emu iii CRASH

[ARES]

Hello ,

I've a problem  : the EIII would just lock up , but sometimes the EMU crash and the screen showed junk characters and a random number of led's on the front panel would be active.  I saw a topic in the forum about the problem and i've opened the EMU... but  where is the adjustable on the power supply
Somebody can put a picture of it  on the forum ?

By the way , can i change the PS of the emu by another like PS from a computer ... in fact i do not see why this  would be impossible .

Any ideas.

By the way , certains sur le forum parlent-ils français ??

Best regards , Ares

[dr.c]

Stop messing with the power supply !
Arrête de faire le con avec l'alimentation, toi, là !!!!      Ziva !

What all you fucking maniacs have by messing around with power supplies, boards, etc.... ?

 

Okay....
I've got NO picture of the power supply, wich shows the adjustable.

I would need as well a pic of card carge with the boards in it.

Otherways, and at your own risk : to measure the +5V, since you want it so much, put a probe on the card cage ("golden") and the other on one of the PIN 16 of a 16 pin
IC (not an analog one, and some even digital, the +5V is not on pin 46), or pin 14, or pin 28 for an Eprom.
If the relay on the output card is not cliking, this means that the 5V is okay.
Well, at least... verify

Don't ever pass over 5.1V !

The adjustment on the PSU is an adjustable resistor. But, as we say in french "Chacun sa merde" (Evryone his own shit) and if you don't feel secure, d'ont mess around.
The silver colour metal cage on the power supply is on LETHAL voltages, EVEN IS THE MACHINE IS SHUT DOWN. IT MUST BE UNPLUGGED FROM THE MAINS, TOTALLY !

I would recommend at first to shake the emu, bend it upwards, downwards, put it head down to see (or hear) if there are no nuts, screws, guns... hiding inside, occuring little shorts.

Is this machine plugged into MIDI gear ? If yes, unplug it.

[ARES]

oK, merci pour la réponse ...

Ceci dit , je ne comprends rien à tes termes techniques, malheureusement... Peux-tu être plus clair ?

Je n'ai pas froid aux yeux si on m'explique ce que je dois faire ...

Allez, laisse -moi sentir la puissance de cette machine que je viens de recevoir, ...il y  a quelques jours.

[dr.c]

This is a forum, wich means its for everyone.

If you don't understand the technical terms I used, don't try to even THINK about putting your hands inside.

Sorry about that.

[rokuez]

Ares here is an image with a red circle around the pot used to calibrate the PSU, show this to your tech if he can't find it. 



Here is a thread to show your tech about calibrating the PSU


http://eiiiforum.com/index.php?topic=8.0

listen to dr. c!

[dr.c]

DON'T DO THIS !!!! THIS THREAD IS A PIECE OF SHIT !!!!!!!
I NEVER SAID IT WAS FOR THE +12V !
THE TRIMPOT ONLY ADJUSTS THE + 5VOLT !!!!  
IF YOU DO THIS, YOU BURN ALL THE BOARDS !!!!!!!!


Okay... all this is FALSE :

Solution: cleaning the trimpot on the power supply PCB and adjusting the voltage to the correct level (+12 V).
There's only 1 trimpot on the power supply so you can't go wrong.
I suggest you disconnect everything from the power supply, except the fans and/or the hard disk, when you adjust the voltage. Otherwise you migth fry something when the voltage peaks.
I used one of the fan connectors to read out the voltages.

One shoud NEVER start a switching power supply witout a load (it's outputs feeding equipment), you may blow the power supply, the equipment, your head...

You can disconnect a power supply but you must put a load. For example, for the 5V, to have an output of 1A, you must have a 5 Ohms resistor between the +5V and the 0V. I said 0V, not the ground ! Since its +5V at 1A, it will dissipate 5 Watts, so, take a 5 Ohms, non coiled, 10W resistor, to have a margin.
I am preparing a table allowing you to convert directly a 5V 10W resistor to a lightbulb wich will be easier to find !!!

For now, just keep the machine as it is, and don't mess with it.
Just a bit of patience...

[ARES]

hi DR.C,

let me know , the thread is correct or not at the end ...
If not what must i do for my poor EMu who wants to come back to life ??

[ARES]

And by the way , thanks a lot to Rokuez for his picture...

[ARES]

ok DR C.

I wait

Have a nice day ...

[ARES]

OK men ,

I couldn't wait until Dr C. ...

So i adjust the PS till 5.05 V and now my EMU boot up without problem...

In fact, this processus is very easy and no need to be afraid by ... technical terms.  

The forum is for everyone as said Dr C. , so it would be easier for everyone to understand common words, isn't ? 

See you soon !

[dr.c]

I wrote as well that the trimpot adjusts ONLY the +5V, ok ?

YOU wrote that you didn't get it, technical terms, and I was affraid that you would damage your machine.

Where did you pick the +5V to measure it ? This is very important !

[ARES]

Hi Dr. C.

My EMU crash again ...

Tell me how to insert pictures in the forum , so i could show you what i see on my machine and what i've done to adjust the trimpot at 5 V .

Read you soon

[dr.c]

You can drop your pictures at an FTP (for example) :

http://cjoint.com/

and then, when you write your next message, put the adress here

I tought it would crash again but I didn't want to appear like "the great know knows everything", you know what I mean...

Cheers

[ARES]

Hi Dr C.

Here is what i see when i turn on my  EMU

http://cjoint.com/?gjkX6eat3u

And here the picture where i take the 5 V

http://cjoint.com/?gjkZiXyIgd

So the is a difference between the voltage  :

in the mollex connector , i've 5 V ... but in the mollex connector from the PS ( 14 pins i think ) i've 5,04 V ...?
Is it normal ?

[dr.c]

Do you have any SCSI device hooked to this machine.

URGENT : make a picture of your opened machine, to see it completely. I think I may have an horror vision ...

The plavce to pick the +5V is false. It must be taken on a pin of an integrated circuit on the top board, pin 28 of an Eprom, pin 16 or 14 of another circuit.

BE CAREFULL !!!!

First, put the picture of the E3 complete