[David Nebenzahl]

I inherited a repair job that I can't get started because I can't get
the damn amp open.

It's a Galaxy Audio Core PA5X140 all-in-one PA. It's a tough little
unit, with a die-cast metal chassis set into a thick rugged plastic
(polypropylene?) case, that can sit on top of a mike stand. Similar to
this one: http://galaxyaudio.com/MSPA.jsp. The front of the chassis has
6 screws into the case, and there's one on the back I removed, but I
still can't get the chassis out of the case. I tried prying the case,
thinking there might be some cast-in lugs I could open, but no luck, and
I didn't want to risk chewing up the edge of the case.

Does anyone have any idea how to open up this unit?


--
The fashion in killing has an insouciant, flirty style this spring,
with the flaunting of well-defined muscle, wrapped in flags.

- Comment from an article on Antiwar.com (http://antiwar.com)

[thanatoid]

David Nebenzahl wrote in
.com:

I inherited a repair job that I can't get started because I
can't get the damn amp open.

It's a Galaxy Audio Core PA5X140 all-in-one PA. It's a
tough little unit, with a die-cast metal chassis set into a
thick rugged plastic (polypropylene?) case, that can sit on
top of a mike stand. Similar to this one:
http://galaxyaudio.com/MSPA.jsp. The front of the chassis
has 6 screws into the case, and there's one on the back I
removed, but I still can't get the chassis out of the case.
I tried prying the case, thinking there might be some
cast-in lugs I could open, but no luck, and I didn't want
to risk chewing up the edge of the case.

Does anyone have any idea how to open up this unit?

I have noticed that sometimes there is a screw (or more than
one) under one (or more) stick-on label(s).


--
"Anytime I hear the word "culture", I get on the Internet."
- a 21st Century Moron

[David Nebenzahl]

On 9/12/2010 10:47 PM thanatoid spake thus:

David Nebenzahl wrote in
.com:

I inherited a repair job that I can't get started because I
can't get the damn amp open.

It's a Galaxy Audio Core PA5X140 all-in-one PA. It's a
tough little unit, with a die-cast metal chassis set into a
thick rugged plastic (polypropylene?) case, that can sit on
top of a mike stand. Similar to this one:
http://galaxyaudio.com/MSPA.jsp. The front of the chassis
has 6 screws into the case, and there's one on the back I
removed, but I still can't get the chassis out of the case.
I tried prying the case, thinking there might be some
cast-in lugs I could open, but no luck, and I didn't want
to risk chewing up the edge of the case.

Does anyone have any idea how to open up this unit?

I have noticed that sometimes there is a screw (or more than
one) under one (or more) stick-on label(s).

Good idea, but no screws lurking underneath labels here.


--
The fashion in killing has an insouciant, flirty style this spring,
with the flaunting of well-defined muscle, wrapped in flags.

- Comment from an article on Antiwar.com (http://antiwar.com)

[Bill Graham]

"David Nebenzahl" wrote in message
.com...
I inherited a repair job that I can't get started because I can't get the
damn amp open.

It's a Galaxy Audio Core PA5X140 all-in-one PA. It's a tough little unit,
with a die-cast metal chassis set into a thick rugged plastic
(polypropylene?) case, that can sit on top of a mike stand. Similar to
this one: http://galaxyaudio.com/MSPA.jsp. The front of the chassis has 6
screws into the case, and there's one on the back I removed, but I still
can't get the chassis out of the case. I tried prying the case, thinking
there might be some cast-in lugs I could open, but no luck, and I didn't
want to risk chewing up the edge of the case.

Does anyone have any idea how to open up this unit?


--
The fashion in killing has an insouciant, flirty style this spring,
with the flaunting of well-defined muscle, wrapped in flags.

- Comment from an article on Antiwar.com (http://antiwar.com)

Specifically, No....But I have sometimes found that they like to hide screws
underneath the pasted on rubber feet, so you might investigate that. Also,
inspect the cover carefully to see exactly which panels are welded to what
other panels, and you might get a clue as to where the screws have to be in
order for it to come apart......

[David Nebenzahl]

On 9/12/2010 11:17 PM Bill Graham spake thus:

"David Nebenzahl" wrote in message
.com...

I inherited a repair job that I can't get started because I can't
get the damn amp open.

It's a Galaxy Audio Core PA5X140 all-in-one PA. It's a tough little
unit, with a die-cast metal chassis set into a thick rugged plastic
(polypropylene?) case, that can sit on top of a mike stand.
Similar to this one: http://galaxyaudio.com/MSPA.jsp. The front of
the chassis has 6 screws into the case, and there's one on the back
I removed, but I still can't get the chassis out of the case. I
tried prying the case, thinking there might be some cast-in lugs I
could open, but no luck, and I didn't want to risk chewing up the
edge of the case.

