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ken long



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Mackie Overheated. Advice Needed.
      #635668 - 10/07/08 12:13 PM
Hi,

I'm sorry if this is the wrong section, the 1604vlz by Mackie is not new but probably not vintage yet but as its discontinued, I was hoping this would be an appropriate place for this post.

I left a 1604 on overnight and the next morning found that it had shut down by itself and will not power up now. I suspect overheating (the room was very warm when I came in in the morning).

I have checked the fuse and it is still good.

Could anyone advise me on a possible fault and any possible DIY fixes?

Thank you for your time.

ken

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Jeraldo



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Re: Mackie Overheated. Advice Needed. new [Re: ken long]
      #635691 - 10/07/08 01:34 PM
You've checked the obvious: checking the mains supply, and using a different power cord? I doubt that your room reached temperatures that would be detrimental to the Mackie, unless you left it in the sun or some similar condition.

Prior to this, have you had problems?


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Tui
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Re: Mackie Overheated. Advice Needed. new [Re: ken long]
      #635704 - 10/07/08 02:15 PM
Unless you know what you are doing, forget about the DIY approach. Take it to a qualified technician.


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ken long



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Re: Mackie Overheated. Advice Needed. new [Re: Jeraldo]
      #635711 - 10/07/08 02:26 PM
Quote Jeraldo:

You've checked the obvious: checking the mains supply, and using a different power cord?




Yup.

Jeraldo Quote:

I doubt that your room reached temperatures that would be detrimental to the Mackie




That's what I thought and the manual says it can easily be left on for days on end.

Quote Jeraldo:

Prior to this, have you had problems?




I don't use it very often nor intensively but I've never had any issues.

Thanks for your time and reply.

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ken long



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Re: Mackie Overheated. Advice Needed. new [Re: Tui]
      #635716 - 10/07/08 02:29 PM
Hi Tui,

Well there can't be too many reasons why its gone down and I suspect its down to the power supply somehow but I was really after confirmation from someone who may have had this happen to them and what steps they took to resolve the problem. If its a quick, easy fix, I would prefer to do it myself.

Thanks for your time and reply.

ken

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Mike Craig
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Re: Mackie Overheated. Advice Needed. new [Re: ken long]
      #635727 - 10/07/08 02:52 PM
Ken,

When you say you checked the fuse, I take it you checked the fuse in the 3 pin plug as well as the mixer's internal fuse?

Mike.


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ken long



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Re: Mackie Overheated. Advice Needed. new [Re: Mike Craig]
      #635731 - 10/07/08 02:59 PM
Quote Mike Craig.:


...as well as the mixer's internal fuse?





Non. . Is this the same type as the one from the plug (i.e. Slo Blo???). Is it user serviceable?

Thanks Mike.

ken

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Mike Craig
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Re: Mackie Overheated. Advice Needed. new [Re: ken long]
      #635735 - 10/07/08 03:06 PM
The internal fuse is rated at just 0.5 amps.

DISCONNECT THE MACKIE FROM THE MAINS BEFORE OPENING THE FUSE DRAWER.

The fuse drawer is just below where the power chord plugs into the desk.

You can test the fuse using a fluke (multimeter).

If you need to replace it, use a 0.5A (500mA) SLO BLO 5x20mm fuse.

NOTE: THIS FUSE RATING ONLY APPLIES TO 240V MACKIE MIXERS.


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ken long



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Re: Mackie Overheated. Advice Needed. new [Re: Mike Craig]
      #635746 - 10/07/08 03:29 PM
Quote Mike Craig.:

The internal fuse is rated at just 0.5 amps.

DISCONNECT THE MACKIE FROM THE MAINS BEFORE OPENING THE FUSE DRAWER.

The fuse drawer is just below where the power chord plugs into the desk.

You can test the fuse using a fluke (multimeter).

If you need to replace it, use a 0.5A (500mA) SLO BLO 5x20mm fuse.

NOTE: THIS FUSE RATING ONLY APPLIES TO 240V MACKIE MIXERS.




Sorry Mike, I should have been more clear. that is the fuse I checked. Where is the other one located?

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Mike Craig
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Re: Mackie Overheated. Advice Needed. new [Re: ken long]
      #635796 - 10/07/08 05:22 PM
Ken,

If you have checked the fuse in the 3 pin plug and also the 0.5A fuse within the unit, then you have checked both fuses.

There are no other user servicable parts with this desk, to my knowledge.

COntact Loud Technologies, who are the authorized Technical Support people for Mackie in the UK.

