Apple Macintosh LC III (1993) Full Tour and Disassembly
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- Опубліковано 21 лип 2024
- Welcome to Jason's Macintosh Museum!
From Jason's Macintosh Museum, we have an Apple Macintosh LC III from 1993 on display. This video will show the exterior of the Macintosh LC III, along with a discussion of the features and specifications.
The Macintosh LC III will also be disassembled, to show the various components in more detail.
Apple Macintosh LC III
Introduced : February 1993
Discontinued : February 1994
CPU : Motorola 68030 running at 25 MHz
CPU Data Bus : 32-bit
FPU : Optional 68882
RAM : 4 MB RAM (expandable up to 36 MB)
Disks : Internal 1.4 MB SuperDrive, 80/160 MB SCSI hard disk
Video : 512KB VRAM onboard, expandable up to 768KB.
Expansion slots : 1 x LC PDS connector
Supported Macintosh System (MacOS): 7.1 to 7.6.1 - Наука та технологія
Used this machine extensively back in the day, the ultimate LC indeed.
lactobacillusprime The LC III was indeed a good system - but I think that the LC 475 was the ultimate LC. Having the 040 CPU in the same compact case made it even better!
Jason's Macintosh Museum You're absolutely right, a faster machine; a 68040 in an LC form factor. Sadly didn't own that one.
lactobacillusprime You can overclock a 25 MHz LC III to 33 MHz by moving the zero ohm resistor from R14 to R74 and get a 32% boost in performance for pretty much free.
Cool thanks!
Just remember to add a heatsink to the 68030 because it gets REALLY hot.
Wow, this machine is a maintenance dream come true. I wish Apple did sth like this again.
Thanks for explaining the style changes and reasons for it. I had a non auto inject floppy LC III, always wondered why they had the change of styles
parad0x666 It is a shame that Apple made that change - it was simply a cost-cutting measure, which resulted in a less attractive case style (in my opinion!). If you examine an auto-inject and manual-inject floppy drive, you can see why Apple did this however - the manual-inject drive is far simpler, and would have been far cheaper to manufacture.
Jason's Macintosh Museum That's true, I kind of liked the 'cleaner' design of the later models however, with the smooth front. Probably also because I owned one :)
I have a heap of Classic Mac's stored at my parent's house - they'd love to get rid of them and I should really try and help them out. Get in touch, I'll need to do an inventory but I might have some models that you're missing from your collection :)
My very first Mac! My parents got me one second hand in 1995 as my first colour Mac :-)
I had an LCIII and it served me well from 1993 to about 1998. I upgraded the memory and that was very expensive. I added an external CD rom drive when they became a bit more affordable. I also bought a modem 9600 baud and did AOL. They started making the internet accessible and this was the 1st computer I used on the web. It was a great value back then to get an MAC IICI 030 speed at an LC price. I then bought a Beige G3 with a 17" monitor to replace the LCIII.
Do you remember what model of monitor you used with this?
@@hellion9547 it was the 12 inch or 13 inch trinatron crt i know as i have both and also 2 lc 3s to go with them
Thanks for the video. I certainly wish iMacs were as easy to disassemble.
90s kids will remember the LC in the classrooms
Got an LC III (earlier one like yours) with leaking capacitors. Replaced them all with tantalum, and it still didn't boot. Put it in the dishwasher, and now it works perfectly!
My memory of the U.K. range was what you call the LCIII+ (33mhz 030) was sold here as the performa 460.
I believe the core design of the LIII (and LClll+, performa 460) was carried over into the much faster, later
LC475 (which used the LC040 @25Mhz). Did Apple design the System with its full 32bit board etc deliberately to allow for this later development?
Very nice informative and well presented videos!
My elementary school had these LC III's, along with the apple IIgs as well as a few random Macintosh color classics.
Another great and informative video! I just picked up one today and will be interested to see if it's a plus or not. It does have the auto inject floppy drive, so that's cool.
Good show. I got a hold of a good working LC III a few weeks ago; my first 68k Mac. Interesting note of the III+ not being identified as such on the front panel, I didn't know that. Made me open up my III to confirm the model! The guy who runs the MacCaps repair service has also cited the LC III as his favorite Mac.
I think your camera actually had a smudge on the lens - seems like it from the brownish haze and that it's worst in the center and more clear around the outside.
***** Interesting - I will check the lens when I do my next video! The camera that I use normally has no issues with its' white balance, iris, or contrast in automatic mode - except when I film a CRT display. I have to use manual focus, manual iris, and manual white balance for that.
Have you recapped it?
