headphone plug issue?

[Japhy]

So my S.E.X. amp has been a faithful companion for at least a decade now.  Several years back, I installed the headphone plug that automatically switches to cans when you plug them in.  Recently, one channel of the speakers does not play but when plugging in the headphones both channels play fine.  Can the plug be coxed back to life, or should I replace it and if so, is it still available?

Any help would be much appreciated.

PS-Any way to get an electronic copy of the original assembly manual with schematic in electronic form?

Cheers!

[kgoss]

When the headphone is plugged in the jack contacts with the side (which go to the speaker binding posts) are broken.  Its easy to see with the amp off and on its side.  Plug in your headphones and watch what happens to the jack.  Its a whole lot easier to see than describe.

Anyway it sounds like one of your jack's contacts is not closing completely when the headphone plug is removed.  Just carefully bend it where it should be and you should be fine.  The other possibility is a bad connection from the headphone jack to the binding post.  If so, reheating those connections should take care of it.

You have to contact Bottlehead for the manual.  Let them know what version of the amp you have.

[Japhy]

I have a version of this switching jack that has a black plastic rectangular "cover" around the moving parts inside.  I have flipped the amp upside down to have a look and while I can see the tabs that the headphone plug pushes, I can really see anything else.  Perhaps there is a different version that you are referring to?

[Paul Birkeland]

I have a version of this switching jack that has a black plastic rectangular "cover" around the moving parts inside. 

IIRC, this jack has been discontinued, and you might want to just grab a Neutrik as a replacement.

-PB

[Japhy]

I'm assuming this would work including the switching capability.

http://www.rean-connectors.com/en/products/1/4-jacks/nys212

[fullheadofnothing]

That is the original jack provided. Either you can use the dropping resistor, or you can have the speakers shut off. You can't have both.

What headphones do you use?

[Japhy]

AKG K701.

[fullheadofnothing]

Those aren't super sensitive, so you may be happy without the resistors. Try jumpering across them to test it out. If the noise level remains acceptable, then you can use that jack (or the original, if you kept it) to disconnect the speakers. If you find you need the resistors in place to manage the noise level, then you will wire it as shown in the manual, and disconnect your speakers manually when you want the headphones only.