Sennheiser Water Damage- help!!!!

Elisa Leahy

Freshman
Apr 29, 2014
3
0
0
Hello, audio geniuses. What I know of audio equipment is what I have picked up by necessity as a documentary filmmaker. As a cinematographer, my love is in images not sound.
I'm currently filming in the Andes mountains until June on a very low budget doc. I also do some filming in Lima and I just got back from a disastrous shoot there. One of my subjects got a bit tipsy and ventured too close to the water while wearing my RODE lav and Sennheiser ew100 G3 transmitter. As I was yelling to him to bring back the mic he was plastered by a wave.

I dried everything the best I could, but I did not have access to a trox screwdriver so I haven't been able to open up the transmitter. I did the 'bag of rice' trick and after 24 hrs the transmitter turned on like a charm, but I can't pick up any sound when I hook up the system.

I use a Beacktek audio adapter which is still functioning fine with our shotgun. I have hooked up the Sennheiser lav mic that came with the transmitter/receiver to see if the RODE mic was the problem, but can't get anything from that either.

It seems the transmitter is picking something up, the AF level on the screen is definitely moving. But the level on the receiver isn't.

Living in the Andes definitely puts me at a disadvantage when it comes to tech repair. There is obviously no Sennheiser technician anywhere within several plane flights of me. I'm trying to determine if I could take it to a standard electrician or someone who may be able to open it up and do something. But I'd really like to understand more first about what the problem could be.

Also, I believe my brilliance with the rice could have adverse effects. I can hear grains inside when I shake the transmitter.

Any ideas???
 
Re: Sennheiser Water Damage- help!!!!

Hi Elisa,

Often, a jeweler's screwdriver of the right size can fit the splines of a Torx head well enough to turn the screw.

You need to get the transmitter open and dry ASAP, before any corrosion of the components sets in. Salt water can do major damage very quickly. If corrosion has begun, you may be able to burnish it away with a glass fiber brush or small bits of Scotch-brite pad. Clean all components thoroughly with distilled water and completely dry them before reassembly.

It's a bad idea to power up any electronics that are possibly damp inside, as this may damage components.

Dry rice inside is unlikely to cause an electronic failure, although it could be a problem after it absorbs moisture.

Good luck!
 
Re: Sennheiser Water Damage- help!!!!

As a quick test to see if it was maybe just the mic that was damaged. I would (assuming the transmitter is completely dry) Plug the mic into the beltpack and look to see if the receiver was reading any audio. It should show a brief peak in noise when plugging in the connector.
 
Re: Sennheiser Water Damage- help!!!!

Ben, I've tried the transmitter with 2 different mics and I am getting audio levels on the transmitter just nothing in the receiver. So I'm pretty sure my RODE mic is okay, thankfully.

Jason, thanks, that info was very close to what an electrician here suggested. I managed to get a screwdriver and open it up. There was corrosion in a few patches. Following the advice from my tech/electrician guy, I cleaned it with benzine and a toothbrush. Hope that was okay.

The inside looks good now, but I am still not getting anything in the receiver. The corrosion might have done its damage already.
 
Re: Sennheiser Water Damage- help!!!!

Salt water will cause nearly immediate corrosion of metal. The amounts of metal in circuit traces is extremely minimal, so chances of permanent damage are pretty high. If you ever get submersed in salt water, the best thing to do is immediately re-immerse into distilled water to rinse out any of the salt. If there is still salt in there, the corrosion will continue to get worse.
 
Re: Sennheiser Water Damage- help!!!!

I suspect there's nothing left to do but order a new one. Thankfully, I have someone traveling this way who can bring it to me.
Brian, thanks for the info about the distilled water rinse. Much as I hope to never be in this situation again, I will keep that in mind.