My SM57 stopped working. I opened it and the black wire is detached.I know which pin to solder it to on the capsule end but how do I get the wire to the XLR end? There is a filler material in the housing. So I'm wondering how to get access to the XLR pins.
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Re: Shure SM57 Wire broken off
On the XLR end, you should see a small screw hole. This screw is reverse threaded. In other words to make it go into the mic, you need to turn it counter-clockwise. Once that screw is inside the shaft, the XLR connector should come out. You may need to pull it out using needle-nose pliers. Pull carefully so you don't break the wires.
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There is no fuse. The capsule may be loose (on the end under the plastic wind screen). See is the phantom power is turned off on your mixer, if it is or is not working the mic will not work. Try a seperate connection, you may have a bad wire.
I'm assuming that you have tried the obvious stuff like using a different cable and a different amplifier?
The Shure beta 57a is a very robust and reliable dynamic microphone and there is very little to go wrong with it apart from
A wire broken off inside
A broken capsule - can be caused by dropping it
You can inspect for broken wires by very gently unscrewing the microphone head and peering inside - however the wiring is quite short so be careful not to pull any wires off in the process.
A broken capsule can be replaced - contact your local dealer for parts.
Once you remove the grill, there is a C-Clip that holds the cartridge down into the handle. Use some c-clip pliers to pull the c-clip out of the handle. The c-clip will remain around the post on the cartridge, but that's ok.
You need a multimeter to check this.
The black wire is customarily ground and should go to the pin that measures a dead short to the metallic case of the mike.
The red and blue wires are connected to the secondary of a balanced transformer and can be interchanged with no problem.
You can get a line drawing of the mike connector correctly identified in the user guide and that can be downloaded here:
Shure SM57 manual
If your talking about the coilwires on the diaphragm, you have to be very good at soldering with a variable temperature contolled soldering station, good magnifiers and pretty much one shot a doing it. You will have to carefully remove the varnish from the wires and bridge the broken gap with more of the same diameter wire. You are better off replacing the capsule. Hope this helps.
You might want to check the other end as well. Take a ohm meter and check the wires to make sure their is a reading on both.The wire you speak of is called shielded cable and there should be no reading between the sheilding and the center conductor when they are seperated from the capsule. If there is a reading you have a short.To clarify, the outer sheild should read at or near zero when you check @ each end as should the center conductor ( the white ) wire.There should be no reading between the two (the sheild and the white) when they are unhooded @ each end. Also when the capsule is unhooded you should get a reading between the two terminals, if not the capsule is open and needs replacement.
The wire coming from the switch if it has one will go to pin 2 as it is hot(+ve). Pin 3 is cold (-ve) and pin 1 is gound/shield which will make contact when the XLR connector is mounted back in the mike secured with the set screw. There should be a small hole in the side of the base of the mike that the set screw lines up with. Usind the correct size of flat bladed screw driver, back this screw out counter clockwise to secure the connector. If that is wrong, get back to me and i will hunt up my Shure wiring diagrams. If pin 2 and 3 are backwards the mike will be out of phase. Hope this helps.
Most likely cause is tiny copper windings from cartridge to the solder terminals has broken (dropped?). CAREFULLY check for a human hair sized wire leading from the cartridge to the solder terminals that may be broken. Soldering and general repair of these ultra fine wires should be performed by a steady hand and light touch. Once repaired, the capsule (element) itself should read 10-20 ohms when disconnected from the green / yellow wiring....Glen