Macintosh Classic

For more information, see this article's corresponding Wikipedia page: https://en.wikipedia.org/wiki/Macintosh_Classic.

This device is in the WorkNeeded:OriginalParts category because it was flagged as missing information on the original parts. It may have replacement parts listed but those cannot be assumed to be identical to the originals. If you have a list of the original parts, please feel free to add them by copying the relevant table from EditorsToolbox:Tables

This device is in the WorkNeeded:ReplacementParts category because it was flagged as missing information on replacement parts. If it has the original parts listed you may be able to search for replacements using the parametric searches available from parts distributors. If you have or make a list of replacement parts, please feel free to add them by copying the relevant table from EditorsToolbox:Tables

This device is in the WorkNeeded:General category because it was flagged as missing general information about the device. The information may be incomplete, using default text, or inaccurate and should be verified with external sources if possible. If you can add or correct information on this page, please feel free to edit it and do so.

Macintosh Classic

Preliminary Information
Release Year	1990
Leak Risk	Medium-High
Batteries	Lithium 3,5v
Mounting Technology	Through Hole, SMD, BGA, Sockets
Capacitor Types	Aluminum Electrolytic
Destructive Entry	No
Hardware Specifications
CPU	MC68000
Memory Capacity	1-2MB
Storage	3,5in Floppy Drive, 40MB HDD IDE
Display Interface	Proprietary

The Macintoshes Classic marked the decline and eventual end of the compact Macs. It was sold from 1990 to 1992 as the low end of the Mac lineup. It ran on an 8 MHz Motorola 68000 processor, which was remarkably slower than its contemporaries, but kept its appeal as the first Mac less than $1000.

Known Issues

Leaky Battery

Cause

• Age: Old batteries tend to go bad. The ones in the Mac Classic like to also leak and corode the motherboard, sometimes beyond repair.

Solutions

• First remove the battery (or what's left of it). Then try to neutralise the acid with something like soda. Clean the Board as good as you can. You might be lucky and get away with minor repairs like replacing a few components. There's a big possibility though that traces are damaged. In that case try to rewire them as good as you can with some external thin wires.

Leaky Capacitors

Cause

• Also age: Capacitors go bad just like batteries. Eventually they will leak all over your board.

Solution

• Try to clean the board as good as you can from the electrolyte. Then remove the capacitors one by one and clean again (A toothbrush and some isopropyl alkohol are pretty useful. For me, water and soap work better but hard water can leave behind awful stains which may also be conductive). Replace the damaged components that may be around and capacitors. All you have to do now is test it.

Disassembly Notes

Warnings or tips to disassemble the device

Original Parts

Basic PCB Name

Apple Macintosh Analog Board 630-0525 Rev B 120V

Note model numbers and board revisions here

Capacitor Specifications and Footprint Information

RefDes	Qty	Capacitance	Voltage	Mount	Diameter/Size	Height	Lead Spacing	Temp	Type	Brand	Series
???	7	47 µF	16V	SMD	6,4mm	4,65mm	???	0 °C	Polymer Capacitors	J2	???

Replacement Parts

Basic PCB Name

Capacitors

RefDes	Qty	Compatible Part Number	Order Links
	7	875105344006 / HV1V476M0605PZ	Digikey Mouser LCSC

If parts are not available or different selection is preferred, you can use the values in the Original Parts section to perform a parametric search.

Kits

• Digikey BOM: https://www.digikey.com/

Related Links

• Videos or other things that might be helpful to check out