This guide covers the most common "it doesn't work" scenarios.
Step 1: The "Cold Start" Check
Is it actually on? Check that your guitar and amp volumes are up and your cables are fully plugged in.
Isolate the pedal: Remove it from your pedalboard and test it alone with just your guitar, amp, and one ~\working power supply.
Step 2: Power & Polarity
Polarity Check: Ensure you are using a center-negative 9V adapter (the standard for most pedals).
Battery Check: If using a battery, test with a brand-new one. Old batteries are a top cause of "gated" or weak sound.
Step 3: Internal Visual Inspection
Solder Joints: Look for "cold" joints (dull/grey instead of shiny) or "solder bridges" (extra solder touching two separate pins).
Component Orientation: Ensure polarized parts like Electrolytic Capacitors, Diodes, and ICs are facing the right way. Check the notch on the IC against the layout.
Shorting against the Case: If it works outside the box but dies once inside, check if any open wires or component legs are touching the metal enclosure.
Step 4: Signal Probing
If you have a multimeter, check if the DC voltage is reaching the power pins of your transistors or Op-Amps (usually ~9V).
Kit Package comes with printed table
You may download this table in PDF format as well
Kit Package comes with printed table
You may download this table in PDF format as well
Drilling template for standard 1590B (PDF)
Overdrive, Delay, Tremolo
Twin Fuzz
Chorus
© 2026 MED AMPLIFICATION, ALL RIGHTS RESERVED