Question about Music
Posted by Anonymous on
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Posted on Jan 02, 2017
As an electronics tech for 40 years I have spent half of those years reparing the damage done to electronic equipment by WD40. It is a great product when used in the correct situation. When it comes to cleaning controls in amplifiers etc the correct procedure is to apply a contact cleaner to flush out any dirt then apply a contact lubricant. WD40 contains minute graphite particles as well as corrosive chemicals. Between the two they swiftly render the controls to the bin.
WD40 great for unlocking rusty screws etc but never use it in electronic gear.
Posted on Jun 01, 2010
Buzzing could be normal for this amp, especially if you have the gain cranked way up (or the volume way up) see if the buzz goes away when you turn the gain/volume down. If not, there is a problem that needs to be properly diagnosed by the amp tech at your local music store. The crackling is also unfortunately rather normal for an amp that's a little older. Oxidation builds up inside the knobs and makes that noise as you turn them. If it only happens when you change settings I wouldn't worry about it, but if it gets bad, a tech guy can clean it out for you.
Posted on Mar 05, 2011
If just no effects, look for a loose ribbon wire. Check footswitch and make sure the plug and jack are fully mated.
It is possible you have a defective 4558 IC, about the only way to locate the problem IC or transistor quickly is to "buzz test" the circuit. You may need to have an audio input of some sort pugged in as well to get the effects to respond. Expose the bottom of the chassis, and with a screwdriver begining at the output, work your way back through the stages/ICs until you lose the signal. Since you seem to indicate it is at the effects, begiin where they end.
Also make sure the solder connections are sound.
Pin 3 and pin 5 are the positive/noninverting inputs to the 4558 series of IC.
Posted on Jan 27, 2012
Testimonial: "thanks very much...chris"
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