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The heatsink and speaker bar are readily removed after some screws; they can also come out upon opening, making replacement a breeze.
The fan is, once again, not removable at this point.
The fan's captive screws aren't the only ones holding it in—there are screws attaching it from the reverse side. The fan likely won't need replacing as often as it will need cleaning so this isn't a massive detriment, but does seem an odd design choice.