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Possible D8B issue?

Discussion board for Mackie's d8b Digital Console users.

Re: Possible D8B issue?

Postby Crash » Mon Jul 18, 2011 7:03 pm

Axeman098 wrote:No, I matched BIOS to Database specs, and it came right up. The Voltages DO concern me, but I guess it is time for a multimeter check to be sure. The next obvious question is, If the Meter says the voltages don't jive with what I'm seeing, THEN what? I suppose I can track down another power supply if I have to, but if the meter shows the PS in spec, then I suppose it's a sensor issue on the mb. Replacing the MB could prove problematic, as mine did not come with the appropriate Disks and ESN# paperwork (Something I did not realize at the time of sale). The board's legit because I bought it from a church, but when I went back to ask about the stuff, they couldn't locate it. (You'd think the paperwork on a $10k board would be worth keeping eh?) My board's only running v3.0 for now, but I suppose it's gonna be a long ring around the rosey with Mackie if I want to buy v5.1 legit....can't wait to see what that takes ;)


I really wouldn't worry about it if the meter says everything is groovy voltage wise. The voltage readings must be something you see with the 300Mhz processor. I have never seen these with my 166Mhz rig.

As for version 5.1 or any of the plug-ins, I am sure Mackie will be more than happy to take your money. You can get the ESN form the console on the plug in authorization page and the serial number is still on the back I would assume. All that is left is being handy with cash. As I recall (unless I am hallucinating a memory here), the price of version 5.1 has fallen dramatically.... so it is worth the upgrade.
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Re: Possible D8B issue?

Postby Axeman098 » Mon Jul 18, 2011 7:47 pm

I currently only show the Mackie FX 3.0 Build 52 to be unlocked. I see the online price for v5.1 is very reasonable. HAHA! I think the hardest part will be actually creating the floppy disks! LOL Now where did I put that old IBM ThinkCentre with the floppy drive??? lol

I will have to order memory as I have only the 166Mhz Pentium and 64Mb Ram, I would imagine the 256Mb woul make all the difference in the world for 5.1 eh? There is a setting in the BIOS to turn on the Voltage Display so it shows during POST. Mine wasn't on when I got it, but when I turned it on, the whole damn thing was Red! I dunno, guess I need to either swap out and try the ATX mod, or see about another AT PSU just to be safe. However the Temp sensors being completely whack make me think it's a MB issue. Guess I'll have to Meter it to be sure...
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Re: Possible D8B issue?

Postby Crash » Mon Jul 18, 2011 7:53 pm

Where do you see the voltage readings if you are running the old MB? Is this somewhere in the bios settings?

The memory upgrade is suggested for running 5.1.
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Re: Possible D8B issue?

Postby Axeman098 » Tue Jul 19, 2011 8:45 am

Yeah, there's a setting to enable the Voltage readings in the POST. If it's disabled, you can still see them in the regular screen in the BIOS, just not during post. What freaked me out was, I turned it on, just to see what the readings were seen as during POST, and the entire damn thing was blinking Red! It halts upon any Voltage anomoly, warns you in Red Blinking Letters, and says Press any Key to Continue.

Here's my pickle, I've had the board for a while, I don't use it regularly at the moment, because I dont have any connectivity(HDR24,ADAT, PC, etc.), but I turn it on and use it once or twice a week as I'm learning how to get around in the Mackie OS, trying to understand more about the OS and Mixer, etc. I calibrate the Faders once a month to ensure all are functional, and just generally yweak and play to ensure all seems in good working order. I don't just let it sit in a corner collecting dust. The point is, I've been using it for months with no noticable issues, so I'm skeptical of what the BIOS readings are telling me. My PC Tech experience also tells me that BIOS sensors are notoriously wrong and unreliable, particularly thermal sensors. But the damn thing IS so old, it very well could be a legit problem on the AT PSU. One would think, as scary as those Voltages look....it would have killed something by now...if not itself, then surely a console board. What's convincing me of this being a board problem are the Thermal readings. I KNOW the System Temp is completely bunk. It reads 250C (Yeah....Centigrade...no sh*t...) ALL THE TIME. Even if I just turned on the Machine. So that right there tells me SOMEthing isn't right. The CPU Temp is always at 64C. All this makes me think it's the Motherboard....but still, as old as it is, I can't completely rule out a bad PSU yet. Yet nothing seems amiss with the function of the Console.