[Email] euservice@loudtechinc.com


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Steve Hill
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Re: Mackie Overheated. Advice Needed. new [Re: ken long]
      #635811 - 10/07/08 06:03 PM
Mike... Ken is in South Africa.

--------------------
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ken long



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Re: Mackie Overheated. Advice Needed. new [Re: Steve Hill]
      #635815 - 10/07/08 06:07 PM
Quote Steve Hill:

Mike... Ken is in South Africa.




My location clearly states The Orient. Or is this a veiled reference to an earlier posting of mine?

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ken long



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Re: Mackie Overheated. Advice Needed. new [Re: Mike Craig]
      #635819 - 10/07/08 06:14 PM
Quote Mike Craig.:



COntact Loud Technologies, who are the authorized Technical Support people for Mackie in the UK.

[Email] euservice@loudtechinc.com




Thanks! I did! I got their details from the Mackie website. I found a soemone who will service it not to far from me (Essex, because I live in East London ). I thought perhaps I could do it myself.

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IvanSC



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Re: Mackie Overheated. Advice Needed. new [Re: ken long]
      #635957 - 11/07/08 05:18 AM
There seem to be a lot of you guys out there who think that "servicing" an amp is a DIY job for someone with zero electronic skills.
Firstly, in 100% of cases, if an amp stops running it is not a case of servicing, but repairing something, even if that something IS only a fuse that has blown.
Fuses blow for a reason. They are in the circuit expressly to stop a localised failure taking out the whole shebang.
If you know nothing about electonics (as opposed to being able to change a fuse or fit a plug) you really should leave it to a pro.
This is dangerous stuff, folks.

And once again I will reiterate what I have said many times on here. Non-valve audio has no need of regular servicing, despite anything you are told by so-called engineers.

There isn`t usually anything inside the box that is going to wear out and need replacing automatically.

The only way you can be sure that a part needs replacing in electronics is when that part dies.

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Mike Craig
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Re: Mackie Overheated. Advice Needed. new [Re: IvanSC]
      #636000 - 11/07/08 08:53 AM
Changing the internal fuse on a Mackie 1604 VLZ PRO is a simple task that should be within the capabilities of most people who have even a modest level of technical knowledge.

If a mixer seems dead, then I would definately suggest checking the fuse before calling in the professionals, remembering to disconnect the mixer from the mains supply.

In fact, that's what it tells you to do in the manual.

http://www.mackie.com/pdf/1604vlzpro_om.pdf

If you replace the fuse and it blows again, then as Ivan says, call in the pros.


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ken long



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Re: Mackie Overheated. Advice Needed. new [Re: IvanSC]
      #636008 - 11/07/08 09:10 AM
Quote IvanSC:

There seem to be a lot of you guys out there who think that "servicing" an amp is a DIY job for someone with zero electronic skills.




Mince alors! I'm not completely inept thank you!

Quote IvanSC:

Firstly, in 100% of cases, if an amp stops running it is not a case of servicing, but repairing something, even if that something IS only a fuse that has blown.




Yes. That's what I want to do.

Quote IvanSC:


The only way you can be sure that a part needs replacing in electronics is when that part dies.




Agreed. In my case its most likely the power supply and it shouldn't be rocket science to replace.

I hope you can appreciate that I don't want to ask someone else to repair it when the job is likely to cost half what we paid for the unit in the first place.

Thanks for your input.

ken

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Tui
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Re: Mackie Overheated. Advice Needed. new [Re: ken long]
      #636146 - 11/07/08 01:52 PM
I guess the point is, if you are technically competent, you might be able to save a few £s by repairing it yourself. However, should there be the slightest doubt that you might not fully understand all relevant issues to do with mains wiring and grounding, you might in the end pay for any errors not with £s, but with a few decades of your life span.


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ken long



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Re: Mackie Overheated. Advice Needed. new [Re: Tui]
      #638511 - 18/07/08 01:22 PM
Well, sorry to dissappoint the nay sayers but have managed to pinpoint the problem down to the transformer and not the circuit board. Sure it took me while but I've saved money by doing it myself wiht a little common sense (and a little help from my friends!).

Anyway, its probably the thermal cutoffs and so I'll need to replace the entire transformer as they aren't accessible.

Its made by BILLION and its part number appears to be 600-006-01. I've been googling but this company doesn't seem to come up. Could anyone help?