Does anyone have any idea how to open up this unit?

Specifically, No....But I have sometimes found that they like to hide screws
underneath the pasted on rubber feet, so you might investigate that.

Nope, no feet on the bottom.

Also, inspect the cover carefully to see exactly which panels are
welded to what other panels, and you might get a clue as to where the
screws have to be in order for it to come apart......

Nothing's welded to anything. Just a diecast chassis set into a plastic
case that surrounds it.


--
The fashion in killing has an insouciant, flirty style this spring,
with the flaunting of well-defined muscle, wrapped in flags.

- Comment from an article on Antiwar.com (http://antiwar.com)

[Adrian C]

On 13/09/2010 08:32, David Nebenzahl wrote:

Nothing's welded to anything. Just a diecast chassis set into a plastic
case that surrounds it.


Do the control knobs on the front come off to reveal spindle nuts?

--
Adrian C

[Arfa Daily]

"David Nebenzahl" wrote in message
.com...
I inherited a repair job that I can't get started because I can't get the
damn amp open.

It's a Galaxy Audio Core PA5X140 all-in-one PA. It's a tough little unit,
with a die-cast metal chassis set into a thick rugged plastic
(polypropylene?) case, that can sit on top of a mike stand. Similar to
this one: http://galaxyaudio.com/MSPA.jsp. The front of the chassis has 6
screws into the case, and there's one on the back I removed, but I still
can't get the chassis out of the case. I tried prying the case, thinking
there might be some cast-in lugs I could open, but no luck, and I didn't
want to risk chewing up the edge of the case.

Does anyone have any idea how to open up this unit?


--


Try emailing Galaxy and asking them ? They can only say no ...

Head up your email "Urgent - Please Pass to Service Department" You might
strike lucky and get a secretary that prints it out and passes it on without
'filtering' it. In my experience, most engineers don't mind helping others,
and unless the company has a really strict 'no help' policy, quite often if
you can get as far as direct communication with an engineer, you can get the
information you need.

Arfa

[Michael A. Terrell]

David Nebenzahl wrote:

I inherited a repair job that I can't get started because I can't get
the damn amp open.

It's a Galaxy Audio Core PA5X140 all-in-one PA. It's a tough little
unit, with a die-cast metal chassis set into a thick rugged plastic
(polypropylene?) case, that can sit on top of a mike stand. Similar to
this one: http://galaxyaudio.com/MSPA.jsp. The front of the chassis has
6 screws into the case, and there's one on the back I removed, but I
still can't get the chassis out of the case. I tried prying the case,
thinking there might be some cast-in lugs I could open, but no luck, and
I didn't want to risk chewing up the edge of the case.

Does anyone have any idea how to open up this unit?


At least no one has suggested a Plsma Cutter! ;-)


--
Politicians should only get paid if the budget is balanced, and there is
enough left over to pay them.

[N_Cook]

Michael A. Terrell wrote in message
m...

David Nebenzahl wrote:

I inherited a repair job that I can't get started because I can't get
the damn amp open.

It's a Galaxy Audio Core PA5X140 all-in-one PA. It's a tough little
unit, with a die-cast metal chassis set into a thick rugged plastic
(polypropylene?) case, that can sit on top of a mike stand. Similar to
this one: http://galaxyaudio.com/MSPA.jsp. The front of the chassis has
6 screws into the case, and there's one on the back I removed, but I
still can't get the chassis out of the case. I tried prying the case,
thinking there might be some cast-in lugs I could open, but no luck, and
I didn't want to risk chewing up the edge of the case.

Does anyone have any idea how to open up this unit?


At least no one has suggested a Plsma Cutter! ;-)


--
Politicians should only get paid if the budget is balanced, and there is
enough left over to pay them.


A ring cutter yes, as a last resort, to make an inspection hole.
Somewhere there is unlikely to be active stuff and where a blanking plate
could be fixed over the hole and maybe another hole if the first reveals
nothing useful. Where an "endoscope" would be useful.

I'm assuming you've run a piece of rounded off dowel over any decals for
covered screwpoint recesses.

[Arfa Daily]

"Michael A. Terrell" wrote in message
m...

David Nebenzahl wrote:

I inherited a repair job that I can't get started because I can't get
the damn amp open.

It's a Galaxy Audio Core PA5X140 all-in-one PA. It's a tough little
unit, with a die-cast metal chassis set into a thick rugged plastic
(polypropylene?) case, that can sit on top of a mike stand. Similar to
this one: http://galaxyaudio.com/MSPA.jsp. The front of the chassis has
6 screws into the case, and there's one on the back I removed, but I
still can't get the chassis out of the case. I tried prying the case,
thinking there might be some cast-in lugs I could open, but no luck, and
I didn't want to risk chewing up the edge of the case.

