just need a little TLC when they push 20 years old!