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How To Remove Ampeg V4B panel to get to jack

Jul 28, 2016
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Well, I accidentally stepped on the 1/4 guitar cord at practice tonight, that connected my bass to the Ampeg V4B head and the Jack in the head fell apart into several pieces one of which is lodged deep into input jack. How can I gain access to that area to remove that piece of the 1/4 jack?
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The right way to do it would be to pull the head chassis out of the head box. It is secured with screws and slides out the back. There is usually a metal shield plate over the internals that needs to come off as well. Then you would have clear access to the jack and could clear the broken part or replace the jack if it is damaged. It would take me about 15 minutes. I don't know what your skill level and tool set is. Also, if you do pull the chassis remember that the guts of the amp board could be electrified (probably not, but you cannot SEE electrons). You can easily check that with a voltmeter.
 
Hi Basslice, I’m very comfortable with tools and using a voltmeter. Where are the:

1. head chassis screws? On the side?
2. Is the metal plate in front or back of the box?

Thanks!
 
By taking off the side screws, I can see the chassis lifting, however it does not seem able to lift over the internal frame of the head box (hard to tell in the photos, but there is a vertical wood piece that is about 3 inches high in which the chassis is unable to lift over) This is the “newer” V4Bs. It does seem it could feasibly be pushed forward but it appears I need to remove the grill first and not sure how that’s secured.

I can easily see once the chassis is out to go in through the top to get to the input jacks.
 

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Oh and I’ve tried magnets and pliers to no avail.

(How this started was I took old cables that stopped working and put some cheaper ends on them and was testing them out. They sounded fine until I stepped on and pulled the cable at an odd angle. Good news, my soldering held!)