Does anyone have any idea how to open up this unit?


At least no one has suggested a Plsma Cutter! ;-)



Nah! "Angle grinder" as they always say over on uk.d-i-y :-)

Arfa

[N_Cook]

Arfa Daily wrote in message
...


"Michael A. Terrell" wrote in message
m...

David Nebenzahl wrote:

I inherited a repair job that I can't get started because I can't get
the damn amp open.

It's a Galaxy Audio Core PA5X140 all-in-one PA. It's a tough little
unit, with a die-cast metal chassis set into a thick rugged plastic
(polypropylene?) case, that can sit on top of a mike stand. Similar to
this one: http://galaxyaudio.com/MSPA.jsp. The front of the chassis has
6 screws into the case, and there's one on the back I removed, but I
still can't get the chassis out of the case. I tried prying the case,
thinking there might be some cast-in lugs I could open, but no luck,
and
I didn't want to risk chewing up the edge of the case.

Does anyone have any idea how to open up this unit?


At least no one has suggested a Plsma Cutter! ;-)



Nah! "Angle grinder" as they always say over on uk.d-i-y :-)

Arfa


When you loose neg bias on audio output bottles and a hole is burnt through
the anode plate and up to the point the the glass melts and vacuum is lost ,
is that plasma cutting?

[Michael A. Terrell]

Arfa Daily wrote:

"Michael A. Terrell" wrote in message
m...

David Nebenzahl wrote:

I inherited a repair job that I can't get started because I can't get
the damn amp open.

It's a Galaxy Audio Core PA5X140 all-in-one PA. It's a tough little
unit, with a die-cast metal chassis set into a thick rugged plastic
(polypropylene?) case, that can sit on top of a mike stand. Similar to
this one: http://galaxyaudio.com/MSPA.jsp. The front of the chassis has
6 screws into the case, and there's one on the back I removed, but I
still can't get the chassis out of the case. I tried prying the case,
thinking there might be some cast-in lugs I could open, but no luck, and
I didn't want to risk chewing up the edge of the case.

Does anyone have any idea how to open up this unit?


At least no one has suggested a Plsma Cutter! ;-)


Nah! "Angle grinder" as they always say over on uk.d-i-y :-)


Angle grinders are for amateurs and wimps. It takes a real prow to
cut something open with a plasma cutter and still have anything left to
repair.


--
Politicians should only get paid if the budget is balanced, and there is
enough left over to pay them.

[Arfa Daily]

"Michael A. Terrell" wrote in message
...

Arfa Daily wrote:

"Michael A. Terrell" wrote in message
m...

David Nebenzahl wrote:

I inherited a repair job that I can't get started because I can't get
the damn amp open.

It's a Galaxy Audio Core PA5X140 all-in-one PA. It's a tough little
unit, with a die-cast metal chassis set into a thick rugged plastic
(polypropylene?) case, that can sit on top of a mike stand. Similar to
this one: http://galaxyaudio.com/MSPA.jsp. The front of the chassis
has
6 screws into the case, and there's one on the back I removed, but I
still can't get the chassis out of the case. I tried prying the case,
thinking there might be some cast-in lugs I could open, but no luck,
and
I didn't want to risk chewing up the edge of the case.

Does anyone have any idea how to open up this unit?


At least no one has suggested a Plsma Cutter! ;-)


Nah! "Angle grinder" as they always say over on uk.d-i-y :-)


Angle grinders are for amateurs and wimps. It takes a real prow to
cut something open with a plasma cutter and still have anything left to
repair.



It's a standing joke on that group Michael. "Angle grinder" is the 'silly'
answer when anyone asks for instance how to dismantle a ceramic cartridge
shower valve to clean it, or anything referring to a 'delicate' job. British
humour, and all that ... :-)

Arfa

[Michael A. Terrell]

Arfa Daily wrote:

"Michael A. Terrell" wrote in message
...

Arfa Daily wrote:

"Michael A. Terrell" wrote in message
m...

David Nebenzahl wrote:

I inherited a repair job that I can't get started because I can't get
the damn amp open.

It's a Galaxy Audio Core PA5X140 all-in-one PA. It's a tough little
unit, with a die-cast metal chassis set into a thick rugged plastic
(polypropylene?) case, that can sit on top of a mike stand. Similar to
this one: http://galaxyaudio.com/MSPA.jsp. The front of the chassis
has
6 screws into the case, and there's one on the back I removed, but I
still can't get the chassis out of the case. I tried prying the case,
thinking there might be some cast-in lugs I could open, but no luck,
and
I didn't want to risk chewing up the edge of the case.

