Photos of our (dusty) JLD80W laser cutter power supply:
Below, dual Flyback transformers with main 22KV laser tube output (anode) wire at bottom left:
Below, bottom of power supply board showing 4 main switching MOSFETS that drive the flybacks. The white residue is normal. It’s thermal compound that helps transfer heat to the outer case :
Below, Side view showing daughter board, the logic control “brains” of the power supply and (current?) calibration pots in blue near top:
Below, Top down view of main PS board showing flybacks on the left and the big blue filter capacitors that feed them with DC (rectified) mains power The four black lumps below them are the main bridge rectifier and the LC line filter capacitors and inductor. Below them are two ceramic power fuses (white) and the RF suppression caps (small blue) and control logic wiring connectors (green).
So far, no obvious visual signs of physical damage such as burning, arcing, blown caps or cracked solder joints. Will do more in depth testing at next opportunity. Will any key holders be at VHS tonight? I don’t see any calendar entries for this evening.