Emu XL-7 & MP-7 User's Group

THANKS for your answers.
You are right, there is no brown wire. 
What did i want to say is this, on the pins coming from the electric source there is 9 volt on first(yellow) and last but one(purple). 
Ok, i attach a image from the connector. On the rest of the pins there is nothing.
.
 /see you later



--- On Sat, 11/13/10, Matt <somatt@...> wrote:

From: Matt <somatt@...>
Subject: Re: [xl7] Re: my XL-7 does't start anymore !!!
To: xl7@yahoogroups.com
Date: Saturday, November 13, 2010, 1:36 PM







 



  


    
      
      
      New power supplies and new main boards are avail at epr. 
On Nov 13, 2010 1:33 PM, "Jack Pratt" <woodsworth1@...> wrote:
















 



  


    
      
      
      Fuse?

My XL7 doesn't have a fuse. Unless there's one inside the power supply enclosure (which I would doubt due to its inaccessibility - there might be a polyswitch ["ptc device" or "resettable (thermal) fuse"]). And there's no brown and/or yellow wires.


It has a 10-way single-in-line (molex type) connector on the main board [with 10 wires coming from the power supply] and next to the connector (on the main board) there's a list of the voltage on each pin [+15, -15, GND, GND, +5V, +5V, +3.3, +3.3 and two others]. Although there are individual wires from the power supply to this connector there are no brown and/or yellow wires as it turns out [purple, green, black red, orange...]


It may be that you have a different variant XL7 than I have but I would be surprised if
 there were multiple revisions of the XL7 main board so radically different. 

In any case I would surmise that the most-likely problem is that your power supply gave up and possibly the main board could have been damaged in the death of the power supply. There is no value in turning the power on and risking further damage to the main board. If you disconnect the power supply (from the main board) you could check the no-load voltage on the power supply connector and check what happens under load [if you put a 1K resistor across any two wires the voltage should change not at all if the power supply is working properly, even a 10ohm resistor should have little effect (except perhaps on the +15 and -15 sources which would be unlikely to sustain 1.5A) if applied for a _very_ short time]


Solution:

If you can verify that the power supply is defunct then get a new one [although if you were sufficiently skilled in electronics you might be
 able to fix it], but the main board may also have suffered damage. The 'new' power supply will probably have the same source as the 'new' main board - ebay.


From: Dacian <dacian_victor@...>

To: xl7@yahoogroups.com
Sent: Sun, November 14, 2010 12:05:23 AM
Subject: [xl7] Re: my XL-7 does't start anymore !!!


 


ohh man, i think is kind of bad.
I just had a friend with a multimeter, and. The fuse is ok. An...