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Step 25

Insert the IC in it's socket.

IC2

 LM324

Step 26

Cut off the small metal tab sticking out on the potentiometers. Use a cheap plier/nipper for this

step, save your expensive ones for other tasks. Mount 1 washer and 1 nut on each 
potentiometer. Make sure the nuts are tight. Sometimes we ship the kits with Alpha 

potentiometers, they are clearly marked with "Alpha" on them and in that case no washer or 
nut is needed under the panel.

Summary of Contents for PCB1 1.0

Page 1: ...ance 7mm resistor 1 100R R23 1 4W 7mm resistor 2 10R R1 R2 1 4W 7mm resistor 3 1K R6 R26 R39 1 4W MLCC X7R 14 100nF 2 5 2 54mm pin pitch MLCC C0G 1 33nF C21 2 5 2 54mm pin pitch TDK recommended MLCC C...

Page 2: ...Assembly instructions We start with PCB2 Empty PCB2 top bottom...

Page 3: ...Step 1 Solder small ca 3 5mm resistors Resistors are not sensitive to mounting direction R16 680K R22 R34 68K...

Page 4: ...R30 47K R28 4 7M...

Page 5: ...R31 330K R25 12K...

Page 6: ...to solder a bridge jumper across the two pins closest to the PCB edge on R37 and R38 The position is marked by arrows in the pictures If you have PCB2 version 1 1 you can skip this it s unnecessary b...

Page 7: ...are not sensitive to mounting direction R26 R39 1K Step 3 Solder ceramic capacitors Ceramic capacitors are not sensitive to mounting direction C7 C8 C11 C12 C13 C14 C15 C16 100nF The last ceramic cap...

Page 8: ...Step 4 Solder IC sockets Match the IC sockets indent marking pin 1 side with the silk screens IC3 IC4 IC5 8 pin DIP sockets IC s will be mounted later IC1 16 pin DIP socket IC will be mounted later...

Page 9: ...sensitive to mounting direction 2x LDR1 2x LDR2 2 pin SIP socket Optocouplers will be mounted later Step 6 Solder ceramic capacitors Ceramic capacitors are not sensitive to mounting direction We use T...

Page 10: ...apacitors are sensitive to mounting direction Put the long pin in the hole marked with a anode on the silkscreen The opposite side is marked with cathode on the electrolytic capacitor We use Panasonic...

Page 11: ...Step 8 Solder polybox capacitors Polybox capacitors are not sensitive to mounting direction We use WIMA brand MKS2 model in the kit and pre assembled C20 220nF C24 470nF...

Page 12: ...t s easier to cut them a little more if needed than to realise they are too short Make sure the optocouplers dot match the dot bevel marking in the silk screen Be careful to bend them in the correct a...

Page 13: ...Step 11 Leave PCB2 on the side with CON1 PCB2 and CON2 PCB2 not soldered Now it s time for PCB1 Empty PCB1 top bottom...

Page 14: ...re sensitive to mounting direction make sure the stripe on the diode match the stripe on the silkscreen D4 D5 D6 D7 1N4148 Step 13 Solder small ca 3 5mm resistors Resistors are not sensitive to mounti...

Page 15: ...R17 R18 R43 R45 330K R13 R15 12K The next resistor is zero ohm Use a cut off pin from another component to form a jumper and it will do the exact same job as a zero ohm resistor R20 zero ohm...

Page 16: ...R3 R44 10K R7 R8 R9 R11 R12 100K Step 14 Solder regular sized ca 7mm resistors Resistors are not sensitive to mounting direction R23 100R...

Page 17: ...R1 R2 10R R6 1K Step 15 Solder power polarity protection diodes Diodes are sensitive to mounting direction make sure the stripe on the diode match the stripe on the silkscreen D1 D2 1N5818...

Page 18: ...IC sockets indent marking pin 1 side with the silk screens IC2 14 pin DIP socket IC will be mounted later Step 18 Solder electrolytic capacitors Electrolytic capacitors are sensitive to mounting direc...

Page 19: ...ke a longer klang tail and vice versa Step 19 Solder voltage reference diode It looks like a transistor Match the curved side with the silk screens D3 LM4040 5V Step 20 Solder transistors Match the cu...

Page 20: ...t appearence Use low profile trimmers like 3362P to not bump into the vactrols when the boards are sandwiched VR1 VR2 VR3 50K Step 22 Solder the power header Make sure the key opening is oriented in t...

Page 21: ...Step 23 Mount the spacers with the nuts on PCB1...

Page 22: ...cture below It s important that the grip is firm as there is a bit of friction in this step and we don t want the nuts to loosen If the nuts gets loose tighten them again Only one of the screws need t...

Page 23: ...rs Use a cheap plier nipper for this step save your expensive ones for other tasks Mount 1 washer and 1 nut on each potentiometer Make sure the nuts are tight Sometimes we ship the kits with Alpha pot...

Page 24: ...acks switches and LED in their positions but wait with soldering until the front panel is mounted You will need to bend the ground pins a little bit on some of the jacks The long pin of the LED goes i...

Page 25: ...o make sure the switch is aligned straight The switches have their own nuts Make sure to keep them separate from the jacks nuts as they look very similar and the switch nuts will fit on the jacks but...

Page 26: ...econance Q Turn the F A knob to fully closed counter clock wise Adjust the trimmer until sound no longer passes through 2 Trimmer VR2 Turn the F A knob to fully open clock wise Switch between VCA and...

Page 27: ...Finished module...

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