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#297467 - 10/25/10 04:40 AM
Re: Odd foot pedal behavior....
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Senior Member
Registered: 08/22/04
Posts: 1457
Loc: Athens, Greece
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#297468 - 10/25/10 06:07 AM
Re: Odd foot pedal behavior....
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Senior Member
Registered: 12/08/02
Posts: 15576
Loc: Forest Hill, MD USA
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Bill, Yamaha uses a floating ground system, which can cause problems if you are using two foot pedals that have a grounded, metal frame and touch each other. This has been a problem for many years and was never addressed. Boss pedals, the type that locked together, were notorious for this problem. Good Luck, Gary
_________________________
PSR-S950, TC Helicon Harmony-M, Digitech VR, Samson Q7, Sennheiser E855, Custom Console, and lots of other silly stuff!
K+E=W (Knowledge Plus Experience = Wisdom.)
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#297472 - 10/25/10 09:20 AM
Re: Odd foot pedal behavior....
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Senior Member
Registered: 12/08/02
Posts: 15576
Loc: Forest Hill, MD USA
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Fran, Learn to read schematic diagrams and then you'll understand. Additionally, there were posts here and on the at least two other Yamaha sites about the problem. And, if I recall, DNJ had the same problem when he was using pedals with his PSR-2000 several years ago. On some Boss pedals (I can't recall the exact model number) those that locked together with a slide track on the sides of the pedal, the connection was made using a 1/4-inch phono jack, which was connected directly to the front of the pedal. That jack grounded the pedal to the casing, which when locked together with another Boss pedal, essentially connected the two pedals ground connections together, thus creating a single ground connection. This caused a polarity conflict in Yamaha's PSR and Tyros series keyboards up to the Tyros2. I'm not sure if the problem was addressed with the T3 because I don't have a schematic for the T3, but I doubt if the pedal boards have been changed. Bill, I'm not quite sure how your pedal problem is being created, but I suspect it could be the pedal itself. Most pedal switches are nothing more than a leaf-switch, which if used extensively, can loose the tension in the leaf springs. The pedals are easy to disassemble and repairing them often requires nothing more than a gentle bending of the leaf-spring(s) to separate the contacts a bit. They only need to be separated by about 1/16 inch, which is about the distance set by the factory. Hope this helps, Gary
_________________________
PSR-S950, TC Helicon Harmony-M, Digitech VR, Samson Q7, Sennheiser E855, Custom Console, and lots of other silly stuff!
K+E=W (Knowledge Plus Experience = Wisdom.)
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#297473 - 10/25/10 10:36 AM
Re: Odd foot pedal behavior....
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Senior Member
Registered: 09/21/00
Posts: 43703
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