LDM #364: Aircraft Coffee Maker

Part 1: overview

https://youtu.be/GiQL9kHKi9I

Part 2: reverse engineering

https://youtu.be/SyVm-urduX4

Schematic diagram of the coffee maker:

Coffee_maker_Rev_A_030624

Modification for 115Vac 50/60Hz:

The modification consists to replace the 115Vac/20Vac 400Hz transformer by a 30W AC to DC converter (ECL30UD02-T) which delivers a voltage of 30Vdc.

• Unscrew the right cover which gives access to the electronic board
• Remove the logic board
• Disconnect the 16-pins connectors
• Remove the power supply board
• Desolder the transformer
• Solder four lugs (pins

• On the bottom side of the coffee maker drill the holes according to the image below:

• Place 4 spacers M/F M2.5
• Place an insulator between the power supply and the square bar
• Mount the power supply on the spacers
• Connect the AC-DC converter to the power supply board