Lg Lj7 Chassis Service Manual [upd] -

| Board Type | Common Part Number Prefix | Function | | :--- | :--- | :--- | | | EAX677... | Signal processing, OS (webOS), Audio/Video output, Wi-Fi. | | Power Board | EAX675... / EAY628... | AC/DC conversion, 12V/24V generation for Main & Backlight. | | T-CON Board | 6870L-... | Timing control for LCD panel (often integrated or logic-only). |

This manual is a lifesaver for the notorious LJ7 "no power" issue. The power supply schematic is 100% accurate. However, the digital copy is scanned poorly—pages 34-40 are almost unreadable. Also, LG changed the resistor spec on the 2nd revision of this chassis, and the manual doesn't note that. For pros only. lg lj7 chassis service manual