BUMM IQ-XS Bike Front Light Busch & Müller Teardown

ID: 132285

Description: The IQ-XS by Busch and Müller appears in a very...

Steps:

1. The aluminium housing is made from one piece, so access to the inside is only by removing the front lens.
2. The chassis is held to the aluminium housing by the same T15 torx screw that also holds the mount in place. Remove this screw first.

3. The lens is held in place only by the two notches to the left and right. They are wedge-shaped in profile.
4. The visible black ring is a thin layer of rubber and acts as water sealant. It doesn't contribute importantly to fixation of the lens, may be damaged though during disassembly.
5. Start removing the lens on one side. The other side will come out by itself without more prying. Us a narrow and flat spatula on one side of the housing to guide the lens notch out of the slit in the aluminium housing.
6. You may need a second spatula to push against the notch from through the slit.

7. Gently pull out the entire interior to the front. The LED circuit board is attached to another aluminium heat sink plate. This is not attached to the main aluminium housing though and just slides out together with the LED circuit board.

8. Complete steps in reverse order to reassemble.
9. Of note: The main circuit board has three holes that center it on the 3 plastic suspensions of the main chassis. Take care to align those properly (consider using a drop of glue on each of the suspension pins to keep it in place).
10. If they don't align, the LED circuit board will stick out 1mm in the front, preventing the lens from snapping in place properly. This will result in a gap between rubber ring and housing, where water may leak in.
11. I recommend UHU Por styrofoam glue for this purpose, as it doesn't damage the plastic or circuit board and remains flexible as it dries up.
12. Same method may be used to hold the silicone back cover in place during reassembly.
13. Good luck!