Low Volume on Radio


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canal mark
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Low Volume on Radio

Postby canal mark » Sun Apr 10, 2011 9:29 am



1985 Aspencade. I still can't figure this radio out. I have replaced the amp with a working amp still no volume. I bypassed the auto volume control with no increase in sound. The mute button is not stuck and all the electrical seems to be working well. I have verified all the buttons and knobs on the radio are in the right place (I have tried every combination known to man). I got volume out of the radio one time when I bypassed the auto volume and played with the buttons on the auto volume after bypassing, but I can not make it happen again???? Does anyone know what the voltage output on the pin connectors should be. The manual has me using a sound generator, ocilliscope, and a nuclear reactor :-), of which I do not have. If anyone has any info on voltage outputs that would at least give me a place to start. I hate to replace this with an aftermarket and loose my handlebar controls, but if I have to I will. Any ideas would be greatly appreciated.



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WingAdmin
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Re: Low Volume on Radio

Postby WingAdmin » Sun Apr 10, 2011 9:22 pm

If you don't have a nuclear reactor or oscilloscope on hand (I have one of those two things, fortunately), you can just pull the thing out, send it to Sierra-MC, and for a flat $100 fee, they'll do all the work and fix it for you.

bruce skjordal
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Re: Low Volume on Radio

Postby bruce skjordal » Wed Apr 20, 2011 6:24 pm

here is a place in indiannapolis its called cycle re cycle the guy there can help u fix ur problem and and probly sell u what u will need he is a WIZARD HE KNOWS WHAT NO ONE ELSE DOEStrust me thx they close at 6pm on week dayhere is the number to call if u want 1 317 634 7550

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virgilmobile
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Re: Low Volume on Radio

Postby virgilmobile » Wed Apr 20, 2011 10:22 pm

I just tell them it's a proton thermal generator.That's similar to what I carry in my pouch::an electron consuming,photon generating,focally correctable,filament device.

Mag light

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virgilmobile
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Re: Low Volume on Radio

Postby virgilmobile » Wed Apr 20, 2011 10:48 pm

What test equipment do you have?digital volt meter,analog volt meter,12 volt test probe,clip leads.A cheap analog meter is helpful in tracing audio signals(audio is AC in nature)a cheap set of headphones and clip leads can also be used to listen for low level audio,which is what you would find at the input to the amp,and is the starting point.Separate the system,Radio(low level audio out),mixer magic box(radio input,CB input,headset input,etc.,output to the amp,and then the speakers.I don't know about your buttons but,I know if the CB squelch is set low and it's volume is low,it will mute the radio.This also applies to any VOX (intercom setting).

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virgilmobile
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83 GL1100 standard
84 GL 1200 I

Re: Low Volume on Radio

Postby virgilmobile » Thu Apr 21, 2011 9:46 am

How did you "bypass"the auto volume?This will help me diagnose what happened.The DIN plug has 12volt,ground,2 audio lines.The auto volume(I think)can be removed from the circuit by unplugging the DIN plugs and joining them together.Remember,there is a terminal component box that the audio must get through before it gets to the amp.Use headphones(or old earbuds),ground the first ring,clip lead to the tip.This is a cheap audio tester.Turn it on and probe the audio line,NOT the speaker wires.Also,the power amp requires 2 voltage sources.
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canal mark
Posts: 13
Joined: Sun Mar 28, 2010 10:18 pm
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Re: Low Volume on Radio

Postby canal mark » Thu Apr 21, 2011 2:25 pm

Thanks for all the help guys! It turned out to be the amp after all. I now have tunes and life is good :D




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