Amp repair can be a daunting and dangerous process. While some repairs require the expertise of a professional, many common problems have quick, often free, solutions that can save you a trip to a specialist and some money.
A Word of Caution:
Always prioritise safety when dealing with amp repair and electrical equipment. Any maintenance should be performed under controlled conditions with appropriate health and safety measures in place. If you’re unsure, it’s always best to consult a specialist rather than attempt a repair yourself. Even after unplugging a device, power can remain stored within the unit, posing a potentially fatal shock risk. DO NOT PUT YOURSELF AT RISK.
When testing your equipment, make sure that you are away from other sources of electronic interference, as this may cause issue. This includes, but not limited too; WiFi routers, dimmers, florescent lights, and computers.
1. Read the Amp Repair Manual
This might seem obvious, but the best resource for troubleshooting any issue with your amplifier – whether it’s related to power, sound, or anything else – is almost always the amp’s manual. It provides the most direct, efficient, safe, and cost-effective solutions. Sometimes a “fault” is simply a setting designed for a specific purpose, like recording, or a feature added as an afterthought. You might even find that a simple firmware update is all that’s needed to address a known issue.
Often, the fix is something surprisingly simple. Remember the common engineering adage: R.T.F.M. (Read The Flipping Manual!).
2. Be Methodical with Your Signal Chain
When diagnosing any problem, from power failure to buzzing, always follow a systematic and repeatable approach. The goal is to isolate the problem within your “signal chain” (e.g., amp – pedals – patch cables – guitar).
Start by simplifying:
- Test the amp directly: Plug your Instrument directly into the amp, bypassing all pedals and other devices. If the problem disappears, you know the issue lies somewhere in your pedal board or with the cables connecting them.
- Swap cables: Try different instrument cables and IEC power cables. Faulty cables are a very common cause of buzzing, intermittent sound, or complete signal loss.
- Test with another guitar: If possible, try a different Instrument with your amp. While this article focuses on the amp, it’s a quick way to rule out the Instrument itself as the source of the problem.
By methodically swapping out components, you might discover that a simple, inexpensive cable is the culprit, saving you the expense and time of a full amp repair.
3. Check Pedal Power & Batteries
While this isn’t strictly an “amp” issue, many sound problems attributed to an amp actually originate from pedals. Many pedals can pick up hum or create noise from a cheap, unisolated power supply. Try using good quality 9-volt batteries (if your pedals support them) to power your pedals. If this reduces the noise, a better, isolated power supply might be your solution. Ensure your power supply provides the correct voltage and current for all your pedals.
If these suggestions have not resolved this issue with your equipment, it’s now advisable to seek professional assistance. We at EES Showhire are always happy to take a look and get to the bottom of any problems plaguing your amplifier and ultimately; your sound.
We offer a specalist diagnosis and repair service for all your electronics needs, with a specialisation in Amps, guitar electronics, lighting, power, and mixer repair. Click here or come into the store to get your gear repaired and sounding great again.
Sources:
https://en.wikipedia.org/wiki/RTFM
Photo by J. C. Barros from Flickr