Page 1 of 1
Apple iie motherboard recapped
Posted: 08 Jun 2021 06:51
by Tomswork
I recapped my apple 2e because I was having random reboots memory errors that changed every test and poor picture quality the capacitors had bulged and leaked some black goo.
Here are pictures of the recapped areas
20210607_202552.jpg
20210607_202559.jpg
20210607_202643.jpg
20210607_202653.jpg
20210607_202712.jpg
20210607_202610.jpg
Re: Apple iie motherboard recapped
Posted: 08 Jun 2021 06:53
by Tomswork
The capacitors in question are 10uf 16v axial electrolytic
I replaced them with 10uf 15v tantalum axial
And the 2e runs like new
Tom
@rubber_jonnie
Re: Apple iie motherboard recapped
Posted: 08 Jun 2021 08:43
by stephen_usher
Oh, you should really have given those tantalums a lot of voltage headroom. The semi-official advice from manufacturers is to use a voltage rating 1.5x that of an electrolytic in the same position as tantalums can't handle the spike current as well and will be damaged by short lived over voltage.
Re: Apple iie motherboard recapped
Posted: 08 Jun 2021 08:52
by Tomswork
Kemet does make a 10uf 20v tantalum axial at about 4 dollars each. While I have the 15v ones in my kit for free
Tom
Re: Apple iie motherboard recapped
Posted: 24 Aug 2021 06:02
by Tomswork
Back together and working
20210823_214546.jpg
Tom
Re: Apple iie motherboard recapped
Posted: 24 Aug 2021 08:59
by rubber_jonnie
Looking at my IIe, it seems to have similar caps to those you've fitted, though it doesn't look like re-work.
Nice Job.