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Posted on Nov 26, 2010
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Input jack is broken - Fender Rumble 100 Bass Guitar Amplifier

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Fred Yearian

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  • Fender Master 5,603 Answers
  • Posted on Nov 27, 2010
Fred Yearian
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Joined: Jul 25, 2009
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VERY common problem... this is why you ALWAYS loop your cable through the handle. One trip over a guitar cable and the yank sideways destroys the jack... AND the jacks are really weak and poor to start with... Take the thing in for repair, or if you are electronically adept replace the jack yourself. MOST of these have the jack soldered to a circuit board and one often has to remove all the front knobs and the nuts holding the volume controls and move the bord back to remove and replace the jack...

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How to get to the input jack on a bugera 62/62 amp head.

Repairing the input jack on your Bugera 6262 amp head is a task that requires careful attention and technical expertise. If you're comfortable with electronics and have experience working with amplifiers, you can follow these general steps to access and repair the input jack. However, please note that working on high-voltage electronics can be dangerous, and if you're not confident in your abilities, it's best to seek professional assistance.
  1. Safety Precautions:
    • Disconnect the Power: Ensure that the amplifier is completely unplugged from the power source before you begin any work. This is crucial to prevent electric shock.
  2. Gather Tools:
    • You'll need a set of screwdrivers (Phillips and flat-head) appropriate for the screws used in the amplifier's casing.
    • A soldering iron and soldering supplies (solder, desoldering braid, etc.) for working on the input jack connections.
  3. Opening the Amp:
    • Remove the screws holding the amplifier's chassis in the enclosure. These screws are usually located on the rear panel or sometimes underneath the amp. Keep track of the screws and their locations.
  4. Accessing the Input Jack:
    • Once the chassis is removed from the enclosure, you should have access to the internal components of the amplifier. Look for the input jack and its connections on the PCB (printed circuit board).
  5. Repairing the Input Jack:
    • Carefully examine the input jack's connections. If you see any loose or broken solder joints, you'll need to re-solder them. Use a soldering iron to heat the solder joint and apply a small amount of new solder if necessary.
  6. Testing and Reassembly:
    • After repairing the input jack connections, it's a good idea to test the amp's functionality before fully reassembling it. Plug in your instrument and ensure that the input jack is working as expected.
  7. Reassembling the Amp:
    • Once you've confirmed that the input jack is functioning properly, carefully reassemble the amplifier. Make sure to secure all screws and components properly.
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Some keyboards use the amp output sockets for headphone use.
You might need some adapters for your headphones.
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Yes, the jack MAY actually be broken. It will need to be serviced. Run cables through the handle to avoid plugs from being yanked sideways and breaking the jacks.
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Hello. I have a Boss MT-2 distortion pedal. It will not power up with the adapter or battery. Wondering what could be wrong. Any suggestions on what to look for? Thank you!

The battery is connected via plugging in the input guitar cable ( a seperate contact is made at the jack). Sometimes this can be broken. Usually this failure is caused by someone stepping on or yanking a cable and the solder is broken at the jack/board attachment. This can be the input jack OR the power jack. Occasionally the circuit board or the traces on it are cracked, requiring jumpers to be installed on the board. In any case, open the pedal and look for these problems.
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Hi :) I have a problem with my Boss mt-2 pedal. Whenever I insert the jack plug in the input, the adapter switches off automatically. The pedal works fine with battery and no problem is created. This only...

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Same thing... they probably broke both jacks. Sometimes the guts of the jack is broken and it doesn't appear to be broken but is broken internally. You may find broken solder on the pins to these jacks as well.

Note that the two input jacks have a different gain.

Here is schematic: http://elektrotanya.com/peavey_valveking_100_212.pdf/download.html
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External problems are guitar and cable problems.
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The center pin is your tip..which should have a wire going from 1/4" jack to the XLR jack. Pin 1 is earth ground...should be coming from 1/4" jack sleeve. Pin 3 would come from the 1/4" jack ring.
http://upload.wikimedia.org/wikipedia/commons/thumb/8/81/XLR_pinouts.svg/540px-XLR_pinouts.svg.png

If you are still having trouble, post links to pictures of the internals of the guitar showing the assembly.
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