soulman Posted December 25, 2010 Report Share Posted December 25, 2010 dear members, found this forum in research for the mackie hui schematics. my hui broke and i need information about the psu + transformer, because the hui doesn´t power up anymore. would be very thankful for every helpful link. nice holidays soulman Quote Link to comment Share on other sites More sharing options...
ilmenator Posted December 25, 2010 Report Share Posted December 25, 2010 Hi and welcome, I'm afraid you're in the wrong forum. This is about DIY of MIDIboxes of all kinds, the Mackie emulation that some of these provide is just a very small part of the big picture. We are not particularly focused on Mackie HUIs, and as far as I can tell, people here are not more likely to have the schematics than those in any other music gear forum. Anyways, if you are somewhat knowledgeable about electronics, you might want to open up your unit and have a look at the capacitors on the PSU board. If their tops are somewhat lifted up from the inside, that's a good indicator of a problem with them. WARNING: Be extremely careful with handling switching power supplies, they can be hazardous long after they have been unplugged from the main's outlet. Best, ilmenator Quote Link to comment Share on other sites More sharing options...
phunk Posted December 25, 2010 Report Share Posted December 25, 2010 (edited) dear members, found this forum in research for the mackie hui schematics. my hui broke and i need information about the psu + transformer, because the hui doesn´t power up anymore. would be very thankful for every helpful link. nice holidays soulman if you open it up, you would get the information needed. If you dont want to open it up for whatsoever reasons, you have to give it to a prof. repair center anyway. ;) i found this btw: http://www.gearslutz.com/board/geekslutz-forum/37870-mackie-hui-schematics.html Edited December 25, 2010 by phunk Quote Link to comment Share on other sites More sharing options...
Screaming_Rabbit Posted December 25, 2010 Report Share Posted December 25, 2010 HUIschem1.pdf HUIschem2.pdf Quote Link to comment Share on other sites More sharing options...
soulman Posted December 26, 2010 Author Report Share Posted December 26, 2010 HUIschem1.pdf HUIschem2.pdf Thank you all very much. the problem is that the transformer was not labeled with any information but the mackie intern part number. I hope i can get it when i take a look at the schematics. again, thank you for your help! Quote Link to comment Share on other sites More sharing options...
julienvoirin Posted December 26, 2010 Report Share Posted December 26, 2010 That's a f***ing PSU ! a good schematic to pick Quote Link to comment Share on other sites More sharing options...
phunk Posted December 26, 2010 Report Share Posted December 26, 2010 That's a f***ing PSU ! a good schematic to pick The transformer ist not part of the schem as far as i can see it. That would back up the user-experiences described in the thread i linked... Quote Link to comment Share on other sites More sharing options...
soulman Posted December 29, 2010 Author Report Share Posted December 29, 2010 Hell ya, It's really frustrating, theres no Info about the transformer. Contcted mackie,loudtechnic Service and the Guy from gearslutz Forum. No answer at all. Does anybody Know which Kind of xfmr i Need? Best Soulman Quote Link to comment Share on other sites More sharing options...
Janis1279 Posted December 29, 2010 Report Share Posted December 29, 2010 (edited) Hell ya, It's really frustrating, theres no Info about the transformer. Hi, Have you a multimeter ? The Fuse (-es ) are OK ? Is your transformer absolutely dead ? Can you measure the windings ( the primary, the secondaries ) resistances without adding supply voltage? The secondary DC voltage part, can partly tell to you more about voltages: what kind of the voltage stabilisers are used, working voltages on the electrolitic capacitors , etc. Regards, Janis Edited December 29, 2010 by Janis1279 Quote Link to comment Share on other sites More sharing options...
TK. Posted December 29, 2010 Report Share Posted December 29, 2010 Btw.: the schematics are interesting - I haven't expected that Mackie controls motorfaders with an analog circuit. Thats the way how Rasmus started the MIDIbox MF story some years ago, but we decided to go for total digital control due to the reduced complexity. Best Regards, Thorsten. Quote Link to comment Share on other sites More sharing options...
soulman Posted December 30, 2010 Author Report Share Posted December 30, 2010 The transformer is deader than dead ! Nothing to measure. The only thing i found is the Core size which is 0.875" x 1.25". Any idea? Thanks for your help. Quote Link to comment Share on other sites More sharing options...
Screaming_Rabbit Posted December 31, 2010 Report Share Posted December 31, 2010 The transformer is deader than dead ! Nothing to measure. The only thing i found is the Core size which is 0.875" x 1.25". Any idea? Thanks for your help. ... you did not answer this question: The Fuse (-es ) are OK ? Can you measure the primary side of the transformer at the solder joints? Greets, Roger PS: Since this post goes into the direction of servicing a non-MidiBox, I'll move it to "Misc" Quote Link to comment Share on other sites More sharing options...
soulman Posted December 31, 2010 Author Report Share Posted December 31, 2010 Both fuses are ok. Voltage at transformer Input is ok, but there's nothing comming out of the transformer. Quote Link to comment Share on other sites More sharing options...
Screaming_Rabbit Posted December 31, 2010 Report Share Posted December 31, 2010 Well... you're having the shematics now and you can take it out of it, what voltages you need. I think I would hook it to a LaborPSU and measure what the circuit draws while in heavy use (when the MFs are moved). Greets, Roger Quote Link to comment Share on other sites More sharing options...
foghorn Posted July 15, 2014 Report Share Posted July 15, 2014 Thanks for posting the schematics. I have a HUI with dead audio, this will help much in tracking that down. Quote Link to comment Share on other sites More sharing options...
Htidwell1970 Posted January 12, 2020 Report Share Posted January 12, 2020 I know this is an old thread but I've been sitting on 2 mackie HUIs I got from a warehouse default sale - scratching my head for almost 2 years... neither start up I tried replacing suspect caps but no love... Did anyone ever figure out the transformer specs? Sorry to hijack your board Midibox guys - this is the only active thread I could find on the net... Thanks for tolerating us and thanks in advance to anyone that can help! Holly Quote Link to comment Share on other sites More sharing options...
Antichambre Posted January 12, 2020 Report Share Posted January 12, 2020 2 hours ago, Htidwell1970 said: I know this is an old thread but I've been sitting on 2 mackie HUIs I got from a warehouse default sale - scratching my head for almost 2 years... neither start up I tried replacing suspect caps but no love... Did anyone ever figure out the transformer specs? Sorry to hijack your board Midibox guys - this is the only active thread I could find on the net... Thanks for tolerating us and thanks in advance to anyone that can help! Holly Hi,Service Manual schematic #1 schematic #2 Transformer is a 0-24-48V and can be found here:http://www.loudtechnologies.eu/shop/en/mackie-mcu-midi-controllers/hui/600-032-01/a-4082-10000210 Best regards Bruno Quote Link to comment Share on other sites More sharing options...
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