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Install the Last Four Capacitors
These capacitors are installed on the side of the board where you began assembly. We’ve
left them off the board until now to make it easier to solder the LEDs in place and to
prevent strain on the capacitors.
Be careful of C7, C8, and C13’s polarity when you install them. They are polarized
electrolytic capacitors. Make sure that the positive side of the cap, the end not marked
with the negative sign, goes adjacent to the positive sign on the silk-screen.
50 Volt aluminum electrolytic
50 Volt aluminum electrolytic
Figure 29-Completed controller, push-button and LED side and component side
Fit the Controller into the Front Panel
This section is very do-able, but if you are tense or tired, please take a break before going
on. The LED’s must be precisely aligned for the controller to fit through the front panel.
This will take a little tweaking, but stay calm and it will work just fine.
Notice the pattern of pushbuttons on the controller, and the pattern of holes in the front
panel. Match the patterns, and insert the controller push-buttons through the holes in the
front panel. Wiggle the controller a bit as you gently attempt to insert it into the front
panel.
You’ll most likely note that mis-alignment of some of the LEDs stops the controller from
fully seating on the mounting standoffs and stops the LEDs from protruding evenly
through the front panel.
Make a note of which LEDs are misaligned. Remove the controller, and carefully adjust
those LEDs as needed to fit the front panel holes. You may have to repeat this procedure
3 to 5 times, but if you make small adjustments, everything will line up. It sometimes
help to wiggle the controller PCB when you’re close.
At some point, the controller will seem to pop through the front panel as all the LEDs
pass through the accompanying front panel holes. The forward edge of the LEDs extends
about 1/16” past the front panel. From this point on, it will be easy to remove and re-
install the controller PCB into the front panel as needed so long as you don’t bump into
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