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Last modification : 18/07/17
Switcher Assembly guide
9. Transformer soldering
Apply a small quantity of solder on one of the transformer PCB
pads.
Position the transformer, making sure the dot is in the correct
place and reflow the pad solder to lock the transformer. Adjust
until all the transformer pins are all well centred on their
respective pad. Solder one pin on the opposite row. When the
position is correct, solder all the pins.
10. LM2586
The LM2586 is soldered on the back side of the PCB.
It is a surface mount component with relatively close pins. In order to make
the soldering process easier, we are going to cheat a little:
Lift pins 4 and 6 (counting from the left) and cut them off.
And gently bend pin 1 towards the left.
This gives us a good enough iron access to each pin.
11. Soldering the LM2586
Put a small quantity of solder on the rightmost pad. Place the IC
and reflow the solder, adjusting the position until all the pins are
centred on their respective pad.
Once in position, solder the other pins.
Do not forget that a bad solder joint is almost always caused by
too much solder.
Last thing is to solder the IC top tab to the PCB. Start by
heating the metal tab until the solder flows and goes down to the
PCB.
12. Connecting pins
Insert the 7 long pins from the solder side and solder. It is necessary to put a little pressure on the pins
to insert them all the way down.
13. Pins sockets
Solder the eight 3 pins sockets around the PCB.
Solder one pin first, check the position then
solder the other pins.
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