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

I have read a few threads about power supply problems....my unit is not 
switching on at all...checked internal fuse, and thats okay....I rarely 
use the standby switch so I doubt that anythings overheated (240volts 
won't be helping though)....I just wonder how the standby switch 
actually works? Is there a known issue with this standbye switch? I've 
tried re-seating everything internally that could have come loose but 
no joy...we were just about to book our first gig in 6 months, and our 
set is based around trax we've written on our XL7.....Please 
heeelllpppp!!!

Not 100% sure how the standby switch tie's in the the PSU but there 
will be a sense line on the PSU somewhere that detects when it needs to 
power up and down.
In fact the standby must be a part of the XL's hardware and firmware or 
you wouldnt get the "powering down in xx" time in the LCD.
So when in standby the PSU must be working you see?
A bit like your PC when you turn it off but its still got live mains on 
it and theres still some voltages left on the motherboard.
If your 100% convinced that it is the PSU there is a link to a supplier 
on a thread further back, someone managed to get hold of one.
Im sure the old one could be repaired, id have go. I do electronics for 
living.
Another thing is that a lot of people including myself run the XL's on 
110v with a 240v to 110v transformer.
It runs alot coolier that way :o)
Hope that helps
Gonz


--- In xl7@yahoogroups.com, "tonyhoneyford" <honeyford@...> wrote:
>
> I have read a few threads about power supply problems....my unit is 
not 
> switching on at all...checked internal fuse, and thats okay....I 
rarely 
> use the standby switch so I doubt that anythings overheated (240volts 
> won't be helping though)....I just wonder how the standby switch 
> actually works? Is there a known issue with this standbye switch? 
I've 
> tried re-seating everything internally that could have come loose but 
> no joy...we were just about to book our first gig in 6 months, and 
our 

> set is based around trax we've written on our XL7.....Please 
> heeelllpppp!!!
>

Thanks Gonz....
Is the psu the bit inside with a grey cage around it? I'm a carpenter 
by trade and I know JS about electronics....If I had a circuit tester 
I could at least see if the thing is somehow stuck in standbye 
mode....but for that to be the case the psu must be okay...is that 
what you mean?...I could maybe borrow a circuit tester...would that 
help me source the problem? is this common psu fault easy to 
repair....I know someone else who repairs TVs etc...maybe they could 
do it? I know I'm rambling on here but there aint an emu repair 
centre this side of the ocean (that I know of!)and our whole show is 
now stopped dead in its tracks--- In 
xl7@yahoogroups.com, "gonzinigonz" <gonzini@...> wrote:
>
> Not 100% sure how the standby switch tie's in the the PSU but there 
> will be a sense line on the PSU somewhere that detects when it 
needs to 
> power up and down.
> In fact the standby must be a part of the XL's hardware and 
firmware or 
> you wouldnt get the "powering down in xx" time in the LCD.
> So when in standby the PSU must be working you see?
> A bit like your PC when you turn it off but its still got live 
mains on 
> it and theres still some voltages left on the motherboard.
> If your 100% convinced that it is the PSU there is a link to a 
supplier 
> on a thread further back, someone managed to get hold of one.
> Im sure the old one could be repaired, id have go. I do electronics 
for 
> living.
> Another thing is that a lot of people including myself run the XL's 
on 
> 110v with a 240v to 110v transformer.
> It runs alot coolier that way :o)
> Hope that helps
> Gonz
> 
> 
> --- In xl7@yahoogroups.com, "tonyhoneyford" <honeyford@> wrote:
> >
> > I have read a few threads about power supply problems....my unit 
is 
> not 
> > switching on at all...checked internal fuse, and thats okay....I 
> rarely 
> > use the standby switch so I doubt that anythings overheated 
(240volts 
> > won't be helping though)....I just wonder how the standby switch 
> > actually works? Is there a known issue with this standbye switch? 
> I've 
> > tried re-seating everything internally that could have come loose 
but 
> > no joy...we were just about to book our first gig in 6 months, 
and 

> our 
> > set is based around trax we've written on our XL7.....Please 
> > heeelllpppp!!!
> >
>

Thanks Gonz....
Is the psu the bit inside with a grey cage around it? I'm a carpenter 
by trade and I know JS about electronics....If I had a circuit tester 
I could at least see if the thing is somehow stuck in standbye 
mode....but for that to be the case the psu must be okay...is that 
what you mean?...I could maybe borrow a circuit tester...would that 
help me source the problem? is this common psu fault easy to 
repair....I know someone else who repairs TVs etc...maybe they could 
do it? I know I'm rambling on here but there aint an emu repair 
centre this side of the ocean (that I know of!)and our whole show is 
now stopped dead in its tracks--- In 
xl7@yahoogroups.com, "gonzinigonz" <gonzini@...> wrote:
>
> Not 100% sure how the standby switch tie's in the the PSU but there 
> will be a sense line on the PSU somewhere that detects when it 
needs to 
> power up and down.
> In fact the standby must be a part of the XL's hardware and 
firmware or 
> you wouldnt get the "powering down in xx" time in the LCD.
> So when in standby the PSU must be working you see?
> A bit like your PC when you turn it off but its still got live 
mains on 
> it and theres still some voltages left on the motherboard.
> If your 100% convinced that it is the PSU there is a link to a 
supplier 
> on a thread further back, someone managed to get hold of one.
> Im sure the old one could be repaired, id have go. I do electronics 
for 
> living.
> Another thing is that a lot of people including myself run the XL's 
on 
> 110v with a 240v to 110v transformer.
> It runs alot coolier that way :o)
> Hope that helps
> Gonz
> 
> 
> --- In xl7@yahoogroups.com, "tonyhoneyford" <honeyford@> wrote:
> >
> > I have read a few threads about power supply problems....my unit 
is 
> not 
> > switching on at all...checked internal fuse, and thats okay....I 
> rarely 
> > use the standby switch so I doubt that anythings overheated 
(240volts 
> > won't be helping though)....I just wonder how the standby switch 
> > actually works? Is there a known issue with this standbye switch? 
> I've 
> > tried re-seating everything internally that could have come loose 
but 
> > no joy...we were just about to book our first gig in 6 months, 
and 

> our 
> > set is based around trax we've written on our XL7.....Please 
> > heeelllpppp!!!
> >
>

--- In xl7@yahoogroups.com, "tonyhoneyford" <honeyford@...> wrote:
>
> Thanks Gonz....
> Is the psu the bit inside with a grey cage around it? I'm a carpenter 
> by trade and I know JS about electronics....

Yes

>If I had a circuit tester 
> I could at least see if the thing is somehow stuck in standbye 
> mode....but for that to be the case the psu must be okay...is that 
> what you mean?...

Hummm.. to a point i guess. You could certainly test for any voltages 
on the supply rails that are present.
Dont think anyones got any schematics for the xl so where a bit in the 
dark about that one..
The only other way is to get the model No. of the PSU, track down that 
company that sells them and try to get some tech data for the supply.
That should help no end.

>I could maybe borrow a circuit tester...would that 
> help me source the problem? 

As long as you know what your doing with it and know where to look!

>is this common psu fault easy to repair....

Not done one myself, but i dont think it will be anything to major.
There are a few classic problems with SMPS (The PSU) 

>I know someone else who repairs TVs etc...maybe they could 
> do it? I know

Might well be able to. Theres SMPS's in TV's these days, if he knows 
those he shouldnt have to much difficulty in fault finding the XL's PSU.

>I'm rambling on here but there aint an emu repair 
> centre this side of the ocean (that I know of!)and our whole show is 
> now stopped dead in its tracks

There are a few synth repair places about, proberly a few in london and 
i know of 1 up north.
If your near Portsmouth area, southcoast i could have a look for you.

Sorry for asking something obvious, but is the power switch on the back of the unit (next to the power cord) on ?

I remember myself trying to figure out why the front button was not working when the back switch went off inadvertently....

