17ips72 Schematic Work -

The (often derived via a step-down regulator from the 12V rail or a dedicated winding) keeps the TV microprocessor alive to look for remote control signals. Feedback Loop and Optocoupler

A voltage spike or thermal runaway causes the main primary switching MOSFET to short out across its Drain and Source pins. This passes high voltage backwards, destroying the delicate PWM controller IC. 17ips72 schematic work

Provides overcurrent protection. If a catastrophic short circuit occurs down the line, this fuse blows to prevent fire. The (often derived via a step-down regulator from

Check fuse F100. If it is open, check the bridge rectifier diodes and the main switching MOSFET for shorts. If the MOSFET is shorted, the PWM controller IC is likely dead as well. Blinking Standby Light / Constant Rebooting Provides overcurrent protection

: Check the 3.15A fuse and the four rectifier diodes. Shorted diodes are a frequent cause of blown fuses .