Wlx-896b Schematic -

[AC Input 100-240V] ──> [1. Primary / EMI Stage] ──> [2. Switching Stage (PWM/MOSFET)] │ [4. Digital MCU Display] <── [3. Secondary Stage (5V DC Reg)] <┘ Stage 1: Primary Input & EMI Filtering

: The display and port monitoring are often managed by a dedicated microcontroller (MCU) that interfaces with current-sensing resistors for each USB channel. Wlx-896b Schematic

These convert the low-voltage AC from the transformer into pulsating DC. [AC Input 100-240V] ──> [1

Always unplug the unit from AC mains before attaching test leads or soldering components. Wlx-896b Schematic

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