Editing Commodore 64C Capacitor Replacement Guide (section)

== Post-Recap Voltage & Ripple Checks ==

After recapping, verify the main power rails with a multimeter or oscilloscope:

{| class="wikitable styled-table" style="width:80%; text-align:center;"
|+'''Commodore 64C Power Rails (No Cartridge, BASIC READY)'''
! Test Point !! Expected Voltage !! Max Ripple (p-p)
|-
| +5 V (PLA pin 24) || 4.95 – 5.10 V || < 50 mV
|-
| +9 V (SID 8580 pin 28) || 8.7 – 9.3 V || < 100 mV
|-
| 9 VAC (user port pins 10/11) || 8.5 – 10 V rms || Sine-like
|}

''If you observe video shimmer, audio buzz, or random resets, recheck your soldering and capacitor polarity. Ripple above 100 mV on any rail indicates a possible fault.''