Amaoe Samsung S21 Ultra SM-G998U Layer Reballing Stencil Set Template Positioning plant tin net Steel mesh

Original price was: ₹3,500.Current price is: ₹2,699.

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Original price was: ₹3,500.Current price is: ₹2,699.

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  • User Guide

    User Guide

    Please read the manual before use.

    1. Introduction & Workspace Setup

    This section sets the foundation for a safe repair environment. Before a single tool touches a phone, the workspace must be prepared to protect both the technician and the sensitive electronics.

    • Electrostatic Discharge (ESD) Safety: Instructions on grounding yourself using an ESD wrist strap and working on an anti-static mat to prevent frying microchips with static electricity.

    • Safety Gear: Protocols for wearing safety glasses (critical when prying shattered glass) and working in a well-ventilated area (crucial for adhesive fumes and soldering smoke).

    • Lighting and Magnification: Recommendations for high-intensity desk lamps and digital microscopes or magnifying visors for viewing microscopic components.

    2. Disassembly & Opening Tools

    The most physically risky part of mobile repair is opening the device without cracking the glass screen or ripping delicate internal ribbon cables.

    • Thermal Tools (Heat Guns & Heat Pads): Instructions on setting precise temperatures (typically 80°C to 100°C) to soften heavy factory adhesives without damaging the display.

    • Suction & Leverage Tools: Proper placement of heavy-duty suction cups and screen prying fixtures to safely create an initial gap.

    • Separation Media (Plastic Picks & Spudgers): Techniques for slicing through glue lines using plastic opening picks without inserting them too deeply into the frame.

    3. Fastener & Component Manipulation

    Modern smartphones use dozens of tiny, highly specialized screws and brackets to hold internal shields in place.

    • Precision Driver Identification: A breakdown of specialized micro-bits, detailing exactly when to use Pentalobe (iPhones), Tri-point/Y-type (internal Apple shields), Torx/Torx Security (Android devices), and standard Micro-Phillips.

    • Organization Systems: Guidelines for using magnetic project mats or screw organizing trays to map out screw locations, preventing the catastrophic error of “long-screw damage.”

    • Gripping & Placer Tools: How to utilize straight and curved ESD-safe tweezers to safely disconnect fragile ZIF (Zero Insertion Force) and coaxial cable connectors.

    4. Diagnostics & Testing Equipment

    This section transitions the user from basic mechanical teardowns to logical troubleshooting when a phone won’t turn on or charge.

    • Digital Multimeter (DMM): Step-by-step instructions on setting up the meter for DC voltage testing (checking battery and charging port output) and continuity/diode mode (hunting for short circuits).

    • DC Power Supply: How to boot a phone motherboard without a battery attached, interpreting current draw (Amperage) to diagnose power management failures.

    • USB Ammeter / Tester: Utilizing an inline USB safety tester plugged into the charging block to instantly diagnose if a phone is pulling normal current ($1A$ to $2A$) or completely dead ($0A$).

    5. Micro-Soldering & Component Level Repair

    For advanced users handling board-level fixes like swapping out charging ports, audio IC chips, or FPC connectors.

    • Soldering Iron Stations: Temperature calibration tips, tip selection (chisel vs. conical), and maintenance/tinning procedures.

    • Hot Air Rework Stations: Managing the delicate balance of air flow and temperature to safely desolder multi-pin components without blowing adjacent surface-mount resistors off the board.

    • Chemical Consumables: Proper application of rosin flux (to clean joints and fluidize solder), solder wick (braided wire to remove old solder), and low-melt solder alloys.

    6. Adhesives, Cleaning & Reassembly

    The final step is cleaning up the internal cavity and sealing the device back up to its original structural integrity.

    • Chemical Cleaners: Safe usage of 99% Isopropyl Alcohol (IPA) to dissolve old glue residues, flux oils, and clean mild liquid damage.

    • Liquid Adhesives vs. Tape: Instructions on applying specialized acrylic glues (like B-7000) versus applying precision-cut double-sided adhesive gaskets.

    • Camping and Curing: Utilizing specialized display repair clamps to apply even, steady pressure while the new adhesives cure over 15 to 30 minutes.

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Amaoe Samsung S21 Ultra SM-G998U Layer Reballing Stencil Set Template Positioning plant tin net Steel mesh

Enhance Precision with Superior Craftsmanship

The Amaoe Samsung S21 Ultra SM-G998U Layer Reballing Stencil Set Template Positioning plant tin net Steel mesh is expertly designed for hassle-free and accurate reballing tasks. With its high-quality steel mesh and precise positioning, this tool ensures exceptional performance for repairing and reballing your Samsung S21 Ultra SM-G998U.

