IGO3260 Integrated Circuit

[Eddy67716]

My Yamaha Electone E45 has a broken tremolo and I wonder if the motor control circuit, the IGO3260 is broken. Is there a way for me to source another one?

[tucsondave]

The 2011 Yamaha parts catalog shows the IG 032600 as being no longer available as of April 1998.

td

[Eddy67716]

Then is it possible to get a data-sheet of it. I have in my E45 service manual. a diagram of how that IC works so I should be able to build a circuit board that does the same thing. The only problem is it doesn't have the values of the resistors on them. If I knew what every pin does, I could easily do this.

[tucsondave]

Maybe this will help. From the E50 service manual.
td
Tremolo control.pdf

[Eddy67716]

Thanks, that helps to identify almost all the resistors, but there are a couple of things different. (I'd share the chip specs that I have but I have ran out of data for sharing stuff.)

I wish that was how the E45 was built so I could just find out which component went wrong, but using an IC makes a simple circuit like that more complex.

[Eddy67716]

On your diagram, it has two transistors to the right of the two not gates. on mine, it has only one transistor with a resistor going into it and one line on my diagram has three diodes on wired in series, but the last one goes the opposite direction. I thought that would be redundant. Why would one diode go a different way than the other two. I only have a bit of knowledge on diodes. I just thought they limited current from flowing in the opposite direction (with a couple of exceptions).

[tucsondave]

Why not just build that circuit and forget the IC circuit?


td

[Eddy67716]

because all of the capacitors and most of the resistors are already on the board, however It was actually your schematic which had more resistors.

[Eddy67716]

On the other hand, this site seems to sell that IC, Would it be trustworthy?
https://www.jotrin.com/product/parts/IG03260

[Eddy67716]

Does this chip require thermal paste to install properly?

[behnam]

hi . i had this problem as you . but i found the problem is not about circuit but the motor lubrication. try to put some lubricating oil inside the thin hole which is for the shaft of the motors.so you will see the motor will move slowly and after some turning it will work perfect as before.

[Eddy67716]

I ended up buying and soldering in a new IC from Jotrin Electronics (unsoldering the old one was a pain.) I used continuity on my multimeter to make sure every connection was made and I also did it over every two joins to make sure there were no shorts.

To cut a long story short, it works fine now.