The power enters through a 2-pin AC connector. The schematic typically includes: Protects against massive overcurrent.
To shift the filter for the 2-meter amateur band (144-148 MHz), reduce all capacitors by 60% (e.g., 47pF → 18pF) and reduce coil turns by one turn each.
To minimize heat generation and maximize efficiency in a tight chassis, the secondary side drops traditional Schottky diodes in favor of a synchronous rectification circuit driven by a low
Dedicated smart-charge identification chips sit behind the USB ports. These chips communicate with connected smartphones or tablets over the Wlx-896b Schematic
Dedicated Qualcomm Quick Charge 3.0 (QC 3.0) path.
A full-wave bridge rectifier monolithic IC converts the clean AC wave into a pulsating DC voltage, smoothed by a high-voltage bulk electrolytic capacitor (typically 400V, 47µF–68µF). Stage 2: High-Frequency Switching & PWM Control
Integrated LED/LCD screen for independent real-time current and voltage monitoring per port. Circuit Overview and Internal Components The power enters through a 2-pin AC connector
Blown Main Fuse, Bad Bridge Rectifier, or Shorthanded Primary MOSFET
The circuit behavior of the WLX-896B operates under the following electrical parameters: Specification Circuit Significance AC 100V – 240V (50/60Hz)
| Specification | Details | | :--- | :--- | | Port Configuration | 6 USB Ports (4 standard, 2 QC3.0 ports, depending on variant) | | Total Output | 40W / 6A | | QC3.0 Output | 5V/3A, 9V/2A, 12V/1.5A | | Standard Port Output | 5V/2.4A Max | | Safety Features | SC Protection (Overcharging / Overheating) | | Input Voltage | 100-240V AC, 50/60Hz (Wide Range) | Related Models: WLX-896 (standard), WLX-896+ (digital display), WLX-896H (8-port PD wireless charger). To minimize heat generation and maximize efficiency in
Six parallel USB-A ports, each with dedicated current limiting or smart identification resistors (to allow fast charging on Apple/Android devices). 3. Common Troubleshooting and Repairs via Schematic
While 5 of the ports share a parallel 5V rail managed by smart identification chips, Port 6 handles QC 3.0 . A dedicated step-up/down buck regulator negotiates directly with the smartphone to change output dynamic profiles dynamically to 5V/3A, 9V/2A, or 12V/1.5A . 4. The LCD Ammeter and Voltmeter Logic
The journey of AC current begins with a fused input stage. The schematic would show a slow-blow fuse to prevent catastrophic failure, followed by an EMI filter—typically a common-mode choke (L1) with X-capacitors (C1, C2). This prevents the high-frequency switching noise from the charger from leaking back into your home's electrical grid.
Clean and inspect the trace lines near the USB ports. Check if a single port has shorted pins inside the physical plastic tongue. Safety and Upgrades Tip