Repairing a dead Neato blower motor

[LazyRoomba]

After fixing numerous issues with my Neato, It finally came to 1 more issue. A dead blower fan. Everytime it was switched on, Neato would reboot with "I had to reset". I removed the blower fan from the Neato and attached it to my bench power supply. Sure enough, it was drawing over 5 amps and wasn't spinning up correctly.

I took apart the fan to find a bunch of mosfets, and started to probe them. I eventually found one that had a short from drain to source/gate. I didn't have a spare lying around, so I used a charging fet from my donor Roomba PCB (:D).

Dead mosfet:
http://download.siliconexpert.com/pdfs/ ... fr5305.pdf

Charging fet:
http://www.diodes.com/_files/datasheets/ZXMP6A17G.pdf

Blower now winds up slowly, just like a jet.

[glnc222]

Added to the Neato Forum index of Mods & Repairs for future access. Most Neato repairs are posted in the Neato forum, compared to hacking redesigns.
Fan info "Inside the XV-11 Vacuum Motor" http://www.robotreviews.com/chat/viewtopic.php?f=20&t=15446&hilit=inside+fan

[LazyRoomba]

Quick update. Blower working fine, done several cleaning cycles with no issues to report.