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Power Supply:

Power supply is the first part to be built. Prepare all parts before starting will avoid that you were wrong. Buy transformer before beginning assembly because you need it to test the power supply.

 

Here is the part list:

Image

DescriptionPartValueQty
Transformer 15VAC 1000mA (not included)  1
2,1mm power jack15VACPower Jack

1

Multilayer ceramic capacitor (104)C2, C6, C9, C10100n4
 Electrolytic capacitorC3680/351
Electrolytic capacitorC5, C72200/352
Electrolytic capacitorC11220/351
Electrolytic capacitorC12, C13100/352
 Rectifier diodeD1, D2, D3, D4, D5, D6, D101N40047
Schottky diodeD71N58221
Positive voltage regulatorIC178151
Step-Down Voltage RegulatorIC2LM25961
Negative voltage regulatorIC579151
Headsink  2
InductorL133uH1

 

And here is the list of Main_Board components :

ImageDescriptionPartValueQty
Electrolytic capacitorC16, C18, C20100/103
Electrolytic capacitorC24*, C25*, C26*, C27*, C37, C44, C46, C62, C64, C79, C80, C84*, C85*, C86*, C87*, C88*, C89*, C93, C94, C106, C107, C123, C124, C147, C14847/1625
1/4w Carbon resistorR78*, R79*, R80*, R81*, R151, R164*, R165*, R167*, R168*, R170*, R171*, R178, R179, R208, R209, R236, R237, R264, R265, R292, R293, R328, R329, R379, R380100R25

 


Make it:

 

We're off on this adventure.Place all the power diodes. They are in red circled  in the picture. Click on the picture to enlarge if necessary.

Diodes are directional, make sure the white stripe at the end of each diode matches the silkscreen.

 

Then comes the turn of multilayer capacitors of 0.1uF
Bend the capacitors 2200uF leads, this so it does not touch the Main_Board when you assembly all in the box.

Now solder electrolytic capacitors and inductor L1.

Make sure they are placed correctly, with the negative stripes as shown on silkscreen

Bend  LM2596 leads like this
And bend regulators leads like this

Now solder the power connector and the three regulators. Do not forget to put the radiators on both 7815 and 7915 regulators.

 

BEWARE OF PLACE EACH REGULATOR ON HIS RIGHT PLACE

Connect  power supply to the IO_board and test voltage on pads +5 v, +15 v,-15v. The value may vary by plus or minus 5%. Example, if you measure 14.6V on the +15 v pad is OK.
Cut four wire long enough to turn the Main_Board during assembly and solder to the pads.
Now to the Main_Board. Start by soldering all the resistors 100ohms framed in red in the picture.
Solder the vertical resistors like this. Always put the body of the resistor on the side where there is the circle on the silkscreen.

Solder the electrolytic capacitors.

PAY ATTENTION TO THE POLARITY! PICTURE IS WRONG FOLLOW THE SILKSCREEN

The red boxes show you where the capacitors are placed

Connect the two boards with four wire.

CONNECT WELL IN +15 V TO +15 V,-15V TO THE-15V, GND TO GND AND THE +5 V TO +5 V.

It can happen that by turning over and over the Main_Board one wire breaks.

SURE EVERY FUTURE  POWER SUPPLY TESTED THAT THE FOUR WIRES ARE ALWAYS CONNECTED.


And we're done with the power you can move on to built  the Noise part.