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Difference between revisions of "Macintosh LC III"
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[[File:2277fc5838557bf63214425cefd49b85.jpg|thumb]] | [[File:2277fc5838557bf63214425cefd49b85.jpg|thumb]] | ||
[[File:Macintosh-lc-iii-16.jpg|thumb]] | [[File:Macintosh-lc-iii-16.jpg|thumb]] | ||
[[File:Lc3-8va2-1.jpg|thumb]] | [[File:Lc3-8va2-1.jpg|thumb]] | ||
− | The LC III is powered by a 25MHz Motorola 68030. Apple also released the LC III+ which is essentially the same system but the board was altered to increase the clock speed to 33MHz. | + | The LC III is powered by a 25MHz [[Motorola 68030]]. Apple also released the LC III+ which is essentially the same system but the board was altered to increase the clock speed to 33MHz. The LC III does not include a math co-processor but a socket is available to install a [[Motorola 68882]]. |
At some point during the production run it seems that the case design was changed from the traditional LC front panel to what was used in the [[Macintosh LC 475]]. | At some point during the production run it seems that the case design was changed from the traditional LC front panel to what was used in the [[Macintosh LC 475]]. | ||
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+ | The LC III replaces the [[Macintosh LC II]] and is the last of the [[Motorola 68030]] based "pizza box" LCs, as the [[Macintosh LC 475]] used the [[Motorola 68LC040]]. | ||
=Notes= | =Notes= | ||
* Like almost all Macs of this era, you must recap the board due to old leaking capacitors. | * Like almost all Macs of this era, you must recap the board due to old leaking capacitors. | ||
+ | * The LC power supplies are known to require capacitor or other repairs due to age. | ||
=Troubleshooting= | =Troubleshooting= |
Revision as of 23:11, 18 July 2019
The LC III is powered by a 25MHz Motorola 68030. Apple also released the LC III+ which is essentially the same system but the board was altered to increase the clock speed to 33MHz. The LC III does not include a math co-processor but a socket is available to install a Motorola 68882.
At some point during the production run it seems that the case design was changed from the traditional LC front panel to what was used in the Macintosh LC 475.
The LC III replaces the Macintosh LC II and is the last of the Motorola 68030 based "pizza box" LCs, as the Macintosh LC 475 used the Motorola 68LC040.
Notes
- Like almost all Macs of this era, you must recap the board due to old leaking capacitors.
- The LC power supplies are known to require capacitor or other repairs due to age.
Troubleshooting
- An incompatible or faulty MC68882 co-processor will cause the system to not power on.