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Tech: Please Help / NSM Firebird Jukebox Volume Issue
Hello, i just bought an NSM Firebird wallbox that had no manual & i am
not happy with the volume i am getting from it. I am using Yamaha bookshelf 8 ohm speakers and have the neg hooked to terminal 0 and the pos to terminal 5 on each side of the transformer. I would say the Volume is pretty low and when i try to turn the volume up or down using the volume on the control board it does nothing to help the matter. I also noticed the 3 buttons on the bottom of the box also do not raise or lower the volume. So basically, right now i am stuck with a fixed volume. I tried hooking the wires direct to the amp bypassing the transformer but this also did not help. Do you think i need a new transformer and would this solve my problem? I see some newer boxes have a 7 lug transformer as well. Would that one give me more volume and would it work in my firebird wall box? Sorry about all the questions but i am not sure what the problem is nor what the transformers function truly is? The guy i bought it from knows nothing about the box at all. Thanks for any help regarding this matter! Mike in FL |
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Tech: Please Help / NSM Firebird Jukebox Volume Issue
On Jun 12, 2:29*pm, postman516 wrote:
Hello, i just bought an NSM Firebird wallbox that had no manual & i am not happy with the volume i am getting from it. I am using Yamaha bookshelf 8 ohm speakers and have the neg hooked to terminal 0 and the pos to terminal 5 on each side of the transformer. I would say the Volume is pretty low and when i try to turn the volume up or down using the volume on the control board it does nothing to help the matter. I also noticed the 3 buttons on the bottom of the box also do not raise or lower the volume. So basically, right now i am stuck with a fixed volume. I tried hooking the wires direct to the amp bypassing the transformer but this also did not help. Do you think i need a new transformer and would this solve my problem? I see some newer boxes have a 7 lug transformer as well. Would that one give me more volume and would it work in my firebird wall box? Sorry about all the questions but i am not sure what the problem is nor what the transformers function truly is? The guy i bought it from knows nothing about the box at all. Thanks for any help regarding this matter! Mike in FL The transformers are probably the output transformers for the amplifier. The taps represent wattage levels, that are used to match speakers (or series/parallel groups of speakers) to the amplifier and avoid overloading it. The transformer probably generates a 70v / 100v line for 500 ohm PA type speakers too. (these will have a transformer on the back of them with wattage taps on them.) I doubt that the transformer is a problem, the sound would probably be distorted / overloaded. In other brands, I have NEVER had an output transformer fail on a solid state amp. You can disconnect it from the amp and run a speaker direct if you want, just to eliminate it. The other possibility is blown output stage, this can result in low volumes, but there would be distortion, and probably blown fuses to the output transistors. I don't know how the volume control system works on these things. If it is done with buttons, it either drives a motorised pot, (this should be visibly connected to the amplifier / preamp board) or runs via the CPU or to the amp, and then to a "volume control" IC on the Amplifier Preamp board. it may also run to the amp, and control the volume directly via a special IC. Either way, something along this chain is broken, you will need a schematic or to identify and look up preamp the IC part numbers on the web and identify how it all works and deal with it from there. |
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Tech: Please Help / NSM Firebird Jukebox Volume Issue
On Jun 12, 7:43�am, KR wrote:
On Jun 12, 2:29�pm, postman516 wrote: Hello, i just bought an NSM Firebird wallbox that had no manual & i am not happy with the volume i am getting from it. I am using Yamaha bookshelf 8 ohm speakers and have the neg hooked to terminal 0 and the pos to terminal 5 on each side of the transformer. I would say the Volume is pretty low and when i try to turn the volume up or down using the volume on the control board it does nothing to help the matter. I also noticed the 3 buttons on the bottom of the box also do not raise or lower the volume. So basically, right now i am stuck with a fixed volume. I tried hooking the wires direct to the amp bypassing the transformer but this also did not help. Do you think i need a new transformer and would this solve my problem? I see some newer boxes have a 7 lug transformer as well. Would that one give me more volume and would it work in my firebird wall box? Sorry about all the questions but i am not sure what the problem is nor what the transformers function truly is? The guy i bought it from knows nothing about the box at