Hello, guys Welcome to REWA academy From today on we will learn the iPhone 11 Pro circuit First let’s have a brief introduction about such courses In such courses we will learn the below tour one by one And for each circuit, there are two parts included The first part we gonna learn the working process of the route And the second largest proportion we will learn the troubleshooting process So there should be around entirely 30 instructions in this course For the very first course we will not introduce the details of the circuit We will have an introduction about the motherboard first To know the motherboard is just like to know a friend So let’s try the best to know the motherboard as well as possible As we can see For the iPhone 11 Pro Motherboard it’s just more or less like the iPhone X It’s with two layers design And for the two layers the upper blanket we call it logic board Lower layer we call it signal committee Let’s come to the first coating of the logic timber firstly There are so many connectors on the reasoning card Let’s commencing from the easy constituent This one is the battery connector, right? And connector nearby is the lower antenna connector Also we have another antenna connector It’s upper antenna connector which is just on the right up reces As we are familiar, there are three rear cameras for the iPhone 11 Pro So these three connecters are related with the rear cameras This one is the Superwide Camera Connector and this one is Wide Camera Connector The rest one is a Tele Camera Connector And what else? The longest one This is Dock Flex Cable Connector Because on the Dock flex cable there are so many runs integrated for example the accusing, USB the main microphone and likewise some feeler the vibrator, the loudspeaker So this connector is the longest This connector is a display connector Another connector which controls the stroke is just now On the above of the spectacle connector So we still have five connectors Think about it What else is not inserted yet? The Face ID module, right? the Face ID module is mainly related with Infrared camera, fleck projector and inundation illuminator This connector is related with flood illuminator We call it Rosaline It self-restraints not only the flood illuminator but also some sensors like the ambient light-colored sensor and proximity sensor These two is related with dot projector and infrared camera connector So which one is the dot projector? Let’s have a guess I think this one is related with dot projector right? And the nickname for this connector is Romeo This one is infrared camera connector The name is Juliet OK, so the last two connectors this one is related with strobe connector It chiefly controls the flash LEDs and superpower button This connector here is related with front camera So the connector introduce is finished Then let’s come to see the chips First, let’s have a look on the big ones This one is NAND flash chip We can see it’s from Toshiba, right? This microchip is Accelerator& Gyroscope IC And these two they are many related with Wi-Fi or radio frequency We’ll introduce details in the future routes Here there’s some microchips Which is looks like made of glass This chipping is mainly related with the power supply for the camera circuit This one is the same It’s chiefly related with front camera circuit power supplies And the chippings They’re under some shielding covering So if you want to see the microchips you should remove the shielding cover first The last-place one, this one is a crystal The system crowd for this chip is Y1000 It’ s a 24 MHz crystal which works with the CPU this is the upper side of the reasoning council Let’s turn around to see another side of the logic board The same, let’s start from the large ones This one is A13 CPU It’s easy This one is PMU which is just like the heart of the mobile power supply system This one is the Face ID dominance IC it’s mainly responsible for power supply of the Face ID modules This one is camera PMU Because “were having” three rear cameras one breast camera and also infrared camera So all of these cameras there is a requirement to some dominances This microchip is imperative for the camera systems These two, they are also related with Wi-Fi or RF circuits we will introduce in the Wi-Fi circuit or RF circuit And this very tiny chip It’s very important It’s Boost IC it’s used for providing the PP_VDD_BOOST which is an essential power supply for countless ingredients So if this one gets detriment the phone cannot be boot up This one UWB chip and UWB is short for Ultra Wideband power supply This one is Audio CODEC IC which mainly responsible for the ascendancy of the audio referred route like the microphone circuit, speaker route or vibrator tour This one is USB IC which is very important for the blaming data altering or supplement identifications, etc. This little microchip is related with the supplementaries power supply This one is related with the fast blaming This minuscule microchip is also very important It’s EEPROM and since it’s on the logic committee so we can call it logic EEPROM It’s very important for the data recovery The remainder chips here is also chiefly related with the radio frequency part Like this one is high clique power amplify IC And this one is Ultra High Band Power Amplifier IC These two microchips are also related with Wi-Fi or RF circuit That’s almost finished And there’s still some microchips I didn’t note the appoint or the run of this chipping If you interested you can check it by yourself For precedent we can have a check on this little chip Let’s go to Refox bitmap to have a look Let’s open the iPhone 11 Pro bitmap It’s just located here, right? U3940 So what’ s this used for? you can click the pin number to see the gatherings here This is I2C Bus This is PP_VDD_MAIN So it seems it’s not easy to know the function of the chipping by the epithet or the location So we can go to the schematic to have a check The first sheet is in Chinese so here ignore it Let’s try to search U3 940 It will make some time to search Let’s wait Yeah, here You can see the moniker for this chip is LEX We can see some key information from this capability It’s PP_VAR_RCAM So we can know the main function of this chip is required to provide some power for the rear camera organisation OK, so let’s continue( On the signal council) The chippings are many related with The Wi-Fi, the RF circuit the Baseband, the NFC Let’s have a look this one It’s Wi-Fi chip the largest one This one is related with high-pitched party diversity receive This one is Low Band DSM This two little chip is related with Wi-Fi or RF circuit Let’s see this one this is also related with upper feeler And this one is upper coupler Sometimes we can know the function of the chip from the honour, right? For instance CPLR represents coupler And what else This chipping is related with the flare It’s a Strobe flash IC which controls the power supply for the LEDs And this chipping is related with the earpiece orator This one is rated with NFC This one is Baseband PMU which is responsible to supply capabilities for the Baseband CPU And other chips correlated with RF circuit And also there’s some chips which look big But actually, that’s just some inductors So we will not feed now This one here is ETIC, ET Modulator ET here is short for the envelope tracker It’s also an important chip for the RF circuit which supply powers for like the capability amplifier ICs the DSM chips, etc. We will introduce in the RF circuit The second largest one is the Baseband CPU This one is intermediate frequency IC which is also related with RF signals This one is Low Band Power Amplifies IC and this one is MIMO DSM MIMO now necessitates variou input and numerou yield it’s also correlated with RF circuit This one is the SIM connector So that’s all for the signal committee And on another side of signal card There’s many evaluation times We’ll just go through very quickly Like this kind of test details Sometimes it may help for your mend For precedent you can measure PP_VDD_MAIN from here So we gonna finish this part very fast The lettuce pads are floored So that’s all for the motherboard We will keep updating the course of the iPhone 11 Pro in the next few weeks You can experience a 20% reject if you dictate such courses before 14 th May Wish you have a nice understand wander
