Faulty model]: iPhone 6 Plus
Fault】：Play sound display headphone mode
The customer description says that when playing sound, the display is headphone mode, no external playback.
Headset mode, that is, the system has been identified headset access, tail plug J1817’s headset insert detection signal HPHONE_TO_CODEC_DET_CONN abnormal, generally resulting in this phenomenon has tail plug audio IC will cause.
We first disassemble the machine, without buckling the tail plug, to see if it is still headphone mode, without buckling the tail plug, or the same headphone mode, it does not seem to be a tail plug problem.
Next, disassemble the machine, remove the motherboard, remove the U0900 audio IC and replace a new audio IC.
Installed test, external playback to restore normal, headphone mode lift, normal function, maintenance to the end of this. This fault is caused by audio IC damage is not inserted into the headset, playback external audio display headphone mode.