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Yamaha DGX630 - Digital Piano - Page 5 Questions & Answers
How can i reset my yamaha dgx 230 ??
Hi
The normal reset is to hold down the highest note ( furtherst white key to the right ) at the same time as turning the instrument on. This will initiate a factory reset.
6/29/2018 5:52:05 PM •
Yamaha Music
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1,228 views • 0 helpful votes
Yamaha mo6 keys stopped working. All except the G's and Db's. Was in Voice mode and it literally did that while I was playing. Tried a factory reset already.
The fact that ALL keys except G's and D flats are not working, points to a possible matrix or multiplexing problem.
As shown in the simplified schematic, if any traces (PCB tracks) from the mutiplexer / controller IC are broken, eg if the board has a crack, this could disable all identical notes for all octaves.
Otherwise the controller itself may have a fault.
(Some non-related info):
In reality, the synth's matrix is a bit more complicated than the basic sketch shown for explanation.
Diodes are included per key to prevent 'phantom note playing' and to isolate keys.
Velocity-sensing uses two set of contacts to sense timing from A to B contacts when key is struck.
7/19/2018 10:48:09 PM •
Yamaha Music
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322 views • 0 helpful votes
Where are the fuse in yamaha
YDP 141
Firstly determine that the power supply you are using is providing the correct voltage, check with a multimeter.
If it is correct then you need to open the piano. Look inside where the power plugs in check the little black socket and ensure that there are no breaks where this is soldered to the circuit board - very common problem. If so resolder or replace socket. Does turning the switch on make the red light come on - if not and socket is soldered correctly - suspect the switch - check continuity wilth multimeter, if switch is ok check voltage across pins 1 & 5 on CN2 on board this should read around 12v. if this doesnt show a voltage it is easier just to replace the whole DCIN board # WM227400
6/20/2018 9:40:45 AM •
Yamaha Music
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473 views • 0 helpful votes
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