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| Missing capacitors on Umax Gemini secondary CPU card |
Forums > Vintage Apple > Macintosh > Clones & Conversions
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Branchus Administrator -------- Joined: Sep 2, 2021 Posts: 237 Likes: 518 |
Nov 19, 2021 - #1
Hello all,
I have a Umax Gemini secondary CPU card (604e 250MHz) but it's been through the wars and lost a few surface mount electrolytic caps. If anyone has one of these and can tell me what sort of caps I'm missing, or a picture of one that I can use as a guide, it would be greatly appreciated!
Liked by Mac84 |
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Branchus Administrator -------- Joined: Sep 2, 2021 Posts: 237 Likes: 518 |
Nov 19, 2021 - #2
I haven't had it under the microscope yet, but at a glance, it looks like the missing resistors are meant to be that way. I think the only components that were deliberately removed are the surface mount electrolytics.
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alxlab Active Tinkerer -------- Joined: Sep 23, 2021 Posts: 293 Likes: 323 |
Nov 19, 2021 - #3
I'll take a wild guess and say it's probably 47uf 16v or 100uf 16v. The Apple 604e 200Mhz card (630-2508-A) I got seems to be using 47uf 16v on the caps I can see without taking off the heatsink.
Liked by Branchus |
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alxlab Active Tinkerer -------- Joined: Sep 23, 2021 Posts: 293 Likes: 323 |
Nov 19, 2021 - #4
This has the same layout as mine:
Source: https://commons.wikimedia.org/wiki/File:Apple_820-0849-A_PowerMac_Processor_Card-8074.jpg I'll keep on looking to see if I can find anything else.
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68Krescue New Tinkerer -------- Joined: Jun 23, 2022 Posts: 16 Likes: 7 |
Feb 17, 2023 - #5
Here is my Umax primary 604e 225MHz. These cards need to team up in a in a Supermac S900, if possible....... Would definitely make a great video!
Liked by Kai Robinson |
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