There seems to be something wrong with the lead input socket on my guitar...it only seems to work (i.e. get a sound through to the amp) when the jack is wiggled around in the socket on the guitar and even then sometimes that won't stay in position so i'm having trouble getting any sound out of it at all guitar is a telecaster derryck whibbley black thanks James Belsey

Contact the manufacturer for a schematic.

check out your tubes....it sounds like one is working its way out of its socket or you have a microphonic tube...may be time to replace them and have the amp serviced while you are at it. ...Does one tube have a whitish look? inspect them/.....are there any cracks? while it is on...tap them with a lead pencil...something NOT metal...does it make a loud noise? These are all indicators there is something going on with your tubes..Good luck

regarding this fault..simply remove the pcb and fit a replacement input jack socket..you will need some basic soldering skill's or take the amp to a tech..

Need a bit more info before I would have a good idea of whats the cause. I t may be a jack, the preamp, or one of the opamp chips as examples (just to start) One of the first thing is to turn it on let it warm and simply see if all the tubes are lit. Next is to try both input channels. Plug something into the jack and play with controls. Then switch jacks and repeat. If you get no sound that means we are looking at something in the board or output end (well most likely anyway) What we are trying to do is narrow it down to a section of the board or tube or ******.

When these are working they are one of the best sounding amps. Unfortunately there are a few years where the build quality is less than perfect. My friend plays blues and I got so tired of fixing this beat I ended up taking all the parts off and using military and aerospace grade parts. Sounded better and it hasn't dared break again ;-] If this is a 90's one best advice is if you are going to a gig have a spare.

You MAY have a broken input jack. If you can hear changes from the overdrive gain control, that control is just one stage away from the input jack. Also there is a capacitor C60 that is for RF bypassing and if that shorts that will kill the audio. Yes, inout jacks get destroyed by tripping over guitar cables... that is why you run the cord through the amp handle before plugging it in. Of course verify your guitar and cable is good using another amp.

Hi.

If the amp is working, then most of the time the buzz is given by a bad grounding. Test the amp using different wall sockets, and possibly test it in a different home (there may be an earthing problem with the home network). If the problem goes away, then it was the wall socket or the home power network. If the buzzing is still there the problem is with the amp. Check the earth connection at power cord and psu and test the amplifier's PSU components. Check also the audio connections inside the amp (the back of the female jack input sockets). A small contact in there will result in a loud buzz.

If your unit has a battery, make sure you have fresh batteries. The jack ALSO serves to turn on the battery. If the jack is damaged or you use a TRS cable by mistake, the electronics will not be turned on and the sound will be very weak and distorted.

This is probably not a DIY repair. You best take it to a repair shop. Likely the power amp has failed or other common problems are broken connectors/jacks, broken volume pots, and finally circuit board cracks.

I take it you have made sure that both the cable to the distortion box from the guitar and the cable to the amp are both good. From the description you give, it sounds like there is no signal getting to the pedal. If the cable is good, then the next likely suspect would be the input jack on the fuzz box. Try wiggling it a little with the guitar cable in place to see if it is loose. Some input jacks are unbelievably cheap and flimsy. A crackling sound (static like) is almost always a bad connection. If it was the output jack, I would think that the guitar signal would come through a least a little bit, but you might want to try wiggling that one, too, if the input jack isn't the culprit.

Another possibility to check is the battery, but this doesn't seem as likely. Some effects units devour batteries, especially units that use 9V batteries. I have a multi effect pedal that kills a 9V in about an hour.