The "V.a" in the title usually indicates a specific revision regarding the output connector pinout and the presence of an auxiliary standby supply.
Schematic Reference: Section 4 (Output rectifiers) Ilpi-354 V.a Schematic
At the left side of the Ilpi-354 V.a schematic, you will find: The "V
Common Failure: A shorted bridge rectifier or a dried-out bulk capacitor often causes "no power" or humming. Check these first against the schematic's designated values. Common Failure: A shorted bridge rectifier or a
The leftmost edge of the schematic begins with input terminals (typically labeled VIN+ and VIN- or L and N).
Schematic Reference: Section 2 to 3 (Gate resistor)
Based on field repairs, these are the most frequent issues seen on the ILPI-354 V.A: