Question about Bose QuietComfort 2 Consumer Headphones

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No Sound/No Power

I have a Bose headset Model OC2. I removed a dead AAA battery which was somewhat corroded on the positive terminal. I had not used the headset for 2 or 3 years. Replacing the battery does not get me power or sound. There is no visible damage to the battery compartment. The contacts seem to be ok, but how do I clean them just in case corrosion is the problem. If cleaning doesn't work, what then?

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Hello, I see you have a set of headphones that are inoperative. You can take a peice of aluminum foil the heavy duty type and scrub the contacts to clean the terminals.If you have a figernail emery board that will work also. If that doesnt work you will either have a wire corroded into also and you will have to take apart, or either take to a local small radio repair shop and let them repair the wire.Thank you

Posted on Feb 28, 2009

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Sand paper of file are best to clean battery terminals metal.
Make sure that leakage of battery has not reached to circuit board of headset.

Posted on Feb 28, 2009

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Try cleaning with the isoprophyll alcohol available at local medical stores.and use tissue for cleaning.

Posted on Feb 28, 2009

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Hey, you need to clean the contacts, you can use almost anything todo this.

Posted on Feb 28, 2009

  • Ekse Feb 28, 2009

    use the end of a pencil, the eraser end, or vinegar remember to dry it.

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1 Answer

I have lost sound in the left earcup of my Bose QC3 headphones, although sound comes from the right earcup. How should I proceed to fix it?


The solution to this problem is not for the faint hearted. You will break your headset, you will void your warranty, and you quite likely will end up with a non-working headset. You will also have to solder very small electrical components.

I also had the left channel audio not working, so the first thing to do was to take apart the headset.

Step 1. Remove the battery. Remove the two tiny screws from under the u-shaped plastic piece that holds the earpiece to the headset. You will have to pop out the end furthest from the audio jack. A #0 phillips is needed. Put the tiny screws in a safe place.

Step 2, Break the silver cover free from the black plastic earpiece by sliding a flat blade screw driver down between the joint towards the bottom of the earpiece. Be very careful not to insert the screwdriver blade too far into the earpiece because the circuit board is just inside. For some reason Bose decided to glue the two attachments for the bottom of the silver cover to the earpiece.

Step 3. Unscrew the 3 screws holding down the circuit board and put them in a safe place. Gently pull up the circuit board about .5cm. Look at the audio jack, the tab on the circuit board on the bottom right is the left channel audio. You can try to reflow the solder at this point on that tab using a 25W iron. It didn't work for me, but if your connector is not as bad a mine, it might work.

Step 4. Remove the solder from the 4 tabs holding the audio jack to the circuit board. Remove the audio jack from the circuit board (this is hard and accompanied by much cursing). Try not to overheat the board and lift the lands. Use a pliers to pull out the contact for the left audio channel and bend the jack contact out 1mm or so. Insert it back into the audio jack. Get your audio cord, plug it into the jack and check and see if you have continuity with an ohmmeter. If it all checks out, continue on.

Step 5. Resolder the audio jack back into the circuit board (also accompanied by much cursing). Screw the circuit board down. Put the battery back in and see if everything still works. If it doesn't, check to see if you broke the fine wires just above the audio jack on the circuit board. They run to the other earpiece through the headset.

Step 6. Reassemble everything and see if it still works. If it does, then congratulations and enjoy your restored audio. If not, open it back up and look for broken wires.

Disclaimer: This solution will likely destroy your headset. Proceed only if you have experience working with modern surface mount parts. I am an electrical engineer with 30 years experience in troubleshooting and repairing electronics and it still was not an easy fix. Total time to repair was about 4 hours.

Dec 13, 2010 | Bose QuietComfort 3 Acoustic Noise...

1 Answer

One headphone is not working. no sound is coming.


pull the plgu of your headset partially from the jack play around it until the other headphone produces sound if this happens it mieans that the Audio port your using is either malfunctioning or you can try youy headset with an MP3 player or any audio device that uses a headset to find out if it is the headset that is damaged

Jun 05, 2010 | Bose QuietComfort 3 Acoustic Noise...

1 Answer

How can I fix an intermittent sound problem on the left ear piece of the Tri-port on ear Bose Headphones? If I take the ear cushion off and touch the speaker inside the ear piece on the headset using a...


I have the same problem. The first one that I bought last 1 year. I bought another one and the same problem has appeared today. I think this is because they are assembled in China. Cheap and low quality manufacturer that is sold at very high prices.

Apr 01, 2010 | Bose on-ear TriPort Headphones

1 Answer

RCA headphones - nicad or alkaline batteries WHP141


BATTERY INSTALLATION AND INFORMATION
Your wireless headphone unit requires two rechargeable AAA batteries.
Rechargeable batteries are uncharged when you purchase them. Before
you can use the wireless headphones, the batteries must be charged for
16 hours. Follow these steps to install and charge the batteries.
Installing the Rechargeable Batteries
Take care to follow these steps to correctly install the batteries.
1. On the right headphone, locate the battery compartment (1).
Use the finger depression on the compartment to turn the battery
compartment cover counterclockwise to remove the cover.
2. Insert two AAA rechargeable batteries, carefully following the
markings inside to ensure the batteries are inserted properly, with
the + and - ends in the correct positions.
3. Replace the battery compartment cover.
Charging the Rechargeable Batteries
To recharge the headset unit, follow the directions below. Note: The
cradle/transmitter on the WHP141 is not a recharging cradle, although
you may place the headset in the cradle during recharging.
Follow these steps to recharge the NiMH rechargeable batteries.
1. Make sure the ON/OFF switch (2), located on the right headphone,
is in the OFF position.
2. Connect the AC/DC main power adapter to the DC IN power
supply socket (11), located on the back of the cradle/transmitter.
3. Plug the adapter into an electrical outlet.
4. Connect the charging cable (10), located on the back of the
cradle/transmitter to the recharging input (3), located on the right
headphone. The headphones can either be placed in the
cradle/transmitter or placed next to the unit. If the headphones are
connected correctly, the charging LED indicator light on the
cradle/transmitter (8) illuminate.

Mar 27, 2009 | RCA WHP141 Consumer Headphones

2 Answers

There in no green light on RS 120. There is a red light on indicating that the headphone is being charged. Why I cannot use non-chargeable AAA batteries?


The green light only comes on when it is receiving an audio signal.

Standard batteries will work.. if you NEVER use the charging station.. and plan on replacing them every x number of hours used.. IMPORTANT.. if you forget.. and place the headset on the charging station with standard batteries.. they will probably rupture.. and may well ruin the headset..

If you decide to replace the chargable batteries.. make sure you replace them with the right size and type..

Jan 08, 2009 | Sennheiser RS 120 Consumer Headphones

2 Answers

No Sound/No Power


I used your site to research the problem further. I found an answer which recommended rubbing the suspect terminal lightly with a pencil eraser. It worked! I now have battery power and my headset works fine.

Nov 30, 2008 | Bose QuietComfort 2 Consumer Headphones

4 Answers

Innovage Wireless Headphones and FM scan radio


There was 2 screws at the bottom of the headset just below the name of the headset. Remove those screws and u can include 2 AAA batteries there. Happy Listening!!! Rajesh

Oct 13, 2008 | Audiovox JW-120 Consumer Headphones

1 Answer

Batteries


You need to remove the rubber on each side of the headset - and you will need to replace one "AAA" battery on each side - hope this helps

Aug 25, 2008 | Sharper Image (CT411) Consumer Headphones

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