Ilpi-354 V.a Schematic
The board provides voltage regulation for both the main logic and the LED backlight driver. Dell E1916HV Go to product viewer dialog for this item. Part Numbers (P/N): Often listed as 790JX1400603R00 , 790JM1400601R00 , or 491A011H1400H06 . Alternative Versions: Related designs include the , which is also used in some Go to product viewer dialog for this item. Common Issues and Repair Tips
A documented real-world repair case for the ILPI-354 revealed a hidden problem:
The is a widely used combination power supply and LED driver board found in popular budget-friendly Dell monitors . Understanding the schematic of this hardware component is vital for micro-soldering technicians and DIY repair enthusiasts troubleshooting common monitor power failures. Hardware Overview and System Role Ilpi-354 V.a Schematic
[ AC Mains Input ] ---> [ EMI Filter & Protection ] ---> [ Bridge Rectifier ] ---> [ Bulk Capacitor (450V) ] | [ Secondary Output Rails ] <-- [ Schottky Diodes ] <-- [ Isolation Transformer ] <-- [ PWM Controller / MOSFET ] | | +--> [ Logic Board Power ] +--> [ Feedback Optocoupler ] +--> [ LED Backlight Driver ] 1. Primary (Hot) Side Circuitry
To maintain stable voltage, the schematic shows a circuit looping from the output back to the PWM controller. This path includes: The board provides voltage regulation for both the
: The transformer steps down the high-frequency AC, which is then rectified and filtered down to stable DC rails—most notably a 5V DC rail to power the logic board and a 12V to 17.5V rail to feed the backlight inverter section.
When a monitor fails to turn on or loses its backlight, the Ilpi-354 V.a is usually the culprit. Technicians use the schematic to verify voltages at specific test points: Alternative Versions: Related designs include the , which
Sites like MoreTVParts often stock units pulled from monitors with broken screens. Dell SE2216H Power Supply Board ILPI-354 (P/N - eBay
For many, the easiest path is a direct board replacement. Here is a breakdown of the two primary repair options.
The ILPI-354 power supply board is the central hub for managing all electrical needs within its host monitors. Its primary function is to convert the standard AC mains voltage from your wall outlet into the stable DC voltages required by the monitor's internal systems.
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