Bob
El Segundo, CA

  ----- Original Message ----- 
  From: tonyhoneyford 
  To: xl7@yahoogroups.com 
  Sent: Saturday, September 09, 2006 6:49 AM
  Subject: [xl7] Re: My XL7 won't power up


  Thanks Gonz....
  Is the psu the bit inside with a grey cage around it? I'm a carpenter 
  by trade and I know JS about electronics....If I had a circuit tester 
  I could at least see if the thing is somehow stuck in standbye 
  mode....but for that to be the case the psu must be okay...is that 
  what you mean?...I could maybe borrow a circuit tester...would that 
  help me source the problem? is this common psu fault easy to 
  repair....I know someone else who repairs TVs etc...maybe they could 
  do it? I know I'm rambling on here but there aint an emu repair 
  centre this side of the ocean (that I know of!)and our whole show is 
  now stopped dead in its tracks--- In 
  xl7@yahoogroups.com, "gonzinigonz" <gonzini@...> wrote:
  >
  > Not 100% sure how the standby switch tie's in the the PSU but there 
  > will be a sense line on the PSU somewhere that detects when it 
  needs to 
  > power up and down.
  > In fact the standby must be a part of the XL's hardware and 
  firmware or 
  > you wouldnt get the "powering down in xx" time in the LCD.
  > So when in standby the PSU must be working you see?
  > A bit like your PC when you turn it off but its still got live 
  mains on 
  > it and theres still some voltages left on the motherboard.
  > If your 100% convinced that it is the PSU there is a link to a 
  supplier 
  > on a thread further back, someone managed to get hold of one.
  > Im sure the old one could be repaired, id have go. I do electronics 
  for 
  > living.
  > Another thing is that a lot of people including myself run the XL's 
  on 
  > 110v with a 240v to 110v transformer.
  > It runs alot coolier that way :o)
  > Hope that helps
  > Gonz
  > 
  > 
  > --- In xl7@yahoogroups.com, "tonyhoneyford" <honeyford@> wrote:
  > >
  > > I have read a few threads about power supply problems....my unit 
  is 
  > not 
  > > switching on at all...checked internal fuse, and thats okay....I 
  > rarely 
  > > use the standby switch so I doubt that anythings overheated 
  (240volts 
  > > won't be helping though)....I just wonder how the standby switch 
  > > actually works? Is there a known issue with this standbye switch? 
  > I've 
  > > tried re-seating everything internally that could have come loose 
  but 
  > > no joy...we were just about to book our first gig in 6 months, 
  and 
  > our 
  > > set is based around trax we've written on our XL7.....Please 
  > > heeelllpppp!!!
  > >
  >



   

[Non-text portions of this message have been removed]

Good call! try to never forget the obvious, it does happen all the 
time..
Can you remember where that message regarding the source of spare PSU's?
Gonz



--- In xl7@yahoogroups.com, "Bob S." <tttsystems@...> wrote:
>
> Sorry for asking something obvious, but is the power switch on the 
back of the unit (next to the power cord) on ?
> 
> I remember myself trying to figure out why the front button was not 
working when the back switch went off inadvertently....

