Question:
So i have my Marshall 1987x, the problem in that the high channel is crazy bright. I think i have found the problem the bright cap. Form what i have read once you turn it over half it goes away, but this is not really a option since there is no master volume. So i take the amp apart to find that the bright cap is mounted on the board. What is the best and cleanest way to pop this bad boy off. Here is a pic of what one lloks like. The cap looks like the Grey Lego blocks and is Located at C-5, but of course in this pic the man had his removed. How should i do this
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another thing just to tickle ya. Curt Mitchell mod's his marshall's with an extra pre amp tube so he doesnt have to turn it up as loud to get the saturation and stuff.
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you'll need a soldering iron, desoldering pump, and a pair of tweezers.
use the soldering iron to heat to the solder joints, then use the pump to suck up the molten solder. this might need to be repeated a few times. once most of the solder has been removed, grab the cap with the tweezers, and use the soldering iron to tease the leads out of the board.
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If you want it gone forever, just take pliers, wiggle it back and forth and bust it off.
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oh, and i looked at the pic again, sicne the cap doesn't appear to have been replaced with a jumper, you could probably get away with desoldering only 1 side and bending that lead out of the way.
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Originally Posted by Major Tom If you want it gone forever, just take pliers, wiggle it back and forth and bust it off. Haha easier said than done. that bad boy is on that board good. I can't get it to move.
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Originally Posted by wesley7777 Haha easier said than done. that bad boy is on that board good. I can't get it to move.
don't try and force it too hard with that method, i've cracked boards before doing that.
if you get someone to help you you won't really need the desoldering pump, loosen on side, and have him grab the cap before the solder cools.
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Originally Posted by What5647 don't try and force it too hard with that method, i've cracked boards before doing that.
if you get someone to help you you won't really need the desoldering pump, loosen on side, and have him grab the cap before the solder cools. Agreed. Just de-solder the darn thing.
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You certainly could de-solder it, but that looks like a lot of work, taking it all apart to where the board can be flipped upside down. That's an epoxy/glass pc board, you won't break it. You could also try to pry it up and out. Flush ground side cutters oughta work good too. The leads of the cap are copper, which is a fairly soft/weak metal, not too hard to break off. If it were on my work bench, I'd try my little flush cutters first, if they didn't get underneath it I'd get the pliers and twist it back and forth 'til it broke and then cut the leads off.
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Originally Posted by Major Tom You certainly could de-solder it, but that looks like a lot of work, taking it all apart to where the board can be flipped upside down. That's an epoxy/glass pc board, you won't break it. You could also try to pry it up and out. Flush ground side cutters oughta work good too. The leads of the cap are copper, which is a fairly soft/weak metal, not too hard to break off. If it were on my work bench, I'd try my little flush cutters first, if they didn't get underneath it I'd get the pliers and twist it back and forth 'til it broke and then cut the leads off. Yeah that is what i am thinking to major tom.
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no offense to major tom, i respect his oppinions, but there's a right way and a wrong way to do things, i'm not certain that this is best. maybe i think that because if it was me i wouldn't think twice about taking the entire thing apart to do this mod. also, desoldering has the added advantage of being reversible.
maybe i'm starting to think too much like an engineer.
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Originally Posted by What5647 no offense to major tom, i respect his oppinions, but there's a right way and a wrong way to do things, i'm not certain that this is best. maybe i think that because if it was me i wouldn't think twice about taking the entire thing apart to do this mod. also, desoldering has the added advantage of being reversible.
maybe i'm starting to think too much like an engineer. well if i did not have to take the entire amp apart to do it then i would. But i would have to be able to get to the other side of the board to unsolder it. Which would require a lot of work.
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well then go with the flush cutters. they will work, no arguments there. and if you ever want to replace the cap you have to take it all apart anyways, may as well remove what's left then.
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Originally Posted by What5647 well then go with the flush cutters. they will work, no arguments there. and if you ever want to replace the cap you have to take it all apart anyways, may as well remove what's left then. Actually you would not, the man's amp above just attacted it across the volume knob. If you look you can see a cap solder on it (bottom Knob) which he had done by a pro to add some brightness.
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i was wondering why that was there. now that i've taken a closer look at the rest of the wiring all that makes sense.