Introduction
This is a teardown guide for the auto-empty dock, model Onyx3, for Roborock's robotic vacuums.
This guide does not show how to get to the suction fan, and mostly focuses on the motherboard/PSU.
I may update it further in the future.
Tools
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            Let's begin by removing its ramp. Flip it on it's head. 
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            Use a PH2 screwdriver to unscrew the screws, then take the ramp off. 
 
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            Take out the PCBA+PSU assembly. 
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            Remove the connecting cable between the PSU and the main PBCA. 
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            Unscrew the PSU. 
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            Remove the PSU. 
 
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