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Switch4 v1.1/1.2 – Assembly Guide
Thank you for purchasing this module! This is an average build with some precision integrated
circuits. Some of the pads are quite small and you will need a chisel tip or screwdriver tip soldering
iron and the skill to solder these tiny joints.
The module is designed and sized for Eurorack systems. You will need a 16-10 pin eurorack power
ribbon connector with –12/0/+12 which is connected to a synth power supply.
Follow the parts lists, these instructions and the PCB silkscreen text to build the module.
The module consists of 1 PCB board and a front panel.
You must follow the order of assembly as described below since some components will be soldered
underneath other components.
Page 1 of 13
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Summary of Contents for PMFoundations Switch4
- Page 1 Switch4 v1.1/1.2 – Assembly Guide Thank you for purchasing this module! This is an average build with some precision integrated circuits. Some of the pads are quite small and you will need a chisel tip or screwdriver tip soldering iron and the skill to solder these tiny joints.
- Page 2 Constructing the board 1. Resistors Install the flat resistors on the TOP of the board. Solder and clip the leads. 2. Diodes Install the diodes on the TOP of the board. These are polarized components. Align the stripe on the diode with the stripe marked on the board. Solder and clip the leads. Page 2 of 13...
- Page 3 3. IC Sockets Now Install the sockets on the TOP of the board. Observe the notch or mark on the sockets and align with the notch or mark on the board. Solder. Page 3 of 13...
- Page 4 4. Power socket Version 1.1 boards have a right angle socket: The cut-out in the socket should face the top. Solder on the underside. Version 1.2 boards have a straight socket: The cut-out in the socket should face the jacks. Solder on the underside.
- Page 5 V1.1 Power V1.2 Power. Page 5 of 13...
- Page 6 5. Ceramic/film/polypropylene capacitors Install the ceramic/film capacitors on the TOP of the board. Solder and clip the leads. 6. Transistors and Voltage reference Install the transistors and voltage reference on the TOP of the board. These are polarized components. Align the outline with the outline on the board. They should be raised off the board surface slightly and at the same height.
- Page 7 Tack one pin only with solder. This will be finalized later. Please ensure it is on the CORRECT SIDE OF THE BOARD. 8. Electrolytic capacitors There are no electolytic capacitors that need to be installed. Earlier boards had space for them but they are not required.
- Page 8 Tack one pin of each only with solder. These will be finalized later. Please ensure they are on the CORRECT SIDE OF THE BOARD. 11. Alignment 1. Place the front panel over the board so that the 3.5mm jacks and pot align with the holes in the panel.
- Page 9 Use the panel to guide the position of the LEDs. Green: Insert from the top and solder on the bottom. Red: Insert from below and ALSO SOLDER ON THE UNDERSIDE only. You cannot reach the pins on the other side of the board! Be careful not to bridge onto the jack pins. Clip the leads if you can.
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Page 10: Voltage Tests
13. If you do not trust all your soldering and connections, carry out the voltage tests below before installing the remaining ICs Voltage tests 1. You do not have to do these tests if you are completely happy with your soldering and are sure there are no bridges or incorrectly placed components. -
Page 11: Final Assembly
d. At IC2 pin 4 approx = -12V e. At IC2 pin 2 approx = +1V At IC3 pin 14 approx = +12V g. At IC3 pin 7= 0V h. At IC4 pin 3 approx = +12V At IC4 pin 12= 0V At IC5 pin 14 approx = +12V k. - Page 12 Page 12 of 13...
- Page 13 Page 13 of 13...
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