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iPhone display circuit repairing

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This video mainly explains the commonly used terms of display circuits

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LCM refers to the display screen,

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DISPLAY and DISP refer to the display screen

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In iPhone 8 and above models, the display is identified by DISPLAY

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For example, in the circuit diagram of the iPhone 8P Qualcomm version,

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it is shown on the connection seat

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We can see that there are many pins marked DISPLAY,

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DISPLAY refers to the display screen

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In the iPhone 12 Pro Max schematic diagram,

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DISPLAY is also used on the display seat to represent the display screen

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For example PP4V6_DISPLAY, GPIO_DISPLAY

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As long as DISPLAY is marked,

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it means a signal related to the display

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The display screen of models before iPhone 8 uses LCM to identify

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For example, in the circuit diagram of iPhone 6sp,

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it shows that there will be a lot of signal marks on the connection socket

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LCM refers to the display

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Look at the iPhone 7P circuit diagram

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There are many pins marked LCM on the display connector

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These logos of LCM are all signals related to the display circuit

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MIPI refers to the display image transmission data bus

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iPhone 6 to iPhone 14 models use the MIPI bus to transmit display data

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RESET, reset signal

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PWR_EN, power on signal

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BOOST means boost

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PP5V7 refers to the positive 5.7V power supply,

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PN5V7 refers to the negative 5.7V power supply

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BSYNC refers to the synchronization signal

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PANICB, display anomaly detection signal

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AMUX is the analog select signal

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Now, we will review the terms we have learned

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by showing the connection socket in the iPhone 11 schematic diagram

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For example, PN5V7_DISPLAY refers to the negative 5.7V power supply of the display

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MIPI DISPLAY, these signal lines represent the data transmission bus of the display

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PP1V8_DISPLAY refers to the 1.8V power supply of the display

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PP5V7_DISPLAY refers to the positive 5.7V power supply of the display

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DISPLAY_PANICB refers to the anomaly detection signal from the power supply to the display

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TEST means test signal

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The 8th pin refers to the display screen test signal

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Pin 12, DISPLAY RESET refers to the reset signal of the display

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Pin 14, DISPLAY_PWR_EN refers to the power on signal of the display

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Pins 16-26 are all marked DISPLAY,

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but there will be a mark BL on the back,

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which actually refers to the backlight

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Pins 16-26 all refer to the backlight signals of the display

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These English words are required for maintenance and display circuit diagrams

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If we do not understand the meanings of words,

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it will be difficult to understand when listening to the principle,

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and the signals will not be found when looking up in the circuit diagram

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Ok, that's it for this lesson