Editing Macintosh 512K

{| class="wikitable" style="float: right; margin-left: 10px; width: 300px;"
|+ style="font-size: larger;" | Macintosh 512K
|-
| colspan="2" style="text-align:center;" | [[File:Macintosh512K.jpg|250px]]
|-
|'''Manufacturer''' || Apple Computer, Inc.
|-
|'''Type''' || Personal Computer
|-
|'''Release Date''' || September 10, 1984
|-
|'''Discontinued''' || April 14, 1986
|-
|'''Introductory Price''' || US$3,195
|-
|'''CPU''' || Motorola 68000 @ 7.83 MHz
|-
|'''Memory''' || 512 KB RAM (not expandable)
|-
|'''Storage''' || 400 KB 3.5" floppy drive
|-
|'''Display''' || 9" monochrome CRT (512×342 pixels)
|-
|'''Sound''' || Monaural 8-bit, 22 kHz (4-voice)
|-
|'''Dimensions''' || 13.6" H × 9.6" W × 10.9" D
|-
|'''Weight''' || 16.5 lbs (7.5 kg)
|-
|'''OS''' || System 1.0 – System 4.1
|-
|'''Predecessor''' || [[Macintosh 128K]]
|-
|'''Successor''' || [[Macintosh Plus]]
|-
|'''Codename''' || Engine, Hero
|-
|'''Model''' || M0001W
|}

== Historical Background ==
The '''Macintosh 512K''', released on **September 10, 1984**, was an improved version of the [[Macintosh 128K]]. It featured **four times the RAM (512 KB)**, allowing for improved multitasking and compatibility with a wider range of software. It retained the same **Motorola 68000 processor running at 7.83 MHz** and the **9-inch monochrome display** with a **400 KB floppy disk drive**.

Due to its increased memory, the Macintosh 512K could run more advanced applications, including **MacDraw**, **MacProject**, and **Microsoft Multiplan**. However, it still lacked built-in support for an internal hard drive, relying on external floppy drives for additional storage. The 512K model was succeeded by the [[Macintosh Plus]], which introduced **expandable RAM and an external SCSI port**.

== General Maintenance ==
For detailed general maintenance practices including cleaning, PRAM battery handling, connector corrosion prevention, and voltage adjustments, please see the dedicated [[Macintosh 512K General Maintenance]] page.

== PCB Schematics & Service Manual ==

The Macintosh 512K features two primary PCBs: the **Logic Board** and **Analog Board**. Below are the detailed schematics and the official Apple service manual.

=== Apple Service Manual ===
[[File:Macintosh 512K.pdf|center|thumb|Apple Service Guide - Macintosh 512K]]

=== Logic Board & Analog Board Schematics ===

{| class="wikitable" style="width:100%; text-align:center;"
|+'''Macintosh 512K PCB Schematics'''
|-
! style="background-color:#f2f2f2; width:50%;"| Logic Board
! style="background-color:#f2f2f2; width:50%;"| Analog Board
|-
| [[File:Macintosh512K_LogicBoard.jpg|thumb|center|250px|Macintosh 512K Logic Board]]  
[[File:Macintosh512K_LogicBoard_Schematic.jpg|thumb|center|250px|Macintosh 512K Logic Board Schematic]]
| [[File:Macintosh512K_AnalogBoard.jpg|thumb|center|250px|Analog Board]]  
[[File:Macintosh512K_AnalogBoard_Schematic.jpg|thumb|center|250px|Analog Board Schematic]]
|}

== Capacitor Replacement Guide ==
Detailed capacitor replacement guidelines for both analog and logic boards can be found on the [[Macintosh 512K Capacitor Replacement Guide]] page.

== Retrobrite ==
To address plastic yellowing, detailed instructions can be found on the [[Retrobrite]] page.

== Troubleshooting ==
A comprehensive troubleshooting guide addressing no power, chime but no video, intermittent operation, Sad Mac errors, and floppy drive problems is available on the [[Macintosh 512K Troubleshooting|Macintosh 512K Troubleshooting]] page.

[[Category:Apple Vintage Computers]]