From various technician forums, the board has been identified inside:
The heart of any SMPS is its PWM (Pulse Width Modulation) controller. Find the IC's part number on the board and search for its datasheet. The datasheet typically includes a reference application circuit, which is often very close to the actual board layout. For the Wannien 101V0, look for chips like the TSM101 or common eight‑pin PWM controllers like the UC3842 family. wannien 101v0 power supply schematic free
The name "Wannien 101V0" (also written as "WAN NIEN 101V0" or "Wannen Delta 101V0") is likely a manufacturer board code or a UL recognition marking (the "V0" often refers to a flame‑retardant rating). This board is a compact switched‑mode power supply that steps down mains AC voltage to a lower DC output—for example, 19V for a laptop or 8.5V for a PS2. From various technician forums, the board has been
If your Wannien 101V0 is malfunctioning, look for these common hardware failures before tweaking the circuitry: Output Voltage is Maxed Out (Unregulated) For the Wannien 101V0, look for chips like