Recap guide
Recap the Atari 7800
Only a few electrolytics. Owners argue about whether recapping a working unit is needed, though one example had a slightly leaked cap.
Open the interactive checklist Tick off each capacitor as you replace it. It saves in your browser.
Check first. A recap is not always the answer here, so look at the guides before you order parts.
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.
- C025233-001 (NTSC, 1984-1986) (Medium confidence). How to tell: Original NTSC board with the unused expansion port. Capacitors: No cap difference documented. Capacitor list differs from other revisions: not known. Source
- C025233-002 (NTSC, 1986-1992) (Low confidence). How to tell: Revised NTSC board with a timing circuit for 2600 compatibility; most expansion-port-less consoles use it, and the timing circuit later stopped being populated. Capacitors: No cap difference documented; an AtariAge thread says only three electrolytics need replacing on a 7800, without naming the board. Capacitor list differs from other revisions: not known. Source
- C300633-001 (PAL, 1989-1993) (Low confidence). How to tell: PAL board with green power LED and a different faceplate; French variant has a 13-pin DIN RGB connector. Capacitors: No cap information; one page notes PAL units had at least two different 240V power pack designs. 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.
- To recap or not (Low confidence). One thread notes three electrolytics worth replacing and one that leaked slightly, and has a fair debate on recapping at all. It also warns that a 2600 PSU is too weak for a 7800. 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: Which parts besides the three electrolytics (Low confidence). In the same recap thread, posters suggested swapping silver polystyrene caps of 820pF for MLCC ceramics and the green film caps for new film caps, while another said the green parts on the paddle inputs have no known failures. Several posters warned against replacing parts just because they are old, since it risks damage. Source
Before you start
- Boards changed during production. Check your board number against the guides before you order parts.
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.
- 7800 recap/refresh (Forum) by MooseHead (AtariAge). Recap plus PSU/regulator and composite mod with a fair debate on whether to recap at all. Mentions film and MLCC swaps; no board revisions. Warns a 2600 PSU is too weak for a 7800
- Console5 wiki: Atari 7800 (Wiki) by Console5. A community wiki page for this machine, often with board photos and capacitor lists.
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
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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.