Does anyone have any idea how to open up this unit?


At least no one has suggested a Plsma Cutter! ;-)


Nah! "Angle grinder" as they always say over on uk.d-i-y :-)


Angle grinders are for amateurs and wimps. It takes a real prow to
cut something open with a plasma cutter and still have anything left to
repair.



It's a standing joke on that group Michael. "Angle grinder" is the 'silly'
answer when anyone asks for instance how to dismantle a ceramic cartridge
shower valve to clean it, or anything referring to a 'delicate' job. British
humour, and all that ... :-)


And you still don't get American humor. ;-)


--
Politicians should only get paid if the budget is balanced, and there is
enough left over to pay them.

[Arfa Daily]

"Michael A. Terrell" wrote in message
...

Arfa Daily wrote:

"Michael A. Terrell" wrote in message
m...

David Nebenzahl wrote:

I inherited a repair job that I can't get started because I can't get
the damn amp open.

It's a Galaxy Audio Core PA5X140 all-in-one PA. It's a tough little
unit, with a die-cast metal chassis set into a thick rugged plastic
(polypropylene?) case, that can sit on top of a mike stand. Similar to
this one: http://galaxyaudio.com/MSPA.jsp. The front of the chassis
has
6 screws into the case, and there's one on the back I removed, but I
still can't get the chassis out of the case. I tried prying the case,
thinking there might be some cast-in lugs I could open, but no luck,
and
I didn't want to risk chewing up the edge of the case.

Does anyone have any idea how to open up this unit?


At least no one has suggested a Plsma Cutter! ;-)


Nah! "Angle grinder" as they always say over on uk.d-i-y :-)


Angle grinders are for amateurs and wimps. It takes a real prow to
cut something open with a plasma cutter and still have anything left to
repair.



It's a standing joke on that group Michael. "Angle grinder" is the 'silly'
answer when anyone asks for instance how to dismantle a ceramic cartridge
shower valve to clean it, or anything referring to a 'delicate' job. British
humour, and all that ... :-)

Arfa

[Arny Krueger]

"Michael A. Terrell" wrote in
message m
David Nebenzahl wrote:

I inherited a repair job that I can't get started
because I can't get the damn amp open.

It's a Galaxy Audio Core PA5X140 all-in-one PA. It's a
tough little unit, with a die-cast metal chassis set
into a thick rugged plastic (polypropylene?) case, that
can sit on top of a mike stand. Similar to this one:
http://galaxyaudio.com/MSPA.jsp. The front of the
chassis has 6 screws into the case, and there's one on
the back I removed, but I still can't get the chassis
out of the case. I tried prying the case, thinking there
might be some cast-in lugs I could open, but no luck,
and I didn't want to risk chewing up the edge of the
case.

Does anyone have any idea how to open up this unit?


At least no one has suggested a Plasma Cutter! ;-)

IME diamond saws are a more readily available and economical alternative.
This is one of the major changes in tooling of this millennium - industrial
diamonds are now so inexpensive that tools that effectively employ them are
readily available in most big-box home improvement stores. That all said,
this product seems to be composed of materials that are too soft and too
temperature sensitive for effective cutting by diamond-tipped tools or
plasma cutters.

[Michael A. Terrell]

Arny Krueger wrote:

"Michael A. Terrell" wrote in
message m
David Nebenzahl wrote:

I inherited a repair job that I can't get started
because I can't get the damn amp open.

It's a Galaxy Audio Core PA5X140 all-in-one PA. It's a
tough little unit, with a die-cast metal chassis set
into a thick rugged plastic (polypropylene?) case, that
can sit on top of a mike stand. Similar to this one:
http://galaxyaudio.com/MSPA.jsp. The front of the
chassis has 6 screws into the case, and there's one on
the back I removed, but I still can't get the chassis
out of the case. I tried prying the case, thinking there
might be some cast-in lugs I could open, but no luck,
and I didn't want to risk chewing up the edge of the
case.

Does anyone have any idea how to open up this unit?


At least no one has suggested a Plasma Cutter! ;-)

IME diamond saws are a more readily available and economical alternative.
This is one of the major changes in tooling of this millennium - industrial
diamonds are now so inexpensive that tools that effectively employ them are
readily available in most big-box home improvement stores. That all said,
this product seems to be composed of materials that are too soft and too
temperature sensitive for effective cutting by diamond-tipped tools or
plasma cutters.


A diamond saw? Save that to remodel your bathroom.


