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Sound Skulptor EQ250 Assembly Manual

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EQ250 Assembly guide
Safety warning
The kits are main powered and use potentially lethal voltages. Under no circumstance should anyone undertake the
realization of a kit unless they have full knowledge about safely handling main powered devices.
Please read the "DIY guide" before beginning.
Print or open the following documents :
• EQ250 Schematics
• EQ250 Components layout
• EQ250 Parts list
• EQ250 Setup guide
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.
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 below (unless differently stated).
Use only small diameter solder, 0.5 or 0.7 mm, 1mm maximum. Use just the minimum necessary amount
of solder. Bad joints are often masked by too much solder.
Cut the component leads and pins totally flush with the PCB after soldering. A too long tail could create
an electric connection with the side plate.
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/
EQ250 Assembly guide – PCB A
1.
PCB split
Split the PCB along the groove. Use extra thin sandpaper to polish all the rough sides.
Copyright ©2024 to Today SoundSkulptor
Document revision 1.1 – Last modification : 27/01/25
www.soundskulptor.com

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Summary of Contents for Sound Skulptor EQ250

  • Page 1 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/ EQ250 Assembly guide – PCB A PCB split Split the PCB along the groove. Use extra thin sandpaper to polish all the rough sides. Copyright ©2024 to Today SoundSkulptor...
  • Page 2 Document revision 1.1 – Last modification : 27/01/25 EQ250 Assembly guide – PCB A Resistors Here is a good method for selecting and installing the resistors: 1. pick a row of resistors in the resistors bag, 2. Measure one of the resistors with your DMM, 3.
  • Page 3 Document revision 1.1 – Last modification : 27/01/25 EQ250 Assembly guide – PCB A IC Socket 2x4 pins Insert and solder the eight 8 pins IC sockets. Warning : Make sure to respect the DIL sockets direction, marked by a notch.
  • Page 4 Document revision 1.1 – Last modification : 27/01/25 EQ250 Assembly guide – PCB A 14. 2x5 headers Insert the headers into their position J1a to J5a, short end first and solder one pin. Check the verticality, reflow if necessary then solder the other pins.
  • Page 5 Document revision 1.1 – Last modification : 27/01/25 EQ250 Assembly guide – PCB A 16. 35mm fem/fem Spacers In each of the 4 corners of the PCB, insert an M3x6mm screw into the hole provided from the back face, insert 3 washers and screw in the spacer.

  • Page 6: Ceramic Capacitors

    Document revision 1.1 – Last modification : 27/01/25 EQ250 Assembly guide – PCB B 20. Diodes Add D2, D5, D6. Bend the leads at 0.4”. 21. IC Socket Insert and solder the eight 8 pins IC sockets: Warning : Make sure to respect the DIL sockets direction, marked by a notch.
  • Page 7 Document revision 1.1 – Last modification : 27/01/25 EQ250 Assembly guide – PCB B 25. Test pins Solder 10 test pins TP8 to TP14, V+, V- and 0V. 26. Small Polypropylene capacitors Add C60, C58, C56, C63, C61. 27. Trimmer potentiometers Add TR3 and TR4.
  • Page 8 Document revision 1.1 – Last modification : 27/01/25 EQ250 Assembly guide – PCB B 34. Potentiometers Add the 5 potentiometers P6, P8, P10, P12, P14 on the back side of the PCB. Solder one pin first, check the position then solder the other pins.
  • Page 9 Document revision 1.1 – Last modification : 27/01/25 EQ250 Assembly guide – PCB C 38. Potentiometers Add the five 2x4 pins potentiometers P1 to P5. Solder one pin first, check the position then solder the other pins. 39. 25mm pin headers Add the two 2x5 pins header J6b and J7b.
  • Page 10 Document revision 1.1 – Last modification : 27/01/25 EQ250 Assembly guide – Final assembly 42. PCB C Position the 2 headers of PCB C in front of the matching sockets of PCB B and press gently until contact is made.
  • Page 11 Document revision 1.1 – Last modification : 27/01/25 EQ250 Assembly guide – Final assembly Copyright ©2024 to Today SoundSkulptor...