Effective guide to inspect and repair amplifiers

The complexity of an amplifier repair usually depends on malfunctioning parts and their location in the unit. Many things can go wrong with your amplifier, but common problems will likely affect all brands and models. Before you learn how to repair amplifiers, you must know yourself to show the wealth of information about its operations. You can read more details on identifying an amplifier problem and how you need to fix it. You may also get to know how to disassemble, inspect, and clean an amplifier. 

What is an amplifier? 


An amplifier is an electronic device that magnifies and controls output audio signal sources from audio home entertainment devices like an external CD player and tape player or a built-in AM-FM receiver. The output signal is normally fed to audio speakers. The main components include a speaker, power amp and preamp.


How to fix an amplifier

Fixing an amplifier is similar to fixing many other appliances because they are assembled with similar components. Some of the basic components include cords, which may fail to deliver electricity, fuses needing replacement, and switches and controllers that may cause problems.

What you will need?

Some of the fundamental tools you need to pick for fixing an amplifier includes:

Soldering iron and solder:

According to most professional reviews, the Anbes Soldering Iron Kit may be the most dedicated soldering kit in versatility and durability. This kit has a wide span of uses and is highly portable.

Screwdrivers:

The Electronic Cleaner is one of the most favored electronic contact cleaners, and it gets all the rave from users because it is quick-drying, plastic safe and leaves no residue. It also helps in the prevention of communication failure.

Repairing an amplifier: step-by-step

Step 1

For amplifier repair, turn down the volume to zero and switch off the amplifier until it cool down.

Step 2

Turn the amplifier on, and once you find the LED that indicates 'ON' lights up, it means there is no problem with the power supply. But you try to operate it usually by turning up the volume. If you get any sound, but it is too low or of poor quality, then it means the amplifier is working but not to its optimum level. If no sound is produced, a part of it is likely broken. A loose connection could cause this.

Step 3

To screw the amplifier's back panel, you may use a screwdriver and remove the chassis to reveal the circuit board. Check for prominent signs of damage like a blown fuse or transistor. You may know a fuse or transistor is blown when you see a brown discoloration. If that is the case, replace either part with a matching part.

Step 4

You may verify if there are any loosely interconnected wire joints. You can do this by outlining the circuit wiring from input and gently pulling on the wire. If you find the wiring is slack, there is a loose connection. By melting the loose wire joints and soldering, you may also have the option to re-establish the connection.

Step 5

The circuit is usually shorted when you find one of the parts comes away from the circuit. Also, when a resistor stops controlling the current, the whole circuit fails. You can check out the printed circuit board and be on the look for loose-fitting capacitors and resistors.

Step 6

Once you set the meter to 'resistance', switch on the amplifier. Grab a voltmeter probe and place it directly after the first resistor in the signal chain to test if it is performing properly. The voltmeter should show you a reading within 5 percent of the value. If it reads zero, then the resistor is fully shorted. If you get anything beyond this variance, then the resistor is malfunctioning.

Step 7

You may turn off the amplifier and replace it if the resistor is shorted. Remove the resistor by detaching the solder joint on the solder's circuit board base in an identical replacement.

Step 8


The final step is to test the output transformer. Use a screwdriver to unscrew the transformer's housing so that you can reveal the primary winding, and the attached meter leads to the winding inside the transformer, and then turn the amplifier on. You should get a reading almost equal to the power handling detailed in your user manual. If you find the meter reads zero, the transformer coil is shorted. An extremely high reading means the transformer is leaking. In these two cases, you need to replace the transformer.



Bottom Line:


It is important to know about amplifier repair and troubleshooting tips before you learn how to repair an amplifier. You must understand a stage or fender amplifier's build and operation. If you are not up to fixing your amp yourself, you can always seek assistance from your manufacturer's customer care or a professional. 


Disclaimer: This is a generic Information & post; content about the services can be changed from time to time as per your requirements and contract. To get the latest and updated information, contact us today or visit our website.

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