Korg Forums

[Ricoche]

Hello everyone,

I recently acquired a used MS2000. The synth would lose power if the adapter connected to the DC in Jack was wiggled. The adapter is perfectly fine. I've done basic repairs like this before which usually just meant touching up the solder on the DC input legs on the PCB board. However, I noticed that the problem with this board was that one of the legs had lifted the actual pad from the PCB board. When I desoldered the legs the pad was indeed pretty much gone. Now I'm looking at either finding a way to replace the pad OR wiring a jumper cable between the leg and one of the traces. This is the problem. The service manual does not show the path of the traces, so I'm not sure from where to where to solder the jumper wire.

The MS2000 is now basically dead unless I can get that DC power input jack wired up. Does anyone have the schematics or understand how to jumper this? Note I repaired a Korg Polysix that had battery leakage with about 18 jumper wires, so I understand the process given a proper PCB schematic. Granted I don't understand everything in the MS2000 service manual, but it does seem a bit crappy compared to other synth manuals I've used for repair.

I'd welcome any advice or ideas for a possible solution to either fixing the DC input jack or hard wiring the adapter cable onto the PCB somewhere. I can confirm that everything on the MS2000 works perfectly. I just can't get power into the board.

Thanks very much.

Jim
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Jim Atwood Japan

[Ricoche]

Problem has been fixed. I soldered jumper wires from the DC Input plug +/- sleeves to C1 on the PCB board. The MS2000 powers up beautifully and the power on/off when wiggling is gone! Very stable now.
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Jim Atwood Japan