Mackie TH-15A dead

[olddawg]

A buddy of mine just brought me a Mackie TH-15A that was dropped from a pickup truck when loading. It no longer powers up. Visual inspection doesn't show anything obvious. Before I dig in to it I just thought I would ask if there are common issues with this model? I'm familiar with troubleshooting smps and such. Just thought I would ask first. It was working before the fall which was a couple of feet at the most.

[Enzo]

Common issues? It fell off a truck and quit working. Start at the start, something broke. Is mains voltage even getting to the SMPS?

[olddawg]

Common issues? It fell off a truck and quit working. Start at the start, something broke. Is mains voltage even getting to the SMPS?

Yeah Enzo, I know that. I was just asking if there was a weak point. I can see these being bounced around a lot and maybe there was a common issue that you guys that have seen a few have noticed. I'll start troubleshooting. Never hurts to ask. Thanks

[warunasanjaya55]

Olddawg should meet an authorized Mackie dealer near Olddawg or connect one of Mackie dealers online.

[soundguruman]

"It fell off a truck and quit working."
Maybe you should leave it dead. Maybe it's a sign.

[olddawg]

So... I dug into this thing. My friend said he actually dropped it a foot on carpet. I found than mostly everything was working. The power supply, the power amp. I thought. This should be easy. I quickly found that I was wrong. Directly connected to the input xlr connector is a metal box. I could get some signal through it. Inside that metal box are 3 nested double sided boards. This thing has a 5 band digital eq. Those boards contained an a/d converter and a d/a converter with a 250 pin processor chip in between. You could not trouble shoot it without an expansion cable set. But really, a processor for a tone control. 3 double sided boards mounted to the chassis on top of each other by 1/4 inch steel stand offs and no sress relief? Anyway, I handed it back to my friend and told him to order a repackaged unit from some big box store, swap out the whole assembly, then return the repackaged unit as not working. I don't usually condone such behavior, but this pos was unsevicable. I would not recommend owning one. It seems Mackie could do better!