> 
> Bob
> El Segundo, CA

--- In xl7@yahoogroups.com, "Bob S." <tttsystems@...> wrote:
>don't apologise...but yes its switched on.... 
> Sorry for asking something obvious, but is the power switch on the 
back of the unit (next to the power cord) on ?
> 
> I remember myself trying to figure out why the front button was not 
working when the back switch went off inadvertently....
> 
> Bob
> El Segundo, CA
> 
> 
> 
>   ----- Original Message ----- 
>   From: tonyhoneyford 
>   To: xl7@yahoogroups.com 
>   Sent: Saturday, September 09, 2006 6:49 AM
>   Subject: [xl7] Re: My XL7 won't power up
> 
> 
>   Thanks Gonz....
>   Is the psu the bit inside with a grey cage around it? I'm a 
carpenter 
>   by trade and I know JS about electronics....If I had a circuit 
tester 
>   I could at least see if the thing is somehow stuck in standbye 
>   mode....but for that to be the case the psu must be okay...is 
that 
>   what you mean?...I could maybe borrow a circuit tester...would 
that 
>   help me source the problem? is this common psu fault easy to 
>   repair....I know someone else who repairs TVs etc...maybe they 
could 
>   do it? I know I'm rambling on here but there aint an emu repair 
>   centre this side of the ocean (that I know of!)and our whole show 
is 
>   now stopped dead in its tracks--- In 
>   xl7@yahoogroups.com, "gonzinigonz" <gonzini@> wrote:
>   >
>   > Not 100% sure how the standby switch tie's in the the PSU but 
there 
>   > will be a sense line on the PSU somewhere that detects when it 
>   needs to 
>   > power up and down.
>   > In fact the standby must be a part of the XL's hardware and 
>   firmware or 
>   > you wouldnt get the "powering down in xx" time in the LCD.
>   > So when in standby the PSU must be working you see?
>   > A bit like your PC when you turn it off but its still got live 
>   mains on 
>   > it and theres still some voltages left on the motherboard.
>   > If your 100% convinced that it is the PSU there is a link to a 
>   supplier 
>   > on a thread further back, someone managed to get hold of one.
>   > Im sure the old one could be repaired, id have go. I do 
electronics 
>   for 
>   > living.
>   > Another thing is that a lot of people including myself run the 
XL's 
>   on 
>   > 110v with a 240v to 110v transformer.
>   > It runs alot coolier that way :o)
>   > Hope that helps
>   > Gonz
>   > 
>   > 
>   > --- In xl7@yahoogroups.com, "tonyhoneyford" <honeyford@> wrote:
>   > >
>   > > I have read a few threads about power supply problems....my 
unit 
>   is 
>   > not 
>   > > switching on at all...checked internal fuse, and thats 
okay....I 
>   > rarely 
>   > > use the standby switch so I doubt that anythings overheated 
>   (240volts 
>   > > won't be helping though)....I just wonder how the standby 
switch 
>   > > actually works? Is there a known issue with this standbye 
switch? 
>   > I've 
>   > > tried re-seating everything internally that could have come 
loose 
>   but 
>   > > no joy...we were just about to book our first gig in 6 
months, 

>   and 
>   > our 
>   > > set is based around trax we've written on our XL7.....Please 
>   > > heeelllpppp!!!
>   > >
>   >
> 
> 
> 
>    
> 
> [Non-text portions of this message have been removed]
>

--- In xl7@yahoogroups.com, "gonzinigonz" <gonzini@...> wrote:

Hi gonz....sifted through the messages and found one that said the 
psu was mentioned in audiofanzine as being manufactured by a firm 
called powdec ref.CMG9-01

Thanks again for your help and advice here.....its sites like this 
and people like you that make me realize the world really is a good 
place full of basically good people..........(hang on ....while I get 
my hanky) 

Cheers

toe
>
> Good call! try to never forget the obvious, it does happen all the 
> time..
> Can you remember where that message regarding the source of spare 
PSU's?
> Gonz
> 
> 
> 
> --- In xl7@yahoogroups.com, "Bob S." <tttsystems@> wrote:
> >
> > Sorry for asking something obvious, but is the power switch on 
the 
> back of the unit (next to the power cord) on ?
> > 
> > I remember myself trying to figure out why the front button was 
not 

> working when the back switch went off inadvertently....
> > 
> > Bob
> > El Segundo, CA
>

--- In xl7@yahoogroups.com, "gonzinigonz" <gonzini@...> wrote:
>
Been on powdecs website and discovered there is no cmg9-01-c.....but 
there is a pte43-xx-c (this was referenced in the audiofanzine 
message thread)...this unit is identical in size...but has only 6 out 
pins instead of the 10 on my unit....also, some of the vents have 
been covered with a thin plastic screen.....i aint a scientist, but 
why would you design a cover with ventilation gaps and then cover 
them up? ...maybe when they did the 240v switch unit for the uk 
market it buzzed or something, so they maybe covered the vents with a 
screen (the screen covers just the wire coil thingys 
(transformers?..) which woulde make sense....of course they must have 
known that this covering of the vents would probably shorten the 
working life of the unit from 100,000 hrs to say 10% of that.. 
Anyway, I am hoping that the 6 pin version (pte 43-xx-c) will still 
work (surely not connecting the standbye pins will mean that only the 
proper on/off switches will turn it on/off?)...

what do you think of all this...

