Editing Atari 400 Capacitor Replacement Guide (section)

== How the 400 is numbered ==

Atari allocated a block of reference designators to each board, and this is the quickest way to tell whether a designator you have been given is even possible:<ref name="fsm" />

{| class="wikitable styled-table" style="width:80%;"
|+ Atari 400 reference designator blocks
! Board !! Atari assembly number !! Designators
|-
| Motherboard || CA014807 || C101–C203, R101–R185, A101–A111, Z101–Z105
|-
| Power supply PCB || CA014155 || C201–C213, R201–R203, A201–A203, S201–S203, J201–J204
|-
| CPU card || CA017173 || C301–C307, R302–R313, A301–A303, Z301–Z304
|-
| RAM card || CA014801 (8K) / CA014802 (16K) || C501–C523, Z501–Z512
|}

A capacitor list for the 400 that quotes designators below C101 is not describing this machine.