1. Introduction
This manual provides essential instructions for the installation and proper handling of your YWLRONG AMOLED screen replacement for Xiaomi Mi 9T, Mi 9T Pro, Redmi K20, and K20 Pro devices. This product is designed to address issues such as cracked screens, unresponsive touch, dead pixels, black screens, or display abnormalities.
Image: The YWLRONG AMOLED screen replacement kit, including the screen assembly, a screen protector, and various repair tools.
2. Specifications
- Model Number: LCD For Xiaomi Redmi K20/K20 Pro/Mi 9T/Mi 9T Pro
- Type: AMOLED, 403 ppi
- Resolution: 1080 x 2340 Pixels
- Size: 6.39 inches
- Features: Supports Fingerprint, No Scratch, No Bad Pixels
- Package Dimensions: 7.95 x 6.97 x 0.94 inches
- Item Weight: 8.4 ounces
Image: Visual representation of the screen's basic information and specifications, including model number, type, resolution, and size.
3. Compatibility
This display screen is compatible with the following models:
- Xiaomi Mi 9T
- Xiaomi Mi 9T Pro
- Redmi K20
- Redmi K20 Pro
Please verify your phone model before purchase and installation. This screen is not compatible with models such as the Xiaomi Mi 9 or Mi 9 Lite.
Image: A visual guide demonstrating how to access 'About phone' settings to confirm the device model, highlighting compatible and incompatible models.
4. Setup and Pre-Installation Testing
4.1. Package Contents
The package includes the AMOLED display assembly, a screen protector, and a set of repair tools. While tools are provided, some phone models may require specialized tools not included in this kit.
Image: An overview of the items included in the package: the LCD screen, screen protector, professional screwdriver, tweezers, and disassembly tools.
4.2. Pre-Installation Testing
It is crucial to test the new screen before full installation to ensure it is fully functional. Do not remove any protective films or labels until testing is complete and satisfactory. Connect the new display's flex cable to your phone's motherboard and power on the device. Verify the following:
- Display Functionality: Check for dead pixels, color accuracy, and overall image quality.
- Touch Responsiveness: Test the entire screen for touch sensitivity and accuracy.
- Fingerprint Sensor: If applicable, test the in-display fingerprint sensor functionality.
Image: A diagram illustrating the four steps of quality control testing: frame test, LCD test, touch test, and a final comprehensive test.
If any issues are detected during testing, contact customer support immediately before proceeding with installation.
5. Installation Guidelines (Operating)
Screen replacement requires technical skill and precision. If you lack experience with phone repairs, it is highly recommended to seek professional assistance to avoid damage to your device or the new screen.
5.1. General Steps (Consult online guides for detailed model-specific instructions):
- Power Off: Ensure your device is completely powered off before starting.
- Remove SIM Tray: Eject the SIM card tray.
- Heat and Open Back Cover: Carefully heat the edges of the back cover to loosen adhesive, then use a suction cup and prying tools to open it.
- Disconnect Battery: Locate and disconnect the battery flex cable to prevent short circuits.
- Disconnect Old Screen: Disconnect the flex cables of the old screen from the motherboard.
- Remove Old Screen: Carefully remove the damaged screen assembly.
- Clean Frame: Clean any old adhesive residue from the phone frame.
- Connect New Screen: Connect the new screen's flex cables to the motherboard.
- Test Again: Perform a final test of the new screen before fully sealing the device.
- Apply Adhesive and Seal: Apply new adhesive to the frame and carefully attach the new screen. Reassemble the phone in reverse order.
Image: A new screen assembly being carefully handled in its protective packaging.
Image: A finger gently pressing down on a flex cable connector to secure the screen to the motherboard.
Image: A phone screen secured with clamps and rubber bands, indicating the method for holding the screen in place while adhesive cures.
6. Important Considerations (Maintenance/Care)
To ensure the longevity and proper function of your new screen, observe the following:
- Handle with Care: The screen is a delicate component. Avoid dropping the device or applying excessive pressure.
- Protect Corners: The corners of the screen are particularly vulnerable to impact. Consider using a protective case.
- Flex Cable Integrity: Ensure the flex cable connectors are not bent or damaged during installation.
- Avoid Pressure on IC Parts: Do not press or touch the integrated circuit (IC) parts on the flex cables, as this can cause damage.
Image: A visual guide emphasizing critical areas to handle with care during installation, including the four corners, connectors, and IC parts.
7. Troubleshooting
If you encounter issues after installation, consider the following common problems and solutions:
- Screen Not Turning On / Black Screen:
a. Ensure all flex cables are securely connected.
b. Check if the battery is properly connected and charged.
c. Try a hard reset of the device. - Touch Not Responding / Ghost Touches:
a. Disconnect and reconnect the touch flex cable.
b. Ensure there is no debris or damage to the connector.
c. Verify the screen is seated correctly without excessive pressure. - Dead Pixels / Display Anomalies:
a. Recheck flex cable connections.
b. If issues persist after re-seating cables, the screen may be faulty. Contact support. - Fingerprint Sensor Not Working:
a. Ensure the fingerprint sensor flex cable is correctly aligned and connected.
b. Some replacement screens may require recalibration or re-registration of fingerprints after installation.
If troubleshooting steps do not resolve the issue, please contact customer support for further assistance.
8. Warranty and Support
This product is covered by a return policy allowing for refunds or replacements within 30 days of purchase. If you encounter problems that cannot be resolved during installation (non-artificial damage), please contact us for support. We are committed to assisting you.
For assistance, please refer to the contact information provided with your purchase or visit the YWLRONG store on Amazon.
Image: An illustration detailing after-sales service, including a 30-day return period and customer support availability.
