RYO PCB1 1.0 User manual

Ljunggren Audio
Roll Your Own
Aperture
Version: Aperture PCB1: 1.0, PCB2: 1.0 & 1.1
The only difference between PCB2 1.0 & 1.1 is a short missing trace in 1.0 that is very easy to
fix and is included in the assembly instrucions.
Bills O Material
Type Qty Value Parts Description
Pow er header 1 2x5pin POWER Euro pow er connector
Socket strip 2 1x8pin CON1-PCB1 CON2-PCB1
Pin strip 2 1x8pin CON1-PCB2 CON2-PCB2
Potentiometer 1 B22K POT1 9mm vertical mount
Potentiometer 2 B100K POT2 POT3 9mm vertical mount
Potentiometer 1 A100K POT4 9mm vertical mount
Jack 4 3.5mm J1 J2 J3 J4 PJ301M-12 / Thonkiconn / Inline
Toggle sw itch 1 SPDT on-off-on SW1
Toggle sw itch 1 SPDT on-on SW2
LED 3mm 1 orange D8
Diode 4 1N4148 D4 D5 D6 D7 General purpose.
Diode 2 1N5818 D1 D2
3.5mm resistor 1 680K R16 1% Tolerance
3.5mm resistor 4 68K R4 R5 R22 R34 1% Tolerance
3.5mm resistor 5 47K R14 R19 R21 R24 R30 1% Tolerance
3.5mm resistor 1 4.7M R28
3.5mm resistor 5 330K R17 R18 R31 R43 R45 1% Tolerance
3.5mm resistor 3 12K R13 R15 R25 1% Tolerance
3.5mm resistor 1 0R R20 Zero ohm/Jumper
3.5mm resistor 5 10K R3 R27 R29 R40 R44 1% Tolerance
3.5mm resistor 10 100K 1% Tolerance
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 C0G 1 68nF C19 2.5-2.54mm pin pitch TDK recommended
Electrolytic 4 10uF C3 C4 C17 C18 2mm pin pitch 5mm dia max 10mm height. Min 25V.
Electrolytic 1 2.2uF C25 2mm pin pitch 4-5mm dia max 10mm height. Min 16V.
Film cap 1 220nF C20 5mm pin pitch WIMA MKS2 recommended
Film cap 1 470nF C24 5mm pin pitch WIMA MKS2 recommended
Trimmer 3 50K VR1 VR2 VR3
Transistor 3 BC547 Q1 Q2 Q3
Voltage reference 1 LM4040 5V D3
IC socket 1 DIP16 IC1 16 pin DIP
Sw itch IC 1 DG412DJ IC1 16 pin
IC socket 1 DIP14 IC2 14 pin DIP
OpAmp 1 LM324 IC2
IC socket 3 DIP8 IC3 IC4 IC5 8 pin DIP
OpAmp 3 TL072 IC3 IC4 IC5 8 pin
Vactrol socket 4 SIP2 LDR1 LDR2 2 pin SIP
Vactrol 2 NSL-32 SR3 LDR1 LDR2 Advanced Photonix/Silonex
Pow er cable 1 16pin-10pin
Mounting screw s 2 M3x6 black
Frontplate 1 2mm black PCB material
PCB1 1
PCB2 1
spacers 2 11mm
nuts 2 for spacers
screw s 2 for spacers
Knob 3 small cream
Knob 1 big red
Schottky rectifier. Pow er polarity protection. Alternatives: 1N5817
1N5819 SB130.
R7 R8 R9 R10 R11 R12 R32 R33
R37 R38
C1 C2 C5 C6 C7 C8 C9 C10 C11
C12 C13 C14 C15 C16
14 pin Alternative: TL064 Alternatives w ith higher current
consumption: TL074 TL084

Assembly instructions
e start with PCB2.
Empty PCB2 top & bottom.

Step 1
Solder small (ca 3.5mm) resistors. Resistors are not sensitive to mounting direction.
R16 680K
R22, R34 68K

R30 47K
R28 4.7M

R31 330K
R25 12K

R27, R29, R40 10K
R10, R32, R33, R37, R38 100K
If you have PCB2 version 1.0 you need to
save one of the resistor pins. Use it 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 but won't ruin anything if you
happen to do it anyway by misstake. This is the
only difference between the PCB2 versions.

Step 2
Solder regular sized (ca 7mm) resistors. Resistors 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 capacitors will follow in a later step as they are taller.

Step 4
Solder IC sockets. Match the IC sockets indent (marking pin 1 side) with the silk screens.
IC3,
IC4,
IC5 8 pin DIP sock ts. IC's will b mount d lat r.
IC1 16 pin DIP sock t. IC will b mount d lat r.

Step 4
Solder vactrol/optocoupler sockets. Not sensitive to mounting direction.
2x LDR1, 2x LDR2 2 pin SIP sock t. Optocoupl rs will b mount d lat r.
Step 6
Solder ceramic capacitors. Ceramic capacitors are not sensitive to mounting direction. e use
TDK brand in the kit and pre-assembled.
C21 33nF

C19 68nF
Step 7
Solder electrolytic capacitors. Electrolytic capacitors 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. e use Panasonic brand in the kits and
pre-assembled.
C17, C18 10µF AC coupling

Step 8
Solder polybox capacitors. Polybox capacitors are not sensitive to mounting direction. e use
IMA brand MKS2 model in the kit and pre-assembled.
C20 220nF
C24 470nF

Step 9
Insert the ICs in the sockets.
IC1 DG412
IC3,
IC4,
IC5 TL072
Step 10
Insert the vactrols/optocouplers in the sockets. This is a fiddly step, be careful not to cut the
pins too short, it'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 care ul to
bend them in the correct angle in relation to the dot on the side. If you need to re-bend
them in the opposite direction there is a little risk of the pins to break. It's easiest to bend the
pins with some pliers.

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.

Step 12
Solder small signal diodes. Diodes are 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 mounting direction.
R4, R5 68K
R14, R19, R21, R24 47K

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

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

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

Step 16
Solder ceramic capacitors. Ceramic capacitors are not sensitive to mounting direction.
C1, C2, C5, C6, C9, C10 100nF
Step 17
Solder IC sockets. Match the IC sockets indent (marking pin 1 side) with the silk screens.
IC2 14 pin DIP sock t. IC will b mount d lat r.
Step 18
Solder electrolytic capacitors. Electrolytic capacitors 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.
C3, C4 10µF

C25 2.2µF Klang d cay capacitor, incr as to mak a long r klang tail and vic v rsa.
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 curved side with the silk screens.
Q1, Q2, Q3 BC547

Step 21
Turn PCB1 over and solder trimmers. Only 3 of the 5 holes are used for each trimmer, the
extra 2 holes are for fitting trimmers with different 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 the same way as in the
picture below. It's easier to avoid bent pins if you attach the power cable in the header while
you are soldering.
POWER 2x5pin