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)