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I've heard that the Auto volume on the 1200's often doesn't work. (Not surprising since it wasn't much good on the 1800 either) While tearing the bike down, cleaning it up and installing the J&M intercom junction unit I removed the auto volume module, cleaned all the connections and put it back together. Now even the tone function does little or nothing. Anyone have any direction concerning what fails on these units? I can unsolder and remove components from the PCB but I'm not keen on "easter egging" the job.
 

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Don't have a problem with mine, it seems to be one of those things (auto volume) that if it's working you don't notice it but when it isnt your always having to adjust the volume.
I dont think the auto volume has any control over the headset, only affects the external speakers.
The tone control works but thats one thing they shouldnt have bothered with.
I ride the bike, I have a little background music, I use the CB a lot, If I want a nice sound, I stay home and listen to music on my home system:)
My first wing was an 84 Interstate that I installed a radio in, having to reach for that volume control all the time as you rode faster and the noise level increased, then when you came to a stop having to dive for the volume control to turn it down....a royal pain..
Also the regular auto radio requires an extra amplifier for working on a bike. On my friends Interstate he says he can't hear the radio above 30 MPH.
 

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The voltage to increase or decrease the autovolume comes from the speedometer sensor on the fron wheel (left side). Very carefully, remove it and clean it out. It operates on a mechanical / electrical impulse generated with each turn of the gear off the axle shaft. If there is any dirt or dust accumulated in the box, the voltage output is weak and although the speedometer is working, there is not enough current to vary the volume control receiver for the radio.

Also, look at the volume control box again. Double check the connections for metal to metal contact and cleanliness.Also, pull the radio and inspect the slider receiver contacts in the back for the same thing.. They tend to get sloppy with time.. Re-tighten all connections and try the bike again. Let us know if that works or not.. There are other steps to test / inspect the autovolume system on these bikes.. Last but not least, the partsare available now and again on E-Bay. I've got an 86 Aspy, and would be lost without the auto volume controls...
 

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Thanks renegade, I'll be changing out the front tire in about a thousand miles I'll service the speedo drive then. I would guess that it sends out pulses that require an O-scope to read. I think my radio contacts are good because I have no static or dropout on bumpy roads. I think maybe my spray clean on the Tone Pot did it in because now when I rotate it I just get some low level intermittant noise and minimal tone change.

Does the auto volume work on the headsets or just speakers?
 

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If you take a look at the multichanger schematic although I am not an electronics tech, it looks like the auto volume control just affects the output to the power booster IE: radio\CB amplifier (left pocket right side)
 

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Good points about the sensor Renegade. BTW, that1200 smilie in your postdoes look remarkably like your own Wing. :D
 

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Well if auto Volume only works on the speakers I'm not too concerned about it since I always listen to headsets. I will however clean the speedo drive regardless. Any recomended special lube for the drive assy?
 

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OK I've got the Front wheel off and I'm looking at the speedo drive assy. Not much to it on the out side 2 cams that ride in 2 slots on the wheel. By cleaning the drive do you mean removing the 4 small screws on the black housing and cleaning the actual encoder assy? That would usually ruin an encoder but without doing that I don't see cleaning the cams doing much. The shop manual says to just clean it, no details.
 

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THANKS Tricky!!!!! At least now I have a benchmark to check. I'll have to see if I can dig up my ol Cheapo analog VM. Digitals don't do to well on these types of signals.
 
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