![]() ![]() Ok was checking voltages at C6600/C6601 = 3.3v and pin 10 audio jack same, then checked back to R6322 missing board revision / R6324/R6325/C6212 all 3.3v checked PP3V3_SO_AUDIO_ANALOG =3.3v checked C6302 =1.5v fed from U6200 checked pins 1-6 as follows 1=1.5v 2=0v 3=1.2v 4=3.3v 5=0v 6=4.9v pins 1 and 3 should be 4.5v, checked capacitor C6203 connected to pin 3 and both sides shorted so removed, need to check R6200 and C6200 I think it should be 4.5v and not 3.3v I think going to pin 4 u6200Ĭhecked all components now L6201/C6213/C6214/C6212 = 3.3vĬ6216/C6217/C6218/L6201 =0v should be 3.3v traced back to audio chip (u6201) and no vref should be 4.5v but output =0v does it mean the audio chip u6201 is faulty and need replacing or u6200 that powers the chip if I feed 4.5v direct to c6213 to put 4.5v there will it damage anything ? The MacBook used to chime when powered on, but now does not.īut the sound still does not work from internal speaker or jack, if I connected Bluetooth headphones the sound works, if I plug a USB-Audio adapter the sound works. I have a MacBook Pro Mid 2015 A1398, I have the audio jack stuck in optical mode, I replaced the jack and now the stuck in optical mode is gone. Macbook Pro Retina 13″ (Late 2012 Early 2013) Hello i want to share with all members my collection
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