JYE Tech Forum

It is very hot in 1117 stabilizer. And Stm32. Earlier I wrote that they are cold. I was wrong. Faulty chip? It looks like STM32 was hit by ripple of voltage, and something inside it ( protective diodes at one or more pins ? ) shorted. And may be it getting worse with time... I had the same situatio...

One more idea: check VDDA ( analog power ), better directly at pin 9 of CPU. May be bad soldering, defective PCB ( lines or holes ), defective elements, etc...

In manual, Step 1 "Check the main board" ( switch on without Analog Board ). Be careful - power supply must be good ( Vin filter capacitor 100 uF on analog board now disconnected, so I burned my device :? ). Must be a noise on the screen. If still a line - problem in processor board. Check...

Thank you ! It now works, with replaced processor

I tried to download this firmware file several times, on different computers, but the RAR ( v 5.20 ) says "invalid format - file header corrupted"
Could you reload it ( or maybe newest version ) ?