Caps! -- LC 575

#1 Tue, 4 Dec 2012 - 10:05

Macintosh LC 575

2 - 100uf

10 - 47uf

(Stock OEM Replacement Caps)

(47uf 10 Cents ea) http://www.mouser.com/ProductDetail/Cornell-Dubilier/AVE476M16D16T-F/?qs=sGAEpiMZZMtZ1n0r9vR22ZHbAXPxCSuoQIsUPkSZyQc%3d

(100uf 10 Cents ea) http://www.mouser.com/ProductDetail/Nichicon/UUR1C101MCL1GS/?qs=sGAEpiMZZMtZ1n0r9vR22c6R7xyAoiyG9Yp%2fFWcZCyc%3d

#2 Tue, 4 Dec 2012 - 18:06

Tantalum Capacitors -(Kemet) Solid SMD 10%

(47uf 43 Cents ea) http://www.mouser.com/ProductDetail/Kemet/T491C476K016AT/?qs=sGAEpiMZZMtZ1n0r9vR22WQok64Lf3O1OdZc8yJGuPA%3d

(100uf $1.11 Bucks ea) http://www.mouser.com/ProductDetail/Kemet/T491C107K016ZT/?qs=sGAEpiMZZMtZ1n0r9vR22feWHVMpUcWY1QCQQ40N%2f%2fc%3d

#3 Thu, 6 Dec 2012 - 04:08

Thread linked: Capacitor Replacement Thread . . .

#4 Fri, 7 Dec 2012 - 07:27

Macintosh LC 575 Developer Notes

http://www.preterhuman.net/texts/computing/apple_hardware_devnotes/Mac%20LC%20575.pdf

#5 Mon, 14 Jan 2013 - 06:58

Just re-capped with Tants installed.

This one after the re-cap, in testing, was doing something VERY strange with with floppy drive in my CC. Clunk Clunk Clunk.

I pulled it back out and did some inspection, noticed some oddness with some traces going under one of the tant caps.

ended up lifting one pad, fixed it with a little bit of wire wrap,

also this one had lots of corrosion. I used the dremel with the wire wheel to get all the corrosion. also looks like this one was ran in a dish washer.

You can really tell. There was white caky residue in between many of the ic pads.

#6 Mon, 14 Jan 2013 - 10:16

By the way, it does work just like it should now.

I can't say what exactly I did to fix it, however my guess would be the corrosion in between the IC pads, there is not a chip that says SWIM, it was probably integrated into one of the VLSI chips.