Peavey xr600b clipping

[Enzo]

Are you sure you installed the chip facing the right way?

Every IC chip has either a round dot by one corner, OR a sort of notch in one end.

Look at the 14 pin IC. Near one end is a four pin Molex connector. The notch or dot is at the oppopsite end of the IC, right?

The small IC must have the dot or notch at the same end. In other words, the small IC has near one end, the Molex connector in the corner that goes to the front panel. The IC must have its dot or notch at the oppopsite end of it.

WHich way the printing goes is irrelevant.

Either you got a bad IC, or you installed it backwards, or PV crossed it wrong and sent the wrong type.

If the limiter circuit was bad, any correct IC you installed would act the same way. Begore you had no output from the amp, now you get a loud noise. It didn't make that noise before, so the circuit is still OK.

[Kip H]

I was pretty sure I installed it correctly but I went back to double check. Still humming. I even put the old one back in and the original problem without the hum surfaced. The invoice and the number on the chip bag were correct so I called Peavey to check the number printed on the chip..BA4560....UH OH the tech says that chip won't work! Waiting for the right chip.

[Enzo]

No, a 4560 is just an op amp, and it won't work. Use the amp without the chip until it comes.

[dentsinger]

New issue with XR600b

Reading this has given much insight to the possibilities of my problem with the same amp. The difference being, mine powers up, but no sound comes out at all. The power light comes on, then a second later the compression light comes on. Now I don't have it in front of me to try all the troubleshooting suggestions, and even worse I don't have speaker cabs anymore to get sound anyway. I just know, the last time I had speaker cabs, there was no sound.

I figured I'd write since sometimes, certain criteria of the problem will give the 'ah-hah' needed to go in the right direction. I'm teetering between selling as is, or using it for scrap parts for guitar pedals and whatnot, but not if it's as easy as replacing the limiter chip.

THANKS

[Enzo]

Hi dent, welcome to the forum.

May I suggest starting a new thread for your amp, you'll get better response than tacking onto the end of a thread that has been dormant for a year.