Thanks for your time.

ken

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Tui
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Re: Mackie Overheated. Advice Needed. new [Re: ken long]
      #638538 - 18/07/08 02:07 PM
Do you really think anybody here is going to be stupid enough to give you "advice" about how to mess around with the mains wiring of your gear? It's bad enough that you insist on behaving irresponsibly, considering that you obviously lack training and qualifications in servicing electronic equipment.


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Mike Craig
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Re: Mackie Overheated. Advice Needed. new [Re: ken long]
      #638545 - 18/07/08 02:15 PM
Ken,

I have followed your plight with interest. Your ability to track down the component in question shows your competence is greater than we initially suspected.

You can send Billion an email, to find out if a replacement transformer is available (make sure the health and safety police aren't watching ):

sales@billion.com


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ken long



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Re: Mackie Overheated. Advice Needed. new [Re: Tui]
      #638546 - 18/07/08 02:20 PM
Quote Tui:

Do you really think anybody here is going to be stupid enough to give you "advice" about how to mess around with the mains wiring of your gear?




I never asked for that. If you're not going to be helpful, probably best you refrain from posting replies. You certainly bring nothing to this thread and I don't appreciate your tone.

ken

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ken long



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Re: Mackie Overheated. Advice Needed. new [Re: Mike Craig]
      #638549 - 18/07/08 02:22 PM
Thanks for the email address Mike.

FYI, I won't be replacing the transformer myself. Contrary to whatever others may think, I do know my limitations.

Thank you all for warning me of the potential hazards and any help you've offered me.

Much appreciated,

ken

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Tui
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Re: Mackie Overheated. Advice Needed. new [Re: Mike Craig]
      #638561 - 18/07/08 02:46 PM
Quote Mike Craig.:

Ken,

I have followed your plight with interest. Your ability to track down the component in question shows your competence is greater than we initially suspected.

You can send Billion an email, to find out if a replacement transformer is available (make sure the health and safety police aren't watching ):

sales@billion.com




I was wrong. Somebody was stupid enough.


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Tui
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Re: Mackie Overheated. Advice Needed. new [Re: ken long]
      #638563 - 18/07/08 02:50 PM
Quote Ken Long:

Quote Tui:

Do you really think anybody here is going to be stupid enough to give you "advice" about how to mess around with the mains wiring of your gear?




I never asked for that. If you're not going to be helpful, probably best you refrain from posting replies. You certainly bring nothing to this thread and I don't appreciate your tone.

ken




Do you have any idea that SOS could be held liable for publishing "advice" that might be a risk to public safety? Obviously not.


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ken long



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Re: Mackie Overheated. Advice Needed. new [Re: Tui]
      #638568 - 18/07/08 02:58 PM
Quote Tui:

Quote Ken Long:

Quote Tui:

Do you really think anybody here is going to be stupid enough to give you "advice" about how to mess around with the mains wiring of your gear?




I never asked for that. If you're not going to be helpful, probably best you refrain from posting replies. You certainly bring nothing to this thread and I don't appreciate your tone.

ken




Do you have any idea that SOS could be held liable for publishing "advice" that might be a risk to public safety? Obviously not.




Is that so? Guess you haven't read their disclaimers:

YOU remain personally responsible for the content of your messages, and you agree to indemnify and hold harmless SOS Publications Limited and Infopop Corporation (the makers of UBB.threads forum software), and their agents with respect to any claim based upon transmission of your message(s).
We do not vouch for or warrant the accuracy, completeness or usefulness of any message, and are not responsible for the contents of any message. The messages express the views of the author of the message, not necessarily the views of SOS Publications or any entity associated with the SOS Forum.

However the rules do state that you shouldn't insult other people. Like calling them 'stupid' for instance.

ken

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Tui
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Re: Mackie Overheated. Advice Needed. new [Re: ken long]
      #638571 - 18/07/08 03:04 PM
A little while ago, we had a thread about grounding that was far less contentious than this one. It was locked by the mods, and rightly so.

How would you describe the act of giving potentially dangerous advice to complete strangers, over the net no less?


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Mike Craig
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Re: Mackie Overheated. Advice Needed. new [Re: ken long]
      #638575 - 18/07/08 03:10 PM
Good luck Ken.

Tui, I would never encourage anyone to service or repair electrical equipment containing lethal voltages unless they have demonstated the necessary competence.

I think my previous posts reflect this.

I can't remember the last time anyone called me "stupid", but I am certainly not going to rise to it on this occasion.

Ken, establish whether a replacement transformer is available then send me a PM - don't try and fix it yourself.

Mike.


