If you need to repair yours:
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Working on SMPS circuits introduces severe electrical risks. Please observe the following shop rules when probing an open Wannien board: Wan Nien 101V0 Power Supply Schematic - Expert Q&A wannien 101v0 power supply schematic exclusive
. Check continuity across the input fuse with a digital multimeter. If open, check the primary MOSFET for an internal short before replacing the fuse. Output Voltage Fluctuations (Clicking or ticking noises)
The most common issue. Look for capacitors in the output stage that are swollen, leaking, or have high ESR (Equivalent Series Resistance). If you need to repair yours: Related search
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.
While "exclusive" schematics are rarely public, you can often find them by searching for the monitor model If open, check the primary MOSFET for an
Inside the Wannien 101V0: An Exclusive Look at the Power Supply Design Wannien 101V0 (often identified by model numbers like
The high-frequency pulses pass through the transformer. This step steps down the voltage while providing a safety barrier between the "hot" AC side and the "cold" DC output side. 4. Secondary Rectification & Filtering