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Apple Hard Disk 20 repair: A success story

Saved you both the trouble!
 

HD20 Rodime Controller Board.jpg

HD20 Rodime Controller Board Electrolytic Capacitor List

C38: 47µf 16v

C41: 10µf 35v

C42: 10µf 35v

C43: 47µf 16v

C46: 10µf 35v

C48: 47µf 16v

C49: 47µf 16v

C50: 47µf 16v

Total: 

3X 10µf 35v

5X 47µf 16v

(PS. I found HD Diag!)

 
Last edited by a moderator:
Saved you both the trouble!
Bless you!  But do you also know the Diameter & Height info?  (Lead Spacing is probably 2.5mm for all of them, perhaps 2.0mm.) The reason that Diameter & Height info is important is because of the required clearance.  If I find a capacitor with the same capacitance and voltage rating, the size may be different from the original and it ultimately may not fit properly or at all.  So if you have that information, could you please post it too?

On a semi-related note...

I found the following photo HERE and modified it with a couple red arrows.  What is the purpose of those two pieces contacting each other?  Is it an electrical connection?

Rodime552.jpg

You can see the same thing in the following 3 photos of my GCC Hyperdrive here, except mind has a broken piece of blue plastic attached which I am curious about...


















 
I know this is a super old thread but I needed to bump it up to say thank you as it has helped me resurrect my Macintosh Disk Drive 20 with the original Rodime hard drive! The problem was the driver never spun up but you could hear a very faint clicking noice twice each time you would try to start it up.

Sure enough, it was the stepper motor that needed lubrication. It also got very hot when not spinning like another poster said so be very careful.

All I needed to do was to add a drop or 2 of oil into the stepper motor shaft area in the middle. Then I turned the power on and off about 20 times, each time the motor shaft would move about a millimeter. After rotating almost all the way around it spun up the drive! So thank you OP and others that have helped 👍
 
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