T.sk105a.03 Schematic Diagram -

The schematic will show a grid. Rows (R0, R1, R2) and Columns (C0, C1, C2). When a key is pressed, it shorts a row to a column.

If you cannot find the official schematic, create your own. T.sk105a.03 Schematic Diagram

Before powering on, you must set the jumpers to match your panel's voltage (typically 3.3V, 5V, or 12V ) to prevent permanent damage to the LCD panel. The schematic will show a grid

: HDMI, VGA, AV, and USB (used for firmware updates and media playback). R2) and Columns (C0

: Usually a 25Q32 (4MB) SPI Flash chip which stores the firmware.