ThermoFisher XTR Centrifuge Main board Repair - Latch Issues & E44/E45 Errors

What's up y'all! in this video I repair a ThermoFisher Sorvall Legend XTR Centrifuge main PCB. The end user stated that one of the latches was not working. After fixing the latches, I discovered the unit was also triggering E44 and E45 error codes. Also, it appeared that an unknown substance was spilled on the board. Fortunately this one ends in a successful repair!

this is the first time I repaired a board for a customer outside my current employer. so it was an exciting experience. This was sent in by a viewer of the channel. I'd be interested in doing more work like this so if you have lab equipment circuit boards you'd like repaired, and you enjoy the channel, please feel free to reach out via my email in my bio! Thanks for everyone's continued support!

EDIT: Turns out there is an available service manual that includes schematics for the Thermo GP3 style (i.e. XTRs) centrifuges! Link here: chrome-extension://efaidnbmnnnibpcajpcglclefindmkaj/https://www.ozarkbiomedical.com/pdf/S...

Other Thermo XTR centrifuge main PCB repairs I've done with different errors/issues:    • ThermoFisher Sorvall Legend XTR Main ...  
   • ThermoFisher XTR Centrifuge Main PCB ...  

0:00 – Intro/Overview
3:20 – Fault symptom investigation
6:15 – Visual inspection of PCB
8:40 – Replacing R390 & C78
9:45 – Post-repair testing… no dice
10:40 – mapping out & testing the lid latch circuitry
19:30 – replacing L14 ferrite bead array
21:45 – post-repair testing… success! (maybe??)
24:11 – replacing K9 & K10 relays
25:30 – E44/E45 errors during final testing!
27:35 – troubleshooting E44/E45
37:40 – investigating K11/K12 relays
39:45 – replacing D36… no dice
42:50 – investigating K8 miniature contactor
47:25 – investigating/replacing R291
51:50 – replacing R291 and post-repair testing… success!
55:50 – final testing (latches, speed & temp accuracy)
58:53 - Outro