Lm495 Mb 11269-2 Schematic-- !link! Download File

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Locate the backlight fuse (usually labeled 'F' near the LVDS/EDP connector) on the schematic. Lm495 Mb 11269-2 Schematic-- Download

| Symptom | Likely Cause | How to Test (No Schematic) | |---------|--------------|----------------------------| | No 5VSB | Open startup resistor (2‑4 MΩ) or shorted standby IC | Measure large capacitor (~160VDC) – if present, check Vcc pin on standby IC | | 5VSB present but no main rails | Main PWM IC not getting Vcc (often from auxiliary winding) | Trace from main IC’s Vcc pin to diode/cap – replace if low | | Backlight flashes then TV dies | PFC not rising (should be ~380‑400V) | Measure across main bulk cap – if 160V instead of 380V, PFC stage is dead | | Blown fuse & shorted MOSFET | Bridge rectifier or MOSFET shorted | Check diode mode across drain‑source of main MOSFET | | Audible squeal / ticking | Overload on secondary (shorted rectifier) | Check 12V or 24V diodes with multimeter (diode mode) | – I can’t generate content that encourages searching

(Note: Please ensure you have a PDF reader installed. If the link is temporarily down, try searching for "National Semiconductor LM495 Application Note" or "LM495 Boomer Series Datasheet" as a reference.) If the link is temporarily down, try searching

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