[Cataptrra]

Thanks for posting this! I also own this same throttle and really like it {although I'd rather be using my 10-Amp Ultima power packs}.

So now I know what to look for if and when it may fail.

May have to go visit my local electronics surplus outlet and see if I can find a few of these chips to have on hand when or if my CMI Sounder ever fails!

BTW: Did you need a special tool to take your throttle case apart? Looks like mine has some type of Allen screws holding it together.

 

[Cataptrra]

Some units have torx screws and to make matters worse, some have a pin in the middle.
I find that a small screwdriver can remove these and then replace with a regular screw.
I do have torx, allen (metric and US) tips for universal screwdrivers.
Stay away from dollar store units as these are not high grade tempered steel.
Get good sets from sears/Lowes/Home Depot, etc.

I also have a wide assortment of driver tips, none are $1 variety, all are of good quality and been using them for years with no problems. Just got to find the right one for the job. I've come across so many different styles of screws holding things together, sometimes I've found some will even go so far as to have 4 screws, but 2 of the 4 are still different from all the rest, requiring 3 separate type tips to take the unit apart. That just drives me crazy!

All this comes from my former employment in the electronic-mechanical assembly, rework, touch-up and repair, technician, and prototype engineering labs.

Don't and can't do any of this today like I did many years ago, now being medically disabled, along with being legally blind, so soldering small things can be quite a big challenge for me now, but I still try. Just isn't up to par of the military specs I used to be able to work to!

So I have a lot of tools of the electronics and mechanical trade for that kind of work.