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Tui
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Re: Mackie Overheated. Advice Needed. new [Re: Mike Craig]
      #638580 - 18/07/08 03:18 PM
Quote Mike Craig.:


Tui, I would never encourage anyone to service or repair electrical equipment containing lethal voltages unless they have demonstated the necessary competence.




You contradict yourself, since you have done just that.




Quote Mike Craig.:



I can't remember the last time anyone called me "stupid", but I am certainly not going to rise to it on this occasion.




I have no interest in insulting you, or anybody else.


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snipsnip



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Re: Mackie Overheated. Advice Needed. new [Re: ken long]
      #638622 - 18/07/08 05:01 PM
get a life tui



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ken long



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Re: Mackie Overheated. Advice Needed. new [Re: Mike Craig]
      #639774 - 22/07/08 03:33 PM
Well, Billion don't have it in stock but said they can source one for $60 including air freight - that is, assuming its all down to the transformer.

I must admit I'm rather exasperated at the prospect of losing this mixer over such a trivial issue .

Unfortunately, it appears that repairing it will end up costing more than its worth.

So I was wondering what I could do with it? eBay for parts? Any suggestions?

Thanks

ken

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James PerrettModerator



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Re: Mackie Overheated. Advice Needed. new [Re: ken long]
      #639942 - 23/07/08 07:54 AM
$60 seems a reasonable cost to me - a new mixer would set you back a fair bit more than that. The only other alternative would be to find a faulty mixer with a good transformer and make one good mixer out of two faulty ones.

Cheers

James.

--------------------
JRP Music - Audio Mastering and Restoration.
http://www.jrpmusic.net


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ken long



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Re: Mackie Overheated. Advice Needed. new [Re: James Perrett]
      #639980 - 23/07/08 10:18 AM
Hi James,

Thanks for the advice. As I said, I won't be replacing the transformer myself so will also need to add manual labour to that cost. I can see it escalating rapidly.

I will look into sourcing a faulty mixer and gutting it.

Thanks again,

ken

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Steve House



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Re: Mackie Overheated. Advice Needed. new [Re: ken long]
      #641004 - 26/07/08 09:37 PM
I came on this thread late but I find it amazing that something as simple as replacing a faulty power supply transformer should be considered an issue of public safety or a source of controversy. For crying out loud, I built my first mains-powered radio kit at age 10 and no one made a fuss about it. Ham radio operators and high school science fair contestants do it every day. What's the big deal about unsoldering a couple of wires, swapping the new transformer for the old, and redoing the solder connections? We're talking basic electronics skills, not nuclear reactor engineering. I'd certainly check the old transformer output with a multimeter to make sure that's really the problem before spending the money for a new one but aside from that, replacing it is really not any more of an arcane safety issue nor technically more complex than soldering an XLR connector to a mic cable. Why the paranoia?


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narcoman
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Re: Mackie Overheated. Advice Needed. new [Re: Tui]
      #641010 - 26/07/08 10:48 PM
Quote Tui:



I have no interest in insulting you, or anybody else.






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ken long



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Re: Mackie Overheated. Advice Needed. new [Re: Steve House]
      #641023 - 27/07/08 12:00 AM
Quote Steve House:

What's the big deal about unsoldering a couple of wires, swapping the new transformer for the old, and redoing the solder connections? We're talking basic electronics skills, not nuclear reactor engineering.




Thank you.

Quote Steve House:


I'd certainly check the old transformer output with a multimeter to make sure that's really the problem




Done did this. Thanks. It is the transformer.

Quote Steve House:

replacing it is really not any more of an arcane safety issue nor technically more complex than soldering an XLR connector to a mic cable. Why the paranoia?




I'm not sure and on a pro audio forum, it baffles me. I was very grateful for the warnings but hadn't anticipated the trolling.

FWIW, I make my own cables and I'm not looking to re-invent the wheel. Just dismantle, repair, and re assemble, switch on and get on with it.

Thanks for your input on the matter.

ken

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Tui
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Re: Mackie Overheated. Advice Needed. new [Re: ken long]
      #641052 - 27/07/08 08:12 AM
Well, that's great. So everybody with a soldering iron and a screwdriver can come here and get free advice for how to fix the mains wiring of their gear. I just needed to know that. Strange though, that a thread about grounding was considered potentially too confusing and harmful to run on this forum.


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ken long



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Re: Mackie Overheated. Advice Needed. new [Re: Tui]
      #641058 - 27/07/08 09:00 AM
Quote Tui:

Well, that's great. So everybody with a soldering iron and a screwdriver can come here and get free advice for how to fix the mains wiring of their gear. I just needed to know that.