--
Politicians should only get paid if the budget is balanced, and there is
enough left over to pay them.

[Doug Freyburger]

Michael A. Terrell wrote:
David Nebenzahl wrote:

Does anyone have any idea how to open up this unit?

At least no one has suggested a Plsma Cutter! ;-)

If you try brute force and it did not work, you were not using ENOUGH!
;^)

[thanatoid]

David Nebenzahl wrote in
.com:

I inherited a repair job that I can't get started because I
can't get the damn amp open.

It's a Galaxy Audio Core PA5X140 all-in-one PA. It's a
tough little unit, with a die-cast metal chassis set into a
thick rugged plastic (polypropylene?) case, that can sit on
top of a mike stand. Similar to this one:
http://galaxyaudio.com/MSPA.jsp

You or someone you know has a digital camera. Take a photo of
the ****ing thing, all sides, and post it to a binary group of
your choice or to some stupid site like photobucket or flickr.
It's will considerably improve your chances of opening the
thing.

I for one would like to see what the hell we are talking about.

"Similar to this one" does NOT cut it.



--
"Anytime I hear the word "culture", I reach for my iPad."
- 21st Century Humanoid

[GregS[_3_]]

In article , David Nebenzahl wrote:
I inherited a repair job that I can't get started because I can't get
the damn amp open.

It's a Galaxy Audio Core PA5X140 all-in-one PA. It's a tough little
unit, with a die-cast metal chassis set into a thick rugged plastic
(polypropylene?) case, that can sit on top of a mike stand. Similar to
this one: http://galaxyaudio.com/MSPA.jsp. The front of the chassis has
6 screws into the case, and there's one on the back I removed, but I
still can't get the chassis out of the case. I tried prying the case,
thinking there might be some cast-in lugs I could open, but no luck, and
I didn't want to risk chewing up the edge of the case.

Does anyone have any idea how to open up this unit?


I would like to see a pic of the rear which i can't find.
I often have to uncover hidden screws in things.
I also have to do alot of prying on things.

greg

[bob u]

On 9/13/2010 12:32 AM, David Nebenzahl wrote:
I inherited a repair job that I can't get started because I can't get
the damn amp open.

It's a Galaxy Audio Core PA5X140 all-in-one PA. It's a tough little
unit, with a die-cast metal chassis set into a thick rugged plastic
(polypropylene?) case, that can sit on top of a mike stand. Similar to
this one: http://galaxyaudio.com/MSPA.jsp. The front of the chassis has
6 screws into the case, and there's one on the back I removed, but I
still can't get the chassis out of the case. I tried prying the case,
thinking there might be some cast-in lugs I could open, but no luck, and
I didn't want to risk chewing up the edge of the case.

Does anyone have any idea how to open up this unit?


I have a Core PA5X140 hot spot sitting in front of me.
single 5" speaker with amp built in. It really did not want
to open either. It has 6 screws on the front.
a screw on the back. On this unit, there are 1/4" phone jacks on the
rear. These are connected to the internal circuit board. SO, the lock
nuts MUST be taken off the phone jacks before you start the removal process.

On this one, the front face is inset down into the rear shell. My guess
is stictation or such is a factor. First on this unit, i gently pried
around the deal with a razer blade. Then i used a very small flat blade
screw driver to try to break loose the case from the front. Then i kind
of beat on it to see if gravity would help it separate (face down). I
eventually got it apart, but it did not want to easily separate.

bob

[David Nebenzahl]

On 9/15/2010 12:51 PM bob u spake thus:

On 9/13/2010 12:32 AM, David Nebenzahl wrote:

I inherited a repair job that I can't get started because I can't
get the damn amp open.

It's a Galaxy Audio Core PA5X140 all-in-one PA. It's a tough little
unit, with a die-cast metal chassis set into a thick rugged
plastic (polypropylene?) case, that can sit on top of a mike stand.
Similar to this one: http://galaxyaudio.com/MSPA.jsp. The front of
the chassis has 6 screws into the case, and there's one on the back
I removed, but I still can't get the chassis out of the case. I
tried prying the case, thinking there might be some cast-in lugs I
could open, but no luck, and I didn't want to risk chewing up the
edge of the case.

Does anyone have any idea how to open up this unit?

I have a Core PA5X140 hot spot sitting in front of me. single 5"
speaker with amp built in. It really did not want to open either. It
has 6 screws on the front. a screw on the back. On this unit, there
are 1/4" phone jacks on the rear. These are connected to the internal
circuit board. SO, the lock nuts MUST be taken off the phone jacks
before you start the removal process.

