Jdm-040 Schematic -

The JDM-040 schematic reveals the analog stick circuit as two separate potentiometer arrays per stick (X and Y axes). Unlike the JDM-020, which used a rigid connector, the JDM-040 solders the analog stick module directly to the board. The schematic traces show that each stick uses a 3.3V reference voltage (VREF) split across a voltage divider. When the carbon wipers wear down, the returning voltage (VIN) gets stuck at a non-neutral value (either stuck high or low).

Critical trace to check on the schematic: pin 1 of the analog stick (Left Stick X-axis) connects to an ADC (Analog to Digital Converter) input on pin 24 of the main SoC. jdm-040 schematic

Understanding the major components on the JDM-040 board is essential for tracing schematics: The JDM-040 schematic reveals the analog stick circuit

If you are repairing a controller without a full visual schematic, you often need to probe specific points. When the carbon wipers wear down, the returning