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Last modification : 18/07/17
Switcher Assembly guide
4. R5 and Ceramic capacitors
Add R5.
Add C3, C4, C5, C6, C7, C8.
5. Resistors
Add R1 to R4, R6 to R8.
These resistors are installed vertically.
Warning
: It is very important to check the resistors value with a DMM because the colour code can be
ambiguous. For example 1K (brown-black-black-brown-brown) can be confused with 110R (brown-brewn-
black-black-brown).
6. Axial Inductor
Add L1, vertically like the
resistors.
7. Diodes
Add D1, D2 and D3. The diodes are placed vertically,
cathode on top. Bend the cathode lead (marked by a
ring on the diode body).
Warning
: Make sure to respect the direction of the
diodes. The cathode side is marked by a K on the PCB.
8. Copper shorted turn
In order to reduce the transformer radiations we will add a
copper foil turn around the outside of the transformer.
Start by redrawing the dot on the top of the transformer, a
little further in the corner because the original will be hidden
by the foil.
Partially remove the backing tape from the adhesive copper
foil and place it on the top of the transformer, as shown on
the picture. Make a full while removing the backing tape.
Solder the two ends to electrically close the loop.
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