DIY slove iPhone 6S Audio and Vibration

We will discussion one issue concerning IPhone 6S today concerning the sound and vibration of the device. and vibration does not work whenever the phone gets hot. This can become annoying ,  Let’s take a look at the particulars of this issue and how to resolve it.

The receiver signal CODEC_TO_RCVR_N CODEC_TO_RCVR_P of the normal call mode comes out from the iPhone 6s audio IC, passes the FL3153 FL3154 to the receiver flex cable interface J3100, and then sends signal to the receiver to make a sound. There are two microphones in the normal call mode, one is LOWER MICI, the other one is LOWER MIC4. And there are two microphone signals, one is LOWERMICI_TO_CODEC_A1N1_P LOWERMICI_TO_CODEC_A1N1_N, and the other is LOWERMIC4_TO_CODEC_A1N2_P LOWERMIC4_TO_CODEC_A1N2_N.

Open WUXINJI dongle, we know that the two sets of microphone signals pass the charger port flex cable, charger port flex cable interface J4600, and then respectively through inductance FL4610 FL4611 and FL3613 FL4614 to Audio IC--U3500. The microscope power sent by audio respectively pass inductance FL4612 FL4615 and then through the charger port flex cable to supply the two microphones.

When the iPhone 6s Loudspeaker signal (ringtone signal) in the HF mode:

SPEAKER_TO_SPEAKERAMP_VSENSE_P, SPEAKER_TO_SPEAKERAMP_VSENSE_N comes from ringtone amplifier IC--U3700, and passes the FL4630 FL4631, charger port felx cable to loudspeaker to make sound.

The hands-free microphone signal (the hands-free model microphone is on top of receiver flex cable) passes through the receiver flex cable interface J3100, passes through the inductor FL3155 FL3156 to the audio U3500, and the audio U3500 sent the audio U3500, the HF microphone power PP_CODEC_TO_FRONTMIC3_BIAS through the inductance FL3150 to the receiver's flex cable interface J3100, and then supplies to microphone through headphone flex cable.

In addition, iPhone 6S / 6S plus also designed a videotape microphone, which is on top of the power on flex cabble, which can cause silent video or hear only murmur.

The ringtone amplifier IC--U3700 damage. Besides the ringtone, it will cause no hearing, no vibration. The vibrator is controlled by U3700 and U3800. If there is no vibration failure, besides vibration and charger port flex cable, most of them are damaged by U3700 or U3800. Use PPD 861D+ Hot Air Station to remove the damaged part and replace new one will solve the problem.

The steps to repair the sound fault:

If there is no sound completely, replace the audio U3500,
If part of the sound is not working, then check if the related inductance are dropped out, short connect by jumper wire.

U3700 and U3800 damage will cause no ringtone and no vibration. It will also cause the failure of the receiver to be silent.

For more info , follow the link:vipprogrammer.com

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