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Document revision 1.1 – Last modification : 10/08/17

SK99 Assembly guide

Safety warning

The kits are main powered and use potentially lethal voltages. Under no circumstance should someone undertake the 
realisation of a kit unless he has full knowledge about safely handling main powered devices.

Please read the “DIY guide” before beginning.
Print or open the following documents :
• SK99 Schematics

• SK99 Components layout
• SK99 Parts list

Follow this guide from item number 1 till the end, in this order. The assembly order is based on components height, from 
low to high profile, in order to ease the soldering process : The component you are soldering is always taller than the 
previously assembled ones and it is pressing nicely against the work area foam.

SK99 Assembly guide

1. Soldering

All the PCB holes are metallized. It means the connection between the top and bottom pads is already 
done. The parts must be soldered only from the bottom side (unless differently stated).
Use only small diameter solder, 0.5 or 0.7 mm, 1mm maximum. Use the minimum possible amount of 
solder. Bad joints are almost always caused by too much solder.
Here are two excellent introduction to soldering videos:
http://www.eevblog.com/2011/06/19/eevblog-180-soldering-tutorial-part-1-tools/
http://www.eevblog.com/2011/07/02/eevblog-183-soldering-tutorial-part-2/ 

2. PCB split

Split the PCB into 3 parts along the lines shown by the red arrows.

3. Pins

Insert and solder the 6 golden pins. The pins are inserted from below the 
PCB. 

The best solution to keep the pins perfectly perpendicular is to use the final 
host PCB (like the MP512, MP599) as a guide: Insert the 6 pins into the 
1mm sockets of the receiving PCB, position the DOA PCB over the pins and 
solder.
It is a good idea to protect the golden pins with some wire insulating sleeve  
before doing other component soldering.

Copyright ©2014 to Today SoundSkulptor

Summary of Contents for SK99

Page 1: ...e connection between the top and bottom pads is already done The parts must be soldered only from the bottom side unless differently stated Use only small diameter solder 0 5 or 0 7 mm 1mm maximum Use the minimum possible amount of solder Bad joints are almost always caused by too much solder Here are two excellent introduction to soldering videos http www eevblog com 2011 06 19 eevblog 180 solder...

Page 2: ...ed vertically cathode black ring up Add D1 D2 D7 D8 D9 1N4148 blue on the picture Add D4 zener 5 1V green on the picture Warning Make sure to respect the direction of the diodes D7 D8 D9 are mis labeled on the PCB follow the layout document 6 LED Add the red LED D3 red on the picture Warning Make sure to respect the long lead short lead direction of the diode 7 Transistors Add Q1 BC560C purple Add...

Page 3: ... R1 to R13 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 brown black black brown 10 Capacitors Add C1 and C2 11 Q9 Q10 assembly Attach Q9 BD139 to the heatsink PCB marked Sound Skulptor with a M3x12 mm screw and a M3x20 mm spacer The transistor is placed on t...

Page 4: ...he main PCB edge then solder the transistor pins Cut the leads sharp Keeping the DOA pressed against the table tighten the 2 screws with a screwdriver 14 Q9 Q10 assembly Solder the 4 pads at the bottom of both heatsinks that connect to the main PCB These solders improve the mechanical stiffness of the DOA and make the electrical connection of diodes D5 D6 15 R1 Pull R1 back a little in order to av...

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