Editing Super Famicom Maintenance Guide (section)

== Capacitor Health & Replacement ==

While SFC boards use high-quality Japanese capacitors, all electrolytics degrade with age—especially in humid climates.

=== Typical Capacitor Failures ===
* '''Audio loss, buzzing, or distortion'''
* '''Video instability, colour shift, or rolling image'''
* '''No power or random resets'''
* '''Voltage regulator instability'''

=== Capacitor List (Mainboard HVC-CPU-01 Example) ===
{| class="wikitable styled-table" style="width:80%; text-align:center;"
! Location !! Value !! Function !! Notes
|-
| C59, C60 || 220 µF / 10 V || Audio output || Replace with low-ESR
|-
| C61, C62 || 100 µF / 16 V || Video circuit || Use 105°C rated
|-
| C67 || 470 µF / 16 V || Main +5V filter || Critical for power stability
|-
| C72 || 10 µF / 16 V || Reset circuit || Small, but important
|-
| C81 || 1000 µF / 10 V || Power input smoothing || May bulge or leak
|}

''See [[Super Famicom Capacitor Replacement Guide]] for a full list by revision.''

=== Replacement Guidance ===
* Use '''Japanese 105°C low-ESR capacitors''' (e.g. Nichicon, Panasonic, Rubycon).
* Observe polarity—electrolytics are polarised.
* Clean any leaked electrolyte with IPA and neutralise corrosion with vinegar if needed.