Have you tried a different 3.5mm stereo audio cable to connect the phone to the amplifier in case the plug on the audio cable has worn down?
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Try using an [https://www.ebay.com/itm/254821162715?_trkparms=ispr%3D1&hash=item3b54865edb:g:2h8AAOSwmkFezpst&amdata=enc%3AAQAGAAAA8L3DTW%2FbJae18ifssxhoog4rgXLTxiiTIyR%2BrBQumwLQqjX2K8KwS7L%2BBvQbN70SvK9Xqq7Ta%2BBFgufoITUiSUYTIuzQZMxe%2FkwZmG0VA%2FNmuqeTkMnjlO2%2Fj5ytMd5HiUKcFD99kIMCpd7GfY6ih%2FR1WuDazIxY8M14Ov%2FsyV5tJFKNTCnxx77gllkjBfzdJjR%2BLHlB2aDfeB3ONvoFGn7wN4tkAw5t2KL8L1Xi7%2Bekf%2BC7aQAQvxvg4rUNcHSe%2BtNnZ6L6ou7SyDjdoCXnW88UcIndAXzW%2BoTB0r0%2FNxIEOq4LcscueneyMKp3%2FQUiWw%3D%3D%7Ctkp%3ABFBM7sGzpLxf|adapter] to connect the amplifier to the phone.
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Try using an [link|https://www.ebay.com/itm/254821162715?_trkparms=ispr%3D1&hash=item3b54865edb:g:2h8AAOSwmkFezpst&amdata=enc%3AAQAGAAAA8L3DTW%2FbJae18ifssxhoog4rgXLTxiiTIyR%2BrBQumwLQqjX2K8KwS7L%2BBvQbN70SvK9Xqq7Ta%2BBFgufoITUiSUYTIuzQZMxe%2FkwZmG0VA%2FNmuqeTkMnjlO2%2Fj5ytMd5HiUKcFD99kIMCpd7GfY6ih%2FR1WuDazIxY8M14Ov%2FsyV5tJFKNTCnxx77gllkjBfzdJjR%2BLHlB2aDfeB3ONvoFGn7wN4tkAw5t2KL8L1Xi7%2Bekf%2BC7aQAQvxvg4rUNcHSe%2BtNnZ6L6ou7SyDjdoCXnW88UcIndAXzW%2BoTB0r0%2FNxIEOq4LcscueneyMKp3%2FQUiWw%3D%3D%7Ctkp%3ABFBM7sGzpLxf|adapter] to connect the amplifier to the phone. Plug the adapter into the phone and the amplifier stereo cable into the adapter.
The phone has a 4 pole headphone socket i.e. L & R speakers, microphone and earth (or common) whereas the aux stereo cable most probably uses a 3 pole plug i.e. L & R speakers and earth (or common) and over time the spring in the headphone jack in the phone which detects that a plug has been inserted loses tension and it won’t operate because the incorrect plug has been inserted.
When the correct plug i.e. 4 pole, is inserted it should work as that is what the phone’s headphone socket is designed for
Hi @alexey_nla
Have you tried a different 3.5mm stereo audio cable to connect the phone to the amplifier in case the plug on the audio cable has worn down?
Try using an [https://www.ebay.com/itm/254821162715?_trkparms=ispr%3D1&hash=item3b54865edb:g:2h8AAOSwmkFezpst&amdata=enc%3AAQAGAAAA8L3DTW%2FbJae18ifssxhoog4rgXLTxiiTIyR%2BrBQumwLQqjX2K8KwS7L%2BBvQbN70SvK9Xqq7Ta%2BBFgufoITUiSUYTIuzQZMxe%2FkwZmG0VA%2FNmuqeTkMnjlO2%2Fj5ytMd5HiUKcFD99kIMCpd7GfY6ih%2FR1WuDazIxY8M14Ov%2FsyV5tJFKNTCnxx77gllkjBfzdJjR%2BLHlB2aDfeB3ONvoFGn7wN4tkAw5t2KL8L1Xi7%2Bekf%2BC7aQAQvxvg4rUNcHSe%2BtNnZ6L6ou7SyDjdoCXnW88UcIndAXzW%2BoTB0r0%2FNxIEOq4LcscueneyMKp3%2FQUiWw%3D%3D%7Ctkp%3ABFBM7sGzpLxf|adapter] to connect the amplifier to the phone.
The phone has a 4 pole headphone socket i.e. L & R speakers, microphone and earth (or common) whereas the aux stereo cable most probably uses a 3 pole plug i.e. L & R speakers and earth (or common) and over time the spring in the headphone jack in the phone which detects that a plug has been inserted loses tension and it won’t operate because the incorrect plug has been inserted.
When the correct plug i.e. 4 pole, is inserted it should work as that is what the phone’s headphone socket is designed for