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Here you can see the Zener diode
installed in the correct orientation.
Electrolytic Capacitor Installation
Capacitors (Electrolytic)
Do not install C2 and C4 at this stage
We are now going to install the Electrolytic Capacitors into
the power supply Board. Note that C2 and C4 will be
installed at a later stage.
Electrolytic Capacitor Lesson: An electrolytic capacitor is
a device that has a positive and a negative side to it. In
other words it MUST be installed correctly or it will basically
explode. Luckily the modern capacitors have a slow
explosion mode that will look like a dragon breathing fire.
Let‟s begin by installing C3.
You will notice that the capacitor has some markings on it -
a 68 for 68uF, a 450 for 450Volts, and a large strip down
one side which signifies the NEGATIVE side of the
capacitor.
You will notice on the stencil on the PCB that there is a +
designator on the board and you will need to orient such
that the + side is the opposite to the NEGATIVE stripe -
The electrolytic capacitor also has a longer lead on the
POSITIVE side.
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