FDD maintenance matter

[a24tanabe]

Hi,all.

I'm trying to restore FDD 1.FDD 0 is OK,but FDD1 is broken.
It shows "CRC error" or "improper disk" or "unformatted".

Upon starting restoration,I googled about FDD.
It says "re-greasing needle screw" and "renewing caps", and so on.

I tried re-greasing but it doesn't work.
When re-greasing,I turned needle screw by hand.
Was it OK? Wasn't it make FDD's head positioning structure wrong?
I'm afraid of it.

One web page says "re-gressing is easy by turning needle screw by hand".
But I didn't confirm it is true.

Must I recalibrate head position? How can I do it?

I'm working original X68000. PSU is already restored.
Any suggestion is welcome. Please help me!

[neko68k]

replace the caps.

[kamiboy]

Dont touch the head until you have replaced all the capacitors. Chances are it will work once you do.

Recalibrating the head is a big hassle.

[gypsie]

3"5 ou 5"15 drives ?

[kamiboy]

The latter since he mentions that this is one an original X68000.

But replacing caps applies to either model.