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Topic: Nashville 400 problem |
Billy Henderson
From:
Portland, AR, USA
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Posted 21 Jun 2004 12:40 pm |
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| I thought I had problems with the volume pedal pot, when I pushed it down the amp would crackle and lose power. The "pop" real loud and go back to working. Then I went direct from the amp to guitar and same thing. It doesn't do it all the time but is getting worse. I have tried spraying the connector cleaner maybe missing the right spot. Any ideas? Thanks |
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John Bechtel
From:
Nashville, Tennessee, R.I.P.
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Posted 21 Jun 2004 11:05 pm
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Give all the Nylon connectors plugged into the bottom of the Chassis a little wiggle and inward pressure. There may be a poor connection. This includes the A/C cord, if it's socketed into the chassis. It's probably one of the two Nylon plugs. (Reverb or Speaker)
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“Big John” Bechtel
Franklin PSG D–10 (9 & 
Fender ’49–’50 T–8 Custom
Fender ’65 Reissue Twin-Reverb Custom™ 15”
click here
click here
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John Daugherty
From:
Rolla, Missouri, USA
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Posted 22 Jun 2004 5:07 am
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Billy, John has a good point. Wiggle all the connectors,substitute guitar cords, rotate all controls to see if they produce noise. If so, spray cleaner in the controls and rotate them a lot.
If you still have popping sounds, you probably have a bad solder connection on the circuit board or a broken lead on a component.
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C Dixon
From:
Duluth, GA USA
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Posted 22 Jun 2004 6:22 am
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I agree.
One word of caution. PLEASE, PLEASE rotate all knobs back an forth thru their full rotational capibility with the amp turned OFF, BEFORE you follow the above suggestions.
I know from whence I speak. For some reason, this otherwise very fine Steel guitar amp, can cause a deafening and I mean deafening pop if you turn given controls unless they are clean. This is particularly true if you have not adjusted one in a while.
Finally, your problem in all likelyhood is probably due to a dirty molex connector coming from the reverb pan that plugs into the chassis.
After you have turned the amp off and then rotated all controls back and forth several times, then turn it on and IF the problem happens again, reach under the chassis and wiggle that plug. If the problem goes away or gets worse, it is dirty. A molex connector rarely if ever get loose.
If this is the case (and it probably is), turn the amp off, unplug it (it may be extremely tight) and spray some contact cleaner (available from Radio Shack) in to both the plug and socket. Them insert the plug, remove it and reinsert it again.
This will in 99% of the cases (with the symptoms you describe) cure it for a long time.
Again, PLEASE do not "cycle" those controls with the amp on. If you forget and it EVER happens to you, you will thank me for this suggestion. That pop is the loudest pop I have EVER heard. It is truly dangerous in my opinion. It has happened to me twice. I hope it never happens again.
carl |
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Lee Baucum
From:
McAllen, Texas (Extreme South) The Final Frontier
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Posted 22 Jun 2004 7:52 am
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Carl - I've had that pop blast me in the face twice. If I remember correctly, it was either the mid or mid-shift control. Not only can it be damaging to the ears, it could be damaging to other body parts when you hit the floor. It really does catch you off guard when it happens. And it does hurt.
Rotate the knobs with the amp turned off.
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Lee, from South Texas
Down On The Rio Grande
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Blake Hawkins
From:
Florida
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Posted 22 Jun 2004 8:15 am
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Unless I missed it, no one has yet mentioned the "Pre EQ Patch IN" and the "Power Amp In"
1/4 inch jacks. They have switches on them which can cause this problem. Just exercise them by inserting and removing a guitar plug several times. (With the amp OFF of course)
Mike Brown has had several posts on these.
Blake |
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J Hollenberg
From:
Vlaardingen, The Netherlands
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Posted 22 Jun 2004 9:31 am
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I had the same problem, loosing volume and crackle in the speaker.
I have replaced the pre gain pot with the pull-bright switch and till now the problem hasn't occured.
Greetings from The Netherlands,
Jack Hollenberg
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Mike Brown
From:
Meridian, Mississippi USA
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Posted 22 Jun 2004 3:47 pm
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Dittos to all of the above advice. If all of this fails, call me toll free in North America at 1-877-732-8391 and either myself our our phone technicians will be glad to assist you.
Thanks for using Peavey products.
Mike Brown
Peavey Electronics Corporation |
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