iPhone7~12PROXMAX RF problem course-All troubleshooting with signal problems
1. Explanation of the principle of the baseband circuit.
-Diagnosis of baseband circuit
– Diagnosis of PMU baseband without turning on the phone.
-Diagnosis of EEPROM baseband
-How to repair the EEPROM baseband data
-Common baseband circuit faults
Explanation of the principle of SIM card circuit
-Correct method of SIM circuit measurement
-How to measure the SIM circuit voltage
-Measurement of the SIM card circuit and voltage demonstration
Explanation of the RF circuit principle
-RF circuit measurements
-RF power supply measurement
-Signal diagnostics by making false antennas
-Common RF circuit failures
-Repair of no imei when dialing *#06#
-Repair of no imei when dialing *#06# -Repair of faults like *#06#
-Repair failures as with 2G signal but no 4G signal
-Fault repair as with 4G signal but no 2G signal
4. iPhoneX ~ 12 Measurement of working condition of components in RF circuits.
5.Modification of Baseband EEPROM programmer to make it universal.
6. Diagnosis of baseband failures by ITUNES
7.Diagnostic with panic full of baseband related circuits.
8.Circuit change to repair baseband failures (IP7/7P).
9. Live repair of 2 defective iPhones by radio frequency.
Repair process measurement methods and repair ideas”.