How to Troubleshoot an Amp

If you prefer your music crisp and loud, you would like a good amp in your setup. Unfortunately, amps break down time to time, although they’re relatively simple to diagnose. Inspect your amp to pinpoint a number of the likely causes of the matter you’re experiencing. Wiring problems, from blown fuses to damaged wires, are the foremost common issues. If you’re employing a tube amp with a guitar, replace any bad tubes you discover . With some sharp troubleshooting, you’ll often fix an amp without ever taking it certain service.

Amplifier Troubleshooting

  • The proper working-class amplifier is shown in the below figure where a fine sine wave is generated when the input voltage is applied.
  • Let’s take 4 faulty signal output waves which are normally occurred.
  • In figure denoted as ‘a’ oscilloscope shows a dc level equal to the dc source voltage denoting that transistor is the cutoff mode.
  • The 2 main reasons for this condition are given as.
    • The PN junction of the transistor is open.
    • Resistance R4 of the circuit is open and stops current from collector and emitter.
  • In figure denoted as ‘b’ the oscilloscope shows a dc signal at collector almost equal to the voltage of emitter.
  • The main reasons for this state are given as.
    • The transistor is a short circuit with transistors.
    • Resistance R2 is an open circuit that caused transistor to be in the saturation region.
  • In 2nd condition, enough high input signal can cause saturation at the negative peak which causes short pulses at the output.
  • In figure denoted as ‘c’ oscilloscope display that an output signal which shows that the transistor is in cutoff for a small part of the input signal.
  • The 2 main reasons for this are.
    • The position of Q point has changed down due to high variations in the tolerances of resistance.
    • Resistance R1 is an open circuit biased transistor in the cutoff region.
  •  The figure denoted showed that the input wave is enough to cause a cutoff region for a small part of the signal.
  • In figure denoted as d oscilloscope show an output signal which shows that the transistor is in saturation by letting a small part of the signal.
  •  The reasons for this are.
    • Faulty value resistance has changed the position of Q-point towards saturation.
    • Resistance R2 is an open circuit that causes the transistor to be in saturation region and the input wave brought out saturation for a small part of the signal.


  • In the below figure class AB push-pull amplifier is shown the output of ac signal is also shown correspondent to an ac input signal.
  • The 2 faulty output signal is shown in the below figure.
  • The figure denoted as a show that only positive half of the input wave is exits at the output.
    • Then the first main reason is that diode Di is open. If it is error the positive half of the input wave is forward biases the diode D2 and cause transistor Q2 to operate.
    • The second possible cause is that the base-emitter junction of transistor Q2 is open so a positive half cycle of input signal exits on the output as transistor Q1 is operating.
  • The waveform shown in figure b indicates that only negative half of wave is exist at the output.

How to Troubleshoot Bluetooth Headphones

Bluetooth is an incredibly useful way to connect a range of devices to your computer. As a wireless connection, Bluetooth removes the cable-based restrictions on where you can be when using your devices. For example, you can connect your computer to the TV, move to the couch and take a Bluetooth mouse and keyboard with you. With Bluetooth headphones, you can walk around your home while remaining connected.

Having your Bluetooth headphones stop working can be really annoying, so we’ve collected a list of tips to help troubleshoot your Bluetooth headphones on PC.

Turn it off and on again

The classic advice of turning it off and on again is generally the first thing you’ll see in any troubleshooting guide because it works so often. We recommend you restart both your headphones and your computer.

Check your battery level

Obviously, your wireless headphones need batteries to run. Checking that your headphones have enough charge to connect and play music is a good step. Some headphones may have a battery level indicator or include that functionality in the official software, other devices may not have this option. If you’re not sure, try putting them on charge for a few minutes and see if that helps fix the issue.

Move closer to your computer

Most Bluetooth devices such as headphones offer a range of between 10 and 30 metres, although some can extend that to 100 metres or more. You should also be aware that walls and other objects, can reduce the range of wireless signals like Bluetooth. Try removing obstructions and moving closer to your computer to see if the connection improves or if your headphones reconnect. Your headphones may reconnect automatically, but you may have to manually reconnect them if that doesn’t work.

Disconnect and reconnect

Disconnect your headphones from the computer, then reconnect them. This includes your USB Bluetooth adaptor if you use one. Some devices will have Bluetooth built-in, which you won’t be able to unplug, but if you’re using a USB adaptor, it’s worth trying.

If just disconnecting and reconnecting your headphones doesn’t work, try taking it a step further. Unpair your headphones from the computer, then pair them again.

Update drivers

It’s possible that your device drivers for your Bluetooth controller are out of date, if this is the case, updating the driver may help resolve your issue. To do so, press the Windows key, type “Device Manager” and hit enter. In Device Manager, search for your Bluetooth adaptor driver then right-click on it and select “Update Driver”.

Unless you have already manually downloaded a newer driver, click “Search automatically for drivers” in the driver update window.

Unfortunately, you can’t manage your Bluetooth headphones this way. Some headphones may come with companion software that allows you to update the firmware for the headphones. Search the manufacturer’s website to see if such software is offered.

How to Troubleshoot an Amp

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