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September 07, 2010, 01:53:36 PM

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Author Topic: Microphone jack/port not working  (Read 91 times)
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dcman
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« on: September 02, 2010, 08:35:56 AM »


Hi guys,

I have a canon hv20, and my microphone (a Rode Videomic) keeps unseating and causign audio dropouts.  I called a repair company, thinking the Rode mic jack had just worn out, but they suggested it may be a problem with the camcorder microphone line-in port, and described a spring-loaded part at the bottom of the port that may be corroded or that the spring is jamming.  Does anyone know a fix for this kind of problem?  My plan is to try to spray in some canned air, but wanted to know if anyone else has had similar issues.  My only other option is a full-out repair.

Cheers!

dcman
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Digidave
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« Reply #1 on: September 02, 2010, 09:32:37 AM »

A couple of ideas here.

It's probable the jack socket contacts have become dirty. If you can, find a spare jack plug and push it in and out a few times to scrape them clean.

If that doesn't work, spray in a little contact cleaner, it's often called switch cleaner, then do the plug trick again. Leave the cam a few hours before powering up. The stuff is fairly volatile, but best be careful. I suppose you could spray it on the plug instead of in the socket.

Don't insert anything other than a jack plug into the socket, it's 99% certain that if it wasn't broken before, it will be after! And don't use any cleaner not designed for electrical contacts.

Canned air is not a good idea, the propellant could cause problems.

Dave
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dcman
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« Reply #2 on: September 02, 2010, 11:53:02 AM »


Thank you!  I will pick up the contact cleaner and give that a shot.  If anyone else has other suggestions, I'm certainly open to them as well.  Hopefully this will get it working again without too much of a fuss.

Happy belated birthday Digidave!

dcman
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Guy Bruner
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« Reply #3 on: September 02, 2010, 01:42:09 PM »

Dan, when you say it becomes "unseated," does it physically pop out of the jack and have to be pushed back in?  Or, does it stay fully inserted and you get dropouts?

If it is popping out, it may very well be the spring clip.  The camcorder would have to be disassembled and the jack replaced.  It doesn't hurt to try cleaning, though.

If it stays inserted, it is possible that the mic cable has a broken wire, especially if you can get the audio to drop out by wiggling the cable.
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dcman
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« Reply #4 on: September 02, 2010, 03:18:49 PM »


The cable is not popping out, it stays inserted and I get dropouts.

My uneducated guess is that it is not the cable.  Fiddling with the cable doesn't seem to have much effect (though I will test more this weekend to be sure), but pushing or turning the plastic head around the pin, in essence adding some additional pressure to the microphone pin, seems to work at least temporarily.

In truth, I'm not wholly convinced the problem is NOT with the Rode, but I think it is fair to consider the Rode warranty customer service rep. when he presents a possible problem with the camera and not the microphone and there is an easy way to test it.  My plan at this point is to try the contact cleaner and to do some more testing on the cable (just to be sure), as well as using a second microphone for comparison (a stereo mic I don't use often).  If that fails, I'll call the Rode warranty folks back and make my case.  If it is the camera and the home repair doesn't work, I'm in the unenviable position of having a camcorder that needs repair, so I'm keeping my fingers crossed.

Thanks again everyone!

dcman
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Chris Harding
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« Reply #5 on: September 02, 2010, 07:42:29 PM »

Hi DCMan

It's probably a good idea to see if you can plug the Rode into another device??? That way you are assured that the Rode is OK and the fault lies in the camera jack socket.

I admit that I wasn't too impressed with the Rode curly cords and plugs!! I needed to go to XLR anyway so I decided to replace the entire cable with a better quality cable before putting an XLR plug on the end. 3.5mm minijack plugs can easily fall apart so it MIGHT be a plug issue as it gets more physical abuse than the socket!!

Finally a silly question BUT have you put a new battery in the Rode??? Clean the battery clips with a little bit of alcohol and pop in a fresh 9v battery. I use a little lav mic for Realty shoots and it was giving me absolute headaches with sudden dropouts and I found the little button battery was the problem!!!

Chris
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2 x Panasonic HMC72 with Rode VideoMic on each Vegas 9.0 for editing and DVDLab for authoring.

www.softweigh.com/video/diy.html
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