20 Most Recent Fender Sp-10 Electric Guitar Amp 10 Watt Questions & Answers

Call your local stereo store. These items are very standardized.There are 2 standard sizes for headphones. the one for PCs and phones is the smaller size. An amp or receiver probably take the next size up. If you screw up and get the wrong size someone like Radio Shack or the like will have an adapter that sells for a buck or 2.

If you have power and a good connection to the guitar, don't take it apart - take it back. It has a warranty and any reputable dealer will give you another one - just ask for a test before leaving the store/shop.

change the plugs on the chords.or both.they loose their resistance.good luck.

What happens when you replace the original resistor? The change might eradicate the balance within the circuitry. It might be appropriate to connect a wire wound variable rersistor of say 10K in series with the original resistor to see what changes occur with small changes. Measure other known voltage points around that part of the circuit and note the changes as you increase the resistance. It would be helpful if you could send a diagram of this particular unit.

This is normal

You will need to isolate the fault to a particular stage. The two large valves are the power output valves and operate in push/pull mode. The next stage is the phase splitter and driver stage. The next stage is the tone control and compensation. The first stage is the pre amplifier stage. To eliminate the output and drive stage you will need to inject a signal at the top end of the master volume control. Touching this point wth a screw driver will inject enough hum to give a strong buzz from the speaker, if this is the case then fault is in pre amp of tone circuity if not. Check screen feed resistors for open circuit (wire wound resistors to screen pins of output valves). Check resistors to anode and cathode pins of phase splitter for increase in value. If the output stage seems ok then isolate the fault further by touching the screw drive to the grid of the valve in the tone network and then the pre amp valve. The buzz will get louder as you progress if the stage is working ok. If not check anode voltages and resistors. WARNING. dangerous high voltages exist in the circuits. Only ever use one hand when making contact tests, keep the other one in your pocket. If you feel this help is beyond you then please seek professional help. All the very best from Vintie

Check the back panel or underneath

Hi,here is a link that I hope will help you,as you do not give a model number:-
http://www.schematicheaven.com/fender.htm

If you need more assistance, please ask.

Regards - Anthony

Hi,

Seems that there are some harmonic distortions.
You can try to swap some tubes (12AX7), there could be just one tube who's messes up your sound.
If there isn't any change off this distortion, you must visit a technician.

Good luck,
Gerard

Have fixed this before. It is a power supply problem. Pro Line Music 215-736-8055

1st thing to check is the tubes that run those circuits

A good amp shop will have access to a tube tester.

Secondary issue might be one of the power supply lines has quit and you'll need a tech for that.


please rate my help if this helps....Thanks

I used to have a princeton amp, I believe the tubes pull straight out.

if everything still sounds ok, the bulb is probably just getting old. there are many places on the web to order replacement parts without having to pay big money for repairs at the big stores.