Transistor crack all fatal errors fixed: How to play the game smoothly

I repaired 2 AOS 7144s, units did not generate mist. One unit had the blown fuse / water leak problem described in this Instructible, and the other unit showed no visible signs of water or a blown fuse. What I found was the power transistors were bad in both units. I replaced the printed circuit board blown fuse with a chassis mounted fuse holder and correct valued fuse. I sealed the cracked ultrasonic nebulizer surround with K6 adhesive. I put a healthy amount of silicone grease around the O-ring, the nebulizer mounting, and replaced the bad power transistor. The second unit only required a new power transistor. Both units work like new. Also, many of the components in the circuit diagram posted in this thread are different than those on my boards.

Transistor crack all fatal errors fixed

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