You're the man Jason
you should make more video's Jason! Great content!
Got a super upgraded one for sale (even has the IIe card). Need to clear out the classic electronics.
Adding to the confusion of the LC III, there are three models of it that can all look identical. The original had a 25 MHz CPU. The LC III+ (which can also look identical to an LC III) had a 33 MHz CPU. Then there was the LC III that used an LC III+ logic board but ran the 33 MHz CPU at 25 MHz.
In order to tell what speed your CPU is running at without using Apple System Profiler is checking the position of a zero ohm at R14 on the board. If there's a resistor installed here, your CPU is running at 25 MHz. If there isn't one here, and instead one is present on R74 then the CPU runs at 33 MHz.
Great to see a channel like yours! I have recovered one lcIII that my parents used back in the day, and I have solved some issues like the battery and swapped some caps. I’ve never used on of these, and when turned in it works, mouse works though I haven’t managed to find a cable for the keyboard II so it’s just mouse right now. Thing is I get a kind of WARNING, basically the whole screen is blank but in the middle a Icon of what I believe to be a floppy disk, with a interrogation mark. Can’t get passed that warning, any ideas?
I remember that the original Macintosh LC had an option for two floppy drives and no hard drive. I'm not sure if the LC II had that same thing (because I haven't yet watched your video on the lC II yet), but I noticed for sure that the LC III did not have that cutout for a second floppy drive on the front panel, as well as not having the second floppy drive connector on the motherboard.
Also, I thought that the LC III had a soft power switch and not a hard power switch.
Jordan Woolery The LC II did not have the option of a second floppy drive (due to the fact that almost no LCs were ordered with this option).
I have a lciii where someone cut the plastic grill out of the base. No idea why someone would do that. Increased airflow?
I have one of these with an Ethernet card. Problem is, it’s missing an HDD and a working floppy drive... so until I can find replacements or solid state versions, it’s kinda stuck without any functions.
Have you had to do capacitor repairs on your LCs?
In theory, if you were to do a board-level upgrade, this machine could get up to 48MB RAM. I'll report back when I test this.
Do you know where I could get a 4pin mobo to molex connector for these macs? And would there be a reason why one of these cables suddenly fail? I have a Macintosh IIsi and either the motherboard tracers or the cable suddenly failed over about 10 years ago, and gave it back to it's rightful owner, my uncle, when he passed, my aunt gave it to me to sort out, then it wound up as my birthday present, and I really want to get it working again. I was able to power the HDD with an external PSU until that no longer worked, It may be the PSU, the Molex connector or the hard drive I dont know, Can you help?
AfterDark3 I have never seen that 4-pin to Molex connector fail - but it should be fairly easy to find, as many models of Mac used that connector (all pizza-box LCs, IIcx, IIci, IIvx, IIvi, IIsi, Quadra 650/660/700, Centris 650/660, PM 7100) The LCs used a short cable, whilst all other models used a longer one, but it can still be used in an LC.
You should check for power on the 4-pin connector with a multi-meter to verify that power is reaching that connector, and then verify that power is reaching the Molex connector. My guess would be that the hard drive may be at fault, not the cable or logic board. For example, if the drive has "stiction", then it would show no signs of life, even though it may be receiving power.
Hello, Can you please help me. My Macintosh LC3 don't start. When the screen is open, there's just on it a "disquette" (in French) with a interrogation point. Thank you by advance.
Apparently nobody answered you. This symbol means the computer cannot find a disk with a System Folder on it. Perhaps your hard drive has died or become corrupted. If you can get somebody to make a floppy disk set of System 7's installer you can boot from it (just turn on the computer and put it into the drive when the "disquette" symbol comes up) and see if the hard disk is useable. If it is, install System 7.
Are you not doing any new videos?
Hey Jason, thanks for making these videos. I miss the old pre-OSX macs and MacOS. I have a bit of a gift for you. Years ago I'd imaged my LC3 and saved the image, and BIOS file. I've uploaded it to the Internet Archive. Enjoy: archive.org/details/Lc3Backup
How do you make that cool intro
TheDutchAlchemist I used Windows Movie Maker for that - with a series of still images of each model, along with the relevant startup chimes. The built-in transitions available within Movie Maker are then used to put them all together...
Jason's Macintosh Museum I had a similar question asked on one of my videos about a similar thing, and they thought that I had made the whole thing in Flash or something, but I told them that I also made it in Windows Movie Maker and they were shocked. :P
Do you got a download of the startup songs ?
I have 2 of these machines with there monitors and mouse and printer all for free