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The is a power supply and LED driver board primarily used in various Dell LED monitors . While a complete high-resolution schematic is rarely available as a single public document, technical teardowns and service logs provide a clear picture of its architecture and common failure points. Technical Overview
Section 1 (Input)
The Ilpi-354 V.a Schematic finds applications in various fields, including:
The primary side pins should register fluctuating resistance changes corresponding to load changes. A dead-shorted optocoupler freezes the PWM controller from stepping up under load. Ilpi-354 V.a Schematic
Based on field repairs, these are the most frequent issues seen on the ILPI-354 V.A:
Uses a precise TL431 shunt regulator paired with an optocoupler (e.g., PC817). The optocoupler translates voltage variations on the secondary side back to the primary PWM controller via infrared light, constantly adjusting the duty cycle to maintain stable output voltages. Technical Specifications Matrix Component Attribute Typical Value / Designation Supported Displays Dell E1916HV PCB Part Revision ILPI-354 V.A (491A011H1400H03 / 491A011H1400H06) Input Voltage Range 100V – 240V AC (50/60 Hz) universal mains Main Logic Voltage Rail Backlight Supply Rail +12.0V to +19.0V DC (model dependent) Backlight Controller Type Constant Current LED Driver Step-Up Boost topology Component-Level Troubleshooting & Failure Modes
Section 2 to 3 (Gate resistor)
Always discharge the primary capacitor to avoid electrical shock.
If you are troubleshooting without a full schematic, check these high-traffic failure points:
The Ilpi-354 V.a serves as the "heart" of the monitor’s power management system. Its layout is typical of modern switch-mode power supplies (SMPS) designed for displays: AC to DC Conversion The is a power supply and LED driver
If the board is scorched beyond repair, you can find replacements on sites like AliExpress or eBay by searching for the or the Dell-specific part number 790JW1400601R00 . Are you seeing specific component damage? Tell me: The part number of the burnt component (e.g., R801, D202). The symptoms (e.g., "no power" vs "no backlight").
The Ilpi-354 V.a Schematic is vital for several reasons:
This is the most reliable and straightforward solution for users without soldering skills. The entire ILPI-354 board is often available online from various marketplace and specialized Dell parts suppliers, with prices typically ranging from very low (around US $5) to a bit higher depending on the source. The procedure involves disassembling the monitor, unplugging a few connectors, and swapping the board. A dead-shorted optocoupler freezes the PWM controller from
The low-voltage ribbon cable bridging the ILPI-354 V.A power board to the video mainboard typically carries critical rails and signaling lines, which can be verified using a multimeter: : Powers the scalar/logic processor. GND Pin : System ground reference.
