Caps! -- Macintosh Classic II

[uniserver]

Macintosh Classic II

8 - 10uf

3 - 47uf

2 - 1uf



(Stock OEM Replacement Caps)

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

(1uf 12 Cents ea) http://www.mouser.com/ProductDetail/Lelon/VE-010M1HTR-0405/?qs=sGAEpiMZZMtZ1n0r9vR22edRdWtfW0D7ss9IbozrClQ%3d

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

 

[uniserver]

Tantalum Capacitors -(Kemet) Solid SMD 10%

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

(1uf 14 Cents ea) http://www.mouser.com/ProductDetail/Kemet/T491A105K035AT/?qs=sGAEpiMZZMuEN2agSAc2plg9mRgM350BQreS0dFWegk%3d

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

 

[Trash80toHP_Mini]

Thread linked: Capacitor Replacement Thread . . .

 

[uniserver]

Developers Notes, Macintosh Classic II

http://members.optusnet.com.au/eviltim/macmp3/Mac_Classic_II.pdf

 

[UNA_Lion]

My version of a Classic II appears to have more capacitors.

 

[uniserver]

Yes, you are correct, I want to add yours to the Capacitor Replacement Thread "Caps! -- Macintosh Classic II Rev. 2 (Enhanced Sound)"

all i need is the Values of those caps, to make sure, and your LB is up

 

[UNA_Lion]

Okay, here is what I found. What you see is what I found printed on each capacitor. All the "2 10 16V" caps had what looked like a rectangle in front of them:

 

[uniserver]

Just did another classic II, turned out very good.

This one needed a new External SCSI port, it was completely rusted, Heat guned the old one off, then used the like brand new one from haps 6500 parts board.

Decided to hook parael up and install all ceramic caps as well.



i like how it has ceramic roms

 

[veemac]

I've got a question for the people using tantalum/ceramic caps. Does it have any effect on the audio?

I just opened a v2 version of the classic II and removed all the capacitors on the logic board in preparation for replacing them. Got another 4 compact macs in the removal/cleaning phase before I pick the right caps to put in them and I definitely want to go tantalum or ceramic so that I don't have to do this again eventually.

I've been hearing tantalum and ceramics are pretty bad for audio though. I just can't seem to find anything to help me quantify the difference.

Since the classic II I'm looking at has "enhanced sound" I'm wondering if it'll be a bigger deal with more caps devoted to audio. I think most of what I read probably came from people fixing actual audio equipment, maybe it's not such a problem in an old mac.

Has anybody noticed a difference? Is it really that big of a deal?

 

[uniserver]

Why don't you try all 3 and get some oscilloscope readings.

I have never noticed a difference with either of the Lytic/Ceramic/Tants, in any 68kmac.

However I would think an oscilloscope would visually show you if there was any differences.

sound out of a 68k mac is not for audiophiles anyways. Well maybe for the Q840av etc?

I have never been told to use tantilums with an Amiga re-cap... however the use of Bi-Polar lytics was requested for the audio circuit of both A4000's .

 

[Paralel]

Yeah, "enhanced sound", in this context, just means they drilled holes in the case. Literally nothing else changed. I always liked their "enhanced sound" euphemism for drilling holes in the case.

 

[veemac]

Haha, figures.

I guess I could test them but I think I have the world's oldest oscilloscope. Not sure if I can trust it, the thing looks like something from world war II:

http://i.ebayimg.com/00/s/NzYyWDEwMjQ=/$T2eC16VHJFwFF,EY8gQ6BRt6e1kiiw~~48_2.JPG

HAH. It probably needs more work than this mac. I'll just go ahead and do some with tantalums and some with ceramics.

Had anybody ever had to replace the non-electrolytic capacitors on these logic boards? Whats the lifespan on those?

I was a little freaked out to see that one of the electrolytics is labelled C106. There sure is a lot of little caps on the bottom of the board....