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Input Jack On Gk Mb-500


Bottle
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Well, was just noodling in the front room this morning - accidentally stepped on the input lead to the GK :). Think I've done some mischief, becuase now the input jack on the head has started intermittantly breaking up. I've managed to get the lid off for a look-see (in itself a bit of a challenge), and it appears the input/EQ board can move up and down a bit. I'm hoping it's just the input jack that's the problem, and not one of the traces or another component nearby.

Pity the input jack is soldered on to the board, otherwise I'm sure it'd be a simple repair that I'm capable of doing myself.

Does anyone know of a Gallien Krueger / general amp specialist in the Cambridge area I can take it to (alternatively, I can go through Bass Merchant in Colchester and have it sent back to GK, but the amp is out of warranty now, and it may take some time to do this)

Damn shame (and pretty bad timing) 'cos I've got a gig tomorrow morning, so I guess I'll have to go to plan B and take my little Line 6 Combo until I can get the GK sorted :)

Ian

Edited by Bottle
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Does the socket have a little ring that screws/clamps it to the front panel? Does that need tightening up? Does the plug move around inside the socket? If that's the case then it's probably gubbed. Anyone competent with a soldering iron should be able to replace a board-mounted socket. Hope you can get is fixed soon!

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Yep, think for now it's fixed - I managed to get the lid off to check behind the front panel, and I think it's good for now....

Tightened up the nut on the input jack and it [i]seems[/i] to have made it better :) Not sure how it will stand up to gigging yet - maybe will be OK for tomorrow (but I'm going to chuck the combo in the car as well, just to be on the safe side).

FYI used a Pozi-Drive screwdriver to get the 10 (yes, ten!!) lid screws out - PZ1 size

Jack retention nut needs a 7/16" driver, and the pots require a 10mm (go figure!) - luckily I dug out my Draper toolset and had the right drivers handy :)


I think in the longer run it would be prudent to take the thing apart and remove the input/EQ board to give it a good going over visually and with a continuity meter, just to be certain. Maybe replace the jack as well. But for today, I think it's OK (famous last words!)

Thanks for the replies

Ian

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