12-19-2019, 08:22 AM
(12-18-2019, 04:01 PM)hmuller Wrote: @tsys ,
I performed a physical clearance test of the PCB and it did not pass on my unit.
I took card stock and built it up (including scotch tape) to a 3.0 mm height, creating a test dummy. The rectangular dimensions of the test dummy were approximately the same width and length of the PCB (14.6 mm x 7.8 mm). I placed the dummy over the site it would be installed, over the audio amplifiers. Then the top surface was coated lightly with black pastel. A strip of white Post It note (with adhesive) 0.1 mm thick was stuck to the bottom magnesium case over the site the PCB would be over.
The combined height of the Post It note and the test dummy is 3.1 mm. This is the same height as the PCB (1.6 mm) combined with the height of the tallest component, L1, the inductor (1.5 mm). Note that the full height of the dummy extends to the full face of the rectangle, and not the surface area of the top of the inductor which is indeed smaller.
Unfortunately the test dummy created a full impression on the Post It note indicating there is little or no clearance for the regulator board in my particular unit. As there are bound to be variations between units, you may find this is not an issue with your unit.
But I may have a solution which may work but it will require a slightly different design. I will share the details later. I have not been in a rush, as I have to spend about $200 USD on equipment to do the actual PCB rework, aside from the board manufacture costs.
Oh wow, thanks for the extensive testing! I didn't got through that lengths to ensure it does actually fit since I do have all the equipment to just build and try it once the PCBs arrive. I don't think this is a solution many people will implement though. When shooting for something that is less janky one should probably just add a step-up to the M.2 adapter board.
