Apple LCIII Restoration: Difference between revisions

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Manufactured June 1992.
Manufactured June 1992.
| Heavy yellow discolouring. Unknown working state.
| Heavy yellow discolouring. Unknown working state.
| <font color="orange">Soon to be replaced with a standard VGA monitor.</font>
| <font color="Green">Replaced with a standard VGA monitor.</font> See [[Macintosh VGA]]
| Uses a somewhat non-standard 13w3 connector. This was not the standard (colour) monitor that was supplied with the LCIII, and I probably won't bother trying to get it going.
| Uses a somewhat non-standard 13w3 connector. This was not the standard (colour) monitor that was supplied with the LCIII, and I probably won't bother trying to get it going. An adapter cable to make use of a VGA monitor is more than sufficient.
|-
|-
| Power supply<br />
| Power supply<br />
Line 57: Line 57:
CPU Socket: MC68882FN25A (FPU)<br />
CPU Socket: MC68882FN25A (FPU)<br />
CPU (Soldered  to board): MC68030FE25B
CPU (Soldered  to board): MC68030FE25B
| Unknown
| Confirmed working.
| <font color="orange">Unknown</font>
| <font color="green">Working</font>
| Once the VGA monitor is connected, an unhappy face shown at bootup should confirm the logic board is generally ok.
| On boot, the distinctive power-on sound is heard, followed by a flashing question mark in a disk icon (since no disks are working yet).
|-
|-
| Ethernet expansion card (10Base-T, RJ45)<br />
| Ethernet expansion card (10Base-T, RJ45)<br />

Revision as of 06:22, 27 September 2011

This page documents the the restoration of an Apple Macintosh LCIII bought from ebay for $10. This LCIII will be the replacement for my Pop's LCIII, which was forever lost in Brisbane's 2011 floods.

Goals

  • Run a HTTP server, and serve static pages on the Internet.
  • Relive some great times playing Maelstrom.
  • Develop a custom SCSI-2 to USB Mass Storage converter (see SCSI2USB), use the converter to boot the LCIII, and win a bet. I shall enjoy eating free Nandos. Cheers AJ.

As-bought Condition

Part As-bought State Current State Comment
Keyboard Missing Still missing
Mouse Missing Still missing Replace with Apple_Desktop_Bus_Mouse_II ("Teardrop" mouse).
Monitor

Macintosh Portrait Display
15" 640 x 870 8-bit greyscale.
Manufactured June 1992.

Heavy yellow discolouring. Unknown working state. Replaced with a standard VGA monitor. See Macintosh VGA Uses a somewhat non-standard 13w3 connector. This was not the standard (colour) monitor that was supplied with the LCIII, and I probably won't bother trying to get it going. An adapter cable to make use of a VGA monitor is more than sufficient.
Power supply

Dyna Comp Inc DCF 353.
Apple part no. 614-0028
+5v: 4.75A
+12V: 1.0A
-5V: 0.075A

Dead.
All rails read 0V on the multimeter.
(Temporarily) replaced with an older ATX power supply that still had the -5v rail. Old, yet still-working, LC power supplies are fairly easy to find on ebay and elsewhere. However, these old supplies won't last forever. I plan to replace this with a small circuit board that accepts an ATX power supply input, and creates the required -5v rail. This then allows me to use an easy-to-find PicoPSU (or similar), and replace the supply in the future if it fails.
SCSI Hard drive

Apple branded Quantum Pro Drive 500Mb LPS270 (Firmware copyright Apple Computer Inc. 1994)

Dead.
The drive controller appeared to work when connected to a modern PC with PCI SCSI card, but the drive refuses to spin. No amount of hitting, freezing or swearing could convince the drive to spin.
Working SCSI device required to boot Drive will be replaced with a custom SCSI -> USB device. SCSI2USB
Case

Feb 1993
Serial *SG3077K4VA3*

Significant discolouration. Requires restoration to remove the discolouration A Hydrogen peroxide solution + UV light can be used to restore the case to its former glory. Just take care to mask the Apple logo at the front. See [1]
Logic board

Apple part no. 820-0650-A
1992
CPU Socket: MC68882FN25A (FPU)
CPU (Soldered to board): MC68030FE25B

Confirmed working. Working On boot, the distinctive power-on sound is heard, followed by a flashing question mark in a disk icon (since no disks are working yet).
Ethernet expansion card (10Base-T, RJ45)

Apple Computer Inc 1993 Ethernet LC Twisted-Pair card
Apple part no. 630-0891-B

Unknown Not required Could make use of the RS-422 serial port to run a PPP connection if the ethernet card doesn't work.
Floppy drive Unknown Not required This drive is probably not required anymore. Trying to find working floppies is difficult, and they will only degrade further over time.
VRAM Upgrade

Apple part no. 820-0605-A

Unknown Not required This is a 512KB upgrade, but the LCIII only supports a total of 768KB, including the 512KB on-board VRAM.
RAM Upgrade

Samsung KMM5321000CV-7 9428 4MB 72pin 70ns

Unknown Unknown Could be replaced with a 32MB SIMM. An additional 4MB onboard memory is available on the logic board, but this is probably insufficient to do anything useful.


Links