F4901 1.1a 24v Schematic -

| Component | Value/Rating | Function in the F4901 | | :--- | :--- | :--- | | | 1.5A / 250V | Input protection. If blown, check bridge rectifier and MOSFET Q1. | | C2 | 100µF / 400V | Bulk capacitor. High ESR here causes 100Hz ripple and overheating. | | R2 | 150kΩ (1W) | Startup resistor. If open, the IC never starts. | | Q1 | 4N60 (4A, 600V N-MOS) | Primary switching transistor. Known failure point. | | R3 | 0.68Ω (1%) | Current sense resistor. If value drifts >10%, output current limit changes. | | T1 | EE19 or EE22 core | Transformer. Turns ratio: Primary:Vcc:Secondary = 100:15:12 (approx). | | D1 | SB3100 (3A, 100V) | Output rectifier. Must be ultrafast or Schottky. | | C3 | 470µF / 35V (Low ESR) | Output filter. Failure causes 24V rail noise. | | U3 | TL431 | Precision shunt regulator. Sets output to 24V via R5/R6 divider. |

Acer Aspire 5560G черный экран • Notebook1 форум f4901 1.1a 24v schematic

To summarize the search for this schematic: | Component | Value/Rating | Function in the

is typically located within the or Backlight circuit. High ESR here causes 100Hz ripple and overheating