Use these exact terms in Google or repair forums:
It looks like you're referencing a specific piece of hardware: BDL51 LAD711P REV 30 — likely a power supply or main board from an LCD TV (possibly a Samsung or LG chassis, given the naming pattern). bdl51 lad711p rev 30 schematic work
However, I cannot directly provide a downloadable schematic file or a proprietary feature code for that board. But I can help you find the correct feature, identify what you likely need, and point you toward how to obtain the schematic. Use these exact terms in Google or repair
| Section | Key Components | Purpose | |--------|----------------|---------| | Input EMI/rectification | Fuse, varistor, bridge rectifier | AC filtering and DC conversion | | PFC stage | MOSFET, inductor, PFC IC (e.g., LAD711P?) | Boost to ~380–400V DC | | Main PWM converter | PWM IC, transformer, secondary rectifiers | Generate main output voltages (e.g., 12V, 24V) | | Standby power | Small flyback IC, transformer | 5V or 3.3V always-on | | LED backlight driver | Boost or buck topology, LED current sensing | Constant current for LED strips | | Section | Key Components | Purpose |
Based on field repair data, these parts fail most often on REV 30:
| Component Label | Type | Typical Value | Failure Mode | Substitute | | :--- | :--- | :--- | :--- | :--- | | F801 | Fuse | T3.15A / 250V | Blown | Same rating, slow-blow | | IC601 (Standby) | VIPer22A | DIP-7 | Short from VDD to GND | VIPer22A (STMicro) | | R821, R822 | Startup resistors | 2 x 2.2MΩ (1/4W) | Open circuit (no 5VSB) | 2 x 2.2MΩ or 1 x 4.7MΩ/0.5W | | Q701 (LED MOSFET) | N-Channel | 8N60 (8A, 600V) | Drain-source short | 10N60, 12N60 | | R861, R862 | Sense resistors | 0.33Ω / 2W | Open or changed value | 0.33Ω, 0.27Ω, or 0.39Ω (keep pair matched) | | C801 (Main cap) | Electrolytic | 100µF 450V | Bulging, low capacitance | 120-150µF, 450V, 105°C |
Important Mod: If the TV exhibits flickering backlight on REV 30, add a 10kΩ resistor in parallel with the OVP resistor divider (from LAD711P pin 3 to ground). This raises the OVP threshold slightly but only do this if you have confirmed the LEDs are good.