On Sunday, March 19, 2023 at 4:55:15=E2=80=AFPM UTC-4, John Robertson wrote=
:
On 2023/03/19 5:38 a.m., slim grossheim wrote:=20
On Saturday, August 1, 2009 at 9:34:07=E2=80=AFPM UTC-4, angel-care wro=
te:=20
On Aug 1, 6:37 am, McDuseldick <mcduseld...@googlemail.com> wrote:=20
On 13 Jun., 01:20, postman516 <postman...@aol.com> wrote:=20
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On Jun 12, 7:43 am, KR <kenreed1...@gmail.com> wrote:=20
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On Jun 12, 2:29 pm, postman516 <postman...@aol.com> wrote:=20
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Hello, i just bought an NSM Firebird wallbox that had no manual & =
i am=20
not happy with the volume i am getting from it. I am using Yamaha=
=20
bookshelf 8 ohm speakers and have the neg hooked to terminal 0 and=
the=20
pos to terminal 5 on each side of the transformer. I would say the=
=20
Volume is pretty low and when i try to turn the volume up or down=
=20
using the volume on the control board it does nothing to help the=
=20
matter. I also noticed the 3 buttons on the bottom of the box also=
do=20
not raise or lower the volume. So basically, right now i am stuck =
with=20
a fixed volume. I tried hooking the wires direct to the amp bypass=
ing=20
the transformer but this also did not help. Do you think i need a =
new=20
transformer and would this solve my problem? I see some newer boxe=
s=20
have a 7 lug transformer as well. Would that one give me more volu=
me=20
and would it work in my firebird wall box? Sorry about all the=20 >>>>>> questions but i am not sure what the problem is nor what the=20
transformers function truly is? The guy i bought it from knows not=
hing=20
about the box at all. Thanks for any help regarding this matter! M=
ike=20
in FL=20
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The transformers are probably the output transformers for the=20
amplifier. The taps represent wattage=20
levels, that are used to match speakers (or series/parallel groups =
of=20
speakers) to the amplifier and avoid overloading it. The transforme=
r=20
probably generates a 70v / 100v line for 500 ohm PA type speakers t=
oo.=20
(these will have a transformer on the back of them with wattage tap=
s=20
on them.)=20
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I doubt that the transformer is a problem, the sound would probably=
be=20
distorted / overloaded. In other brands, I have NEVER had an output=
=20
transformer fail on a solid state amp. You can disconnect it from t=
he=20
amp and run a speaker direct if you want, just to eliminate it.=20 >>>=20
The other possibility is blown output stage, this can result in low=
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volumes, but there would be distortion, and probably blown fuses to=
=20
the output transistors.=20
=20
I don't know how the volume control system works on these things. I=
f=20
it is done with buttons, it either drives a motorised pot, (this=20 >>>>> should be visibly connected to the amplifier / preamp board) or run=
s=20
via the CPU or to the amp, and then to a "volume control" IC on the=
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Amplifier Preamp board. it may also run to the amp, and control the=
=20
volume directly via a special IC.=20
=20
Either way, something along this chain is broken, you will need a=
=20
schematic or to identify and look up preamp the IC part numbers on =
the=20
web and identify how it all works and deal with it from there.- Hid=
e quoted text -=20
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- Show quoted text -=20
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I have found a wire harness that was cut and left in the box=20
that has 4 wires in it brown, blue, green and orange. They connect t=
o=20
the vol up, vol down & the cancel button at the bottom of the box bu=
t=20
i do not see anyplace that they would connect at? I was looking at=
=20
possibly St-206 on the preamp board as that is open on my box and ha=
s=20
four pins. Can anyone take a look at and let me know if i=20
should have a connector on at St-206 and what order the colors shoul=
d=20
be from top to bottom, it would be much appreciated. Thanks alot for=
=20
your help! Mike in Fl=20
=20
P.S. This box is the original firebird & has Es-IV boards in it- Zit=
ierten Text ausblenden -=20
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- Zitierten Text anzeigen -=20
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check out this one=20
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http://www.cdadapter.com/download/nsmcode4.pdf=20
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regards=20
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Ron- Hide quoted text -=20
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- Show quoted text -=20
Mike,=20
The vol. control in the box connects to the central computer at ST=20
206. If you had a remote vol. control it would connect to ST 205,=20
with a 5-wire connection.=20
As for connections, pin 1 is orange, pin 2 - green, pin 3 - brown and=
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pin 4 - black. Don't have any Firebirds here, otherwise I'd take a=20
pic. but still have manuals.=20
Hope this helps,=20
Gene=20
where are the pins located to hook up i have the wire but no plug on th=
e end
You aren't likely to get an answer from the OP (Gene) from back in 2009.=
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However I suspect you are looking for a DIN style plug - that was what=20
NSM often used for audio connections including volume controls.=20
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Expand a bit on your particular problem and include the model and=20
exactly what you are looking for if the above is not enough information..=
..=20
=20
John :-#)#=20
--=20
(Please post followups or tech inquiries to the USENET newsgroup)=20
John's Jukes Ltd.=20
#7 - 3979 Marine Way, Burnaby, BC, Canada V5J 5E3=20
(604)872-5757 (Pinballs, Jukes, Video Games)=20
www.flippers.com=20
"Old pinballers never die, they just flip out."
i have a firebird 2 and i have the wires which are hooked at the buttons un= derneath but i dont know where they connect to on the=20
board no plug just the wires orange blue brown and green
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