Toe

 Good call! try to never forget the obvious, it does happen all the 
> time..
> Can you remember where that message regarding the source of spare 
PSU's?
> Gonz
> 
> 
> 
> --- In xl7@yahoogroups.com, "Bob S." <tttsystems@> wrote:
> >
> > Sorry for asking something obvious, but is the power switch on 
the 
> back of the unit (next to the power cord) on ?
> > 
> > I remember myself trying to figure out why the front button was 
not 

> working when the back switch went off inadvertently....
> > 
> > Bob
> > El Segundo, CA
>

Im looking into now. Ive just opened up my XL and will meter a few 
things to see what happens.
Quick look at those other SMPS's on powerdecs site arnt the same 
after all.
Theirs seem to be triple rail type so hence the less cables..
The XL has got 4 :-

    3.3v
      5v
    +15v
    -15v 

And 2 other lines that do the remote power up/down.
This has more incommon with a ATX PC supply at the moment. (now 
theres an idea..)
l'll get my scope on there and try to reveal once and for all the 
mystery of the PSU... 
Gonz



--- In xl7@yahoogroups.com, "tonyhoneyford" <honeyford@...> wrote:
>
> --- In xl7@yahoogroups.com, "gonzinigonz" <gonzini@> wrote:
> >
> Been on powdecs website and discovered there is no cmg9-01-
c.....but 
> there is a pte43-xx-c (this was referenced in the audiofanzine 
> message thread)...this unit is identical in size...but has only 6 
out 
> pins instead of the 10 on my unit....also, some of the vents have 
> been covered with a thin plastic screen.....i aint a scientist, but 
> why would you design a cover with ventilation gaps and then cover 
> them up? ...maybe when they did the 240v switch unit for the uk 
> market it buzzed or something, so they maybe covered the vents with 
a 
> screen (the screen covers just the wire coil thingys 
> (transformers?..) which woulde make sense....of course they must 
have 
> known that this covering of the vents would probably shorten the 
> working life of the unit from 100,000 hrs to say 10% of that.. 
> Anyway, I am hoping that the 6 pin version (pte 43-xx-c) will still 
> work (surely not connecting the standbye pins will mean that only 
the 

> proper on/off switches will turn it on/off?)...
> 
> what do you think of all this...
> 
> Toe

Ok ive had a look.
Nothing that strange about it at all. Theres nothing ive seen on 
powdec's web site thats close to this though.
I've just sent them an email, see what comes back next week...
There is something you can do Tony.
If you can get hold of a multitester you can check some things.
Set it on a suitable range to measure 12v DC VOLTS.
Connect the black ( - , com) to one of the black wires.
This is ground. You could also connect to some bare metal on the 
casing, this is ground as well.
Then meter the purple wire. You should see +10vdc on it with mains 
connected.
This is the wire that always supplies the board, regardless of the 
power switch on the front panel.
If you see 10vdc thats good :o)
Now meter the green wire. This is the switching line. I measured 
around  ~ 2vdc here when the unit was powered down (in standby)
Then if you press the front power switch it drops to near 0vdc.
(this is how the PSU switches on. If you ground this line it should 
fire up)
If this is happening and it stays low then meter the other cables.
The voltages are screen printed to the side of the connector on the 
PCB.
So:- Pins 3,4,5,6,9,10 (7 & 8 being ground)

Pin 1        PWM on/off Active Low - Green 
Pin 2        +10v Always on        - Purple
Pin 3 & 4    +3.3v / 3A            - Orange
Pin 5 & 6    +5v / 2A              - Red
Pin 7 & 8    GND                   - Black
Pin 9        -12v / 0.4A           - Blue
Pin 10       +12v / 0.6A           - Yellow

Obviously be carefull while your doing all this. Dont let anything 
short out or touch the metal case work by accident. 
Let us know how you get on.
Cheers
Gonz


Model No. CMG9-01

100-240VAC 0.85A

H04615
E158470

www.powdec.com

Gonz, you're a rockstar.

I believe Powdec was the OEM, so if you can get a matching unit from them, it'd be what originally was in your XL-7.

