Need a specific schematic diagram? Search for "Ilpi-354 service manual" on Russian radio forums (e.g., radiokot.ru or cxem.net) or check user "Mikhail_KA" on archive.org.
The serves as the blueprint for the primary Switched-Mode Power Supply (SMPS) and LED driver board manufactured for various budget-friendly Dell LCD and LED monitors , including the Dell E1916HV Go to product viewer dialog for this item. Go to product viewer dialog for this item. Go to product viewer dialog for this item. . Marked frequently under part numbers like 491A011H1400H03 or 790JX1400603R00
This section takes the low-voltage DC from the SMPS secondary side and steps it up to high-voltage AC (often exceeding 600V AC) to power the monitor's CCFL backlight tubes.
: If the monitor displays an image (visible with a flashlight) but has no backlight, the failure is often traced to the DP860EGN driver or the Q50 MOSFET . Voltage Checks :
While every Ilpi-354 V.a schematic is unique to its serial number batch, the architecture generally follows a standard design. Let's break down the typical blocks you will see on the diagram.
:
: A dedicated section of the board regulates the current sent to the LED strips that illuminate the screen. Safety Isolation
:
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
At the heart of the schematic is the Pulse-Width Modulation (PWM) controller IC paired alongside a heavy-duty power MOSFET. The PWM controller pulses the gate of the MOSFET to high frequencies (typically 50kHz to 100kHz). This action chops the high-voltage DC across the primary winding of the main flyback isolation transformer. 3. The Secondary Rectification & LED Driver Stage
MOSFET driver often paired with the LED backlight circuitry. Voltage Outputs: Typically provides a stable output to the main logic board and roughly 17.5V - 18V to the backlight driver stage. 2. Device Compatibility
Need a specific schematic diagram? Search for "Ilpi-354 service manual" on Russian radio forums (e.g., radiokot.ru or cxem.net) or check user "Mikhail_KA" on archive.org.
The serves as the blueprint for the primary Switched-Mode Power Supply (SMPS) and LED driver board manufactured for various budget-friendly Dell LCD and LED monitors , including the Dell E1916HV Go to product viewer dialog for this item. Go to product viewer dialog for this item. Go to product viewer dialog for this item. . Marked frequently under part numbers like 491A011H1400H03 or 790JX1400603R00
This section takes the low-voltage DC from the SMPS secondary side and steps it up to high-voltage AC (often exceeding 600V AC) to power the monitor's CCFL backlight tubes. Ilpi-354 V.a Schematic
: If the monitor displays an image (visible with a flashlight) but has no backlight, the failure is often traced to the DP860EGN driver or the Q50 MOSFET . Voltage Checks :
While every Ilpi-354 V.a schematic is unique to its serial number batch, the architecture generally follows a standard design. Let's break down the typical blocks you will see on the diagram. Need a specific schematic diagram
:
: A dedicated section of the board regulates the current sent to the LED strips that illuminate the screen. Safety Isolation Go to product viewer dialog for this item
:
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
At the heart of the schematic is the Pulse-Width Modulation (PWM) controller IC paired alongside a heavy-duty power MOSFET. The PWM controller pulses the gate of the MOSFET to high frequencies (typically 50kHz to 100kHz). This action chops the high-voltage DC across the primary winding of the main flyback isolation transformer. 3. The Secondary Rectification & LED Driver Stage
MOSFET driver often paired with the LED backlight circuitry. Voltage Outputs: Typically provides a stable output to the main logic board and roughly 17.5V - 18V to the backlight driver stage. 2. Device Compatibility