I took out my microphone after quite a while of not using it... it had been left on with the battery inside, and the battery had corroded. Now it doesn't seem to be working. Is there a way to clean the contacts so that it can work again, or do I have a (very nice) ruined microphone?
My experience with repairing Sony microphones for a television station is that once the battery corrosion eats the copper anywhere within the mic, the circuit (not the mic) is toast. I would send it in to Sony direct as they will have the parts and expertise to turn this around quickly for you.
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You need to look at the circuit board, it is quite likely that the corrosion ate circuit paths. They are fixable but this amounts to microsurgery. If you are lucky, only the power path connecting the battery contacts is bad. Are the wires to the battery contacts intact? Use tweezers to assess this. Sadly, this damage is generally considered fatal and fixes fall into the category of personal grudge or sheer boredom.
Shure SM58 is not a wireless microphone, so clarify me the exact model for your wireless device in order to help you.
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After drilling each leg to remove my corroded batteries I found that each leg isa push fit allowing it to seperate from the body thus allowing a screwdriver to be pushed thru releasing the corroded batteries. Re-assemble assuring a tight fit to make connection and it works well. Good luck I was drilling 1 leg for hours and the other 2 took ten minutes.
The SM58 is a very rugged and reliable microphone and there are not many things to go wrong with it.
Assuming that you have tried using a different cable / amplifier to issolat ethe problem to teh microphone itself the most likely things are.
A wire has come off inside - gently unscrew the top of the mic - lift it off carefully lift because the wires inside are quite short.
A broken capsule - this usually results from dropping the mic on hard surfaces. Replacement capsules can be bought quite cheaply.Just tak careful note of the wiring order before disconnecting the old one.
Go to Radioshack and buy DEOXIT.. its made to clean oxidation (corrosion) and is electronic safe. If the corrosion (oxidation) didnt leak into the circuit board this will allow you to get proper contact again
This problem is frequently due to corroded battery terminals inside the
camera. Remove the batteries and wipe the terminals with a soft cloth
(heavy corrosion may require a fine wire brush, steel wool, or
sandpaper). Remove any residue left in the camera by the cleaning.
Clean the terminals on the batteries in the same manner, and then
replace them in the camera. This cures most problems, but if it
doesn't work for you, check the Kodak troubleshooting guide at: