Roland RD300SX electric piano of 2004, incidently very different from the RD300S on
- posted
9 years ago
Roland RD300SX electric piano of 2004, incidently very different from the RD300S on
Just in case anyone wishes to try similar. Razorred back the blue lettering side of the ribbon either side of break, made more definite, so cannot intermittently remake after this bridging Robbed slide contact from a new smallest size slide switch. Only a fine notch between contact faces, so stripped some seriously multistrand fine copper wire to loop into that notch. Twisted up and soldered off , to give some pretension to the contacts, ie to similar degree as the header contacts . Keep the excess wire in place to help sliding over the ribbon edge. Check for continuity. Swathe in hot-melt glue . Proof tested by checking continuity while locally bending, positive and negative, to about 30mm radius of curvature. Not that there is any bending, in use, just as some sort of integrity test. More generally within the width of a ribbon , perhaps, make a hole between conductors, cut in half one of these switch contacts , place over bared trace, pass copper wire loop through the hole and twist up against tiny washer and solder off, cut off excess wire. I wonder if anyone has tried "cigarette paper" spot-welding a bridge connection on a ribbon cable. A thin bridge strip clamped in place over a barred trace , with some thin cigarette paper , in between. Connect a high A, low V transformer (+diodes?) to it, with a current monitoring relay mains cut out. Clamp up tighter until the current bridges the gap and forms some sort of spot weld. Repeat for the other contact. Would it fail in similar fashion to trying to solder to such ribbon traces?
Your post was not understandable.
Did you fix a broken copper foil?
Mikek
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yes
I would estimate the "insertion force" for sliding the 2 contact modified ex-switch contact over the edge of the ribbon was about 1/4 to
1/10 of the force required to insert the 22 way ribbon in its header, so similar or greater contact force for the "repair"ElectronDepot website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.