Editing Atari 800 Capacitor Replacement Guide (section)

== Post-Recap Voltage & Ripple Check ==

After reassembly, verify all voltage rails under load (computer powered, BASIC READY):

{| class="wikitable styled-table" style="width:80%; text-align:center;"
|+'''Atari 800 Voltage Rails (measured at mainboard test points)'''
! Test Point !! Expected Voltage !! Max Ripple (p-p)
|-
| +5 V (CPU, ANTIC, GTIA) || 4.90 – 5.15 V || < 50 mV
|-
| +12 V (POKEY, audio, video) || 11.5 – 12.5 V || < 100 mV
|-
| +9 V (unregulated, after rectifier) || 8.5 – 10.5 V || sine-like
|}

''Excessive ripple or voltages out of range may indicate a failing external PSU or regulator fault.''