When testing under power, use an isolation transformer and a dim-bulb tester to prevent further damage.
Your first clue is that the "WAN NIEN 101V0" is a Printed Circuit Board (PCB) identifier, not a unique power supply model number. This small but critical distinction explains why the schematic is so hard to find. The board can be found in a surprising variety of devices:
Disclaimer: This report is based on technical analysis of similar SMPS modules and standard industry practices for "Wannien" branded electronics. High voltage is present inside power supplies; exercise extreme caution if probing live circuits. wannien 101v0 power supply schematic exclusive
In one repair log for a Delta 101v0 (likely the same or a very similar board), the technician found that the diodes at D2 and D3 , a pair of PK MUR 460 ultrafast rectifiers, were completely shorted, measuring roughly 1 ohm of resistance across them.
The initial AC input stage utilizes a bridge rectifier and bulk capacitors (often rated for high voltage, such as 450V) to convert AC to a raw DC bus. Pulse Width Modulation (PWM) Control: When testing under power, use an isolation transformer
Failed high-frequency Schottky output diodes or dried secondary filter capacitors.
When the input fuse (often marked ) is blown, it is usually caused by a shorted bridge rectifier or a failed switching transistor. In one ASUS adapter repair, the T3.15A 5 A fuse, a 0.33 µF X2 polyester capacitor, and the bridge rectifier were all damaged and had to be replaced. The board can be found in a surprising
The Wannien 101v0 Power Supply Schematic reveals a relatively straightforward but robust design optimized for low-voltage industrial components. The board is designed to take a primary DC input—typically in the 12V-15V range—and convert it into stable output voltages required by logic boards, controllers, or display panels. Key Circuit Sections:
Repair technicians have encountered several recurring faults on the Wannien 101V0. The lack of a schematic makes each of these failures more difficult to diagnose, but the community has collectively built a body of knowledge.