Durable Design for Long-Term Use

Boasting robust construction, the stencil set’s steel mesh is both durable and resistant to deformation, making it the perfect choice for professional use. The plant tin net enhances accuracy, allowing for smooth operations and efficient results every time. Amaoe Samsung S21 Ultra SM-G998U Layer Reballing Stencil Set Template Positioning plant tin net Steel mesh

Perfect Fit for Samsung S21 Ultra SM-G998U

Custom-made to match the intricate design of the Samsung S21 Ultra SM-G998U, this template ensures perfect alignment while minimizing errors. Whether you’re a repair specialist or a DIY enthusiast, this stencil set simplifies advanced repair tasks with confidence and ease. Amaoe Samsung S21 Ultra SM-G998U Layer Reballing Stencil Set Template Positioning plant tin net Steel mesh

The Amaoe Samsung S21 Ultra SM-G998U Layer Reballing Stencil Set Template Positioning plant tin net Steel mesh is a professional-grade precision tool designed for senior repair technicians. When dealing with the Snapdragon 888 variant of the S21 Ultra, the “sandwich” motherboard design requires absolute accuracy to ensure the middle layer logic board makes perfect contact after a repair.

Below is the comprehensive technical specification and breakdown for this specific stencil set.


Technical Specifications Table

Feature Category Detailed Specification
Model Name Amaoe Samsung S21 Ultra (SM-G998U) Middle Layer Stencil
Compatibility Samsung Galaxy S21 Ultra (US/North American Variant)
Model Code Support SM-G998U, SM-G998U1, SM-G998W
Chipset Focus Qualcomm Snapdragon 888 (SM8350) Logic Board
Material Composition High-Grade Japanese Imported 304 Stainless Steel
Manufacturing Process High-Precision Laser Cutting / CNC Etching
Stencil Thickness 0.12mm to 0.15mm (Optimized for middle frame height)
Hole Shape Square Holes with Rounded Corners (Prevents tin sticking)
Heat Resistance Up to 450°C without significant warping
Alignment Tech Built-in Positioning Grooves / Plant Tin Net Design
Surface Finish Matte Anti-glare coating with Laser Engraved Markings
Package Contents Upper/Lower Positioning Plate, Steel Mesh, Magnetic Base (Optional)

Core Features and Functional Design

1. 3D Positioning and Plant Tin Net

Unlike standard flat stencils, the Amaoe Samsung S21 Ultra SM-G998U Layer Reballing Stencil Set Template Positioning plant tin net Steel mesh utilizes a layered positioning system. The “plant tin net” refers to the specific mesh layout that aligns perfectly with the BGA (Ball Grid Array) pads of the S21 Ultra’s middle frame. The template features recessed grooves that “lock” the motherboard into place, preventing any lateral movement during the application of solder paste.

2. Specialized Steel Mesh Material

The use of 304 stainless steel ensures that the mesh remains rigid under high heat. During the reballing process, technicians apply heat to melt the solder paste into spheres. Cheap stencils often “bow” or expand, causing solder bridges. This Amaoe Samsung S21 Ultra SM-G998U Layer Reballing Stencil Set Template Positioning plant tin net Steel meshtemplate is engineered with thermal expansion gaps to maintain flatness at melting temperatures ($183^\circ\text{C}$ for leaded or $217^\circ\text{C}$ for lead-free paste).

3. Precision Square Holes

The stencil holes are laser-cut with a slight taper. The top of the hole is marginally wider than the bottom. This geometry allows the solder balls to release effortlessly from the mesh once they have solidified, reducing the risk of “torn pads” or missing solder balls when the stencil is lifted.


Application Workflow for SM-G998U

To achieve a professional-grade repair on the S21 Ultra motherboard, the following workflow is optimized for this stencil:

  • Cleaning: Use specialized PCB cleaner and a fiber brush to remove all old solder and flux from the middle layer interposer.

  • Positioning: Place the SM-G998U logic board into the Amaoe positioning base. The board should sit flush within the cutouts.

  • Paste Application: Apply a high-quality solder paste (e.g., $183^\circ\text{C}$ Medium Temperature) across the steel mesh. Use a scraper at a 45-degree angle to ensure even filling of the square holes.

  • Heating: Using a hot air station set to approximately $330^\circ\text{C}$ with low airflow, heat the stencil in a circular motion. The plant tin net design ensures even heat distribution to prevent localized warping.

  • Cooling & Release: Allow the board to cool for 10 seconds before lifting the stencil vertically.


Maintenance and Durability

Action Recommendation
Cleaning Clean with 99% Isopropyl Alcohol (IPA) after every use.
Storage Store flat in a moisture-free environment to prevent oxidation.
Debris Removal Use an ultrasonic cleaner if solder paste hardens inside the micro-holes.
Handling Avoid using sharp metal tweezers on the mesh to prevent scratching the surface.

Why SM-G998U Specificity Matters

The US variant (SM-G998U) utilizes the Qualcomm architecture, which has a distinct pinout and middle-layer footprint compared to the Exynos (International) versions. Using a generic S21 Ultra stencil often leads to alignment failures. This Amaoe set is specifically mapped to the SM8350 platform’s RF and Power management traces, ensuring that every ground and data pin is perfectly reballed for a 100% success rate in “sandwich” board reassembly.

Amaoe Samsung S21 Ultra SM-G998U Layer Reballing Stencil Set Template Positioning plant tin net Steel mesh

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Weight 1 kg

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