On this one, the front face is inset down into the rear shell. My guess
is stictation or such is a factor. First on this unit, i gently pried
around the deal with a razer blade. Then i used a very small flat blade
screw driver to try to break loose the case from the front. Then i kind
of beat on it to see if gravity would help it separate (face down). I
eventually got it apart, but it did not want to easily separate.

Thanks for the first and only really helpful reply in this whole damn
thread.

You, sir, are a gentleman and a scholar. Sure enough, removing the nut
from the phone jack allowed the whole unit to slip rather easily out of
the case (I used a heavy knife blade betwixt the case and chassis to
start it).

The amp appears to be fine; there's either a problem with the XLR mike
input jack, or with the mike cable we were using. (Can't test because I
have no XLR plugs.)

Thanks again.


--
The fashion in killing has an insouciant, flirty style this spring,
with the flaunting of well-defined muscle, wrapped in flags.

- Comment from an article on Antiwar.com (http://antiwar.com)

[Smitty Two]

In article ,
David Nebenzahl wrote:

Sure enough, removing the nut
from the phone jack allowed the whole unit to slip rather easily out of
the case

Sheesh. You "shoulda" known enough to do that, at least. Good grief.

[Arfa Daily]

"Smitty Two" wrote in message
news
In article ,
David Nebenzahl wrote:

Sure enough, removing the nut
from the phone jack allowed the whole unit to slip rather easily out of
the case

Sheesh. You "shoulda" known enough to do that, at least. Good grief.

Hmmm. I agree that is a little fundamental. I thought we were looking at a
'real' puzzle here ... And without an XLR balanced / unbalanced signal
source, how can you test properly, without making possibly unfounded guesses
about the service condition of the mic or its lead or the socket on this
amp. I would have thought that this sort of test would be fundamental before
wasting time trying to rip it all apart. It is in my workshop anyway.

Arfa

[bob u]

On 9/16/2010 3:30 AM, Arfa Daily wrote:


"Smitty Two" wrote in message
news
In article ,
David Nebenzahl wrote:

Sure enough, removing the nut
from the phone jack allowed the whole unit to slip rather easily out of
the case

Sheesh. You "shoulda" known enough to do that, at least. Good grief.


Its not really self evident that the jack is connected to the PC board.
When i took mine apart, i certainly did NOT think it was that way. I
eventually figured it out, but it took a while. i assumed it was just
a raw jack connected with loose wires to the amplifier.

bob

[Meat Plow[_3_]]

On Wed, 15 Sep 2010 22:35:59 -0700, Smitty Two wrote:

In article ,
David Nebenzahl wrote:

Sure enough, removing the nut
from the phone jack allowed the whole unit to slip rather easily out of
the case

Sheesh. You "shoulda" known enough to do that, at least. Good grief.

Yeah no kidding. boggle



--
Live Fast, Die Young and Leave a Pretty Corpse

[Arny Krueger]

"Smitty Two" wrote in message
news
In article
,
David Nebenzahl wrote:

Sure enough, removing the nut
from the phone jack allowed the whole unit to slip
rather easily out of the case

Sheesh. You "shoulda" known enough to do that, at least.
Good grief.

I feel stupid for not suggesting removing the nuts on the phone jacks. I've
seen this done sooooo many times.

I can't remember the last time I saw a phone jack that *wasn't* soldered to
a circuit card.

[David Nebenzahl]

On 9/16/2010 6:57 AM Arny Krueger spake thus:

"Smitty Two" wrote in message
news
In article ,
David Nebenzahl wrote:

Sure enough, removing the nut from the phone jack allowed the
whole unit to slip rather easily out of the case

Sheesh. You "shoulda" known enough to do that, at least. Good
grief.

I feel stupid for not suggesting removing the nuts on the phone jacks. I've
seen this done sooooo many times.

Oh, so I guess that means I'm *not* a total retard, eh? Thanks for that.

I can't remember the last time I saw a phone jack that *wasn't* soldered to
a circuit card.

Me neither. Now that I've disassembled this it makes perfect sense, as
it allows the amp to be put together in a neat package with no external
wires except for the power cord.

With the 6 front-panel screws and the phone-jack nut removed, it's
actually *very* easy to disassemble. Not a hard nut to crack at all,
like so much other plastic-packaged electronics.


--
The fashion in killing has an insouciant, flirty style this spring,
with the flaunting of well-defined muscle, wrapped in flags.

- Comment from an article on Antiwar.com (http://antiwar.com)

[thanatoid]

David Nebenzahl wrote in
.com:

snip

Thanks for the first and only really helpful reply in this
whole damn thread.

You, sir, are a gentleman and a scholar. Sure enough,
removing the nut from the phone jack allowed the whole unit
to slip rather easily out of the case (I used a heavy knife
blade betwixt the case and chassis to start it).