Glad you've been enlightened.

ken

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Steve House



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Re: Mackie Overheated. Advice Needed. new [Re: Tui]
      #641103 - 27/07/08 01:04 PM
Quote Tui:

Well, that's great. So everybody with a soldering iron and a screwdriver can come here and get free advice for how to fix the mains wiring of their gear. I just needed to know that. Strange though, that a thread about grounding was considered potentially too confusing and harmful to run on this forum.




It's not like we were talking about re-engineering the device or cooking up some cockamamie modification. It's simply swapping out a faulty component and replacing it with an identical good one, using common sense and a few basic electronics skills. It requires care and paying attention to what you're doing but it isn't some exotic procedure that requires years of specialized training. If you were an engineer at a radio station or recording studio faced with a down audio desk in one of the studios due to a faulty transformer and you told the station manager you'd have to send it out for repair you'd be laughed out of the office.

I do agree with your surprise over the grounding issue thread - I don't recall the thread so can't speak to it - but I reiterate that the safety issues and skills being discussed are no different from those of every kid that ever built a ham radio station or put together a Heathkit audio amplifier or TV set (back in the day when Heath was in business).


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Tui
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Re: Mackie Overheated. Advice Needed. new [Re: Steve House]
      #641195 - 27/07/08 07:45 PM
Quote Steve House:

Quote Tui:

Well, that's great. So everybody with a soldering iron and a screwdriver can come here and get free advice for how to fix the mains wiring of their gear. I just needed to know that. Strange though, that a thread about grounding was considered potentially too confusing and harmful to run on this forum.




It's not like we were talking about re-engineering the device or cooking up some cockamamie modification. It's simply swapping out a faulty component and replacing it with an identical good one, using common sense and a few basic electronics skills. It requires care and paying attention to what you're doing but it isn't some exotic procedure that requires years of specialized training. If you were an engineer at a radio station or recording studio faced with a down audio desk in one of the studios due to a faulty transformer and you told the station manager you'd have to send it out for repair you'd be laughed out of the office.

I do agree with your surprise over the grounding issue thread - I don't recall the thread so can't speak to it - but I reiterate that the safety issues and skills being discussed are no different from those of every kid that ever built a ham radio station or put together a Heathkit audio amplifier or TV set (back in the day when Heath was in business).




I can only speak for myself, but I find it bizarre to discuss the details of replacing a mains transformer on a "Music Recording Technology" forum. Or is this also a electronics DIY forum?

To be clear, I usually make my own analogue cables, and I know how to solder. Big deal. But I find it irresponsible to trade tips about changing a transformer over the net with someone - the OP - who is clearly not versed or qualified in this field, for otherwise he wouldn't be asking so many questions. A replacement transformer might look very different from the original, it might follow a different design with different contact points for the mains and grounding leads. Replacing the transformer might require the full training of a qualified engineer. We don't know for sure, do we.

Why don't we stick to discussing the sort of wiring that hasn't got the potential to blow up in your face? When one of the mods (Hugh?) locked the grounding thread, I was half disappointed because I would have liked to learn more about it. At the same time, I realised that this forum isn't the place to get into specifics about it. There is a real possibility that someone might start to experiment with what they've read here, and make a terrible mistake. I commend the mod(s) for locking the thread.

As they say, a little knowledge is a dangerous thing.


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ken long



Joined: 21/01/08
Posts: 4493
Loc: The Orient, East London
Re: Mackie Overheated. Advice Needed. new [Re: Tui]
      #641198 - 27/07/08 08:08 PM
Quote Tui:



I can only speak for myself, but I find it bizarre to discuss the details of replacing a mains transformer on a "Music Recording Technology" forum. Or is this also a electronics DIY forum?





Yes. You only speak for yourself. And its a little tired now. I've asked you previously to refrain from posting on this thread if you have nothing useful to add.

Quote Tui:


Why don't we stick to discussing the sort of wiring that hasn't got the potential to blow up in your face? When one of the mods (Hugh?) locked the grounding thread, I was half disappointed because I would have liked to learn more about it. At the same time, I realised that this forum isn't the place to get into specifics about it. There is a real possibility that someone might start to experiment with what they've read here, and make a terrible mistake. I commend the mod(s) for locking the thread.




In case you hadn't noticed, a moderator has contributed to this thread. And positively, I might add.

Quote Tui:

As they say, a little knowledge is a dangerous thing.




Man, you really gotta lay off them Thai sticks.

ken

--------------------
I'm All Ears.


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