Jacques GagnonFinally done testing and reworking the PCB v1.1 . The PCB design is good, nothing need to be change. The new ESD array chips I used are a lot easier to work with. In any case the next batch will be assembled by professionals. I will keep those boards for my own personal tests.
I followed the following checklist while testing and reworking the boards. It's very helpful to not forget any step!
| Items | Notes |
| Check for short between supply and ground | VBUS_C, VBUS, 3V3_USB, 1V8, 3V3 |
| Check U2 alignment and pin short | Visualy with magnifying glass. |
| Check U3 for short. | Make sure 3 pins are not short with multimeter. |
| Check U4 for short. | Visualy with magnifying glass. |
| Check U6 for short. | Visualy with magnifying glass. |
| Test USB | Validate LED is on and that PC detect both UART. In FT-Prog utility validate EEPROM is detected. |
| Check U7, U10, U11, U12, U13 for short on internal side. | Check with multimeter on ESP32 side. |
| Check U7, U10, U11, U12, U13 for short on external side. | Check with multimeter on connector contacts. |
| Check U1 for short. | Check with multimeter between each adjacent pins. |
| Check U7, U10, U11, U12, U13 continuity between connector & ESP32. | Use multimeter to measure resistance. Should 100 Ohm. |
| Program ESP32 via USB UART. | Place jumper on TX & RX on UART header. Place power jumper on VBUS. Validate programming is done without requiring any press on switches. Check USB TX & RX LEDs. Validate Green power led is ON. |
| Test Switches | Hold reset switch, validate error LED is on, release reset and validate error switch goes off. Press Boot switch and validate message appear in UART logs. |
| Test JTAG | Program JTAG FW & populate JTAG jumpers. Test connection. |
| Test SD card. | Reprogram regular FW, insert SD card & validate no error in logs. |
| Connect 7 Bluetooth controllers | Make sure radio is working fine. |
| Try will all supported systems | Test with DC, Saturn, N64, NGC, NES, SNES & JVS. |
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