Super Nintendo Capacitor Replacement Guide
Replacing the electrolytic capacitors in a Super Nintendo (SNES) restores power stability, reduces video/audio noise, and prevents long-term board damage from leakage. While SNES capacitors rarely fail as spectacularly as in some earlier consoles, most units are now 30+ years old and original SMD electrolytics are at or beyond their design life—especially in humid climates.
🔍 Visual Inspection & Failure Signs
- Leaking SMD cans – clear or brown residue, especially under or around surface-mount capacitors.
- Corrosion or green/black pads – capacitor electrolyte is conductive and corrosive, often damaging traces.
- Noisy audio / humming – dried-out audio rail capacitors cause background buzz or distortion.
- Video artifacts – unstable or faded video may be caused by failed decoupling or coupling capacitors.
- Random resets / power loss – main power filter caps with high ESR can cause intermittent operation.
If any capacitor shows signs of failure, it is strongly recommended to replace all electrolytic capacitors on the board.
📋 Super Nintendo Capacitor Lists
The SNES was produced in several board revisions. Always verify your board model and cross-check silkscreen references before ordering parts.
🖥️ SNES “1CHIP” & “SNS-CPU-GPM-02” (Typical Surface-Mount)
| Board Ref | Capacitance | Voltage | Purpose / Rail |
|---|---|---|---|
| C59 | 1000 µF | 16 V | Main +5 V input filter (power smoothing) |
| C58 | 470 µF | 16 V | Secondary +5 V filter (regulator output) |
| C60 | 220 µF | 10 V | Audio rail filter (prevents hum) |
| C61 | 10 µF | 16 V | Reset circuit (power-on reset timing) |
| C62 | 10 µF | 16 V | Video encoder decoupling |
| C63 | 10 µF | 16 V | Video encoder decoupling |
| C64 | 10 µF | 16 V | Video encoder decoupling |
| C65 | 10 µF | 16 V | Video encoder decoupling |
| C66 | 1 µF | 50 V | Audio output coupling (DC block) |
| C67 | 1 µF | 50 V | Audio output coupling (DC block) |
Note: Some revisions use through-hole capacitors for C59/C58. Always check your board.
🛠️ Replacement Tips
- Polarity matters! – SMD and through-hole electrolytics are polarized; match the negative stripe to the board marking.
- Clean thoroughly – Remove all old electrolyte with isopropyl alcohol and a soft brush before installing new capacitors.
- Use quality parts – Choose reputable brands (Nichicon, Panasonic, Rubycon) rated for 105°C and equal or higher voltage.
- Consider solid polymer – For SMD locations, solid polymer capacitors are a durable, leak-proof upgrade.