Macintosh LC III TLC

[pixelpusher]

On the LC III you also want to fix the orientation of this capacitor which was wrong at factory: https://www.downtowndougbrown.com/2024/ ... e-factory/

[PhilC]

I've got an LC II which I managed to get an expansion slot CPU upgrade from eBay reasonably cheap.

Also have an LC475 which I ended up needing to replace the CPU due to a couple of pins coming unstuck/corroded I put a full 040 in it instead of the EC040. Sounds like I need to build another BlueSCSI that'll also do WiFi next

[Icky]

On the LC III you also want to fix the orientation of this capacitor which was wrong at factory: https://www.downtowndougbrown.com/2024/ ... e-factory/

Thanks for mentioning. I had spotted threads about this but always good to call out on forum for others.

Recap kits for board and PSU ordered.

[Icky]

Removal of everything in this Mac is really neat, no screws all clips and nice sliding of items out.

The PSU is the first item out. A nice slime PSU:

IMG_1862.png (640.07 KiB) Viewed 970 times

Wow that's one enormous cap in there.

IMG_1863.png (473.94 KiB) Viewed 970 times

Only the caps on the right are replaced as part of the re-capping kit.

IMG_1864.png (920.1 KiB) Viewed 970 times

Mother board front and back. I did clean it but it's still looking a bit mucky. Those with a keen eye will notice I have added a heatsink to the CPU and the battery is now new.

IMG_1865.png (1.15 MiB) Viewed 970 times

IMG_1866.png (1.2 MiB) Viewed 970 times

[stephen_usher]

Yeah, it's only really the low voltage caps which go in those supplies. At least it's a TDK and not a Sony.

[PhilC]

Those are the same caps that I replaced when I did the 475. I have a spare BNC network card for one of those somewhere if it's handy for you?

[stephen_usher]

Those are the same caps that I replaced when I did the 475. I have a spare BNC network card for one of those somewhere if it's handy for you?

Oh, that would be useful. I've got a media changer to allow it to connect to 10BaseT and plenty of coax and T pieces (and terminators).

My rescued LCIII could do with being networked.

[Icky]

Update:

Recapped and cleaned the motherboard. Then chipped the clock to 33MHz http://www.applefool.com/clockchipping/lciii.html.

Need to recap the PSU now.

EDIT: Recapped PSU - https://recapamac.com.au/macintosh-lc-power-supply/

Only thing missing is the FPU - waiting on delivery for that item

[PhilC]

Those are the same caps that I replaced when I did the 475. I have a spare BNC network card for one of those somewhere if it's handy for you?

Oh, that would be useful. I've got a media changer to allow it to connect to 10BaseT and plenty of coax and T pieces (and terminators).

My rescued LCIII could do with being networked.

Here's the card, won't be able to send it for a week or so as I'm away.

PXL_20260420_201407479.jpg (365.64 KiB) Viewed 882 times

[stephen_usher]

No problem. There's absolutely no hurry.

Interesting that it has a space for an RJ45 socket with just some resistors missing otherwise.

P.S. Maybe not... there's probably a line driver chip missing too.