BYOC Leeds Fuzz User manual

BYOC Leeds Fuzz Kit Instructions
Warranty:
BYOC, LLC guarantees that your kit will be complete and that all parts and
components will arrive as described, functioning and free of defect. Soldering,
clipping, cutting, stripping, or using any of the components in any way voids this
guarantee. BYOC, LLC guarantees that the instructions for your kit will be free of
any majors errors that would cause you to permanently damage any components
in your kit, but does not guarantee that the instructions will be free of typos or
minor errors. BYOC, LLC does not warranty the completed pedal as a whole
functioning unit nor do we warranty any of the individual parts once they have
been used. If you have a component that is used, but feel it was defective prior to
you using it, we reserve the right to determine whether or not the component was
faulty upon arrival. Please direct all warranty issues to:
[email protected] This would include any missing parts issues.
Return:
BYOC, LLC accepts returns and exchanges on all products for any reason, as long as
they are unused. We do not accept partial kit returns. Returns and exchanges are for the
full purchase price less the cost of shipping and/or any promotional pricing. Return
shipping is the customer’s responsibility. This responsibility not only includes the cost of
shipping, but accountability of deliver as well. Please contact
[email protected] to receive a return authorization before mailing.
Tech Support:
BYOC, LLC makes no promises or guarantees that you will successfully complete your
kit in a satisfactory manner. Nor does BYOC, LLC promise or guarantee that you will
receive any technical support. Purchasing a product from BYOC, LLC does not entitle
you to any amount of technical support. BYOC, LLC does not promise or guarantee that
any technical support you may receive will be able to resolve any or all issues you may
be experiencing.

That being said, we will do our best to help you as much as we can. Our philosophy at
BYOC is that we will help you only as much as you are willing to help yourself. We
have a wonderful and friendly DIY discussion forum with an entire section devoted to the
technical support and modifications of BYOC kits.
www.buildyourownclone.com/board
When posting a tech support thread on the BYOC forum, please post it in the correct
lounge, and please title your thread appropriately. If everyone titles their threads
“HELP!”, then it makes it impossible for the people who are helping you to keep track of
your progress. A very brief description of your specific problem will do. It will also
make it easier to see if someone else is having or has had the same problem as you. The
question you are about to ask may already be answered. Here are a list of things that you
should include in the body of your tech support thread:
1. A detailed explanation of what the problem is. (not just, “It doesn’t work, help”)
2. Pic of the top side of your PCB.
3. Pic of the underside of your PCB.
4. Pic that clearly shows your footswitch/jack wiring and the wires going to the PCB
5. A pic that clearly shows your wiring going from the PCB to the pots and any other
switches(only if your kit has non-PC mounted pots and switches)
6. Is bypass working?
7. Does the LED come on?
8. If you answer yes to 6 and 7, what does the pedal do when it is "on"?
9. Battery or adapter.(if battery, is it good? If adapter, what type?)
Also, please only post pics that are in focus. You're only wasting both parties' time if you
post out of focus, low-res pics from your cell phone.
Revision Notes:
Rev 1.0 (current) There are no known errors in this revision.
Copyrights:
All material in this document is copyrighted 2008 by BYOC, LLC

LEEDS FUZZ KIT
INSTRUCTION INDEX
Parts Checklist……………………..............…….....page 4 - 5
Populating the Circuit Board…………...................page 6 - 12
Assembly………………………………....................page 13 - 15
Wiring the Footswitch & Jacks................................page 16 - 18
Setting up the Internal Trimpots.............................page 19
Schematic....................................................................page 20 -21

Parts Checklist for BYOC Leeds Fuzz
Resistors: 1% Metal Film (5band) / 5% Carbon Film (4 band)
2 - 470ohm (Yellow/Purple/Black/Black/Brown) / (Yellow/Purple/Brown/Gold)
1 - 1k (Brown/Black/Black/Brown/Brown) / (Brown/Black/Red/Gold)
2 - 1.8k (Brown/Grey/Black/Brown/Brown) / (Brown/Gray/Red/Gold)
1 - 3.3k (Orange/Orange/Black/Brown/Brown) / (Orange/Orange/Red/Gold)
1 - 4.7k (Yellow/Purple/Black/Brown/Brown) / (Yellow/Purple/Red/Gold)
7 - 10k (Brown/Black/Black/Red/Brown) / (Brown/Black/Orange/Gold)
1 - 15k (Brown/Green/Black/Red/Brown) / (Brown/Green/Orange/Gold)
4 - 22k (Red/red/Black/Red/Brown) / (Red/Red/Orange/Gold)
3 - 47k (Yellow/Purple/Black/Red/Brown) / (Yellow/Purple/Orange/Gold)
6 - 100k (Brown/Black/Black/Orange/Brown) / (Brown/Black/Yellow/Gold)
1 - 150k (Brown/Green/Black/Orange/Brown) / (Brown/Green/Yellow/Gold)
1 - 220k (Red/red/Black/Orange/Brown) / (Red/Red/Yellow/Gold)
1 - 470k (Yellow/Purple/Black/Orange/Brown) / (Yellow/Purple/Yellow/Gold)
Capacitors:
1 - .001µf/1n filme (1n0j)
1 - .0022µf/2n2 film (2n2j)
2 - 0.1µf/100n film (100nj)
11 - 10µf aluminum electrolytic
1 - 220µf aluminum electrolytic
Diodes:
1 - 1N4001
2 - 1N34A germanium diodes
Transistors:
6 - 2SC828, 2SC539, or 2SC356
Potentiometers: Be sure to snap off the small tab on the side of each panel mounted
pot.
2 - B50k linear (expander and balance knobs)

1 - 10k trimpot (will be labelled “103”)
Hardware:
1 - drilled enclosure w/ 4 screws
1 - byoc Leeds Fuzz circuit board
1 - SPDT PC mounted toggle switch
1 - 3PDT footswitch
2 - knobs
1 - AC adaptor jack
1 - ¼”mono jack
1 - ¼”stereo jack
1 - red LED
1 - battery snap
hook-up wire

Populating the Circuit Board
STEP 1: Add the resistors. Resistors are not polarized, so it does not matter which end
goes in which solder pad.

