Built to Last:
Inside Hua Yi Teng's 18-Year Power Adapter Manufacturing Expertise

Shenzhen, China — July 28, 2026 — How many processes and inspections does a power adapter go through before it reaches your hands? As a professional power adapter manufacturer with 18 years of experience, ISO9001 certification, and a monthly production capacity of 900,000 units, Shenzhen Hua Yi Teng Technology Co., Ltd. embeds quality assurance into every stage of production.

Today, we invite you to walk through our production line — organized around the three questions B2B partners care about most: manufacturing capability, quality assurance, and global compliance.

I. Manufacturing Capability: Hybrid SMT+DIP Process for Full-Chain In-House Production

Hua Yi Teng maintains complete in-house production capabilities, utilizing a hybrid SMT and DIP process that integrates surface mounting, through-hole insertion, final assembly, and testing under one roof. This vertical integration ensures quality control at every step and faster response to customer requirements.

Hybrid SMT+DIP Process (Solder Paste Side & Insertion Side in Parallel)

The following 12 steps represent the complete PCB assembly flow — from raw PCB to a fully functional power supply board:

1. Solder Paste / Red Epoxy Printing — Applied with precision on fully automatic printers (selected based on process requirements).
2. Standard Component Auto-Insertion — Automatic inserters place standard through-hole components — electrolytic capacitors, resistors, Y-capacitors — precisely into PCB holes.
3. SMD Placement — Multiple high-precision pick-and-place machines mount chip capacitors, chip resistors, and other SMD components onto the PCB.
4. Reflow Soldering — PCBs pass through a reflow oven where solder paste melts (or red epoxy cures), securely bonding SMD components to the board.
5. Odd-Form Component Auto-Insertion — Specialized equipment handles automatic insertion of shaped components like spring plates and transformers.
6. Manual Insertion — Skilled technicians hand-insert irregular parts including heat sinks, AC input cables, USB female connectors, and common-mode chokes.
7. Wave Soldering — All inserted components are soldered simultaneously in a fully automatic wave soldering machine — at this stage, the PCB is fully tinned with solid solder joints.
8. Board Washing — Flux residues are thoroughly removed for a clean board surface.
9. Electrical Testing — The PCB now has full electrical functionality, enabling online parametric testing.
10. Manual Visual Inspection & Touch-Up Soldering — Skilled workers visually inspect every board and repair any soldering defects.
11. Glue Dispensing — Large components are secured with adhesive for enhanced vibration resistance.
12. De-Paneling — Finished PCBs are separated from panel rails.

Housing Processing

Multiple automated laser engraving machines precisely mark product models, electrical specifications, certifications, and customer logos on housings — ensuring clear, durable, and fully traceable identification.

II. Quality Assurance: Five Layers of Inspection for Every Single Unit

Quality is the top priority for B2B customers. Hua Yi Teng has established a five-tier quality assurance system covering the entire production flow:

1. Tier 1 – Post-Reflow Visual Inspection
   After reflow soldering, every PCB is visually inspected by dedicated quality personnel to detect missing components, skewed parts, or other placement defects.
2. Tier 2 – Post-DIP Visual Inspection & Touch-Up
   Following wave soldering, board washing, and electrical testing, skilled workers visually inspect every PCB for soldering defects and perform immediate repairs.
3. Tier 3 – Four Electrical Safety Tests (post-assembly)
   Each assembled unit must pass pre-test, electrical test, hi-pot (insulation withstand) test, and a final electrical test — four checkpoints verifying voltage, current, and insulation integrity.
4. Tier 4 – 2-Hour Burn-in / Aging Test
   Every unit undergoes a full 2-hour aging test under high-temperature, full-load conditions to eliminate potential early-life failures. This is a non-negotiable step in our process.
5. Tier 5 – Final Visual Inspection & OQC Outgoing Sampling
   Quality inspectors examine every unit for scratches, gaps, and correct labeling. After packaging, OQC conducts random sampling on packed goods — shipment is released only upon OQC approval.

III. Global Certifications: 20+ Approvals for Seamless Market Access

For B2B customers expanding globally, certifications are critical. Hua Yi Teng products carry CE, ETL, FCC, GS, CB, UKCA, RCM, SAA, KC, PSE, ICES, DOE, CEC, EPR, NrCan — over 20 international approvals covering North America, Europe, Asia, and Australia — enabling smooth customs clearance and rapid market entry.

With these certifications already in place, you can bypass the time-consuming and costly process of obtaining individual market approvals. Simply provide your specifications, and we deliver products ready for your target markets.

IV. Flexible Customization: Comprehensive OEM/ODM Support

From voltage, current, housing, cables, and connectors to plug types, labeling, and packaging — Hua Yi Teng offers full OEM/ODM customization tailored to your brand requirements. We respond flexibly to orders of any volume.

Appendix: Hua Yi Teng Power Adapter Production Flow