The primary side of the power supply unit (PSU) is directly connected to the AC mains ("Hot"). Always use an isolation transformer when measuring voltages in this area.
Panel power failure or communication error between the main board and the T-CON board. Continuous Blinking: Backlight error circuit triggered. Conclusion
) to power the mainboard, and high-voltage DC to drive the LED backlight strips. sharp lc-32le150m service manual
The Sharp LC-32LE150M relies on three main internal modules: Power Supply Unit (PSU)
12V DC for the audio amplifier and general main board logic. The primary side of the power supply unit
pixels. As a multi-system television, it supports various video formats including PAL, SECAM, and NTSC, and operates on a universal power range of 110–240V.
Place the TV face down on a clean, soft cloth or foam pad to avoid scratching the LCD panel. Continuous Blinking: Backlight error circuit triggered
Test the LED driver output voltage on the PSU. If the voltage spikes briefly when powering on and then drops to zero, the TV's protection circuit is engaging because one or more LED strips behind the screen have failed open-circuit. Symptom 3: Blinking Error Light (Red/Amber LED Flashes)
Check the voltage output on the LED backlight connector. If the voltage spikes briefly when powering on and then drops to zero, the protection circuit is tripping due to an open circuit (burnt-out LED strip inside the panel). 6. Entering Service Mode (Factory Menu)
Carefully unlatch the LVDS ribbon cable connecting the main board to the T-CON board, and disconnect the power rails. 4. Major Circuit Boards Explained