STEP 2: Add the diodes. The 1N4001 will be black with a silver stripe. The
Germanium diodes will be clear with a green stripe. Be sure to matched the end of the
diode with the stripe to the layout on the PCB. The stripped end should go in the square
solder pad.

STEP 3: Add the film capacitors. These are not polarized so they can be inserted into
the PCB in either direction.

STEP 4: Add the internal trimpot. Many people get confused by these because the
trimpot itself only has 3 legs, but the PCB has 5 holes. The PCB has 5 holes so that it can
accomodate a variety of different trimpot brands and models. There should only be one
way the trimpot will fit into the PCB without having to bend the legs.

STEP 5: Add the transistors. Match the flat side of the transistor to the flat side of the
layout on the PCB.

STEP 6: Add the aluminum electrolytic capacitors. These are polarized. The positive
end will have a longer lead and should go in the square solder pad. The negative end will
have a shorter lead with a black strip running down the body of the capacitor.

Step 7: Add the battery snap. Thread the solder ends of the snap through the under side
of the strain relief holes. Insert the stripped ends of the battery snap wires into the
topside of their respective solder pads. Solder on the bottom side where highlited in
yellow. Remember the red wire goes in the “+” hole and the black wire goes in the “-”
hole.

Assembly
Step 1: Mount the DC adaptor jack to the enclosure.
Step 2: Connect the TIP (negative) terminal of the DC adaptor jack to the “-” eyelet on
the PCB with 2 inches of hook up wire. Connect the SLEEVE of the DC adaptor jack to
the “+” eyelet on the far right side of the PCB with 2 inches of hook up wire. Connect
the battery disconnect terminal of the DC adaptor jack to the “+” eyelet more towards the
center of the PCB with 2” of hookup wire.

Step 3: Flip the PCB over so that the bottom or solder side is up. Insert the two B50K
potentiometers, the LED, and the toggle switch into the bottom side of the PCB. DO
NOT SOLDER!!!There are only two ways in which the toggle switch can fit into the
PCB. Either way is fine.

Step 4: Hold the PCB in one hand so that the component side of the PCB is in the palm
of your hand and the bottom side with the pots, toggle switch and LED is facing up. Now
use your other hand to guide the predrilled enclosure onto the PCB assembly so that the
pots, toggle switch and LED all go into there respective holes. Once the PCB assembly is
in place, secure it by screwing on the washers and nuts for the pots and toggle switch.
Only tighten them with your fingers. You do not want them very tight yet. Be sure to
keep your hand on the PCB so that it does not fall off the PC mounting posts of the pots
and toggle switch.
Step 5: Turn the entire pedal over so that the component side of the PCB if facing up.
Lift the PCB up off the pots and toggle switch about 2mm just to make sure that the back
of the PCB does not short out against that pots. Make sure the PCB is level and
symetrically seated inside the enclosure.
Step 6: Solder the pots, PCB, and LED. You will solder these parts on the component
side of the PCB. After you have soldered them in place, be sure to tighten up their nuts.

Wiring the footswitch, and jacks
Step 1: Install the 1/4” jacks to the enclosure. Be sure to turn the OUT jack a 1/4 turn
counter clockwise so that solder terminal for the tip does not short out against the
enclosure.

Step 2:
•Cut 4 x 3/4” pieces of wire. Strip 1/8” off each end. These will be used to connect
lugs/eyelets 1, 2, 7, & 8
•Cut 1 x 1” piece of wire. Strip 1/8” off each end. This will be used to connect
lug/eyelet 5
•Cut 1 x 1.5” peice of wire. Strip 1/8” of one end. Strip 1/2” off the other end. This
will be used to connect lug/eyelet 4. The longer stripped end will be used to jumper
lug 4 to 9.

•Cut 3 x 2” pieces of wire. Strip 1/4” off each end. These will be used to connect the
tip and sleeve of the IN jack and the tip of the OUT jack to the PCB.
•Cut 1 x 1.5” peice of wire. Strip 1/4” off each end. This will be used to connect the
ring of the IN jack to the ring eyelet on the PCB.
Step 3: Solder the wires for the footswitch.
Step 4: Remove the PCB assembly from the enclosure. Solder the open ends of the
wires that you just soldered to the footswitch to their respective eyelets on the PCB.
Load the wires in from the top and solder on the bottom side.
Step 5: Reinstall the PCB assembly to the enclosure. Install the footswitch to the
enclosure. It will have a white nylon washer and a silver metal washer. You can decide
which washer you want to be visible on the outside of the enclosure.
Step 6. Solder the jacks to the PCB.

Adjusting the Trimpot
There are rumors circulating the internet that this trimpot controls the amount of octave
effect that mixes in with the fuzz. This is somewhat true, but keep in mind that if you
used this trimpot as such, it can cause an unusual “noise gate” effect at the end of each
note on certain settings. Ideally you want to set this trimpot so that it produces the most
noise. This may seem counterintuitive, but this will produce the longest sustain and the
best sounding fuzz. This will almost always be dead center on the trimpot's rotation
(noon) or just slightly off center. But ultimately, it's up to you....just trust your ears.

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