AMI f120

[albert]

I have an ami f120. what are the ratings of three fuses in the power supply.

[Ron Rich]

Hi Albert,
What ever is either marked on the unit, or is as shown in the Service Manual-- MOST AMi's of that era, use a couple of 8/10 amp sb's, and an 8 amp main fuse--but I don't know for sure on that model ? so it's best to look--- Ron Rich

[albert]

Thanks Ron, that's it. I saw a power supply for sale and close up picture clearly shows 8a 8/10a and 8/10a. In the right 8/10a fuse there was a 1a. I read it was ok because its hard to get a .8a. I replaced it and mech completed its functions and turntable stopped spinning till I made new selection. After about 7 good tries fuse blew again. I read that if turntable rails are greased and dirty it will put strain on the motor and fuse will blow. I cleaned rails nicely and now still fuse blows. ordered repair manual but again gotta wait a week for it to come. gotta get more fuses. will disconnect chain drive motor and see if it still blows fuse.  Thanks for any insightful info you may have. Al

[Ron Rich]

Hi Albert,
I would not replace that 8/10 with a one amp in this case. That fuse size was increased, not because the 8/0 is hard to get, but because when the power supply gets older, and the motor gets dirty, it tends to draw slightly more current. Didja remove/clean/oil that motor-gear box ?? I don't believe the "rails" have too much to do with it ? 8/10 sloblo's are available "all over"--any good electronics store carries them, and I believe Granger does too ?--Ron Rich

[albert]

Thanks Ron, I will stock up on them. wire's to the turntable crumbling and shorted. Working now and have to get selector buttons to work properly. ordering some cleaner too. I can really get going when repair manual gets here.