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Check all of the connections affecting the two channels. Speaker wires, inputs, outputs, etc. A poor connection can have resistance that will affect proper balance between channels.
Also check your volume and/or balance controls for proper tracking. With the unit completely turned off, turn the volume control many times from extreme counterclockwise position to clockwise position. Ditto for any and all speaker switches. If none of these steps clear up the anomaly you have a difference in gain between amps responsible for unequal outputs and the unit will need to be troubleshooted for bad cap and/or resistor causing the anomaly.
This is an educated guess.
You should have 4 rings around your 3.5mm connector. From the tip to the base of the connector....
#1 - left audio - Black
#2 - right audio - Red
#3 - Ground - bare copper
4# - Mic/volume - green/brown
The wires for the left and right channels (pins 1 and 2) and the ground, (pin 3) should run from the connector through the volume control, to each ear piece. The mic/volume wire should terminate at that control. although it could connect to more than one place within the control.
You may be able to open the volume control, gently, and see which wire stops there and which continue on through.
I hope this gives you enough information to complete your project.
The channel that is weak will either have a faulty transistor or a bad capacitor on it. Most engineers would test it by injecting signals into the circuit at different points. Working backwards from the front end. When the signal goes weak, you have found the faulty stage.
Hello,sounds as if its an older reciever and the control is simply dirty(dusty) . What i would recommend (if you can access it) is simply spraying contact cleaner into the control .Contact cleaner can be purchased at a radio shack or online ,just get a quick drying one and do it while its unplugged.
You could try to use a player with a stereo balance and adjust that, but in reality you need new headphones. Sonys have very comfortable and flexible cabling but the downside is that they wear out easily.
Before you worry about repair, verify that the balance control in the iPod isn't causing the problem. The easy way to do this is to try some other audio device (home stereo, etc).
Turn the balance control from left to right, The sound should fade from left to right in the same direction you turn the balance control. If it does not, then you got em on the wrong way about. They often fit better the right way around too.
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