Agzssl Front Screen Replacement Kit User Manual

1. Product Overview

This kit provides a high-quality replacement glass lens and touch digitizer for your Apple Watch Series 4 (40mm). It is designed to restore touch functionality and visual clarity if your outer glass is cracked or damaged, while the internal LCD screen remains functional. The kit includes all necessary tools and adhesives for a successful repair.

Image: The complete Agzssl Front Screen Replacement Kit, showing the replacement digitizer, tools, and UV lamp.

Image: A diagram clarifying that the product includes only the touch digitizer and front glass cover, not the LCD screen. This kit is for watches where the LCD display is still working.

2. What's Included

The Agzssl Front Screen Replacement Kit comes with the following components and tools:

• Touch Digitizer Replacement Screen (for Apple Watch Series 4 40mm)
• UV LOCA (Liquid Optical Clear Adhesive)
• B-7000 High-Performance Glue
• Portable UV LED Dryer Lamp (USB powered)
• Opening Tools (plastic pry tools)
• Screwdrivers (Y-shape and + shape)
• Tweezers
• Metallic Wire (for screen separation)
• Plastic Pick
• Rubber Bands (for securing during curing)
• Microfibre Cleaning Cloth

Image: A comprehensive view of all the tools and components provided in the kit, including various screwdrivers, pry tools, tweezers, adhesive, and the UV lamp.

3. Important Safety Information

Please read and understand all instructions before beginning the repair. This process requires precision and care. Proceed at your own risk.

• Heat Application: Do not heat the watch screen for too long, as this may cause damage to internal components. Follow recommended heating times.
• Fragile Components: The watch's internal connectors and the Force Touch ring are delicate. Handle them with extreme care to avoid damage during separation and reassembly.
• Glass Fragments: Be cautious when handling broken glass. Use tweezers to remove tiny fragments and protect your eyes.
• Adhesive Handling: Use adhesives (LOCA and B-7000) in a well-ventilated area. Avoid direct contact with skin and eyes.
• UV Lamp Safety: Do not direct the UV light towards your eyes.
• Professional Assistance: If you lack experience with small electronics repair, consider seeking professional assistance to avoid further damage to your device.

4. Installation Guide

The following steps detail the process for replacing the front screen and touch digitizer. It is highly recommended to watch the accompanying video tutorial for visual guidance.

Image: A visual summary of the easy installation steps, showing key actions like heating, separating, cleaning, and applying adhesive.

Step 1: Preparation and Power Off

Unload the watchband. Ensure the LED screen is functioning normally before proceeding. Then, turn off the power of the Apple Watch completely.

Step 2: Heating the Watch Screen

Using a hair dryer, heat the periphery of the watch for approximately 10-15 minutes. This step aims to soften the adhesive and separate the screen in a safe manner. Note: Do not heat for too long, as this could damage the screen or internal components.

Step 3: Cleaning and Initial Separation

Carefully use tweezers to clean any tiny glass fragments from the screen. Then, use a plastic pry plate and a suction cup (sucker) to gently separate the screen from the body of the Apple Watch. Be aware that there is a Digitizer Force Touch Sensor between the watch body and the screen. Exercise extreme caution to avoid any damage. There are also connecting lines between the watch body and the screen.

Step 4: Disconnecting Cables

Apply a drop of alcohol right on top of each connecting line's binder. The alcohol will dissolve the adhesive, allowing the tape to peel back more easily. Once the binder on all three connectors is stripped, take out the clip on top and then unlock the corresponding cable. Note: The latch is quite fragile and requires cautious operation. Alcohol is self-provided.

Step 5: Digitizer Separation

Use a hair dryer to heat the stripped screen for 5-7 minutes. Separate the digitizer connector from the LCD screen. Carefully twine the molybdenum alloy lines on the two circular columns, positioning the wire directly beneath the glass layer of the Apple Watch screen but above the Digitizer Force Touch Sensor. The molybdenum alloy lines should be used to cut between the outer glassy layer of the screen and the Digitizer Force Touch Sensor.

Step 6: Cleaning the Sensor

Using a clean and soft cloth, carefully remove any residual binder from the Digitizer Force Touch Sensor. After cleaning, test the digital converter for normal operation to ensure it is still functional.

Step 7: Applying LOCA and New Glass

Clean the surface of the Digitizer Force Touch Sensor from any dust and fingerprints. Drop the Liquid Optical Clear Adhesive (LOCA) from the yellow bottle onto the Digitizer Force Touch Sensor. This adhesive will bond the new glass screen firmly with the display. Carefully place the new glass screen onto the watch. Ensure that no bubbles exist beneath the glass. If bubbles appear during binding, gently press and push the bubbles towards the margin of the glass to remove them.

Image: Illustration of applying the LOCA adhesive to the watch screen, ensuring even distribution before placing the new glass.

Step 8: Curing the Adhesive

Illuminate the bottom of the screen with a lamp to ensure a good combination of the cover and the Digitizer Force Touch Sensor. Then, illuminate the entire screen with the provided portable UV LED dryer lamp for 3-5 minutes to harden the glue. After this process, the glass will be firmly bonded to the display.

Image: The portable UV LED dryer lamp in use, curing the adhesive on the watch screen to ensure a strong bond.

Step 9: Reconnecting and Testing

Carefully put back the three ribbons into their corresponding latches. Align the connector of the cables at the back of the screen with the slots on the mainboard. Lock the fragile connectors of the cables securely in place. After reassembly, test the watch to ensure normal operation and good touch sensitivity. In case of a display failure or abnormal touch sensitivity, double-check that the three ribbons are correctly put back in their corresponding latches and the cable connectors are properly aligned with the slots on the mainboard.

Step 10: Final Assembly and Sealing

Assemble the rest of the parts back to their original positions. Blue 3M tape is required to bind the screen and the watch body securely. UV glue is also available as an alternative for sealing. Ensure all connections are firm and the screen is flush with the watch body.

Image: A side-by-side comparison showing an Apple Watch with a severely cracked screen before repair and the same watch with a perfectly restored, clear screen after the replacement.

5. Maintenance

To ensure the longevity of your repaired Apple Watch screen:

• Avoid dropping the watch or subjecting it to strong impacts.
• Clean the screen regularly with a soft, lint-free cloth.
• Avoid exposing the watch to extreme temperatures.
• While the original watch may be water-resistant, performing a screen replacement can compromise its water resistance. Exercise caution around water after the repair.

6. Troubleshooting

If you encounter issues after installation, consider the following:

• No Display or Abnormal Touch: Ensure all three ribbon cables are securely connected and properly aligned with the mainboard slots. The latches must be fully closed.
• Bubbles Under Screen: If bubbles are present after curing, it may indicate insufficient pressure during application or incomplete curing. Try to gently push bubbles to the edge before the adhesive fully hardens.
• Adhesive Not Curing: Ensure the UV lamp is functioning correctly and was applied for the recommended duration (3-5 minutes) over the entire screen surface.
• Screen Not Fitting Flush: Check for any debris or excess adhesive around the edges of the watch frame or the new screen.

For further assistance, please refer to the seller's support channels.

7. Specifications

8. Warranty and Support

For information regarding product warranty, returns, or technical support, please contact Agzssl customer service directly through the retailer's platform where the product was purchased. Refer to your purchase documentation for specific contact details.