Chosen Solution
Hi, My iPhone 6S don’t load energy so i replaced the battery, charge jack and finally Tristar IC (two times). I plugged the charge cable and with the multimeter measured the voltage which was between 0 and 1.5 Volts. Someone can tell my what I did wrong or what could I do to get a higher voltage between 4.8 and 5 Volts? I read some threads of this kind of subjects and they advise me to find the “pins” voltage and measure them (I know that in iPhone 6, are the C1704 and Q1701). What “pins” needed to be measure on iPhone 6S (If possible some schematics of this pins, would be appreciated). Thanks in advance.
For any charging problems, the problem usually lies with either the battery, the Lightning Port flex or the logic board. Assuming you are confident that the battery and flex are known-good, let’s focus on the logic board. The charging circuit is based on the Tristar IC recognizing that a charger is connected, the TIGRIS IC that supplies the actual juice and the PMIC that regulates the whole thing. You may have incorrectly installed the TRISTAR so you should check your work. You don’t say how much experience you have in micro-soldering so I don’t want to jump to any conclusions. One way to test the TRISTAR is to measure the voltage at the battery connector (without a battery) while the phone is connected to a charger. If you see anything less than 2V, then TRISTAR needs replacement.
