Vintage Synth Repair

Santos,

The problem is most likely a bad solder connection on a pcb.
Japanese synths are notorious for inadequate wave soldering and many 
connections can crack or become thermally stressed. I'd recommend 
opening the unit and inspecting the pcb connections closely, 
including the power supply.

It could also be a connector or cable from board to board.

Good luck!

Regards,
Kevin Lightner

http://www.synthfool.com









>Hi-
>
>Here's a problem I'm going to have to troubleshoot, and I would like
>some pointers if possible.  I own a Roland D-5, and the control panel
>lights (the performance-multitimbral-rhythm-mode light, the a/b
>selector light, and the first preset light in particular)fade out and
>are inconsistently lit.  I usually have to tap the top of the synth
>to get them working again, so it looks like a loose connection, since
>these three lights fade out at the same time. 
>
>Now here's the question: How do I access the back of the control
>panel to get to those wires?  This is something I need to do
>carefully, of course, but the flakiness of the LED's might be a start
>of something else about to loosen, so I want to check it out.  I like
>the synth, even though it is an oldie, it's a great MIDI board, and I
>want to keep it maintained.  The patch/edit display screen is fine,
>and all the LED's work, so it just seems like a loose wire. Any
>suggestions would be great, thank you very much.
>
>-Santos
>
>
>
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