blog:mac_iici_refurb

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Apple Mac IIci - Refurb & Capacitor Replacement

This little Mac IIci has been in my collection for a while now; it's a pretty powerful little system:

  • Daystar 68040 Accelerator (compared to the stock 68030)
  • 64MB RAM
  • Radius Powercolour 24X Video
  • Farallon Ethernet

The audio has always been a bit quiet, and I thought I should get around to replacing the capacitors in the audio section, but I recently (July 2020) turned it on, and besides needing to install a new SCSI drive (used for parts a while ago!), I couldn't get any audio out of it at all, and getting a disk recognised was a pain.

I checked the battery, and it is still okay - I replaced it around 2015, so it should last a while long. But looking at several of the caps on the board, they show signs of failing, with 'wet' around their bases:

Urgh. That job has suddenly moved up the priority list.

Model: Daystar Digital Turbo 040 (rev 3) @ 33MHz (I believe!)

A list of capacitors and ratings is available on the 68k Mac Liberation Army wiki, but I'll list them here anyway:

  • 11x* 47µF, 16v (Tantalum) * 2x 10µF, 16v (Tantalum) * 3x 470µF, 16v (Electrolytic) * 1x 220µF, 16v (Electrolytic) Some IIci boards vary, so there may be one or two less/more of the quantities listed. But those are the main ratings needed. ====== Next Steps ====== [Update July 26th 2020]** - Ordered a set of replacement capacitors and waiting for their delivery.
  • blog/mac_iici_refurb.1595877200.txt.gz
  • Last modified: 2020/07/27 20:13
  • by john