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Topic: Gremlins! |
Jerry Overstreet
From:
Louisville Ky
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Posted 22 Jul 2002 6:38 pm |
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At the worst possible time! Had a real important show yesterday for the SGHOF..took a Stereo Steel rack and a Boss SX700 processor...hadn't used it for a few weeks but had been working just fine..got set up and the processor
wouldn't power up...then would go on and off..Fiddled w/the plug that goes out to the power supply and, thankfully, finally got it going so I could get through the set...really rattled me though...
Figured the wire was broken at the plug but tried another power supply and same thing.
Anyhow, after removing the top I can make it work by pushing down on the jack where the power supply plugs in. I can see that the board has got to come out in order to get to where the legs of the jack are soldered in...Any of you electronic buffs have any advice on taking this thing all apart? I've spent many hours programming it and really hate to start all over with another processor. Thanks in advance for your help.
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Earnest Bovine
From:
Los Angeles CA USA
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Posted 22 Jul 2002 8:46 pm
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| When the drummer tripped over your power cord, he probably put a little crack in the circuit board. That probably broke the electrical connection that is "printed" on the board. When you wiggle the connector, you are probably making/breaking that connection. If you can see where the trace is broken, you can probably fix it by putting some solder across it and using a drum machine. Probably. |
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Bob Metzger
From:
Waltham (Boston), MA, USA
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Posted 23 Jul 2002 11:25 am
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Take it apart slowly and methodically. Make copious notes, especially if anything isn't intuitive. Put the loose nuts, bolts, screws, ect. in a container. Make a wiring diagram. Use a magnifying glass to check for CB trace cracks. Get a continuity tester (a light bulb, battery and two wires) to check that everything that is supposed to connect, does connect. (Applying AC power to this part of the circuit is only for the very experienced.) Resolder iffy connections. If a circuitboard trace has 'lifted' or is broken, you can use a small piece of wire to accomplish the same connection.
If this seems too complicated, take it to the local repair shop.
Good luck,
Bob M.[This message was edited by Bob Metzger on 23 July 2002 at 12:26 PM.] |
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Earnest Bovine
From:
Los Angeles CA USA
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Posted 23 Jul 2002 12:26 pm
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| The reason that I suspect a broken trace at the spot where you plug the power cord is that mine broke there. The plug on the lower cord goes onto a jack that is soldered dircectly onto the circuit board. The jack is not anchored to the metal box. There is no strain relief. Clumsy drummers, chick singers, and possibly even steel players can trip over the cord and crack your circuit board. You shouldn't have to take anything apart to check for this, except of course for opening up the box. |
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Jerry Overstreet
From:
Louisville Ky
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Posted 23 Jul 2002 6:04 pm
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Hey thanx fellows...sorry for the late posting but I picked my first ripe homegrown tomato of the season this afternoon and, you know, first things first.
Anyhoo, Earnest, after I read your post yesterday, I took the board out of the case as nearly as possible [1 or 2 of the leads didn't look like they disconnected] so's I could see the underside and did find an actual solder joint about 1/16 in. on each of the legs of the adaptor jack. Using my bifocals through a magnifying glass [good tip Bob] I detected a crack in the solder joint on one of the legs and was
able to get a generous drop of solder on it to repair the connnection...and it works! All's left is getting everything back in the box. Turns out not to be such a big job for me after all, but only because the damage was visible....I don't have the equip. or electronics savvy for any other testing.
As to what caused the damage...could've been the steel player, but why should I take the blame when there are so many other options? I think it was the keyboard player...he's jealous cause mine's purtier'n his....
As to your other suggestion Earnest, I'm not sure I could get used to anything nearly so steady as a drum machine....maybe if you can program the thing to play too loud, start too fast and get faster until your fingers fly plum' off your hands, or drag a ballad down to a snore...maybe so...the drummers I know think time is something you do in prison, ya know...kiddin' guys...
'Preciate the tips and advice and glad to get the gadget goin' again...I'm going to keep an eye on the drummer tho. and the chick singer..course that goes
without sayin'. Thanx again for you guys input.
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