Apple IIc


Apple IIc Documentation (schematics, reference manuals)
More Documentation (programmers guide)
Apple ][ Game and Disk Server – software base that streams over an audio cable
Apple Cassette Tapes
Apple 2 Online
Apple Disk Transfer
Apple IIc Technical Procedures

Check out the Apple IIc Monitor and Apple IIc Disk pages.



Revision from 1983 (820-0115-C)

Revision from 1986 (820-0180-A)

Memory Expansion Board suitable for 1986 Motherboards


Keyboard version from 1983

Keyboard version from 1986

Keyboard Switches

Power Supply Module

Early version from 1983, marked ASTEC AA7342, 699-0230-B

Version from 1986, model number AA7343A, 699-0230-B. Clearly cheaper design and manufacturing.

Floppy Disk Drive

Power Supply

Apple IIc power supply is really just a transformer with a full bridge rectifier and a big 10000uF/35V capacitor to smooth the output DC.

The power supply is a brick – the cover is glued together and it is impossible to disassemble it without damage. The best way to disassemble the power supply is to saw it into two pieces around the stitch where the two covers come together, with the following universal tool:

The 10000uF capacitor may be not common to have, there is enough space to replace it with three 3300uF capacitors (connected in parallel).

The power supply outputs a single voltage, which is described on the cover as 15V DC. It is not stabilised (stabilisation is done in an additional ASTEC module inside the computer), but pretty smooth and constant (thanks to the huge capacitor). My power supply produced actually a 25V DC output and it was ok for the computer. Additionally, on the plug there is a direct pass-through connection to the mains earth.



Model number A2M4015Z

Capacitors List




10 thoughts on “Apple IIc

  1. In SMK switches (as documented by Apple, as no SMK documentation has been recovered) the alternative colour denotes a “low-friction” switch, which is internally lubricated to help it slide smoothly on off-angle keypresses, and is used for intermediate width keys (wider than 1-unit but too narrow to use dual switches or a stabiliser wire).

    In some cases, the return key switch has a heavier spring, and this may be indicated by the switch being a different colour. (Normally this is only seen with space bar, but a few keyboards have a heavier switch under return as well.)

    This is the first time that I have seen a red hairpin spring switch — it seems to be something specific to European Apple IIc keyboards, which have a skinny vertical return key.


  2. Hi, I have one of these computers. when i call it says check the floppy drive what could be the problem? I already cleaned the lens. the disk when starting spins. greetings


    1. Hi. Most probably damaged disk or drive. Confirm the disk is fine in another machine. Then look for problems with the drive. The rotation speed may need regulating. And the head alignment.


  3. How can I and where should I move? It’s just that I don’t understand much of the subject, I just changed a trimmer for the engine’s rotation that had been tweaked and damaged. thanks.


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