20 Most Recent Crate TX15 15W Guitar Amplifier Questions & Answers

Your symptoms would indicate the battery is defective. When a battery fails, its internal resistance goes up and they PROBABLY use this battery in place of having a separate filter capacitor so you will get hum or buzz as a result and no charging indication.

Check your guitar with another amp, or a different guitar with this one with no effects pedals, etc, to narrow it down to just the amp. At that point, try reversing the polarity. If none of the above helps, you may indeed have a bad ground somewhere and you'll need a tech to follow it to the source.

I also have this issue. Same crate combo amp. There is a loud buzz emitted only when there is a cable plugged in. Cables and instruments checked good, only possible issue is inside the input of the amp. Popped it open, solders and connections were intact and appeared solid. Anyone have a guess as to why this is happening?

It is a very simple amplifier and the pa4a is similar.

https://www.google.com/search?q=Schematic+crate+g60xl&oq=Schematic+crate+g60xl&aqs=chrome..69i57&sourceid=chrome&ie=UTF-8

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bad output transistors.

Clean the volume and tone pots with de-oxit cleaner

remove top screws by handle.

https://www.amprepairparts.com/schematics.htm

Try with a on/off footswitch Wrong cable, or bad PCB connection switch on main tone board.

SLM sold the company years ago to Loud audio. Its only supported online now. Loudaudio.com

Power supply capacitors failed. This is a common problem with 1990's crates, also the power on "POP".

https://www.amprepairparts.com/schematics.htm Use the GX-65, its the same preamp shopwn just with 2 power amp sections

There is a short somewhere, check your wiring and solder points.

If sure that power is reaching and getting into unit, then confirm that a signal is also reaching unit. If both are positive, then your gear is FUBAR if signal is going into correct input.