Hi @hakimj
I’ve highlighted what I think may be the problem in the image below (or it certainly looks like it to me anyway). This is a zoomed in image taken from the 3rd image that you posted.
(click on image to enlarge for better viewing)
It appears that there is an insulated jumper wire that connects between the diode that is connected to the key and the note multiple track where it comes from and goes to the next note. I assume that is all that it is as it has to span across other tracks without electrically touching them to connect the diode which is connected to the key and the track multiple connection to the other notes that share the same wiring path
I’m assuming that the notes you mentioned that don’t work are this key and the notes to the right of the key, is this correct?.
Looking at the other keys you can see the copper pad where the jumper is soldered to ( I assume that it is soldered) and also where the multiple track comes into the pad and then goes onto the next note in the particular wiring multiple, whereas on this particular connection it is not visible at all.
First you would need to use a DMM’s (digital multimeter) Ohms function, to check for continuity between the two blue arrows as shown in the image (I think that I traced the track OK - double check) and if no good, unsolder the jumper (in the red box) and check the pad and then measure between the two green arrows. It may just be a faulty track/pad/jumper connection.
If the pad has ”disappeared” or is too damaged to be fixed by connecting jumpers to it, then you can run an insulated wire from the diode connection (blue arrow on key - not too much heat as it may become loose ) to the diode connected to the key to the left (blue and green arrows are on diode) and then trace the track from the “missing pad” to the right to find which key (and diode) it connects to first and then run another insulated wire to it from the same place as the first wire i.e. you are effectively bypassing the damaged section of the track multiple so that the keys are all connected again. Hopefully this makes some sense
War diese Antwort hilfreich?
Bewertet
Rückgängig machen
Bewertung
3
Abbrechen
Schau durch den Thread, bis du den richtigen Platz für diesen Kommentar gefunden hast. Klicke dann auf "Den Kommentar diesem Post zuordnen", um ihn zu verschieben.
4 Kommentare
Not sure if @hakimj had resolved this fault?
von Will C
@willcee
I don't know but @nathan_dixon_1993 had the same if not a similar problem and he solved it using the Chosen Solution.
See the post below the Chosen Solution
Click on the image to see how he bypassed the faulty track multiple with wiring between the keys.
von jayeff
Hi, I can't seem to find a way to open the piano.
How do you disassemble the piano?
von Ork Hossain Muntaqin
@hakimj I just bought a Korg B2N (used) and I have the exact same problem! All of the C’s, E’s and G#’s not working.
Were you able to fix the problem?? If so did you do it yourself ? I am useless at this type of stuff.
Please and thank you!
von LaurelB