Hello friends,how are you all doing? I hope you're feeling finest.
To begin with I'm not keyboard player nor an engineer but I have this keyboard sent in for repair.No power.Adapter is fine.Upon opening it I found the power supply section to be very unfamiliar looking.First of all the silicon chips are too small for my eyes to see.I had to use my phone cam zoomed to the max to really see the marking but unfortunately my enigma typewriter had jamned and rusted so I couldn't decipher the codes.Hence I need help please.I'm clueless about these components and its power supply design nature.These chips are getting tiny by the year that perhaps one day they'll invisible in circuit board lol.
IC1,IC2,F1 and IC4(I never seen an IC this small).
I had looked for Korg parts online but the whole pcb replacement(USD50 exc shipping) is out of stock.Come to think of it does make sense to just replace the module rather than trying to repair it but I like to give it a shot.
Below my attempt to enclose some photos.
I would also be super grateful if someone could share Korg Krome 61 schematics here if not the service manual.🙂
Thank you
yustech
To begin with I'm not keyboard player nor an engineer but I have this keyboard sent in for repair.No power.Adapter is fine.Upon opening it I found the power supply section to be very unfamiliar looking.First of all the silicon chips are too small for my eyes to see.I had to use my phone cam zoomed to the max to really see the marking but unfortunately my enigma typewriter had jamned and rusted so I couldn't decipher the codes.Hence I need help please.I'm clueless about these components and its power supply design nature.These chips are getting tiny by the year that perhaps one day they'll invisible in circuit board lol.
IC1,IC2,F1 and IC4(I never seen an IC this small).
I had looked for Korg parts online but the whole pcb replacement(USD50 exc shipping) is out of stock.Come to think of it does make sense to just replace the module rather than trying to repair it but I like to give it a shot.
Below my attempt to enclose some photos.
I would also be super grateful if someone could share Korg Krome 61 schematics here if not the service manual.🙂
Thank you
yustech
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
Last edited:
First verify whether the power supply is working. If so, it's much better to replace the entire pcb if it's only $50,
than to try to repair it without the proper equipment or experience.
Get the lens from a 35mm SLR camera. 50mm normal lens is good, shorter (wide-angle) may be better. Hold the back-side near the chip. Look into the front of the lens from a few inches away. Adjust the chip-to-lens distance until it comes into focus.
A 50mm lens is about a 5X magnifier; 35mm about 7X.
Camera lenses are much better corrected against aberrations than simple/single lenses. While the corrections are for distant subjects, using it backwards minimizes the difference: the object-lens path is same-as the original lens-film path.
An enlarger lens for small-format negatives is even better.
And with the death of 35mm film, such lenses *should* be available less expensively than when new.
However even if I could see it, I do not think I could diagnose that board.
- Status
- Not open for further replies.