-Aaron

gonzinigonz <gonzini@...> wrote: Ok ive had a look.
Nothing that strange about it at all. Theres nothing ive seen on 
powdec's web site thats close to this though.
I've just sent them an email, see what comes back next week...
There is something you can do Tony.
If you can get hold of a multitester you can check some things.
Set it on a suitable range to measure 12v DC VOLTS.
Connect the black ( - , com) to one of the black wires.
This is ground. You could also connect to some bare metal on the 
casing, this is ground as well.
Then meter the purple wire. You should see +10vdc on it with mains 
connected.
This is the wire that always supplies the board, regardless of the 
power switch on the front panel.
If you see 10vdc thats good :o)
Now meter the green wire. This is the switching line. I measured 
around  ~ 2vdc here when the unit was powered down (in standby)
Then if you press the front power switch it drops to near 0vdc.
(this is how the PSU switches on. If you ground this line it should 
fire up)
If this is happening and it stays low then meter the other cables.
The voltages are screen printed to the side of the connector on the 
PCB.
So:- Pins 3,4,5,6,9,10 (7 & 8 being ground)

Pin 1        PWM on/off Active Low - Green 
Pin 2        +10v Always on        - Purple
Pin 3 & 4    +3.3v / 3A            - Orange
Pin 5 & 6    +5v / 2A              - Red
Pin 7 & 8    GND                   - Black
Pin 9        -12v / 0.4A           - Blue
Pin 10       +12v / 0.6A           - Yellow

Obviously be carefull while your doing all this. Dont let anything 
short out or touch the metal case work by accident. 
Let us know how you get on.
Cheers
Gonz


Model No. CMG9-01

100-240VAC 0.85A

H04615
E158470

www.powdec.com








 
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[Non-text portions of this message have been removed]

Hi gonz...

the website is a bit ambiguouis.....if you go to the home page, then 
click on the tab for the lowest voltage internal PSUs ...you will 
find a PTE43-??-c, and this is the one that is referred to in the 
audio fanzine magazine....and though it is only 6pin output...its 
dimensions exactly match the psu in my xl7 & it looks 
identical....surely this is the replacement psu for the faulty one? 
or is this what they used in the later comand stations.....did they 
somehow change the circuitry for the standbye mode? why does the emu 
psu have so many different voltage outputs anyway....no wonder they 
never used a wall wart transformer thingamajiggy....

 I will mail you a photo of the psu showing what I think are 
symptomns of minor meltdown/overheat....



--- In xl7@yahoogroups.com, "gonzinigonz" <gonzini@...> wrote:

>

> Ok ive had a look.
> Nothing that strange about it at all. Theres nothing ive seen on 
> powdec's web site thats close to this though.
> I've just sent them an email, see what comes back next week...
> There is something you can do Tony.
> If you can get hold of a multitester you can check some things.
> Set it on a suitable range to measure 12v DC VOLTS.
> Connect the black ( - , com) to one of the black wires.
> This is ground. You could also connect to some bare metal on the 
> casing, this is ground as well.
> Then meter the purple wire. You should see +10vdc on it with mains 
> connected.
> This is the wire that always supplies the board, regardless of the 
> power switch on the front panel.
> If you see 10vdc thats good :o)
> Now meter the green wire. This is the switching line. I measured 
> around  ~ 2vdc here when the unit was powered down (in standby)
> Then if you press the front power switch it drops to near 0vdc.
> (this is how the PSU switches on. If you ground this line it should 
> fire up)
> If this is happening and it stays low then meter the other cables.
> The voltages are screen printed to the side of the connector on the 
> PCB.
> So:- Pins 3,4,5,6,9,10 (7 & 8 being ground)
> 
> Pin 1        PWM on/off Active Low - Green 
> Pin 2        +10v Always on        - Purple
> Pin 3 & 4    +3.3v / 3A            - Orange
> Pin 5 & 6    +5v / 2A              - Red
> Pin 7 & 8    GND                   - Black
> Pin 9        -12v / 0.4A           - Blue
> Pin 10       +12v / 0.6A           - Yellow
> 
> Obviously be carefull while your doing all this. Dont let anything 
> short out or touch the metal case work by accident. 
> Let us know how you get on.
> Cheers
> Gonz
> 
> 
> Model No. CMG9-01
> 
> 100-240VAC 0.85A
> 
> H04615
> E158470
> 
> www.powdec.com
>

> the website is a bit ambiguouis.....if you go to the home page, 
then 
> click on the tab for the lowest voltage internal PSUs ...you will 
> find a PTE43-??-c, and this is the one that is referred to in the 
> audio fanzine magazine....and though it is only 6pin output...its 
> dimensions exactly match the psu in my xl7 & it looks 
> identical....

