The problem in not in the ROM chip name

I found other disk with the same problems that my patient disk always BSY, and change tree different PCB´s and it work. but in my patient disk it dont work.

What should be ? heads ?? SA ??

Thanks
ZeBong

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ZeBong
" что случилось в России - останется в России "
" Россия еще раз"

you should measure the preamp, maybe the voltage spike kills them as like the OTP eprom..
Additionally, the heads can be different, so you need to find the matching ROM binary for trying....

Janos

Hi thanks to all,

I try to change heads with a good donnor but my drive start clicking now.

Put back the heads in the donor drive ... the same happen clicking..

This model have also aligment problems, it have a screw in the back side off the disk to the head.

ZeBong

_________________
ZeBong
" что случилось в России - останется в России "
" Россия еще раз"