all. Thanks for any help regarding this matter! Mike in FL The transformers are probably the output transformers for the amplifier. �The taps represent wattage levels, that are used to match speakers (or series/parallel groups of speakers) to the amplifier and avoid overloading it. The transformer probably generates a 70v / 100v line for 500 ohm PA type speakers too. (these will have a transformer on the back of them with wattage taps on them.) I doubt that the transformer is a problem, the sound would probably be distorted / overloaded. In other brands, I have NEVER had an output transformer fail on a solid state amp. �You can disconnect it from the amp and run a speaker direct if you want, just to eliminate it. The other possibility is blown output stage, this can result in low volumes, but there would be distortion, and probably blown fuses to the output transistors. I don't know how the volume control system works on these things. If it is done with buttons, it either drives a motorised pot, (this should be visibly connected to the amplifier / preamp board) �or runs via the CPU or to the amp, �and then to a "volume control" IC on the Amplifier Preamp board. �it may also run to the amp, and control the volume directly via a special IC. Either way, something along this chain is broken, you will need a schematic or to identify and look up preamp the IC part numbers on the web and identify how it all works and deal with it from there.- Hide quoted text - - Show quoted text - I have found a wire harness that was cut and left in the box that has 4 wires in it brown, blue, green and orange. They connect to the vol up, vol down & the cancel button at the bottom of the box but i do not see anyplace that they would connect at? I was looking at possibly St-206 on the preamp board as that is open on my box and has four pins. Can anyone take a look at and let me know if i should have a connector on at St-206 and what order the colors should be from top to bottom, it would be much appreciated. Thanks alot for your help! Mike in Fl P.S. This box is the original firebird & has Es-IV boards in it |
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Tech: Please Help / NSM Firebird Jukebox Volume Issue
On 13 Jun., 01:20, postman516 wrote:
On Jun 12, 7:43 am, KR wrote: On Jun 12, 2:29 pm, postman516 wrote: Hello, i just bought an NSM Firebird wallbox that had no manual & i am not happy with the volume i am getting from it. I am using Yamaha bookshelf 8 ohm speakers and have the neg hooked to terminal 0 and the pos to terminal 5 on each side of the transformer. I would say the Volume is pretty low and when i try to turn the volume up or down using the volume on the control board it does nothing to help the matter. I also noticed the 3 buttons on the bottom of the box also do not raise or lower the volume. So basically, right now i am stuck with a fixed volume. I tried hooking the wires direct to the amp bypassing the transformer but this also did not help. Do you think i need a new transformer and would this solve my problem? I see some newer boxes have a 7 lug transformer as well. Would that one give me more volume and would it work in my firebird wall box? Sorry about all the questions but i am not sure what the problem is nor what the transformers function truly is? The guy i bought it from knows nothing about the box at all. Thanks for any help regarding this matter! Mike in FL The transformers are probably the output transformers for the amplifier. The taps represent wattage levels, that are used to match speakers (or series/parallel groups of speakers) to the amplifier and avoid overloading it. The transformer probably generates a 70v / 100v line for 500 ohm PA type speakers too. (these will have a transformer on the back of them with wattage taps on them.) I doubt that the transformer is a problem, the sound would probably be distorted / overloaded. In other brands, I have NEVER had an output transformer fail on a solid state amp. You can disconnect it from the amp and run a speaker direct if you want, just to eliminate it. The other possibility is blown output stage, this can result in low volumes, but there would be distortion, and probably blown fuses to the output transistors. I don't know how the volume control system works on these things. If it is done with buttons, it either drives a motorised pot, (this should be visibly connected to the amplifier / preamp board) or runs via the CPU or to the amp, and then to a "volume control" IC on the Amplifier Preamp board. it may also run to the amp, and control the volume directly via a special IC. Either way, something along this chain is broken, you will need a schematic or to identify and look up preamp the IC part numbers on the web and identify how it all works and deal with it from there.- Hide quoted text - - Show quoted text - I have found a wire harness that was cut and left in the box that has 4 wires in it brown, blue, green and orange. They connect to the vol up, vol down & the cancel button at the bottom of the box but i do not see anyplace that they would connect at? I was looking at possibly St-206 on the preamp board as that is open on my box and has four pins. Can anyone take a look at *and let me know if i should have a connector on at St-206 and what order the colors should be from top to bottom, it would be much appreciated. Thanks alot for your help! Mike in Fl P.S. This box is the original firebird & has Es-IV boards in it- Zitierten Text ausblenden - - Zitierten Text anzeigen - check out this one http://www.cdadapter.com/download/nsmcode4.pdf regards Ron |
