The JDM-040 schematic shows a redesigned power management section. The JDM-020 had a single PMIC (Power Management IC); the JDM-040 uses discrete regulators. This makes it harder to fix if the 1.8V rail shorts, but easier to isolate the short because you can cut traces.
The JDM-040 schematic is a complex diagram that requires a good understanding of electronics and circuit analysis. The schematic consists of several key components, including:
The schematic shows two primary fuses near the battery connector and another near the charging system, all typically handling around 3.5V. If a controller won't charge, the "story" often ends with a multimeter finding one of these fuses blown. jdm-040 schematic
Another extensive analysis from October 2019 provides more specific component data for a JDM-040 that had lost USB sync and charging capability. The user identified three missing components, and the community provided these values:
The light shines through the top of the touchpad. The JDM-040 schematic shows a redesigned power management
“The BDM 040 schematic was detailed, but it was still difficult to match the pins to the actual board. I recommend using a multimeter to confirm functions before soldering.” AliExpress
The JDM-040 uses a specific button membrane that is not fully interchangeable with older V1 models. For a step-by-step physical breakdown, you can follow the iFixit Midframe Assembly Guide specifically for this model. (like a resistor or capacitor) or a pinout map for a custom mod? DualShock 4 Controller PCB scans - Acidmods.com The JDM-040 schematic is a complex diagram that
A thin strip of light shines directly through the top of the front touchpad.