Question about Amplifiers & Preamps

1 Answer

Fuse blows on crate fxt65 amp

I got an amp from my Nephew but the fuse continues to blow every time it is turned on. I look on the circuit board for anything obviously touching...nothing

Any Ideas


Posted by on

  • jakes5505 Jan 03, 2009

    model crate FXT65 serial No (21) 07GBPB0128


  • rah1379 May 11, 2010

    can you tell me the model number on the back? is this a tube type amp or transistor? i can help you but some guitar amps have lethal voltages inside and we have to be sure what we have before i can tell you what to check and how to check it.


1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.


    An expert who has answered 1,000 questions.

  • Master
  • 1,175 Answers


It's a transistor type design. Most likely the power transistors or power amp module that drives the speakers.

If I were the repair shop I'd charge about $80.00 to fix it

Posted on Jan 02, 2009

Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

2 Answers

I shorted out the speaker wire going to sub and now the amp doesnot work

You have probably blown the internal power supply fuses in your amp or the speaker fuse in the amp. The chances of blowing your sub are slim.

The internal fuses can sometimes be hard to find. They aren't usually intended for the user to change. DO NOT replace them with higher amperage fuses if they blow after you replace them as there has been severe damage caused to the circuitry. Also, don't replace them with higher amperage fuses because you think that this will let you get more power out of the amplifier. This won't work, and you will end up blowing your expensive output devices.

Oct 05, 2014 | Amplifiers & Preamps

2 Answers

Wy fuse keeps blowing

Fuses blown when an overload occurs. More often than not caused by a short circuited transistor in the main amp section. Possibly also on the power supply too.

May 22, 2014 | AMC Multimedia CVT-2030 2-Channel...

1 Answer

PA Amplifier blows fuses

The fuse is blowing due to an overload. It's often and very likely caused by a transistor or ic that has gone short. The main culprits are the power transistors of the amp or whatever is on the big heat sink. Transistors will show the fault when you connect an ohmmeter to the terminals. It will be just like you have touched the test prods together! I don't think in your case it will be in the power supply. It's often caused by speaker cables that touch together.

Mar 18, 2014 | Radio Shack Amplifiers & Preamps

1 Answer

Konzert model AV 502A

Disconnect the speakers, all of them. If the fuse continues blowing off, you have a short circuit in the final stage of the device, called the amplification circuit. If the does not blow , then the short circuit in is one or more speakers.

Jan 18, 2014 | Amplifiers & Preamps

1 Answer

Amc amp fuse keeps blowing

Fuses blow when there's an overload. Suspect a faulty semi-conductor device somewhere.

Dec 14, 2012 | AMC Multimedia 2N100-2 2-Channel Amplifier

1 Answer

Fuse type for onkyo a-9555

The main power fuse for most amplifiers is a fast blow, 125 volt fuse for the US and a 250v fuse in countries with 220v. This unit is 125 watt so the main fuse should be 2 amps or so. The correct fuse size is written on the circuit board next to where the internal fuse was located.

Feb 23, 2012 | Onkyo A-9555 2-Channel Amplifier

1 Answer

Hello i have a marantz pm-47 amp that keeps blowing every time i plug in the power feed to the amp board i have changed the 2 caps on the board but still have the same problem i checked voltage for...

Hi mas_66,
Make sure that the fuse is the same rating with the old one.
If still symptom persist, I've suspected that your output IC is shorted.
You may hang this IC, then power up the unit.
Observe what will happen, if this cure the symptom then this is a clear indication that this IC is shorted and made the fuse blown while it is in the circuit board.
Hope I helped you.
Have a nice day!
Thanks for using Fixya.

Mar 08, 2011 | Marantz PM-68 Amplifier

1 Answer

I have Aragon 8002. I have a problem because I have no fuse. What fuse is used at 220V? Thanks, John

Have you the remains of the fuse, or was it just not in place when you got it?
The reason I ask is that the amp's fuse doesn't have much to do with the voltage of the mains supply (in your case a 250V fuse will cover it). It goes on the load in Amps or Milli-amps. Shown as A or MA. If you have the old fuse you might be able to see it on the case of the fuse. It might say 1.5A or 500ma etc. Also there are two main types of fuse, known as fast and slow blow fuses. Again if you have the old fuse the remains of a coil inside will mean it's a slow type. The other type is just a wire. However you can fit a fast blow for a slow one. If the fuse blows again it will be a fault that causes it.
If you have no fuse left at all you will either need to find someone who has the same amp and to tell you what it is, or the circuit diagram for the amp. Sometimes it's even printed on the PC board!

Feb 15, 2011 | Aragon Amplifiers & Preamps

1 Answer

Hi, I have only used my CA 740C a few times and the fuse blows, I placed another fuse in and that blew as well. Haven't a clue why this might be happening can you help please? Thanks

Looks like a electrical problem. Ensure your plug's earth is properly connected to the building earth. Amps like 640A uses sensitive circuits and the fuse will definitely blow, when there are issues, spikes or returns in the power supply.

Try shifting the amp to a different wall plug with some proper ground earth, and check it. If the fuse still blows, then the power cable in the amp may have some problems.

Hope this helps :-)

Jan 04, 2011 | Cambridge Audio Azur 640A Amplifier

1 Answer

The garget blows the fuse and goes off

if the fuse blowes when you swtich the power on its the power supply circuit. if the fuse blown after a short while that the Amp is on its possible that protection circuit is short
if you want to fix the Amp let me know


Oct 15, 2010 | Yamaha P-5000 Amplifier

Not finding what you are looking for?
Amplifiers & Preamps Logo

Related Topics:

260 people viewed this question

Ask a Question

Usually answered in minutes!

Top Amplifiers & Preamps Experts


Level 3 Expert

4590 Answers

Donald DCruz
Donald DCruz

Level 3 Expert

17129 Answers

The Knight
The Knight

Level 3 Expert

68352 Answers

Are you an Amplifier and Preamp Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides