Dual Powered Nashville 400..Help Mike

Jim Eller · From: Kodak, TN (Michigan transplant)

My Nashville 400 has developed a dual power system.

I can be playing along at what would be a normal volume and then all of a sudden the power almost doubles (like it should have been in the first place). It also works the other way. It only happens once or twice over a three hour period.

If I give it the ol' tap on the top fix it method it goes into a crackling and buzzing mode. It almost appears as though something is loose (other than me).

Any quick suggestions before I have to go through the expensive shipping process?

Thanks,
Jim Eller
Kodak, TN

865/712/8111

Curt Langston · Posted 6 Nov 2005 11:02 am

Jim, it sounds like dirty pots. Try pulling the chassis and spraying them all with contact cleaner. You can buy a can from Radio Shack. Of course, be sure to unplug the unit first.

Jerry Erickson · From: Atlanta,IL 61723

Could be dirty pots or possibly a bad solder joint on the circuit board. Another thing to try would be to insert a cable in the effects loop jacks in the back of the amp next time this happens. These jacks get dust and dirt in them over the years and do need to be replaced. If you're going to send it back to Peavey, just send them the chassis. That'll make your shipping much more reasonable.

Jack Stoner · From: Kansas City, MO

Could be a pot, could be either the Power Amp in jack or the effects loop return jack as they both have an extra contact for the "normal through" on the tip.

However, it sounds more like a dirty molex connector internally in the amp. If you have one of the older Nashville 400's that has a molex connector on the speaker output, that is also a potential area and later model 400's came with the speaker wires permanently soldered to the molex pins (and Peavey recommends soldering the wires on the older ones that have the Molex connector).

Lee Warren · From: Nashville, Tennessee, USA

I had a similar problem years ago -- with mine, the problem was the pins on the circuit board that the molex speaker connector fits onto.
There were hairline fractures around the base of those pins.
Once touched up with solder, the problem was fixed.
Lee
p.s. it's the same problem I've encountered several times with input jacks on Boss Tu12h tuners (hairline fractures where the socket is mounted to the circuit board)

Mike Brown · From: Meridian, Mississippi USA

Jim, it looks like these Forumites have provided good suggestions here. Contact me with your amplifier and steel hooked up and I will assist in narrowing down the "symptom". My number is 1-877-732-8391, ext. 1180.

Thanks,
Mike Brown
Peavey Electronics Corporation

Jim Eller · From: Kodak, TN (Michigan transplant)

I knew you guys could handle it. I will look at all of the above. If nothing works,.......stand by Mike.

This is a great place with great people.

Thanks to all,
Jim

Forum Index > Electronics		Next oldest topic :: Next newest topic

All times are GMT - 8 Hours	Jump to: