Disassembling and Recapping Apple IIc Internal Power Converter

[AndyDiags]

When taking apart your Apple IIc, you may want to check if the internal power converter has any leaking capacitors.
This guide helps you though the process. Note not all power supplies on the IIc are the same. This is meant of the Astec AA7341B, Apple part 699-0230, shown in images below.

First remove the power converter by pulling it up and out

The metal casing is welded shut. It's not possible to pry it open without heavily damaging it. Also note that you can not use a wick and remove the solder.

You need to slide out the power supply from the outer casing. You can do this by placing a piece of metal (such as a screw driver) though the screw hole on one end, and then pull on outer metal casing on the other end using pliers to slide it out.

After getting it out a couple inches, the rest could be pulled out using your hands, use gloves if needed. You should be able to take the rest apart to see inside.

The power supply consists of 8 electrolytic capacitors. Here's two images, one of the board, and one with the capacitors marked.

Capacitor List for the Astec AA7341B power converter:

Label	Capacitance	Voltage	Lead Spacing	Type	Diameter (Original)	Diameter (Max)	Suggested Replacement
C3	3300uF	35v	42mm	Axial	22mm	24mm	MAL202117332E3
C6	1uF	50v	2.5mm	Radial	5mm	8mm	UPV1H010MFD1TD
C9	330uF	16v	5mm	Radial	10mm	11mm	UPX1C331MPD1TD
C10	1000uF	16v	5mm	Radial	13mm	14mm	UBT1E102MHD1TO
C11	330uF	16v	5mm	Radial	10mm	11mm	UPX1C331MPD1TD
C16	220uF	16v	5mm	Radial	10mm	10mm	UPX1C221MPD
C17	1000uF	10v	5mm	Radial	13mm	13mm	UBT1E102MHD1TO
C18	33uF	35v	2.5mm	Radial	6mm	7mm	ULD1H330MED1TD

Console5 currently does not have a kit available for this. Also note that high quality capacitors were used, with no visible leaks in my unit, so you may very likely not need to replace them yet.

 

[JDW]

A 1000µF 25V capacitor located just outside the PSU should also be replaced. It is green in the photo below...

 

[JDW]

I also see that Console5 does in fact offer a recap kit for the Astec AA7341B:

Apple IIc 2c Power Supply Cap Kit: P/N 699-0230 ASTEC AA7341B

<p>This kit contains all parts necessary to replace the electrolytic capacitors in the Apple 2c power supply, ASTEC AA7341B</p> <p><em><strong>PLEASE DO NOT RELY ON THE 614 / 699-xxxx APPLE PART NUMBER!<br />OPEN AND VERIFY THE ACTUAL MANUFACTURER &

console5.com

That page provides a link to their cap-list WIKI, which explains the capacitors included in that specific cap kit:

Apple 2 - TechWiki

wiki.console5.com

That page mentions 3 different PSU's for the IIc, two of them being ASTEC brand. So it would seem prudent to check your IIc's PSU prior to purchase.

NOTE: Their WIKI mentions "C1 1000uF 16v" but the opening post by @AndyDiags calls it C10. I don't know if both are correct (different PCB revisions?) or if one is in error.

 

[AndyDiags]

I do somewhat recall the Console5 listing being different. My guess is that the capacitor covered the "0" so they thought it said C1. C1 is actually on the other side of the board.