“When using head phones via the head phone jack, must you plug into the jack and unplug when not using head phones, every time?”
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Hello peacock, According to the LG 55UM7300PUA owner's manual, it does not have a headphone jack. If you are referring to the red and white plugs in the back panel, they are inputs for composite AV cables and do not transmit audio out. If your headphones rely on a tv headphone audio out connection, a digital-to-analog decoder device with a headphone output would need to be purchased separately and connected to the digital optical audio out port. You may also need an optical splitter if you share the output with another device such as a soundbar. When the tv is set to Internal TV Speaker + Optical in sound settings, both the headphones and the tv speakers will receive the sound signal. Alternatively, setting it to Optical will transmit sound to the headphones and to a second sound device if you have a splitter. If your headphones have an on/off switch it is preferable to use that instead of plugging/unplugging the jack. Repeatedly pulling and inserting the headphone jack can damage the contacts. For this reason, it should stay plugged in if you use them regularly.
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