When the amp is switched on and my guitar plugged in, there is no output noise either through the speaker or the headphone socket, though the On button glows red as usual. When I switch the amp off, there is about one second of amplified noise (such as a chosen guitar chord), then silence.
Has a component, such as the off/on switch, failed?
First off, if this is a tube amp, make sure the switch that says "standby" is flipped to the ON position. It is a no brainer, but you have no idea how many times i have come across people saying they cant get their amp to work and they have it on standby. If it is a tube amp, and you have both switches in the on position, then it could be any combinations of faulty tubes or just one faulty tube. If the amp is fairly new, contact the manufacturer and see if you can get some replacement tubes (i had a problem with my B52 AT100 head and i contacted B52 and they sent me a whole set of new tubes at no cost). After you replace and/or test tubes, if the problem still persists, there is something wrong with the wiring and it will need to be professionally repaired.
If your amp is not tube, then skip all that i said and skip right to the part about it being professionall repaired.
It could also be somethign as simple as you have a bad guitar cord, your guitar being bad, or both. Hope this helps.
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Re: Amp Problem with my Guitar
You suspect the power switch when you should have immediately dismissed it because the ON light is on, as it should be. The fact that it does in fact produce sound at all indicated that the amp is being powered on. There is a malfunction somewhere else in the amp, most likely a bad tube. If you have access to a tube tester, then by all means, have the tubes checked. You could check your guitar and cord with another amp to make sure that they are working OK. Beyond those simple things, it's my opinion that for you to open this amp and attempt repair, you would risk further damage.
it would be much cheaper and quicker for you to take the amp to a
qualified repair shop and pay the price for a competent repair.
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It is a definite pickup grounding issue causing hum/"buzz" which diminishes when touching strings. Check the impedance of cable jack inputs and cable which should be 1/4"mono input/output jacks) . A personal preference but effective is to NOT run guitar direct into mixer but through an external amp w/ a headphone out jack . Noise gating/preamp filter also will help eliminate the "buzz"/noise from pickups. It is unfortunately the nature of the "electro-magnetic" beast when it comes to electric guitar pickups .Hope this helps.
This is a VERY low level output designed for headphones and will not drive a cab directly, you'll need an amp, take it to line in of an amp and all should be fine (REMEMBER This is designed to drive stereo headphones so is a TRS Right,Left,Screen. If you plug it into a mono input you will probably be shorting out one side of the peavey's output so get a splitter.
There is a small chance it "could" but more likely you would just overdrive the input stage to clipping.
You can try it- you need to keep the viltage input to the amp at 1 volt peak to peak or less, or you run the risk of clipping. You should use shielded cable, as you may also pick up other noise along that cable.
Do the cables have the right length plug/jack ends? There are 5 different lengths in use. Some will short the inputs completely.
Do you get noise floor from the amp when turned full volume? if so, it is an input/mute issue. The switches these days are rather cheaply made and prone to dirt or corrosion. Try cycling the switches repeatedly. The same with the jacks.
If there is no warranty left- pull the chassis out and under a regular flourescent light, noise test each part of the amp with an insulated screwdriver- just make a contact on discrete transistors, or on the inputs of the IC's and work back towards the input. If it is clean all the way back-it has to be the cable, cable ends or the guitar.
i) Disconnect one lead of loudspeaker & insert an open-ended guitar cable into headphone socket.
ii) Put a dc voltmeter across open end jack then turn Frontman ON for a few seconds.
iii) The reading should be about 0volts - if the voltage is high (27v), then it is likely that the PA chip TDA1514A has blown.
iv) If,however, the voltage is correct in iii) , then reconnect speaker & put guitar cable into the POWER AMP IN socket & connect other end to guitar...Turn on briefly, if there is still hum then fault is in the output stages & will require chassis removal to solve.
Make sure you have the correct power adapter, not a substitute. Make sure your guitar is outputing enough... You LIKELY will need a guitar that has a preamp in the guitar, (not a passive pickup guitar). This device is nothing more than a small amp that drives a speaker which the sound travels up the hose. If your guitar creates a buzzing noise, then this device will do that too... Plug a set of headphones directely into your guitar to verify the sound is clean... NOTE, only one side of headphone will have guitar in it if the headphones are stereo type.
Have you tried another cable between amp and guitar? Usually the cable goes bad first. Have you tried another amp or possibly tried another guitar on your rig? If this still indicates that your guitar's Standard 1/4" TS Jack is noisy, remove the oval cover over the jack and check the solder joints for the wiring. Follow the wires back to the tone and volume pots and check those solder joints. If everything is secure...Plug in, power up and check for noise while turning the volume pots stop to stop. If the pots make a scratching noise, shut down rig and unplug the guitar. Get a can of spray contact cleaner with a small extension tube (available at electronic shops) to spray in the pots while turning them. (May have to remove pots fom the guitar to get at small openings on side of pot can.) Spray jack and test for noise. Jack STILL
noisy...If you can solder...unwire old jack, remove from guitar, take to electronic shop, match to Standard 1/4" TS Jack, install in guitar, resolder wire connections and test. If you cannot solder...take guitar to
a reputable shop or dealer that does this repair. Good Luck! P.S. The
spray contact cleaner can be used on the amp jack, pots and switches
too...just make sure the amp is unplugged from the power supply before
doing any spraying.
Here is the manual if you don't have one:http://www.tascam.com/details;9,21,23,19.html Make sure your guitar cord is working. Make sure your are plugged into the Guitar/Mike input jack.Do not connect a guitar amp to this jack via line out on the amp or otherwise. Set the Guitar/Mike switch to Guitar. Use the Input control to adjust the level of the input.Adjust your Headphone level using the Output control.Carefully read pages 12, 13, 14 and 15 of the manual.There are various combinations of controls that would make your guitar too quiet to be heard. Example: Mix Balance page 24. Let me know if this helps.
Make sure the "ground lift" option is used on the direct box.
DO NOT UNDER ANY CIRCUMSTANCES use a headphone output jack as the output of this unit. The headphone jack is for HEADPHONES that have no return to ground. Use of this as drive to a sound board is sure to cause problems and in some cases can fry these amps due to the circuitry.
The cable used to go to the direct box should be very short and high quality.
You should source the power for this unit from the SAME source and receptacle as your sound board if at all possible.
There are some possibilities. One, your speaker may be blown or disconnected. Make sure the wiring is still connected to the speaker and if you have one, try measuring the resistance(impedance) of the speaker with a volt ohm meter.Do this unplugged from current and disconnect one of the wires from the speaker or you will get a reading from the output stage. Two if there is a heaphone or line out jack it may have become faulty. If you have sound with the headphones plugged in your amp is still producing sound. Some jacks are designed to interrupt the signal to the speakers allowing you to practice without bothering anyone. If your amp has that feature and you still have sound with the headphones and your speaker tests OK then your problem is the jack. Hope this helps.