WHAT? You did NOT do that when you removed all the screws? I
have not been reading the thread carefully ever since you
ignored my request for a photograph, but DUUH!

The amp appears to be fine; there's either a problem with
the XLR mike input jack, or with the mike cable we were
using. (Can't test because I have no XLR plugs.)

WHERE are you (as in, forest, garage with NO tools, an audio
shop run by Scientologists who believe the e-meter is the only
piece of electronic test equipment anyone needs) ????????

SIGH.

BTW, I have learned over the last 4 decades that it's ALWAYS the
cable (and if it's not, you **still** test any cables FIRST
before you do ANYTHING, including attempting to open an audio
box [when you should let your friends open your canned food for
you] let alone flooding an NG with clueless posts for a week),
and /had/ you posted like a person with a clue, I would have
told you to try another cable - I know you don't have one, BUY
one!

!!!!!!

--
"Anytime I hear the word "culture", I reach for my iPad."
- 21st Century Humanoid

[David Nebenzahl]

On 9/16/2010 8:15 AM thanatoid spake thus:

David Nebenzahl wrote in
.com:

snip

Thanks for the first and only really helpful reply in this
whole damn thread.

You, sir, are a gentleman and a scholar. Sure enough,
removing the nut from the phone jack allowed the whole unit
to slip rather easily out of the case (I used a heavy knife
blade betwixt the case and chassis to start it).

WHAT? You did NOT do that when you removed all the screws? I
have not been reading the thread carefully ever since you
ignored my request for a photograph, but DUUH!

The amp appears to be fine; there's either a problem with
the XLR mike input jack, or with the mike cable we were
using. (Can't test because I have no XLR plugs.)

WHERE are you (as in, forest, garage with NO tools, an audio
shop run by Scientologists who believe the e-meter is the only
piece of electronic test equipment anyone needs) ????????

SIGH.

BTW, I have learned over the last 4 decades that it's ALWAYS the
cable (and if it's not, you **still** test any cables FIRST
before you do ANYTHING, including attempting to open an audio
box [when you should let your friends open your canned food for
you] let alone flooding an NG with clueless posts for a week),
and /had/ you posted like a person with a clue, I would have
told you to try another cable - I know you don't have one, BUY
one!

Look, you little **** (and keep in mind that *you* were the first one in
this thread to use profanity): let me explain my situation for your
little pea-brain to understand.

I am not a professional electronics repairperson. I don't maintain a
repair shop, nor solicit repairs. This is why I own no XLR connectors:
normally I have absolutely no need for such things. I have no sound
equipment, microphones, etc. This one just landed in my lap. I used to
be in a band, the leader of which just recently died, and when we tried
to use this amp at a gig, it failed. I offered to diagnose it and
determine what was wrong with it.

I'm 99.99% sure that the problem is outboard of the jack connections on
the amp simply by doing the "touch the input connection and listen for
hum" test. The amp responded admirably well to this test, so I'm certain
it works. The problem, then, is obviously either the jack on the amp or
somewhere in the microphone cable being used. There wasn't enough time
to get another cable and test it.

So if you want to continue to berate me for some perceived slight
against the propriety of this newsgroup, which after all is supposed to
be a source of information for people seeking such, well then, go right
ahead and be my guest.


--
The fashion in killing has an insouciant, flirty style this spring,
with the flaunting of well-defined muscle, wrapped in flags.

- Comment from an article on Antiwar.com (http://antiwar.com)

[thanatoid]

David Nebenzahl wrote in
.com:

On 9/16/2010 8:15 AM thanatoid spake thus:

snip

WHAT? You did NOT do that when you removed all the screws?
I have not been reading the thread carefully ever since
you ignored my request for a photograph, but DUUH!

The amp appears to be fine; there's either a problem with
the XLR mike input jack, or with the mike cable we were
using. (Can't test because I have no XLR plugs.)

WHERE are you (as in, forest, garage with NO tools, an
audio shop run by Scientologists who believe the e-meter
is the only piece of electronic test equipment anyone
needs) ????????

SIGH.

BTW, I have learned over the last 4 decades that it's
ALWAYS the cable (and if it's not, you **still** test any
cables FIRST before you do ANYTHING, including attempting
to open an audio box [when you should let your friends
open your canned food for you] let alone flooding an NG
with clueless posts for a week), and /had/ you posted like
a person with a clue, I would have told you to try another
cable - I know you don't have one, BUY one!

Look, you little ****

Is that the BEST you can do? C'mon! Work with me here!