Looks can be deceiving

>surely this is the replacement psu for the faulty one?

Nop.. only a tripple rail not a quad :o( ( 5 if you include the 
constant 10v rail..)
Also dosent supply enough current (or not to the same spec)as the 
original
 
> or is this what they used in the later comand stations.....did they 
> somehow change the circuitry for the standbye mode?

Wouldnt of thought so, i think its just a differant model that 
someone on the audio fanzine site decided that was the one because it 
looked the same.. which ain't! (though its in the same case and IEC 
connection and power switch are the same)

> why does the emu 
> psu have so many different voltage outputs anyway....no wonder they 
> never used a wall wart transformer thingamajiggy....

These are the voltage rails it needs to work, thats the way it is.
3.3v and +5v for logic, ram, DSP, CPU, LCD etc
+/- 12 for the analogue audio stuff (and the 12v gooseneck lamp on 
the front!)
 
>  I will mail you a photo of the psu showing what I think are 
> symptomns of minor meltdown/overheat....

Please do, high res photos good. upto say 6mb fine.
You've got the email.

Cheers
Gonz

Lets see what comes back from the email..
I asked them for service data as well.. 


--- In xl7@yahoogroups.com, Aaron Eppolito <synthesis77@...> wrote:
>
> Gonz, you're a rockstar.
> 
> I believe Powdec was the OEM, so if you can get a matching unit from 
them, it'd be what originally was in your XL-7.
> 
> -Aaron

Hya gonz
it seems my sony digital camera won't do close ups....so no 
photo's....anyways I might be wrong about the minor meltdown...its 
just that one of the round black (tin can shaped) module type 
duberries thats wrapped in rubber has a gap in the top like its 
swelled up, and the yellow tape around the transformer coils seems 
like its a bit too crinkly (due to overheating?) but obviously this 
is all supposition.......I recently changed a fuse in my boilers' 
circuit board and discovered it had a secondary fuse on the board 
(encased in a black module type of thing)......surely there might be 
a secondary fuse on the psu board??? I do not think I want to go down 
the multimeter route just yet (not having a multimeter isn't helping)
But if I am getting nowhere with all this by tommorrow I might try 
and borrow one and do as you suggested earlier....
Also...I think I read on an earlier thread that you can't get 
replacement PSUs for xl7s any more?...unless the place you mentioned 
in the midlands knows different....so it looks like the repair route 
is looking the best one......My old freind the tv repair man might be 
able to help us out here.....especially if I can get a dialogue going 
between yourself and him??? 
I also emailed powdec yesterday, but I sent my query to the sales 
guy..and I assume you sent your email as a technical query?  so i 
guess between us we should get some answers tommorrow.... really 
appreciate your help here....In fact if your ever up north you are 
welcome to come and visit our little studio set-up or see one of our 
gigs for free...if you want you can hear one of our old tracks by 
visiting valentine records' free download section on their 
website....ours is no. 12 (I think?) its called morning calls by 
mellowstone(thats our old name) and you can hear some of my xl7 
programming on the track (thats everything except the vocals and 
guitars.....its not a bad track, in fact it was used by a small 
manchester production co. for one of their travelogue films....hope 
you like it....
Enjoy the sunshine while its here....
 ..toe
(xl7@yahoogroups.com, "gonzinigonz" <gonzini@...> wrote:
>
> > the website is a bit ambiguouis.....if you go to the home page, 
> then 
> > click on the tab for the lowest voltage internal PSUs ...you will 
> > find a PTE43-??-c, and this is the one that is referred to in the 
> > audio fanzine magazine....and though it is only 6pin output...its 
> > dimensions exactly match the psu in my xl7 & it looks 
> > identical....
> 
> Looks can be deceiving
> 
> >surely this is the replacement psu for the faulty one?
> 
> Nop.. only a tripple rail not a quad :o( ( 5 if you include the 
> constant 10v rail..)
> Also dosent supply enough current (or not to the same spec)as the 
> original
>  
> > or is this what they used in the later comand stations.....did 
they 
> > somehow change the circuitry for the standbye mode?
> 
> Wouldnt of thought so, i think its just a differant model that 
> someone on the audio fanzine site decided that was the one because 
it 
> looked the same.. which ain't! (though its in the same case and IEC 
> connection and power switch are the same)
> 
> > why does the emu 
> > psu have so many different voltage outputs anyway....no wonder 
they 

