The heart of the module is an offline Primary-Side Sensor Controller chip, often designated as the (or a comparable alternative like the TOP254YN in some board variations).
The input side carries lethal mains voltage. Never touch the board while it is plugged in. wx-dc12003 schematic
The is a compact, isolated AC-DC switching power supply module commonly used in DIY electronics to convert high-voltage mains power into safe, low-voltage DC. Core Technical Specifications The heart of the module is an offline
The is typically an AC-to-DC switching power supply board. Its primary function is to convert high voltage AC mains (110V–240V, 50/60Hz) into one or more low-voltage DC outputs. Based on physical samples and repair logs, this board most often provides: The is a compact, isolated AC-DC switching power
Before dissecting the individual stages of the schematic, it is helpful to look at the baseline operating parameters. These values dictate the selection criteria for the components found in the circuit:
| Pin | Signal | Voltage | Color (typical) | |-----|--------|---------|-----------------| | 1 | GND | 0V | Black | | 2 | GND | 0V | Black | | 3 | +12V | +12V DC | Yellow | | 4 | +12V | +12V DC | Yellow | | 5 | +5VSB | +5V Standby | Red | | 6 | PS-ON | 3.3-5V | Green (optional) |