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8.1
Front
8.1.1
Push buttons (x8) & display
P1
8. Bottom PCB assembly
Before placing and soldering the
push buttons, place the 7 segment
display on the PCB. Pay attention to
the orientation, the dot is on the
bottom line. Sometimes, its legs can
be a little bent thus hard to get
through the holes. So place the
display but don’t solder it and then
the buttons.
The buttons need to be upright and
pushed well against the PCB. An
imprecise mounting will result in a
cap scrapping against the front
panel. We recommend you to place
the buttons, then flip the PCB
(holding the buttons in place with a
piece of cardboard) and press it
against a table.
At the final step, if a button is not well
aligned with the front panel, you can
gently re-heat its solder points and
push it into alignment.
