Question about Music
This is not something that spare parts would likely be needed for.
The first thing to determine is if in the piano mode that the unit first comes up in do you get this problem. If you do not, the UNIT is likely OK electronically. If you DO get the problem as a plain piano at start up, then one or more disconnect diodes (small 1N4148) are probably shorted. This is VERY uncommon occurence. These diodes are on the contact boards of the keys themselves. Contamination of metal such as a paper clip or metal shard could cause the same thing.
The Tyros II has MANY features and a lot of these create layers that fire other notes when using styles as part of the stylle rhythm.
The keyboard split features that allow the keyboard to act as three seperate ones can lead one to think there is a problem.
I have two Tyros I and one Tyros II and have worked on all of them as they were purchased as damaged and non-functioning. I have schematics on CD and those are available from Yamaha America parts dept in California. They are copyrighted but they will sell you the CD with schematics, etc. for about $15.
I can help you troubleshoot the problem if it really is a problem. The first thing is to see if problem exists in the piano mode at startup. If it does, then try each note in combination to establish a pattern. If a disconnect diode is shorted, you will find certain notes interact. You need to find which are OK and which causes problems... Defining the keys as problems in chords does not help as we need key numbers such as C3 or F#4. Do the searches ONLY using two keys at a time as a matrix problem cannot be diagnosed doing three at a time or more.
Posted on Aug 03, 2010
My tyros 1 has developed a sound problem. it is playing very distorted sound output, any ideas to finding the fault please ?, thank-you colin
Posted on Sep 09, 2010
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Posted on Jan 02, 2017
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