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Connor Mac Portable 3045 40MB Drives

gkmaia

Active member
I do not have any goo on the head bumpers. But lots of white goo at the seal edges. The plate filter was soaked in good as well.

Is there any drawback in terms of alignment  if I remove the plates? Would be good to take them out and clean the whole assembly and look under the plates.

What would you use to clean a plate? IPA alchool?

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aplmak

Well-known member
I haven’t messed with the platters really.. a few times I used denatured alcohol or 90% rubbing alcohol to clean some stuff on the top plate and it didn’t affect anything. But taking them apart will be tricky. You have to make sure the heads do not touch each other. It’s a big risk but you have nothing to loose if it’s not working I guess. As I’ve said I’ve removed goo and the gooed filter successfully.. and silicone sealed top and bottom. I have a few working drives but bad boards on them. 

 

PB145B

Well-known member
It can bend the thin pieces of metal that the heads are attached to, causing a cylinder misalignment, therefore rendering the drive useless. It’s not a given that it will happen, but it’s not impossible, so letting them clamp together is best avoided.

 

gkmaia

Active member
It can bend the thin pieces of metal that the heads are attached to, causing a cylinder misalignment, therefore rendering the drive useless. It’s not a given that it will happen, but it’s not impossible, so letting them clamp together is best avoided.
Cool, thanks. that makes sense. I've made a little clip on my 3 printer to hold them safe so that wont be a problem.

One interesting thing is on the conners the platter does not fit perfectly to the motor spindle. It has a bit of play. And with that in mind I did an experiment by swapping 2 PCBs, each with it is own calibration, in the same platter assembly to check how the radial calibration would react.

And they both run perfectly. That tells me either there is a cosmic coincidence these platters had the exact same physical alignment or the tolerances for radial alignment are pretty high on these conners. 

 
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bibilit

Well-known member
I agree, I also have a full bag of bad controller boards. 

I have been able to save a few drives, swapping things around, but I have been left with more bad controllers than drives alone. 

 

techknight

Well-known member
You know, the more I think about this, the more I find it not surprising. 

The voltages tend to go hog wild in the Portable when things arnt kosher, or towards the end of its service life before needing recapped so its probably blown some ICs on those boards. 

I have found ALOT of bad SWIMs and logic ICs on portables for this very reason. Whos to say it hasnt done similar damage to the drive controllers? 

 

aplmak

Well-known member
You know, the more I think about this, the more I find it not surprising.

The voltages tend to go hog wild in the Portable when things arnt kosher, or towards the end of its service life before needing recapped so its probably blown some ICs on those boards.

I have found ALOT of bad SWIMs and logic ICs on portables for this very reason. Whos to say it hasnt done similar damage to the drive controllers?
Techknight I totally agree.. rogue voltage fried a chip or two on non recapped. It would be nice to know what chip(s) has failed.. it could be a cheap repair thus saving all these boards…
 
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