Main PCB (The small one)

Thanks for choosing our kits! This manual is written taking with the problems that we usually find in our workshops in mind. Also the order is meant to make assembly as easy as possible. Some steps are not obvious so even if you're an experienced DIYer, read the steps completely before taking them. If this is your first project, please read this article before you start assembling the kit: www.befaco.org/howto/ May the luck be with you! Main PCB (The small one) Open Main Board Bag A RESISTORS 2 2.2 OHM Red, red, black, silver, brown R17, R18 2 47 OHM Yellow, violet, black, gold, brown R57, R65 4 470 OHM Yellow, violet, black, black, brown R35, R36, R48, R49 2 560 OHM Green, blue, black, black, brown R60, R64 4 680 OHM Blue, gray, black, black, brown R34, R38, R43, R46 2 1k Brown, black, black, brown, brown R5, R61 1 7k32 Violet, orange, red, brown, brown R41 11 10k Brown, black, black, red, brown R2, R3, R4, R10, R12, R15, R16, R20, R22, R28, R29 4 15k Brown, green, black, red, brown R39, R44, R45, R50 3 47k Yellow, violet, black, red, brown R13, R30, R37 2 56K Green, blue, black, red, brown R31, R32 1 82k Gray, red, black, red, brown R52 14 100k Brown, black, black, orange, brown R1, R21, R25, R26, R27, R40, R42, R47, R51, R53, R56, R62, R63, R67 3 120k Brown, red, black, orange, brown R7, R54, R55 2 150k Brown, green, black, orange, brown R8, R14 1 200k Red, black, black, orange, brown R59 1 220k Red, red, black, orange, brown R6 1 560K Green, Blue, Black, Orange, Brown R11 7 1M Brown, black, black, yellow, brown R9, R19, R23, R24, R33, R58, R66 DIODES Solder the diodes respecting the polarity. Black or white line on the diode must be in the same place as white line on diode symbol on PCB silkscreen. 6 1N4148 D1, D2, D3, D4, D5, D7 1 1N5231 D6 2 1N5817 (black color) D8, D9 1

FERRITE Solder the two ferrite beads passing trough a recycled resistor leg and proceed as if it were a resistor. Ferrite beads don't have polarity. The space for ferrites is a bit tight. Leave them a bit separated from the board to make them fit between power connector and diodes. Qty Name on PCB 2 FERRITE+, FERRITE- Open Main Board Bag B ICs Place the sockets taking care of the orientation and solder them on IC1, IC2, IC3, IC4 and IC5. The orientation must match the PCB's drawing. Place the five ICs on the sockets taking care of polarity. To do that the mark on front must match the mark on the socket and the PCB's silkscreen. 2 TL074/84 IC1, IC5 2 LM13700 IC3, IC4 1 TL072/82 IC5 CAPACITORS 3 47p 47 C5, C12, C17 4 100p 101 C4, C10, C16, C18 1 330p 331 C3 1 1n 1n (Polyester) C9 1 15n 15n (Polyester) C8 11 100n 104 C2, C6, C7, C11, C13, C14, C15, C19, C20, C22, C24 ELECTROLYTIC CAPACITORS Values written at the side of the capacitor. Mind polarity. Check positive terminal on board and make it match with long leg. 3 10µF 10µF C1, C21, C23 TRANSISTORS Be sure they are on proper position (same as the silkscreen on the PCB) 1 2N3904 T1 6 2N3906 T2, T3, T4, T5, T6, T7 1 BC517 Q1 1 BC516 Q2 2

TRIMMERS Solder the four100k trimmers on Offset 1, 2, 3, 4 with the screw facing out of the PCB. MALE PIN HEADERS Place and solder the tree Male Pin Headers at silkscreen side, ensuring it is 90º from PCB. Shortest side of the pins is for soldering POWER CONNECTOR Solder the power connector ensuring the position is correct: it must must be on the silkscreen side with the pins facing out. Place and solder the RCA connectors (same as the silkscreen on the PCB). RCA-OUT pcb (White conector) --> IN-Tank-Reverb (White conector) RCA-IN pcb (Red conector) --> OUT-Tank-Reverb (Red conector) Control PCB Open Control Board Bag A RESISTORS 1 180 Ohm Brown, grey, Black,Black,Brown R109 4 1k Brown, Black, Black, Brown, Brown R101, R104, R106, R114 1 2.7k Red, Purple, Black,Brown,Brown R102 3 10k Brown, Black, Black, Red, Brown R103, R108, R112 4 100k Brown,Black,Black,Orange,Brown R100, R110,R111,R113 2 1M Brown,Black,Black,Yellow,Brown R105, R107 3

