68kMLA Classic Interface
This is a version of the 68kMLA forums for viewing on your favorite old mac. Visitors on modern platforms may prefer the main site.
| Click here to select a new forum. | | Quadra 650 caps | Posted by: EmmyOcelot on 2020-08-10 00:08:15
Hey everyone!
I recently got a hold of a Quadra 650 and need to change its caps asap. Does anyone know which caps are needed for it?
I'm going with tantalum caps but cant seem to find any reference on what voltage or capacitance they need to be.
| Posted by: MJ313 on 2020-08-10 00:12:30
The Q650 should have all tantalum caps on their already-- one of the few boards that didn't have those leaky cans. Always possible one went bad, but if it works fine then you should be ok.
| Posted by: cheesestraws on 2020-08-10 00:13:43
Isn't the Quadra 650 all tantalums/solid caps to start with?
| Posted by: EmmyOcelot on 2020-08-10 00:41:18
Oh score! I didn’t know after dealing with much trouble with a Quadra 610.
| Posted by: Daniël on 2020-08-10 01:59:49
Some of the Quadra models thankfully have tantalum capacitors from the factory. The 700, 800, 900, 950 and 650 have their logic boards fully populated with them. On the others, which are the 840AV, 660AV, 610, 630 and 605, they have caps in electrolytic form (although on most, not all of the caps, as on the 610 for example, other than the 16V 47uF caps, all of them are tantalums).
Yes, a downside of tantalums is that they can burn up if they short or fail, but it doesn't happen that often from what I can find, and often doesn't do much in the way of permanent damage, whereas a bad leak can be disastrous if it gets into vias.
| | 1 |
|