Thread

Caps! IIcx -- IIci

Caps! IIcx -- IIci Hardware 19 posts Dec 1, 2012 — Sep 26, 2018

#1 Sat, 1 Dec 2012 - 09:51

you can go around the board and replace all the 16v 47uf caps, and the 16v 10uf ones too, but if you don't remember to get the 3 big round 16v 470uf caps and the smaller 16v 220uf ones, you are going to have flaky soft power issues. Even though these caps look like they are not leaking, it doesn't matter they are bad change them!

Those caps caused me all kinds of odd issues, changed them all the issues went away. In both the IIcx and the IIci.

image of the IIcx and caps:

After replacing the (3)-470uf and the (1)-220uf in the IIcx the soft power started working,

the Proper amount of ram started showing up,

Dougg's ROM Simm started working.

-No joke!!

________________________________________________________________________________________

IIcx

8 - 47uf

2 - 10uf

1 - 220uf

3 - 470uf

See below for details.

Last edit: 12/02/12 jt

#2 Sat, 1 Dec 2012 - 10:42

here is the IIci board

same thing, if you don't replace the big 470uf caps and the 220uf cap, you will have soft power issues.

________________________________________________________________________________________

IIci

8 - 47uf

1 - 220uf

3 - 470uf

2 - 10uf

________________________________________________________________________________________

(470uf 11 Cents ea) http://www.mouser.com/ProductDetail/EPC'>http://www.mouser.com/ProductDetail/EPC ... qtiF3bk%3d

(220uf 10 Cents ea) http://www.mouser.com/ProductDetail/EPC ... 2fjVDHs%3d

(47uf 10 Cents ea) http://www.mouser.com/ProductDetail/Cor ... PkSZyQc%3d

(10uf 10 Cents ea) http://www.mouser.com/ProductDetail/Nic ... qchWk7w%3d

I went with mouser over digikey because their cheapest had a 2000 hour rating vs Digikey's cheapest only having a 1000 hour rating, that is the only reason.

last edit: 12/02/12 jt

#3 Sat, 1 Dec 2012 - 17:18

Nice job of visual documentation, I like it! Well done comrade.

If you compile a table of the silk screen layer component designations with the full electrical specs, form factor (axial /radial) and a parts list we're very close to perfecting a howto format!

I really like the individual pics of components that are cropping up.

A table of DigiKey/North American, ____?____/AUS, ____?____/EEU order numbers would be most excellent.

Things are brewing nicely at the grass roots level for the ReCap project.

Thread linked: Capacitor Replacement Thread . . .

#4 Sat, 1 Dec 2012 - 18:28

ok soon to come is LC I/II/III Caps! do you like them groped like that or separate?

i was going to do classic I/II together as well.

Mac IIsi Caps! is going to be on its own

#5 Sat, 1 Dec 2012 - 18:32

Grope them any way you like! :lol:

#6 Sat, 1 Dec 2012 - 22:01

Mmmmmm groping, makes the macs even sound more interesting.

#7 Sat, 1 Dec 2012 - 23:23

Grope them any way you like! :lol:

i wish my wife said that!

)

#8 Sun, 2 Dec 2012 - 01:07

I hear you, my girlfriend doesn't like me fondling my Macs either.

)

#9 Tue, 4 Dec 2012 - 18:16

Tantalum Capacitors -(Kemet) Solid SMD 10%

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

(10uf 12 Cents ea) http://www.mouser.com/ProductDetail/Kemet/T491A106K016AT/?qs=sGAEpiMZZMtZ1n0r9vR22WQok64Lf3O164%2fPQSnlFKg%3d

#10 Thu, 6 Dec 2012 - 16:51

(Stock OEM Replacement Caps)

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

(470uf 11 Cents ea) http://www.mouser.com/ProductDetail/EPCOS/B41827A5477M000/?qs=sGAEpiMZZMvwFf0viD3Y3bI5SF5loBGn%252bsTRqtiF3bk%3d

(220uf 10 Cents ea) http://www.mouser.com/ProductDetail/EPCOS/B41828A5227M8/?qs=sGAEpiMZZMtZ1n0r9vR22T0Sv0VpBS4e%2ffGfw%2fjVDHs%3d

(10uf 10 cents each) http://www.mouser.com/ProductDetail/Nichicon/UUT1H100MCL1GS/?qs=sGAEpiMZZMtZ1n0r9vR22cJHidiDLykdRHDzqchWk7w%3d

#11 Sat, 24 Aug 2013 - 20:43

I'm in the middle of recapping my IIcx and have run into a bit of a problem: are those two 10uF caps not polarised? There's no polarity sign on the silkscreen and the white square (where the cap goes) doesn't have any chamfered edges which usually indicates the positive terminal.

After checking for ground continuity it appears that the two 10uF caps seem to be mounted the other way round compared to the 47uF caps C8-C11.

Any help / clarification would be much appreciated.

Thanks!

Ps: the Mouser link below for the 10uF is for a polarised cap, so I guess it must be a polarised one.

#12 Sun, 25 Aug 2013 - 00:05

C15 and C16? If so, on my board they were flipped the opposite direction from the 47mfd caps next to them.

#13 Sun, 25 Aug 2013 - 10:52

That's exactly what I figured but wasn't sure.

Thanks!