I dunno, I'm just worrying I suppose. I got the D8B through a friend looking out for me, and got a good deal on a clean, functional, well taken care of machine. I've wanted one for years, I can actually remember drooling over it when it first came out. I intend to put it to regular use, both as a controller once Marc's project is completed, but also as a stand alone recorder. I have TONS of work to do on it, just trying to decide the best course of action as far as what and how to connect it to a PC. I'm looking at the RME RayDAT, just that's almost a Grand....eeesh! I like the MOTU 2408 mk3. This would easily handle the 24ch. of ADAT from my DIO-8's, but then my question becomes how much DAW control can I eek out between MIDI and HUI, and is it enough to make it worth the purchase? Or should I just hold out for Marc's Controller option, and just go with external Pre's? All this while wondering if my D8B is falling apart from the inside out :P LOL I'm exaggerating a bit, but that's what it feels like anyways :P Funds only go so far, and I have to figure out the best, and best affordable options for my needs. The RayDAT looks awesome, but a cool G is a lot to lay down when yer not sure if you'll have enough control of the DAW to make it worth the expenditure. Of course....24 channels of External I/O is gonna be somewhere in that range or above as well, plus the cost of Marc's Mod (whatever it ends up being, whenever it becomes available)....you see my dilema...

I know the MIDI limitation, and I can live with only 8 control assignments. What I need to understand better is the HUI control layer, and HOW MUCH I can actually control with it. I know I can use both together, and that sounds promising, but I'm not up to speed yet on the HUI, so it's making my decision process a bit difficult. At the moment I can only afford to go one way or the other, so it's critical to me that I pick the RIGHT, and reliable way to interface to the PC. I really like the MOTU, just wish I knew more about the HUI Control. I need to know, okay...if you run it this way, say...using the MOTU2408mk3 ADAT INS....THIS is what you can and cannot control by combining MIDI/HUI.
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Re: Possible D8B issue?

Postby synthjoe » Tue Jul 19, 2011 3:31 pm

There's another PSU for the +5V and +/-16V to the desk. However, +12V is also used in the desk for reading controller (V-pot and fader) values and actuator motors. So the PC PSU is most likely to kill your motherboard and 'maybe' some things in the desk, but this latter is unlikely. The other two PSU's are pretty well done, so I don't think your desk is threatened.

However, the PC PSU is more or less a generic type and those around 2000 tend to suffer from a typical electrolyte problem of the era (you can search the net for more information on this). So I'd definitively check them voltages. Damage might not be obvious because the dried out capacitor results in spikes and depending on the filtering and measuring methods very different results can be obtained - for example on the sensors and what effectifely gets to the chips. Best would be to check voltages with an oscilloscope - spikes bigger than about 0.5V and wildly swinging rail voltage indicates bad capacitors and will lead to premature death of electronics. This can also result in scary readings while the board works seemingly fine. My personal experience with board sensors is rather the opposite of yours: such values are usually precursors of PSU failure and this might also kill the motherboard in some cases. Obviously, the 250C reading might mean an unimplemented sensor or broken solder joint. CPU temperature sensors and voltage sensors tend to show useful information though, if power rails are clean - hence I suggest that a through power check is in order.
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Re: Possible D8B issue?

Postby Axeman098 » Wed Jul 20, 2011 7:26 am

Anyone know of a Diagram Reference to the AT PC PSU connector? As in which wires are what? I'd like to know what I'm hunting for with the meter.
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Re: Possible D8B issue?

Postby Crash » Wed Jul 20, 2011 4:04 pm

Axeman098 wrote:Anyone know of a Diagram Reference to the AT PC PSU connector? As in which wires are what? I'd like to know what I'm hunting for with the meter.


I used to have the pin out voltages of the big ass connector but I believe it was flushed when the mothership forum went tits up and got the redesign. I'll look for it again and see if I can locate it.

No joy... You are looking for something else anyway....doh!
Last edited by Crash on Wed Jul 20, 2011 10:22 pm, edited 1 time in total.
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Re: Possible D8B issue?

Postby synthjoe » Wed Jul 20, 2011 10:07 pm

Do I understand correctly that you're looking for this?
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Re: Possible D8B issue?

Postby Axeman098 » Thu Jul 21, 2011 10:09 am

I believe thats a good start! ;) Thanks man! I'm assuming the generic ATX/NLX 20 pin layout applies to the D8B??? Just makin sure I'm not overlooking anything odd or specific to the D8B. Looks like a standard 20 pin connector to me.
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Re: Possible D8B issue?

Postby synthjoe » Thu Jul 21, 2011 1:21 pm

I conclude you have the newer motherboard with both PSU connector types on it. It is the standard ATX, although I'm not sure whether the two connectors (ATX and old AT) are wired through 1-to-1, but you might give it a go. Another option is to disconnect the HDD power cable and measure +5V and +12V there. Vcore is difficult to check as it is regulated on the motherboard itself and getting to the regulator is usually next to impossible in operation. However, it is derived from the +5V (as the supply does not have +3.3V rail in this case), so all should be fine if your +5V is OK (unless of course the regulator caps on the motherboard have leaked as in some of the cases I have experienced. but hopefully such will not be the case for you).
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