Ever wanted to know....
Home > Home Recording Forum > Live Sound Reinforcement > Ever wanted to know....
Posted on Jun 12, 2009 09:18 pm
Rob Stemple
The Czar of BS
Member Since: Dec 31, 2007
If you have ever wanted to know what is inside a Yamaha digital console? I have the answer for you.
33 fader failed on our M7CL-48. Due to the fact of it being first generation of them. The first generation allowed the faders to move rather quickly. And the motors did not care for that too much.
End result being that I have to replace all of them with a newer style of fader.
So, here we go......
And this is how you put the master section up for service.
The input cards are in banks of 8. With the opamps and A/D's.
And then..... The dreaded CPU! The little piece that will not allow the desk to go to 96K.
Not much to it. Kind of makes you wish that they would have put just a little more features on the master section. Such as Mute Groups! Maybe the next version.
[ Back to Top ]
Noize2uCzar of MidiAdministrator
Since: Apr 04, 2002
Jun 12, 2009 10:15 pm For the kind of money they were getting for that piece I hope they are giving you some credit toward the new fader's since they did install bunk ones to begin with. And they haven't released a newer board that will do 96k yet?
Was someone bored at work today by chance?
Cool shots though, I love gadgets and gear porn.
Dematrixhttp://www.reverbnation.com/2ndgMember
Since: Nov 27, 2007
Jun 12, 2009 10:22 pm When i open something up like this, im like
"i just know im gonna **** this up."
as long as ther arent toooo many screws and parts you havent replaced, it should be all good right?
Jun 12, 2009 10:31 pm Noize, I couldn't believe it when we hooked up our BigBen to the desk and it kept yelling at us about the clock.
48K is all the M7 will do. 48K! WTF is that!
All of the other desks that they make will do 96K. The M7 is the only exception.
Deon. You have no idea of how many screws that I had to take off of this desk. And, just for added fun, they used the new RoHs solder. That just means that it has very limited toxins in the solder.
Normally, you remove solder joints at about a temp of 625 to 650 degrees Fahrenheit. This stuff...... I had to be at 825!!!!! And then, the solder wick wouldn't pick all of it up. And it goes cold in a heart beat. So, you have to be very careful not to remove the heat until you removed the wick first.
Dematrixhttp://www.reverbnation.com/2ndgMember
Since: Nov 27, 2007
Jun 12, 2009 10:44 pm Im a welder, so understand sorta where youre coming from.
ya need a soldering iron on steroids mate.
i heard the new solder, or the the stuff they use in China at least, cracks easier because of less lead in it? is this true? is this the reason everything is ******* a few months after purchase?
i have guitar pedal actually that every now and then i have to resolder cracks in.
Jun 12, 2009 10:47 pm Yup! It's very true.
And yes, it's more brittle, and does not flow at all!
Imagine trying to get your bead to flow in a spot that it just refuses to go.
Very frustrating!
Noize2uCzar of MidiAdministrator
Since: Apr 04, 2002
Jun 12, 2009 10:48 pm Rob, I've been going through the RoHs solder thing at work as well. They are going to force us to start using it as well to maintain ISO compliance which is a crock of **** if you ask me.
Jun 12, 2009 10:51 pm What temp do you have to get it?
I'm scared to death that I'm going to lift a trace at these temps!
Dematrixhttp://www.reverbnation.com/2ndgMember
Since: Nov 27, 2007
Jun 12, 2009 11:00 pm i would say they'd be using some sort of heat blast to put this stuff in. just a quick squirt so it doesnt over heat anything but solders the component in place instantly?
On the refusal to bead thing,
yeah man, i know, sometimes if im welding on say, a ship or something weird that has had power run thru it or even does,
i get something called arc blow, which basicly magnetizes everything, you cant get the weld to stick well. it kinda just pushes it away for the parent metal. a real pain in ones buttocks.
Maybe that's happening in this case? i dunno, they replaced the lead with what?? now there's a thought.
easy enough to remedy in the production stages, they got the money and resources machine wise.
the one man band at home though doesnt. good for business?
i dunno.
Jun 12, 2009 11:13 pm Well Deon, it's very much like welding in a sense.
If you have a piece that has a large mass to it, you have to heat that mass up to the melt point of the solder, or it will not bond to the metal.
And you get that lovely thing known as a cold solder joint.
And we all know the fun that comes with that!
Now, here is the real fun. While your heating up the mass and the solder pad for the PCB that your working on. The copper cladding that makes up your trace could lift off of the resin.
Once that happens. You are soooooo ******!
Now, you have to try and remove some of the green insulator that is over your traces. And try your azz off to get a lead of the component to bond with what is left of your trace.
Dematrixhttp://www.reverbnation.com/2ndgMember
Since: Nov 27, 2007
Jun 12, 2009 11:36 pm yeah man, its sounds pretty touchy, and i know whatyou mean, ive done it with guitar vol knobs and putting too much heat into it and ******* up the insides of it.
only because it takes so long to heat up the solder, "and the parent metal."
all im saying is, whatever they did to the makeup of the original solder mix, its alot harder now to make it work.
me being a conspiracy theorist somewhat, is it just "more" bad luck on our part its like this now?
maybe they dont wanna use lead now coz its bad for you, but there are other mixes out there that have to be easier to use,
that we can use our old stlye soldering iron's on?
If youre into the share market, keep an eye out for a new type of soldering iron on steroids that can solder this stuff easy.
you'll be a millionare in no time. ha ha ha ha
Noize2uCzar of MidiAdministrator
Since: Apr 04, 2002
Jun 13, 2009 02:59 pm Rob, I've been trying to stay under 810. But that seems to be the lowest limit for lighter piece and component's. Lord help you though if you have to do say a twisted pair of 18 ga 17 strand or so. Then I've been heading to 830 or so. but it completely wrecks tip's so far from what I have seen.
