Macintosh LC III - FPU
- Thread starter Zensor
- Start date
There’s an edge in the fpu that looks like it’s two edges, that part of the socket will have two edges as well indicating pin 1hello and a short question: ...how do i install an FPU ? (i do not see any (direction-)markings on the socket)
THX
There should also be a dot on the logicboard on one side of the FPU slot to denote pin 1 of the slot, this corresponds with a dot engraved on one side of the FPU denoting pin 1 of the chip
Even though it looks like it should be possible you shouldn't actually be able to insert the FPU in the wrong directionas one corner has a angled edge which acts as a key with the socket
Even though it looks like it should be possible you shouldn't actually be able to insert the FPU in the wrong directionas one corner has a angled edge which acts as a key with the socket
Like so!
As you can see, there is a notch in the corner of the PLCC socket, as well as on the chip, which should be aligned for insertion.
As you can see, there is a notch in the corner of the PLCC socket, as well as on the chip, which should be aligned for insertion.
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THX
and.....exact: I didn't see the 2 dots (I also have these dots on the logicboard and they are actually clearly visible - I think I'm getting old)
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Thank you, lilliputian and Zensor for posting those pictures and sharing that information. I recently picked up a Mac LC III to service and restore. I had picked up a FPU and I was scratching my head and sweating the details about trying to figure out how to correctly install it.
Cheers,
Alan G
Cheers,
Alan G