Behringer MX8000 power supply problem??

[mokadi]

Ok - don't shoot me before I speak, I've just had two new engines fitted in my wagon in the last two months, at stupid cost, and I'd love to buy a new mackie or similar, but first I've got to get the behringer mx8000 fixed - to do the work - to get the money - to pay for the motor and new mixer .....

Sorry, had to do the preface thing, I know there are a lot of [understandable] behringer slaters out there. Here's the detail ...

mx8000, working fine, then odd thing happens. My main solo/pfl [red] led goes on, with a selection of channel led's coming on [varying brightness - the -20 green ones]. At present, green led's are channels 1, 3, 5, 8, 10, 11, 12, 14, 17, 18, 20 and 23. Just switched ON/OFF afyter it happened again and it's all fired up fine. Not so good mid session though, obviously!!

... I'm sure there's someone out there who's had the same problem.

Believe me, if I had the money at the moment, I'd get rid immediately and get something 'more professional'. At this point in time, that's not possible.

I've been advised, and through internet search, it seems that it may be overheating, or the transformer is on the way out, or the 18v rail has a problem. I've noone local and reputable to take it to, so I'd rather work out what the problem is, before I get charged up to £250/US$500 for someone to fleece me and tell me it's stuffed.

I obviously get crackly audio through the monitors when it occurs, but the one really weird thing is that when it happens, and then when I SLOWLY flick the power switch OFF - then back ON on the power supply, the sound comes back - albeit for a moment half way across the switching [something discharging??]. Sometimes it happens after 5 minutes of power up, sometimes after 7 hours. I'm done with logic and common sense.

Any help appreciated - even bitching behringer comments if they're constructive to my situation!

 

[superspit]

Ok - don't shoot me before I speak, I've just had two new engines fitted in my wagon in the last two months, at stupid cost, and I'd love to buy a new mackie or similar, but first I've got to get the behringer mx8000 fixed - to do the work - to get the money - to pay for the motor and new mixer .....

Sorry, had to do the preface thing, I know there are a lot of [understandable] behringer slaters out there. Here's the detail ...

mx8000, working fine, then odd thing happens. My main solo/pfl [red] led goes on, with a selection of channel led's coming on [varying brightness - the -20 green ones]. At present, green led's are channels 1, 3, 5, 8, 10, 11, 12, 14, 17, 18, 20 and 23. Just switched ON/OFF afyter it happened again and it's all fired up fine. Not so good mid session though, obviously!!

... I'm sure there's someone out there who's had the same problem.

Believe me, if I had the money at the moment, I'd get rid immediately and get something 'more professional'. At this point in time, that's not possible.

I've been advised, and through internet search, it seems that it may be overheating, or the transformer is on the way out, or the 18v rail has a problem. I've noone local and reputable to take it to, so I'd rather work out what the problem is, before I get charged up to £250/US$500 for someone to fleece me and tell me it's stuffed.

I obviously get crackly audio through the monitors when it occurs, but the one really weird thing is that when it happens, and then when I SLOWLY flick the power switch OFF - then back ON on the power supply, the sound comes back - albeit for a moment half way across the switching [something discharging??]. Sometimes it happens after 5 minutes of power up, sometimes after 7 hours. I'm done with logic and common sense.

Any help appreciated - even bitching behringer comments if they're constructive to my situation!

Hi Mokadi,
yes, I had the same issues, but now I digress.....

first, I'm not too sure there is a need to preface the way you did; I and others are very proud of our/their MX 8000's, they do a very good job for the monies we paid.
Fark the k..z who have nothing but shite to say, but still 'hate' based on 'mostly' heresay.....True, B do make some shit, and I know, because I've owned it!!
Sure...if I had the cash, I'd go for something else that you could actually call a superior unit...But for now, and the semi-long term, mx8000 is proving to be a very acceptable/fine unit.

Now....I had exactly the same issue when I first got my unit....but I had accidentally dropped mine due to the wooden desk I had collapsing!!!....a very bad start to my desk!!....fucked one of my knees up too!

Shortly after the incident all my 'greens' were fading from bright to semi-bright, even with no signal applied!!.
I swithched the desk off, then proceeded to 'cycle' every 5ucking button on that desk, and found that there were 2 buttons, (phantom power) that were 'semi-stuck' down!!...(due to the force of the impact!)
I managed to eventually get them re-alligned so they'd come thru their holes without binding....and everything has been sweet since....