#5
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Tech: Please Help / NSM Firebird Jukebox Volume Issue
On Aug 1, 6:37*am, McDuseldick wrote:
On 13 Jun., 01:20, postman516 wrote: On Jun 12, 7:43 am, KR wrote: On Jun 12, 2:29 pm, postman516 wrote: Hello, i just bought an NSM Firebird wallbox that had no manual & i am not happy with the volume i am getting from it. I am using Yamaha bookshelf 8 ohm speakers and have the neg hooked to terminal 0 and the pos to terminal 5 on each side of the transformer. I would say the Volume is pretty low and when i try to turn the volume up or down using the volume on the control board it does nothing to help the matter. I also noticed the 3 buttons on the bottom of the box also do not raise or lower the volume. So basically, right now i am stuck with a fixed volume. I tried hooking the wires direct to the amp bypassing the transformer but this also did not help. Do you think i need a new transformer and would this solve my problem? I see some newer boxes have a 7 lug transformer as well. Would that one give me more volume and would it work in my firebird wall box? Sorry about all the questions but i am not sure what the problem is nor what the transformers function truly is? The guy i bought it from knows nothing about the box at all. Thanks for any help regarding this matter! Mike in FL The transformers are probably the output transformers for the amplifier. The taps represent wattage levels, that are used to match speakers (or series/parallel groups of speakers) to the amplifier and avoid overloading it. The transformer probably generates a 70v / 100v line for 500 ohm PA type speakers too.. (these will have a transformer on the back of them with wattage taps on them.) I doubt that the transformer is a problem, the sound would probably be distorted / overloaded. In other brands, I have NEVER had an output transformer fail on a solid state amp. You can disconnect it from the amp and run a speaker direct if you want, just to eliminate it. The other possibility is blown output stage, this can result in low volumes, but there would be distortion, and probably blown fuses to the output transistors. I don't know how the volume control system works on these things. If it is done with buttons, it either drives a motorised pot, (this should be visibly connected to the amplifier / preamp board) or runs via the CPU or to the amp, and then to a "volume control" IC on the Amplifier Preamp board. it may also run to the amp, and control the volume directly via a special IC. Either way, something along this chain is broken, you will need a schematic or to identify and look up preamp the IC part numbers on the web and identify how it all works and deal with it from there.- Hide quoted text - - Show quoted text - I have found a wire harness that was cut and left in the box that has 4 wires in it brown, blue, green and orange. They connect to the vol up, vol down & the cancel button at the bottom of the box but i do not see anyplace that they would connect at? I was looking at possibly St-206 on the preamp board as that is open on my box and has four pins. Can anyone take a look at *and let me know if i should have a connector on at St-206 and what order the colors should be from top to bottom, it would be much appreciated. Thanks alot for your help! Mike in Fl P.S. This box is the original firebird & has Es-IV boards in it- Zitierten Text ausblenden - - Zitierten Text anzeigen - check out this one http://www.cdadapter.com/download/nsmcode4.pdf regards Ron- Hide quoted text - - Show quoted text - Mike, The vol. control in the box connects to the central computer at ST 206. If you had a remote vol. control it would connect to ST 205, with a 5-wire connection. As for connections, pin 1 is orange, pin 2 - green, pin 3 - brown and pin 4 - black. Don't have any Firebirds here, otherwise I'd take a pic. but still have manuals. Hope this helps, Gene |
#6
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Quote:
Also check service code P28 for max volume. Settings range from 1 to 31. Enter service by pulling out on the switch at the top right of inside the door. It will place it into service mode. Press "C" the "28" then "H". this will display the current settings. By default it is "31" "28" (normal and background levels) If it is not, press "31" and "H". This should change the regular volume to a max of 31. Now try the switches on the bottom. |
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