(and keep in mind that *you* were the
first one in this thread to use profanity)

OMG! Profanity on the Usenet! My transgression is
unforgivable! Please have the mother****ing pigs come and
arrest me STAT!

let me explain my situation for your little pea-brain to
understand.

I have a HUGE head, I can never find a hat to fit me. And I
have an IQ of 134. Not THAT high, but odds /are/ it's higher
than yours. OTOH, head and brain size have nothing to do with
intelligence.

I am not a professional electronics repairperson.

Neither am I.

I don't
maintain a repair shop, nor solicit repairs.

Neither do I.

This is why I
own no XLR connectors: normally I have absolutely no need
for such things. I have no sound equipment, microphones,
etc.

I used to sing (using the term loosely) and play guitar
(etc.) in bands, so I have a ton of XLR (and other)
connectors and cables, etc. I understand not everyone has
such items on site.

This one just landed in my lap. I used to be in a
band, the leader of which just recently died, and when we
tried to use this amp at a gig, it failed.

It's not a bad idea to test other people's
instruments/equipment before using them, let alone WHEN DOING
A GIG.

And there were NO other cables on the stage at the time, huh?

I offered to diagnose it and determine what was wrong with
it.

Hmm. So you ALSO used to be in a band, and you don't have a
single XLR cable in the house?

Hmm. What kind of band?

I'm 99.99% sure that the problem is outboard of the jack
connections on the amp simply by doing the "touch the input
connection and listen for hum" test. The amp responded
admirably well to this test, so I'm certain it works.The
problem, then, is obviously either the jack on the amp
or somewhere in the microphone cable being used. There
wasn't enough time to get another cable and test it.

No, of course not.

So if you want to continue to berate me for some perceived
slight against the propriety of this newsgroup, which after
all is supposed to be a source of information for people
seeking such, well then, go right ahead and be my guest.

I am not berating you, I understand why you posted your
question here, but you or someone you know DO have a digital
camera, you DO know how to use the internet, and you SHOULD
HAVE CHECKED THE CABLE before spending a week trying to open
a box you are not qualified to look inside of!

WHAT were you expecting to find, a soldered cable connection
/inside a sealed enclosure/ which just /decided/ to come
undone for no reason whatsoever?

And, BTW - an e-meter (q.v.) CAN be used to test cables, as I
realized after posting. But I waited, hoping for an
entertaining reply - and I was NOT disappointed! ;-)


--
"Anytime I hear the word "culture", I reach for my iPad."
- 21st Century Humanoid

[Wild_Bill]

I'm dredging up this old subject from 2010 which isn't really worthy of
reading since it's mostly personal attack exchanges, but the point worth
mentioning* is:

Remove the 6 front panel screws AND 1 screw in the back *plus the nut on the
1/4" jack.

The reason I was looking for looking for info regarding this unit (already
had it opened) is because I bought one today for $10US.
I routinely open and inspect any used equipment before I apply power.. just
a habit, although I usually can't resist opening new equipment either, after
I've used it for a while.

A schematic is available at Galaxy Audio's site
http://galaxyaudio.com/schematics.php

The seller said this unit was for parts/repair, and that it had been working
fine for years, then suddenly didn't.

Inspection hasn't been very thorough yet, although I didn't notice any
fuses, but also didn't notice anything burnt.
I saw pics of a board which had a burnt circuit trace on the large board
near where the edge of the board makes an inside corner and is close to the
speaker magnet.

There are a couple of spots of heat-induced discoloration around the leads
of D21 & 22, but it's minor.
These diodes are tied to/across the plus and minus supplies from the PSU.

In addition to the 15V supplies, there are also +/- 23V and +/- 50V
supplies.

A description of the unit states it's a Class H amplifier with 4 output Qs..
2 for low voltage (always in use), and 2 for high voltage which kick in when
demand exceeds the capacity of the LV pair.

--
Cheers,
WB
..............


"David Nebenzahl" wrote in message
.com...
I inherited a repair job that I can't get started because I can't get the
damn amp open.

It's a Galaxy Audio Core PA5X140 all-in-one PA. It's a tough little unit,
with a die-cast metal chassis set into a thick rugged plastic
(polypropylene?) case, that can sit on top of a mike stand. Similar to
this one: http://galaxyaudio.com/MSPA.jsp. The front of the chassis has 6
screws into the case, and there's one on the back I removed, but I still
can't get the chassis out of the case. I tried prying the case, thinking
there might be some cast-in lugs I could open, but no luck, and I didn't
want to risk chewing up the edge of the case.

Does anyone have any idea how to open up this unit?


--
The fashion in killing has an insouciant, flirty style this spring,
with the flaunting of well-defined muscle, wrapped in flags.

- Comment from an article on Antiwar.com (http://antiwar.com)