The PSU converts high-voltage AC mains power into low-voltage DC power. In the LJ7 chassis, it typically outputs:
Check the T-Con board ribbon cables and the T-Con board itself. If cables are secure, the issue may be a faulty panel or main board.
Utilize a dedicated (Factory Remote) and press the IN-START or ADJ key.
Verify 120V/240V AC reaches the bridge rectifier. lg lj7 chassis service manual
The typically powers LG’s 2017 lineup of Full HD (1080p) LED TVs. Key models using this chassis include:
Carefully release the locking mechanisms on the flat flexible cables (FFC) connecting the Main Board to the T-CON board. Pulling these cables roughly can permanently damage the gold traces. Alignment, Adjustments, and Service Mode
Converts AC mains voltage into isolated DC voltages. It typically outputs a stable 3.5V or 7.8V standby voltage, a 13.2V rail for the main board components, and a high-voltage boost rail for the LED backlight array. The PSU converts high-voltage AC mains power into
Instructions for updating the webOS platform.
Often integrated into the power board, this circuit drives the LED backlights.
What or error behavior is the TV displaying? Utilize a dedicated (Factory Remote) and press the
Technicians must explicitly copy the correct panel option byte suffix code found on the TV's chassis chassis sticker into the tool menu to prevent image inversion or solarization issues.
Lay the TV face down on a soft, flat table covered with a clean microfiber cloth or foam mat. Remove the base stand assemblies.