DIODES Solder diodes respecting the polarity. Black line on the diode must be in the same place as white line on the diode PCB silkscreen. 1 1N4148 D100 1 1N5231 D101 ICs Place the sockets taking care of the orientation and solder them on IC100 and IC101. The orientation must match the PCB's drawing. Place the five ICs on the sockets taking care of polarity. To do that the mark on front must match the mark on the socket and the PCB's silkscreen. 1 LM3914N IC100 1 TL072/82 IC101 CAPACITORS 2 100n 104 C101, C102 1 680n 684 C100 1 10µF 10µF C103 FEMALE PIN HEADERS Place the three female pin headers and solder them ensuring it is 90º from PCB. Open Control Board Bag B FADERS Solder the faders in the side indicated by the drawing ensuring they are 90º from PCB. Qty Name on PCB 2 SPACERS Place the two spacers on the holes using his the male side and facing to the resistor's side of the PCB. Then fix with the two 3mm nuts. Front pannel components mounting tips Now we will procced to mount Jacks, potentiometers, switches and LEDs. This part of assembly is CRITICAL. Please be gentle and read carefully the instructions. These components must NEVER be soldered until they are placed and/or totally screwed to the front 4

panel. This is so because of two reasons: The height of panel components is not exactly the same. Because of this, if not screwed properly before soldering, they will not stay properly seated to the panel. This might cause mechanical torsions, reducing their life expectancy and in worst cases they will break. The second reason is that it is very difficult to hit the holes if panel is not positioned before soldering. In LEDs case they are almost impossible to place to the exact height without reference of the front panel. Open MiniJacks bag MINIJACKS Place minijacks ensuring they are by the silkscreen side but don't solder them until the front panel is on place and with all nuts screwed to it. This way it's easier to solder them on the right position. Keep in mind that the front panel holes are quite narrow and is almost impossible to place it with all the components already soldered. Caution: the switch nuts and the jack nuts looks the same but they are not and will not fit in each other's thread so don't mix them!. POTENTIOMETER Cut the little ledge on all three pots with cutting pliers as pictured: Now place potentiometers on the PCB but... don't solder them. Qty Type Name on PCB 2 Single (3pin) 100K HPF. MIX LEDs Put LEDs on place taking care of the polarity. but don't solder them until the front panel is on place. This the only way to solder them on the right position. Long Leg is the + and short is the minus. In the PCB the square hole is the minus and there is a + symbol to indicate you the right position. Qty Name on PCB 1 LED_01 Red 2 LEDs_02. 03 Yellow 4 LEDs_04, 05, 06, 07 Green 1 Duoled 5

FRONT PANEL Place the front panel moving a little the parts one by one if necessary until you fit them to the top. At this point a sharp tweezers can be helpful. Screw in the next order: Minijacks and Pots. Until all of them are flat and touching completely the panel. Then (finally) solder all of them. ; ) Place the LEDs in the panel holes making sure they are on the right level and proceed to solder them. Plug the PCB1 on the PCB2 using the pin headers and ensuring the two 3mm holes match the spacers. Screw both boards using two screws. Put the knobs on the potentiometers and the caps on the switches/faders Plug the power ribbon cable: The blue wire (negative) correspond to the pin number one of the connectors. The pin number one is indicated with a small triangle and usually with a line in your power bus. ADJUSTMENT PROCEDURE We are going to calibrate the offset of the VCAs. Like this we will avoid CV signal to leak into audio signal. To follow this procedure we will use an audio cable to connect to a sound system (not headphones) and listen how much CV signal is leaking into our audio. Then we will use trimmers to reduce this leaking to minimum. Unplug all cables from front panel. Plug power connector. Connect MIX to your sound system (Turn the volume up after connecting, as the signal is pretty low. Be careful when connecting/disconnecting, you might damage your speakers). - CV In calibration. 1-Plug an oscillator into IN 1 CV. Set Fader to max and DRY/WET pot to wet position. Turn the trimmer above TP1 until you find the setup with the minimum volume of the oscillator. 2-Plug an oscillator into IN 2 CV. Set Fader to max and DRY/WET pot to wet position. Turn the trimmer above TP2 until you find the setup with the minimum volume of the oscillator. - DRY/WET Calibration. This will be an iterative procedure between DRY and WET Positions. We will set each of them to get the minimum CV signal leaking, going back and forth until we get the best setup. Plug an oscillator in MIX CV. 1-Set DRY/WET Potentiometer to DRY position. Turn the trimmer above TP3 until you find the setup with the minimum volume of the oscillator. 2- Set DRY/WET Potentiometer to WET position. Turn the trimmer above TP4 until you find the setup with the minimum volume of the oscillator. 3- Repeat steps 1 and 2 until you get the minimum volume in both of them. 4- Move DRY/WET potentiometer to check if you get louder leaking in any position. If so, gently tweak TP3 and TP4 until you get rid of it or minimize it. Enjoy! 6