Question about RCA WHP140 Consumer Headphones
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I will assume you have tried tuning them via the control mounted on the headphones and still get nothing from the left ear.
First try a different channel setting on the base and retune the headphones.. if this doesn't fix it..
Check all your connections.. at the headphone base as well as the source.
Also I suggest trying them on a different source.
Since you did not mention what the source is.. I will make a few additional suggestions.
If plugged into an amplifier.. try repeated switching between output sources.. If the amp is playing fine through both speakers.. pick up an inexpensive adapter that will allow you to plug the red and white rca jacks into a headphone jack, then try HP output. (some RS 120 units shipped with this adapter)
If the source is the television itself check the connections on the back.. and check your balance settings on the sets main menu.
Depending on how old the headphones are along with frequency of use you may need new batteries.
Make sure the batteries are fully charged.. remove them and test the voltage.. they can do this for you at Radio Shack if you don't own a volt ohm meter or some other testing device.
Replacement batteries are not that expensive.. just make sure you replace them with the exact type (AAA - NiMH) and allow plenty of time for them to charge before use (overnight)
This last bit of advice I suggest caution.
You can put a fresh set of AAA standard batteries in the headphones and test them.. DO NOT PUT THE HEADPHONES ON THE CHARGING CRADLE with these batteries or you MAY DAMAGE THE HEADPHONES.
In fact I suggest you place a piece of tape or something on the cradle before you do this to remind you.. once you finish testing the headphones with standard non rechargeable batteries .. again trying different settings and tunings the set.. If they work .. you probably need a new set of rechargeable batteries..
This is a quick and dirty way of testing/comparing.. but REMOVE the standard batteries immediately after this test. Placing the headphones on the charging cradle with standard batteries in place could cause them to rupture and leak into the headphones.. so again.. be careful if you decide to test them in this fashion.
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