Mackie Reach - no output

[Wyatt_earp]

Good evening,
new to this forum....... be gentle plz
I have run a mobile disco for many years and have always undertaken any repairs required (amps, mixers, lighting etc) myself with a 99% success rate. I have been given a Mackie Reach active 'all in one' type active speaker to have a look at as I have done many repairs to Mackie equipment (my own) over the years.
The reported problem, and I have tested as such, is that there is no output, no hum from speakers but the unit will power up, the LED's show a signal and it will connect via bluetooth to allow all functions as supposed to. I suspect that there is more than likely a fault with the output amp section. I removed the access screws (all 26 of them - why oh why???) and had a brief look before re-assembling and reducing myself to a trembling mess in the corner of the room! The power supply/power amp appear to be one board with a seperate board to the side to operate the functions. None of the components are easily accessible due to the amount of 'silicon/glue' that adorns the pcb and all the wiring is wrapped in foam.
Questions are, are these units repairable or are they planned to be throw away and replace, are they worth repairing (given that this is now a retired model)? I also discovered that under the 'removable' carry handle a USB port along with a number of pins to one side in form of a 'plug' - Is this arrangement for diagnostic purposes?
Obviously this is probably 'the way forward' with equipment and as I replace my own with newer technology the chances of repairing my own equipment (as I have done for 25+ years) diminishes.
I would like to be able to continue being 'self sufficient' so are there any publications I could look for to assist in self education?

Thanks for you time.

[Jon Snell]

There are many model numbers, what is yours?
They are usually compact inside with hot glue and ginge holding components down, repairable if you are conversant with class D and SMD components. Otherwise they make a good door stop.
Made in China by Loud Technologies at a very budget price.

Welcome to the forum by the way.

[Randall]

If there is no hum or detectable noise from the speaker, did you check the speaker? A 9v battery clipped on/off the terminals will tell you a lot.

[Wyatt_earp]

Thanks for replies. I will maybe keep it aside for a long term project to become familiar with this type of device. I would have checked the speakers, and maybe should have, but there are 6/7 in the cab and, maybe wrongly, assumed that they wouldn't all blow at same time (there wasn't the usual 'crunch' when gently pushing the cones. The board reminded me of a very old 'Boss' rythym machine I had years ago - looked like tar had been poured over to stop any repairs.
I'll check the model number next time I'm at my workshop. Been concentrating on my 'real' job during the pandemic and am only managing a few times per month to 'play' about with interesting things At the moment, I will be using it as a door stop.

[J M Fahey]

new to this forum....... be gentle plz

Hey guys!!!! A Newb!!!! Get ready the tar and feathers!!!!!!
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No, no need to worry
Not HERE!!!!

As of your Mackie, it´s an incredibly complex piece of equipment, doubt even Mackie repairs them at component level, highly suspect full board replacements.

That said, pity you closed it down again with that bucketful of screws, I´d suggest posting a couple clean and well illuminated board closeups, specially the power supply/power amp area.

Maaayyyybbbeeeee something is readily visible, a blown fuse, a random floating wire, etc.
Not likely since they glued/wrapped everything down, but hey!!!!

Also show the speaker guts and wiring, maaayyybeee you can use that digital mixer output to drive an added Power Module which in due time will drive those speakers.

Does it have a Line/mixer out to drive external power amps?

If so, does it work?

[Enzo]

ALl the sspeakers do not need to blow for them all to go silent. A series section of the circuit could open and silence them. A wire connection could, is ther any crossover?