Quick Fix i. Phone Stuck in Headphones Mode Speakers Not Working. Ever had your i. Phone get stuck in Headphone mode The symptoms are fairly obvious you go to change the volume level and the little volume indicator says ringer headphones like shown below, and no audio our sound works through the normal speaker output. Autocad Civil 3D Line Types In Drafting on this page. The Art Of Electronics Horowitz &Amp' title='The Art Of Electronics Horowitz &Amp' />Some people interpret this as their i. Phone speakers suddenly not working or that something is broken, but that is actually pretty rare, and you can usually fix the issue really quickly with nothing but a q tip and a set of headphones or earbuds yes, you read that right, you will use a pair of headphones to get the i. Phone out of Headphone mode. I ran into this today and heres how I fixed it in about a minute. The Art Of Electronics Horowitz &Amp' title='The Art Of Electronics Horowitz &Amp' />On doit le terme damplificateur oprationnel Operational Amplifier en anglais John R. Ragazzini en 1947 8, 9. Les amplificateurs oprationnels ont t. Remove any case or enclosure the i. Phone may be in. Use compressed air or your mouth to blow directly into the headphone jack, this may help to dislodge dust or pocket lint stuck in the port. Get a Q Tip or toothpick and swab around inside the port to dislodge any remaining particles. Connect the set of headphones, make sure there is a complete connection and be sure that audio transmits through them, then firmly pull out the headphones audio should work as usual. Connect disconnect the headphones a few more times if nothing happens the first time. Doorking Dual Channel Loop Detector Manual. The i. Phone should be good to go now. Toggling the volume updown buttons should just show Ringer as its supposed to like the screenshot shows below, and audio will play out of the i. Phone speakers as usual. Why does this happen It could be a number of things, perhaps its just a weird software quirk where the i. Phone doesnt recognize that headphones have been disconnected from the jack that seems to be exacerbated by some protective cases that cause obstruction to the audio jack, thus why you should remove the case before trying any of this. It could even be something physical stuck in there like a piece of lint, thus the usage of blowing air in there and swabbing around with the q tip. Thankfully, its easy to fix in the vast majority of encounters, though there are some cases where Headphone mode gets stuck on after an i. Phone has had water contact which is probably why earlier i. The Art Of Electronics Horowitz &Amp' title='The Art Of Electronics Horowitz &Amp' />Phone models has water sensors in the headphone jack but if an i. Phone is properly handled after water contact you can usually save it from damage or any quirks like that. Having helped a reader resolve this problem a few weeks back, and then running into it myself, I figured it was worth a write up. So if you find your i. Phone speakers suddenly arent working and the headphones message is stuck on despite nothing attached to the phone, try the steps outlined above before calling Apple Support, it will probably work for you too. In elettronica, un amplificatore operazionale in inglese operational amplifier oppure opamp un amplificatore differenziale avente solitamente una sola uscita. Buy The Art of Electronics 3 by Paul Horowitz, Winfield Hill ISBN 0787721907244 from Amazons Book Store. Everyday low prices and free delivery on eligible orders. Reviews 114httpsen. Opamp hIDSERP,5111. Operational amplifier WikipediaAn operational amplifier often opamp or opamp is a DCcoupled highgain electronic voltage amplifier with a differential input and, usually, a singleended output.