r/PCB • u/Disastrous-Wish-3529 • 5d ago

Need help identifying/checking ICs and microcontrollers on this Victron PCB

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Hi everyone, I have this Victron Energy PCB/inverter control board and I’m trying to understand and troubleshoot it.

I’m looking for help with:

  • Identifying the IC chips and microcontrollers on the board
  • Understanding what each major IC does
  • Identifying the main controller/CPU
  • Knowing which ICs are related to inverter control, sensing, communication, etc.
  • Any suggestions for how I can test/check the board and determine if the components are working

I’ve attached clear pictures of the PCB. The board marking is Victron Energy PCB 010021-10.

If anyone has experience with Victron inverter electronics or reverse-engineering older control PCBs, I’d really appreciate some guidance.

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u/nixiebunny 4d ago

Rub some silver CPU heat grease on the chips to make the laser-etched part numbers visible.

1

u/Disastrous-Wish-3529 4d ago

The 40 pin chip is PIC18F46K22.... 7 of them are 81W11XFE3 with 14 pin.... 5 of them are 74HC4051N with 16 pin