So, go ahead and push (cycle) every one of those buttons, and check the rest of them.... it can't hurt!
I was amazed that desk took the punishment that it did!!
No more 'tricky' green lighting shows either.

Also, do use (a little) contact cleaner and clean the power supply input to the desk, both male and female sides.

Hope that works, you have a great little 48 channel desk there....be proud of it, and look forward to getting something better in the future!

Rock-On.
spit.

 

[RickW]

I had a similar problem. Not just with the green lights, but with the red also...every channel...and any audio would disappear. It was the power supply and fortunately, I had a friend locally that fixed it. But during my online research, I found a place in New York City that actually stocked or rebuilt Behringer power supplies. Sorry I can't remember the name (it was about three years ago), but I'm sure if you do a search you'll be able to find it. Don't know if they can help someone in the UK, but it doesn't hurt to find out.

 

[mokadi]

to add to the MX8000 info ...

HI guys, thanks for the swift response, much appreciated.

I've checked all the pots, sliders and switches, given them a good workout on all fronts. One thing I noticed that I didn't notice yesterday - the two power supply leds [top left] are normally ON [green] -but when the chit happens the right one goes out - the '+18v' led.

Am I guessing that means it's defintiely power supply?

Strangely enough., I thought I'd take a photo to post, and now I can't replicate the problem!!! AArgh ... I unbolted the power supply from the rack and let it hang out slightly - It's at the bottom of the rack to make sure no extra heat is rising into it... - me thinks maybe a dry joint maybe inside. Another tech colleague suggested to resolder all joints inside the power supply. Your thoughts, guys?

mokadi

 

[MOFO Pro]

Strangely enough., I thought I'd take a photo to post, and now I can't replicate the problem!!! AArgh ... I unbolted the power supply from the rack and let it hang out slightly - It's at the bottom of the rack to make sure no extra heat is rising into it... - me thinks maybe a dry joint maybe inside. Another tech colleague suggested to resolder all joints inside the power supply. Your thoughts, guys?
mokadi

I'd take that route with almost any component that was flaking out in an intermittent manner... especially since you pulled the thing apart... and now can't replicate the symptoms...

I couldn't tell you how much broken stuff I've opened up... pulled apart, not found anything amiss, then screwed back together, and had work perfectly...

 

[superspit]

HI guys, thanks for the swift response, much appreciated.

I've checked all the pots, sliders and switches, given them a good workout on all fronts. One thing I noticed that I didn't notice yesterday - the two power supply leds [top left] are normally ON [green] -but when the chit happens the right one goes out - the '+18v' led.

Am I guessing that means it's defintiely power supply?

Strangely enough., I thought I'd take a photo to post, and now I can't replicate the problem!!! AArgh ... I unbolted the power supply from the rack and let it hang out slightly - It's at the bottom of the rack to make sure no extra heat is rising into it... - me thinks maybe a dry joint maybe inside. Another tech colleague suggested to resolder all joints inside the power supply. Your thoughts, guys?

mokadi

there you go!.....It's PSupply related!!
Whether it's a connection issue or an 'in the box' issue is to be determined.
Either way, it's easier to pull apart the PSupply than that bloody desk!!!
Well done!!
Spit.

 

[mokadi]

Mx8000

Thanks guys, will check further into the power supply and see what I can find with a multimeter [leaving the AC supply alone ....].

I'll let you know if I find anything further ...

 

[jamacian]

Thanks guys, will check further into the power supply and see what I can find with a multimeter [leaving the AC supply alone ....].

I'll let you know if I find anything further ...

Hopefully you aren't dumb enough to close a capacitor. Unplugged you can still do some damage.

 

[dementedchord]

first, I'm not too sure there is a need to preface the way you did; I and others are very proud of our/their MX 8000's, they do a very good job for the monies we paid.
Fark the k..z who have nothing but shite to say, but still 'hate' based on 'mostly' heresay......

heresay.... i oughta let you sit there in your spit... i used to do pro service work... the store i was working at the time those came out... the first 10 units 7 were dead right outta the box... so kiss my ass... all 7 of them needed power supplies rebuilt... there were loose connections and bad solder joints... also the heatsinks were underspeced as well as the regulators... i rigged some extra heat sink to the front of the chips.. replaced with higher current devices ... and even added some capacitence pre and post regulators...

but you go on with your little reach around....

