The is a critical power supply board primarily utilized in various Dell LCD monitor series , including the E1916HV, E2216HV, and SE2218HV. This board is responsible for converting AC input into regulated DC voltages needed to power both the logic board and the LCD backlight. Technical Overview & Specifications ILPI-354 V.A
Could you describe the your monitor is showing (e.g., completely dead, blinking light, or screen flashes then goes dark)? I can give you the specific component numbers to test next. Share public link
Always use an isolation transformer and safety glasses when probing a live, hot-side circuit.
Manufacturers rarely release these schematics publicly. Repairers usually rely on high-resolution photos of the board or partial diagrams shared on community sites like Badcaps.net or Elektrotanya . To provide a better review, could you clarify: Is this for a specific device (e.g., an Acer monitor)? ilpi354 va schematic upd
Based on typical, generic 350VA-400VA Uninterruptible Power Supply (UPS) schematics designed for small electronics or computer backups, the ILPI354VA-style unit is a straightforward, cost-effective design.
rated) with higher quality, low-ESR capacitors for better reliability.
Technical Analysis Report: ILPI354 VA Power Supply / Inverter Board Schematic Update The is a critical power supply board primarily
Measure secondary winding resistance of the inverter transformer. Healthy coils should read within 5% of each other.
Check for short-circuits across the primary switching MOSFET or the bridge rectifier diodes. Replacing a fuse with a shorted MOSFET will cause it to blow instantly.
Recap the entire low-voltage rail section using high-quality, low-ESR capacitors (e.g., Nichicon, Panasonic) rated for 105°C. (Backlight drops after turning on) I can give you the specific component numbers to test next
Because official circuit schematics for these proprietary boards are tightly restricted by the original equipment manufacturer (OEM), technicians must rely on component data sheets and circuit tracing to diagnose faults. This updated guide details the block architecture, primary points of failure, component values, and diagnostic steps needed to service the ILPI-354 V.A board without a factory schematic diagram. 1. Technical Architecture & Component Layout
The high-voltage DC is chopped into high-frequency pulses to safely step down the energy through a flyback transformer.
| Pin | Name | Function Description | |------|---------------|----------------------------------------------------------------------------------| | 1 | COMP | Compensation pin – connects to an RC network for loop stability. | | 2 | VFB | Voltage feedback input – from optocoupler (TL431). Inverts output voltage sense. | | 3 | ISENSE | Current sense input – monitors MOSFET source current via a resistor (0.22–0.47Ω).| | 4 | RT/CT | Oscillator timing – resistor to GND, capacitor to Vref sets switching frequency. | | 5 | GND | Ground – return for both power and control signals. | | 6 | OUT | Gate driver output – connects to MOSFET gate (series resistor ~10–22Ω). | | 7 | VCC | Power supply – filtered DC voltage (typically 12–18V). | | 8 | VREF | 5V reference output – for external circuits (max 20mA). |