E-mu Emulator Sampler User Forum for the EIII EII EI and EIII XP

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

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

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

 ;D

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.

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.

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.

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. 

(http://i100.photobucket.com/albums/m18/rokuez/PSUPot.jpg)

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


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

listen to 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 :

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...

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 ??

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

ok DR C.

I wait

Have a nice day ...

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... :D

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

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 !

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 !

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

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

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 ?

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

No i've no scsi device hooked.

here is my opened EMU :

http://cjoint.com/?gjlhzEzjEG

GIVE ME 10 MINUTES...

Okay...

Most of the poeoplen, when they re-assemble an EII, put the SCSI cable wrongly, like this :

http://cjoint.com/?gjlBeOynVl (http://cjoint.com/?gjlBeOynVl)

When thay close the machine, the cable is pressed between the cpver and the card cage and the pins if the components of the cover make holes and shorts to the cable, occuring shorts.

You didn't do it ! Congratulations !
(You would not imagine what stupid things people do...)

Okay : do you have any SCSI devide attached on the EIII ?

Does it hang all the time ? At start-up, or sometimes ? When you play ?

What happens if you just leave it powered "ON", will it crash by itself ?

Is it connected on MIDI (Out, In, Thru) ?

Lots of questions, uh ?


 8)

I've no exterior SCSI device ( the only one is the hard disk inside )

It sometimes turn on without problem and sometimes no and never, at this time because i got my EMu for less than  2 weeks ,  when i play

What happens if you just leave it powered "ON", will it crash by itself ? => I didn't know because it crash directly when i turn it on

I 've connected still no midi device plugged

When i take the tension in the pin with the yellow circle , i've  + 4.96 V

http://cjoint.com/?gjl058nf53

To be ABSOLUTELY SURE : what kind of circuit is it ?

It should be normaly 5,05 V !!!

This is why I asked you since the beginning, because there is a loss on line, if you adjust it to 5,05 V, you will see at the power supply almost 6,3 V !

What do you mean by what kind of circuit ?

How can i precise it to you ? You mean the model wrote upon the circuit ?

Yes, exactly !

If it is :

SN74xxx
SN74LSxxx
SN74HCTxxx

its 5,05 V

I've CD74HCTxxxx and not SN74HTCxxx : it's the same ???
and i've another SN74ALSxxx ...

I've just adjust at  + 5,05 V but the EMU appears like before as shown in my picture ... :'(

Any idea to exit from this hell ?

Find another disk and put it there, even temporarily. You can put two sheet of paper on the old one without even moving it, (vhite and unused paper, I mean with no ink, some inks are conductive), put the other disk on top of it, plug it, no matter if there is sofware or not on it, don't worry, you don't even have to format it, its just to see !

If the display goes ok and scans disks, it means your disk is faulty.

If this disk is faulty, don't throw it away, I know how to fix it with a probability of 80%.

My EMU goes know ... it's a stranger behaviour ...
I keep your idea with a second hard disk , in case ...

Thanks a lot  for your excellent help Dr.C. ...
Our EMU are not alone in this world ... , someone, somewhere, in sometimes keeps on  watching !  ;)

PS : better is :
-  change totally the HD by another one with some giga's ?
-  or put a zip drive is a better idea ?

You will have problems with zip drive. Forget it.

Cheers

HI everybody,

Long time before i post because of the job.

I have use my EMU  a very little bit for time to time ... sometimes it worked , sometimes it crashed at the boot  ( as before , ... up in the topic ) , sometimes it crashed after a time , somtimes i read a message like "SYSTEM ERROR UND "...

I've tried , this morning , to change the HD  by another one ( just to see what happens ) like said Dr.C ... the result is that sometimes the front panel is ok ( no lights )  and sometimes it lights up ( always the same : supermode,segment,song,record,erase,prest management and digital processing )

Any idea ???

Are you absolutely sure the SCSI flat cable passes at the right place, that it is not piched between the cover and the card cage when you close the machine ?

I donn't think your machine has a breakdown, there is a bad contact somewhere.

Hello Dr C.

Yes the scsi seems not to be the problem because even if i open my emu, the problem is still the same !

I may add this  :

1° ) when i took up my PCB with the mémory , the emu boot correctly till it said something like ( i don't remember  exactly ) miss something ... of course !

2° ) so i decided to spay pcb cleaner on this board and in the memory and clean them ... this was logic  as operation

3° ) i put in my pcb and the problem is the same xith a new one... stereo outputs  don't work  when i tested the machine ! ! ! !

VERY CURIOUS ...

i just take off the pcb with memory and the display said :

check scsi , floppy,mounting board, and finally " can't load system"

So if the emu boot at this time , the problem is in the pcb with memory , isn't it ?

What do you think ?

My God....

The PCB with the memory (top one) is the microcontroler bboard and the machine will never work witout it !

Did you make a memory test ?

If you don't know : Master-8-0-1358-2

OK Dr C.

memory test  : ok

I've cleaned all of my pcboards ...

The unit works now... but i do not know if it will be stable in time .

The stereo ouputs work too => i recalibrate them + i did what you said in another topic.

Curious, very  curious beast that EIII. :-\

Pray !!!!