Editing Atari 400 Capacitor Replacement Guide (section)

=== CPU and RAM cards ===

'''Neither plug-in card contains an electrolytic capacitor.''' C301–C307 on the CPU card and C501–C523 on the RAM card are all ceramic axial types.<ref name="fsm" /> If someone has sold you a "400 cap kit" containing parts for these cards, it is not a 400 kit.

The Console5 Tech Wiki capacitor list for the 400 agrees with Atari's parts list exactly — the same eight designators at the same values.<ref name="c5">[https://wiki.console5.com/wiki/Atari_400 "Atari 400"], Console5 Tech Wiki, retrieved September 2026. Secondary source; its capacitor list matches Atari's own parts list designator for designator, and it additionally identifies A201 as a 7812 and A202 as a 7805.</ref>