 

[superspit]

heresay.... i oughta let you sit there in your spit... i used to do pro service work... the store i was working at the time those came out... the first 10 units 7 were dead right outta the box... so kiss my ass... all 7 of them needed power supplies rebuilt... there were loose connections and bad solder joints... also the heatsinks were underspeced as well as the regulators... i rigged some extra heat sink to the front of the chips.. replaced with higher current devices ... and even added some capacitence pre and post regulators...

but you go on with your little reach around....

wow...fantastic...!
I'm really very proud of ya!!
Oh, mock MY name?..hehehe

I once recall selling 4 Yamaha SPX-90's, back in the day when they were new to the scene, and getting them all returned to the shop where I worked....because they "were dead right outta the box... so kiss my ass... " (unquote)....
My point?....any company is capable of producing crap, and any person is capable of producing negative feedback in the form of the vommit that you seemed to have spewed all over me!!!!........EEEEEWWWHHH!
Anyway, have a great day, and I'll stay out of your 'reach'...
Spit.

ps...let me guess...Yamaha is crap too?

 

[ausrock]

Spit, consider the possibility that you may have been lucky with your desk...........I have a mate up our way that had 3 MX8000's fail not long out of the box, after the third one died it was replaced with an MX9000 which never gave any major troubles.

 

[superspit]

Spit, consider the possibility that you may have been lucky with your desk...........I have a mate up our way that had 3 MX8000's fail not long out of the box, after the third one died it was replaced with an MX9000 which never gave any major troubles.

Ausrock...how are you?

3 unit's fail?, and the 9000 failing aswell?.....faaaaark.....why did he keep purchasing them?..Do you consider your friend to be 'unlucky', or maybe a tad silly?.....respectfully said.

Mate....give me a little credit.....all things considered, and from my own personal experiences with 'B' gear, I've come to my own conclusion and are of the mind that the desk is generally very good...FOR THE MONIES I (WE) HAVE PAID....
I have friends and people who I just plain know that have nothing but success with their 8000's and 9000's..(the reason I bought one!)....but I can also appreciate the fact that every company (as per my previous threads) can make a stack of bullshit as tall as me and you put together.....and more consistantly than some other companies.

How does that sound?..reasonable?

I wish I could afford something from Rupert Neve, but I can't just yet.....I'd have to sell my wheels,..ummmm.....feck that!

Anyway, I appreciate the your response....rock on!.

 

[ausrock]

Spit,

He didn't "keep" purchasing them, each one was a direct replacement for the one before, because as I recall, the warranty service guys couldn't fix the problems, anyways, the mate ended up with the '9000 and it seemed to work OK.

The only Behry gear we have is a set of h/phones and a h/phone amp and both started having silly, annoying, intermittent problems within 6 months of purchase.

 

[superspit]

Spit,

He didn't "keep" purchasing them, each one was a direct replacement for the one before, because as I recall, the warranty service guys couldn't fix the problems, anyways, the mate ended up with the '9000 and it seemed to work OK.

The only Behry gear we have is a set of h/phones and a h/phone amp and both started having silly, annoying, intermittent problems within 6 months of purchase.

yeah, I understand..I guess our meaning of the word 'purchase' may differ slightly there..(as he didn't demand a complete change of brand 24/48 channel mixer after the 2nd faulty unit?...anyways)..but that's still some pretty bad luck.....so therefore, I must be a 'lucky' summvbitch!

 

[mokadi]

MX8000 - NOT the power supply ...

HI guys

Had the desk and PSU checked out by a good guy locally, he's tested the PSU and says it's ALL ok. The voltages are a little variable - come in at just under 18v in places, but fuses, transformer, and voltage regulators all A OK.

He says to take the desk apart could be more expensive than finding another desk, so unfortunately I'm none the wiser. He wouldn't even get the screwdriver out without a wiring diagram ... and I can't find a wiring diagram/schematic for love nor money ...

