
You'll be able to know the working process of the boot circuit
You'll know the troubleshooting process for no boot issues, large current issues, etc.
You'll know how the display circuit of iPhone 7 works
Learn how iPhone 7 backlight circuit works, with LCD backlight driving controlled by the CPU via I2C, two rails, inductors, and diagnostic steps for faults and repairs.
Examine how the iPhone 7 front camera functions as an image input, powered by pmu voltages and connected via a bus to the CPU, including initialization, standby, and image processing.
Explore the iPhone 7 rear camera circuit, including CPU control, PMU power rails, I2C data communication, image data processing, and diagnostic steps for fault isolation and maintenance.
explains how the iPhone 7 led flash circuit works, detailing two flash ics, enable signals from the main cpu, and temperature protection, with diagnostic steps for replacement.
Explore how the iPhone 7 USB circuit operates, controlled by the CPU and PMU, with power rails and accessory detection via the dock connector and lightning cable.
Learn how the iPhone 7 microphone circuit captures voice, performs active noise cancellation, and uses multiple mics and connectors, with basic diagnosis and repair steps.
Explore how the iPhone 7 earpiece and upper loudspeaker circuit processes call audio from digital to analog, enabling stereo playback and outlining key components and diagnosis steps.
Analyze the iPhone 7 bottom loudspeaker circuit, where the cpu controls the u3402 amplifier powered by the pmu’s 1.8-volt supply and boosted to 8 volts, with basic diagnosis steps.
Explains how the iPhone 7 Bluetooth circuit works, detailing the RF, CPU, PMU, and antenna interactions from power-up and wake-up to signal transmission, reception, and device pairing.
In this course, you'll learn the working principle and troubleshooting process of the below circuits
Boot Circuit
Display Circuit
Backlight Circuit
Touch Circuit
Front Camera Circuit
Rear Camera Circuit
LED Flash Circuit
Wi-Fi Circuit
Bluetooth Circuit
USB Circuit
Charging Circuit
Microphone Circuit
Speaker Circuit
Vibrator Circuit
NFC Circuit
SIM Circuit
Baseband Circuit
The learning process
First, for the chip level repair, we need to know the distribution of the components on the motherboard. It's just like a doctor should get familiar with the structure of the human body first, then the doctor can treat the disease.
Then we'll learn the function of each chip and how the relevant circuit works. For example, for the display circuit, we should know the screen is connect with the motherboard via the display connector. Then after checking the schematic, find out the display connector and track each pin-related rail, we'll have an overview of the related chips, so it will be easy to know where is the power comes from and how the signals are transmitted.
After we know the working principle, then it would be easy to do the troubleshooting. Just follow the principles of "from the outside to inside", "from the accessories to the chip", "check cosmetic first, then measure diode value, check voltage..."
Last but not the least, after finding out the faulty component, remove or replace the faulty component with a new one.
The learning purpose
The course is based on the schematic of the iPhone 7.
During the learning process, you'll need to follow the course and check the bitmap and schematic for hundred times.
When completing the whole course, you'll get familiar with the bitmap, schematic, and block diagram... which would be very helpful to form the repair logic and the ability to research and self-learning. So that in the future, you will be able to repair even the newly released models.