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8250/1001 type Matsushita drives suffer from bad electrolytic caps

fachat

Experienced Member
Joined
Apr 24, 2010
Messages
119
Location
near Heidelberg, Germany
Hi there,

just in case you haven't heard already - it seems the 1001/8250 Matsushita disk drives in the SFD1001, 8250LP and 8296-D suffer from leaking electrolytic caps.

Here is an (unfortunately German) repair instruction with pictures: http://forum.classic-computing.de/index.php?page=Thread&threadID=7382

The first drive I opened (of my five of this type...) was already damaged...

André
 

Pet Rescue

Experienced Member
Joined
Dec 15, 2010
Messages
484
Location
Staffordshire, England
André thanks for the heads up as I have an 8296D and 2 8250LP's it's another one to add to my list along with:-

TED's
8501's
PLA's
SID's
6509's
6525's
6530's
6532's
6551's
Backup batteries
Tantalums
Mains filters
Electrolytic Caps

The joys of vintage electronic ownership! :D
 

RobertB

Veteran Member
Joined
Mar 20, 2006
Messages
842
Location
Visalia, California
...it seems the 1001/8250 Matsushita disk drives in the SFD1001, 8250LP and 8296-D suffer from leaking electrolytic caps.
Thanks for letting us know. Time to test out the SFD-1001 and run the 8296-D. If the 1001 is faulty, I'll let Ray Carlsen replace the caps. (He's already replaced all the caps in my four MSD drives. They were all leaking!)

But he's never worked on a 8296-D,
Robert Bernardo
Fresno Commodore User Group
http://www.dickestel.com/fcug.htm
July 18-19 Commodore Vegas Expo v11 -
http://www.portcommodore.com/commvex
 

jltursan

Veteran Member
Joined
Sep 24, 2010
Messages
762
Location
Madrid, Spain
Indeed, mine was absolutely new; but non working. Once opened I found most of the caps leaking and a really corroded PCB. After some rewiring and recapping (and some other gore surgery after breaking the flat cable) the SFD-1001 was alive again.

Has anyone idea if the 2031LP uses the same Matsushita mechanisms?
 

fachat

Experienced Member
Joined
Apr 24, 2010
Messages
119
Location
near Heidelberg, Germany
Thanks for letting us know. Time to test out the SFD-1001 and run the 8296-D. If the 1001 is faulty, I'll let Ray Carlsen replace the caps. (He's already replaced all the caps in my four MSD drives. They were all leaking!)


It is not sufficient to "run" the drive. It may be leaking and damaged and still working, like mine. When it's not working anymore, damage is already substantial because it has completely eaten away pcb traces.

Unfortunately these drives are difficult to de-assemble to a) actually see the damage and b) repair it....

I hope my replacement parts arrive before the weekend, so I can fix the first and get on with the others I have...

André
 

bozimmerman

Experienced Member
Joined
May 26, 2005
Messages
52
Location
Austin, Texas
Well, I sure appreciated this thread. After reading it, I went back and discovered that two of my SFD-1001s which I'd recorded as working were now non-functional. So far I've brought one back to life by recapping.
 

NeXT

Veteran Member
Joined
Oct 22, 2008
Messages
6,943
Location
Kamloops, BC, Canada
I've been noticing this happening in other drives as well. The low profile 5.25" drive in my Compaq for example couldn't control its speed because the caps had given out.
 
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