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E.S.V. Fuzz Kit Instructions
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Mounting the Circuit Board.....................................page 9 - 12
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Schematic..................................................................page 16
Troubleshooting........................................................page 17 - 24
Copyright 2008 Build Your Own Clone
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Summary of Contents for BYOC E.S.V. Fuzz
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Page 1: Table Of Contents
E.S.V. Fuzz Kit Instructions Parts Checklist ....page 2 Populating the Circuit Board ....page 3 - 7 Assembly .....page 8 Mounting the Circuit Board........page 9 - 12 Wiring ......page 13 Orienting the Transistors/Finish up ..page 14 - 15 Schematic..............page 16... -
Page 2: Parts Checklist
Parts Checklist for Ultimate Fuzz Kit Resistors: 1 - 470ohm (yellow/purple/brown/gold) 1 - 4.7k (yellow/purple/red/gold) 1 - 33k (orange/orange/orange/gold) 1 - 100k (brown/black/yellow/gold) 1 - 1M (brown/black/green/gold) Trimpot: 1 - 25k trimmer Capacitors: 1 - 0.1uf film (flat yellow) 1 - 2.2uf aluminum electrolytic 1 - 22uf aluminum electrolytic Transistors: 2 - AC127/01 NPN germanium transistors... -
Page 3: Populating The Circuit Board
Populating the Circuit Board Step 1: Add all the resistors. Resistors are not polarized and can be inserted in either direction. - Page 4 Step 2: Add the transistor sockets. Make sure that the tab on the socket matches up with the tab on the circuit board. Do not add the transistors yet. Do not solder the transistors to anything. Only solder the sockets.
- Page 5 Step 3: Add the bias trimpot. The board is designed to accept several brands of trimmers, but there is only one way to insert the trimpot that comes with the kit. Directions for setting the trimpot are in the finishing touches portion of the directions.
- Page 6 Step 4: Add the .1uf film capacitor. This is non-polarized so it can go in either direction.
- Page 7 Step 5: Add the aluminum electrolyic capacitors. These are polarized, meaning there is a positive and negative end. The positive end will go into the square solder pad. The positive end of the capacitor will have and indented collar around it.
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Page 8: Assembly
Assembly 1. Install the jacks first. If you are looking down inside the enclosure, the mono jack goes on the right side and the stereo jack goes on the left. Place the washer on the outside of the enclosure. Use a 1/2" wrench to tighten. 2. -
Page 9: Mounting The Circuit Board
Mounting the Circuit Board PC Mounted Potentiometers: Some kits will come with PC mounted pots depending upon availability. If your kit has PC mounted pots follow these steps for mounting the circuit board. Step1: Understand that the LED, and both potentiometers will be mounted directly to the underside of the PCB. - Page 10 Step 3: Now mount the PCB with LED onto the leads of the potentiometers. This move may take a little finess. It's best to leave your pots somewhat losely mounted to the enclosure so that you can easily move them to line up with the eyelets on the PCB. You may need to bend the leads of the pots into place if they were bent in shipping.
- Page 11 Step 6: Solder the LED and pots on the top side of the PCB. Clip the excess LED leads. Do not clip the leads of the pots. Solder Lugged Pots: Some kits may come with panel mounted pots with solder lug termination. If your kit has these style pots, follow these steps for mounting the PCB.
- Page 12 square pad. Bend the leads of the LED outward on the topside of the PCB so that it does not fall out when you flip it over. Step 4: Now remove the paper backings from the standoffs and adhere them to the backs of the pots.
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Page 13: Wiring
Wiring... -
Page 14: Orienting The Transistors/Finish Up
Finishing Touches Step 1: Install the transistors Install the transistors. Do not solder the transistors. Simply push the lead wires into the appropriate socket holes. The transistor socket hole with the tab next to it will be the... - Page 15 emitter. The lead wires on the germanium transistors will be rather longs, so you will want to clip off the excess. But be sure to leave enough so you can bend the transistor down and out of the way when you seal the enclosure. But do not clip the transistor leads untill you have tested your pedal and know that they work.
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Page 17: Troubleshooting
Checking your wiring... - Page 18 1. NO POWER: If you have a completely dead pedal and your LED will not light up, this is usually a good sign that you are not getting power to the circuit. First you need to make sure that you are using a fresh battery or good power supply. Also make sure you have a plug in the IN jack.
- Page 19 3. BYPASS WORKS, BUT THE EFFECT DOES NOT: This could be any number of problems located on the PBC, but let's check your offboard wiring first and make sure that you are getting signal to and from the PCB to rule that problem out.
- Page 20 1. Check all ground connections. Set your DMM to test for continuity. Touch one probe to the sleeve of either jack and touch the other probe to the various BLACK test locations on the PCB. Your DMM should make a buzzing sound.
- Page 21 2. Check all Positive Voltage connections. Set your DMM to test for 9VDC. Touch the black probe to the sleeve of either jack. Touch the red probe to the various RED test locations on the PCB. You should get +9V or exactly the same as what ever you power supply is measuring.
- Page 22 4. Test the audio signal path. Do this using a Signal Test Probe. If the audio signal stops at BLUE8, then you likely have a problem with Q1. If it stops at Blue11, you likely have a problem at Q2. You should notice a large volume boost at BLUE9 and deminished volume at BLUE 6 - 8 when compared to BLUE1 - 5.
- Page 23 4.5v - 5.5v. But optimal tone may be anywhere between 3.5v and 6.5v. If you cannot get your voltage within this range by adjusting the trimpot you have a problem somewhere. ©2008 byoc, LLC Installing the Test Transistor...
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