> > never used a wall wart transformer thingamajiggy....
> 
> These are the voltage rails it needs to work, thats the way it is.
> 3.3v and +5v for logic, ram, DSP, CPU, LCD etc
> +/- 12 for the analogue audio stuff (and the 12v gooseneck lamp on 
> the front!)
>  
> >  I will mail you a photo of the psu showing what I think are 
> > symptomns of minor meltdown/overheat....
> 
> Please do, high res photos good. upto say 6mb fine.
> You've got the email.
> 
> Cheers
> Gonz
>

Sure you cant do close ups, no macro or anything like that.
How about a high res picture from the shortest distance you can get 
it to focus?
If it looks like somethings really fried then all effort could be 
made into sourcing a replacement.

> I recently changed a fuse in my boilers' 
> circuit board and discovered it had a secondary fuse on the board 
> (encased in a black module type of thing)......surely there might  
> be a secondary fuse on the psu board???

Usually only on the mains input side of the SMPS board.
If this fuse has blow its normally bad news..

> My old freind the tv repair man might be 
> able to help us out here.....especially if I can get a dialogue    
> going between yourself and him???

He should be able to repair it as long as the hi frequency 
transformer or other obscure parts havan't failed.
Its usually a filter cap or resistor failed. If its bad then the 
switching transistor / IC can self distruct leaving a bit of a 
mess..  

> Enjoy the sunshine while its here....

hummmm been out in it fixing electrics on some crazy german camper 
bus thing.. thats in i right old mess. It never stops.

I'll read up on my cameras' instructions to see if there is a macro 
mode.....if not, I'll just do the best I can with it and send it to 
you hopefully later.......cheers...toe
 
--- In xl7@yahoogroups.com, "gonzinigonz" <gonzini@...> wrote:
>
> Sure you cant do close ups, no macro or anything like that.
> How about a high res picture from the shortest distance you can get 
> it to focus?
> If it looks like somethings really fried then all effort could be 
> made into sourcing a replacement.
> 
> > I recently changed a fuse in my boilers' 
> > circuit board and discovered it had a secondary fuse on the board 
> > (encased in a black module type of thing)......surely there 
might  
> > be a secondary fuse on the psu board???
> 
> Usually only on the mains input side of the SMPS board.
> If this fuse has blow its normally bad news..
> 
> > My old freind the tv repair man might be 
> > able to help us out here.....especially if I can get a 
dialogue    

> > going between yourself and him???
> 
> He should be able to repair it as long as the hi frequency 
> transformer or other obscure parts havan't failed.
> Its usually a filter cap or resistor failed. If its bad then the 
> switching transistor / IC can self distruct leaving a bit of a 
> mess..  
> 
> > Enjoy the sunshine while its here....
> 
> hummmm been out in it fixing electrics on some crazy german camper 
> bus thing.. thats in i right old mess. It never stops.
>

ok cool. maybe we should take this of the list now as where having 
personal conversions! 

gonzini@...

Guess we can post any results we have to help other people
Cheers
Gonz

 

--- In xl7@yahoogroups.com, "tonyhoneyford" <honeyford@...> wrote:

>
> I'll read up on my cameras' instructions to see if there is a macro 
> mode.....if not, I'll just do the best I can with it and send it to 
> you hopefully later.......cheers...toe