Aaah joy. Just got it back, using my other [spare] 24 track desk for now, without the routing capabilities - but at least I can work. However - I still don't seem to have got to the bottom of the problem. [I don't give up easily! ...]

What are the chances that I may have blown one of the input circuits? I'm fishing in the dark, but it sounds like definitely under the cover of the desk, and I could spend a heck of a time searching and still find nothing. I'm sure I'm not the only one this has happened to - although I read a Sound on Sound thread where someone said 'change the PSU fuses' - that doesn't make sense, as they're tested ok, and logically if they had gone, the whole desk wouldn't have power.

If anyone has any ideas on where to go from here, mucho appreciato BBS peeps!

Mokadi

 

[MCI2424]

"...Hi Mokadi,
yes, I had the same issues, but now I digress.....

first, I'm not too sure there is a need to preface the way you did; I and others are very proud of our/their MX 8000's, they do a very good job for the monies we paid.
Fark the k..z who have nothing but shite to say, but still 'hate' based on 'mostly' heresay"...



I have posted many times that the MX8000 is a good board. Behringer went way down hill after that console was sold. It is as good as the Mackie they copied. I still have one in mint condition (used it for monitoring in my studio).

I never had any problems with it after daily use for 5 years.

 

[kubeek]

HI guys

Had the desk and PSU checked out by a good guy locally, he's tested the PSU and says it's ALL ok. The voltages are a little variable - come in at just under 18v in places, but fuses, transformer, and voltage regulators all A OK.

He says to take the desk apart could be more expensive than finding another desk, so unfortunately I'm none the wiser. He wouldn't even get the screwdriver out without a wiring diagram ... and I can't find a wiring diagram/schematic for love nor money ...

Aaah joy. Just got it back, using my other [spare] 24 track desk for now, without the routing capabilities - but at least I can work. However - I still don't seem to have got to the bottom of the problem. [I don't give up easily! ...]

What are the chances that I may have blown one of the input circuits? I'm fishing in the dark, but it sounds like definitely under the cover of the desk, and I could spend a heck of a time searching and still find nothing. I'm sure I'm not the only one this has happened to - although I read a Sound on Sound thread where someone said 'change the PSU fuses' - that doesn't make sense, as they're tested ok, and logically if they had gone, the whole desk wouldn't have power.

If anyone has any ideas on where to go from here, mucho appreciato BBS peeps!

Mokadi

Are you sure the guy checked it under load? It´s easy to measure the plain voltage, but he should also check it while drawing the rated current from both/all polarities simultaneously, and for a long time.

If teh PSU is allright, then you should try opening the desk from the back, and check the power wires and swithes, maybe use wd-40 on phantom and power .

 

[MOFO Pro]

Are you still experiencing the problem... your last post indicated that you couldn't replicate the problem with the power supply opened up...

It's also intermitent in nature... so it could be that it never cropped up while the tech was checking voltages. It would be better to check supply voltages while the event was occurring.

And it could be resolved... and you're looking to fix a condition that no longer exists...

 

[dementedchord]

you said the voltages were a little low??? underload or just the supply be it's self??? if the later that's definately a problem.... when not hooked to the board it should read something aproaching +/-20 volts...

 

[superspit]

"...Hi Mokadi,
yes, I had the same issues, but now I digress.....

first, I'm not too sure there is a need to preface the way you did; I and others are very proud of our/their MX 8000's, they do a very good job for the monies we paid.
Fark the k..z who have nothing but shite to say, but still 'hate' based on 'mostly' heresay"...



I have posted many times that the MX8000 is a good board. Behringer went way down hill after that console was sold. It is as good as the Mackie they copied. I still have one in mint condition (used it for monitoring in my studio).

I never had any problems with it after daily use for 5 years.

this is really good to hear!!....It's amazing how some people get a bash over comments like this, and other's don't!..( I still often wonder why they do it, and how counter-productive some 'brand' comments really can be).

Anyway, Mokadi, sorry that your PSU checked in as ok....would've been easier to fix that than opening this particular desk!
Mine is still going strong, after I did the 'button thing', I posted earlier.
(and mine was doing pretty much exactly what yours was doing...)

BTW..my PSU measures a tad under 18 volts, under load!!
Regards,......