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Recap guide

Recap the Apple IIc power converter

The IIc's Astec AA7341B converter has eight electrolytics that are known to fail, and a documented teardown includes a part table.

Open the interactive checklist Tick off each capacitor as you replace it. It saves in your browser.

Worth a recap. Reports say it is a common and useful fix on this machine.

Which board do I have?

Boards changed during production. These notes come from the linked sources, and many are only partly documented, so check the board in front of you.

  • IIc Astec AA7341B (Apple 699-0230) (Medium confidence). How to tell: Part marking on converter. Capacitors: 8 electrolytics: C3 3300uF 35V, C6 1uF 50V, C9 330uF 16V, C10 1000uF 16V, C11 330uF 16V, C16 220uF 16V, C17 1000uF 10V, C18 33uF 35V, plus a 1000uF 25V outside the case. Capacitor list differs from other revisions: yes. Source
  • IIc Plus Sony CR-60 (Low confidence). How to tell: IIc Plus supply. Capacitors: No RIFA type caps in it. Capacitor list differs from other revisions: not known. Source

Where to start

Clues from write-ups and forum threads, not a diagnosis. Low confidence means one thread or one repair; high means several write-ups agree.

  • Eight converter caps (Medium confidence). One thread tears down the converter and tabulates all eight caps with suggested replacements. Source

Tips, tales and maybes

Found in write-ups and forum threads. These are other people's reports, not tested by us. Check part references and values against your own board.

  • Tip: Leave a working IIc supply alone (Medium confidence). Posters say the IIc brick is a simple analog supply with overvoltage crowbar and current protection, so if it works leave it. If you open it anyway, replace the RIFA cap as preventive work and look for bulged electrolytics. Source
  • Tip: Opening the IIc converter, and model check (Medium confidence). The thread covers the Astec AA7341B (Apple 699-0230), whose metal case is effectively welded shut, so the assembly is slid out by pulling the outer casing with pliers. It says the original caps were good quality and may not need replacing if there is no leakage, and that other IIc supplies differ. Source

Before you start

  • Boards changed during production. Check your board number against the guides before you order parts.
  • A mains power supply can hold a dangerous charge. If you are not trained to work on one, have a professional do it.

Guides we used

This page and the interactive bench are built from these. They have the photos and the full detail, so please read them and support their authors.

The capacitor list

We have not checked a capacitor list for this machine yet, so none is shown. Follow the guide above for your board, then add the capacitors in the interactive checklist and it builds a shopping list for you.

Skip the sourcing

While you are in there

Affiliate links. As an Amazon Associate I earn from qualifying purchases. These links only search by name. Disclosure

Steps, tools and safety

The steps, the tools in top, middle and budget picks, and the safety list are the same for every machine, so they live on one page: How to recap, step by step.

Values are shown as published in the guides above, and boards changed during production. Check the board in front of you. A recap involves hot tools and, on some machines, dangerous voltages. You do it at your own risk.

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