Super Nintendo Console Guide
(SNS-001 & SNS-101 “SNES Jr”)
🔍 What Is the Super Nintendo Entertainment System?
The Super Nintendo Entertainment System (SNES) is Nintendo’s 16-bit home console released in North America in 1991. Known for its clean color palette, iconic sound chip (SPC700), and legendary library—Super Mario World, A Link to the Past, Super Metroid, Chrono Trigger—the system remains one of the most collectible and repair-friendly consoles of the retro era.
Throughout its production lifespan, Nintendo released several internal revisions that impact picture quality, motherboard layout, and modding potential. This guide explains each version, how to identify them, and what to expect when buying, restoring, or collecting a Super Nintendo.
🆔 Identifying Your SNES Model
The SNES has two major body variants:
SNS-001 – “Classic SNES”
This is the classic unit most people recognize:
• Purple power/reset buttons
• Top-loading cartridge slot
• RF + Composite A/V output
SNS-101 – “SNES Jr / Mini SNES”
Released in 1997 as a cost-reduced redesign:
• Smaller, rounded shell
• No eject lever
• Composite output only (no RGB without mod)
🧬 SNES Hardware Revisions Explained
(These apply to the SNS-001 body style unless noted otherwise.)
Nintendo revised the motherboard several times to reduce cost and improve video quality. These revisions matter for collectors and modders.
🟣 1. SHVC (Early Revision — “Launch Era”)
Years: 1991–1993
Markings: Often labeled SHVC-CPU-01 on the board.
👍 Pros
• Very durable; excellent build quality
• Compatible with all aftermarket mods
• Classic “soft” SNES color palette and noise profile
• Strong audio output with minimal filtering
👎 Cons
• Slightly softer video quality compared to later 1-CHIP
• Older units may have aging capacitors and yellowing shells
• Heavier and more complex motherboard layout
🔵 2. APU Revisions (Mid-Era Boards)
Years: 1993–1995
Names: Boards commonly labeled SNS-CPU-APU-01/02.
These revisions moved the audio subsystem onto a small daughterboard or redesigned layout.
👍 Pros
• Improved manufacturing stability and easier servicing
• Cleaner audio with reduced background hiss
• Sharper composite video output compared to SHVC
👎 Cons
• Still not as sharp as 1-CHIP revisions
• Slight color banding on some units
🟢 3. SNES 1-CHIP Revisions (Best Picture Quality)
Years: 1995–1997
Names: Boards labeled SNS-CPU-1CHIP-01, 02, 03.
The CPU, PPU1, and PPU2 were merged into a single chip, dramatically improving clarity.
👍 Pros
• Best picture quality of any SNES hardware
• Razor-sharp RGB output rivaling modern FPGA systems
• Ideal for collectors, streamers, and RGB mod users
• Least analog noise across all revisions
👎 Cons
• Slight color accuracy differences compared to SHVC
• Early 1-CHIP units sometimes show faint “ghosting” in bright areas
• Most sought-after → higher prices on the secondary market
🟡 SNS-101 “SNES Jr / Mini SNES”
The SNES Jr (SNS-101) is a compact redesign released in 1997.
Characteristics
• No RGB output from the factory
• Uses a simplified motherboard
• Extremely reliable—fewer components and fewer points of failure
• Bright, clean composite video output
👍 Pros
• Often outputs picture quality very close to 1-CHIP
• Lightweight and compact
• Newest production models → less yellowing and fewer failures
• Great for casual players
👎 Cons
• No RGB without modding (but RGB mod is easy and popular)
• Missing power LED
• Case plastics scratch more easily
Who Should Buy a SNES Jr?
• Players wanting the simplest, cleanest composite picture
• Collectors who prefer the compact aesthetic
• Modders who want a small RGB powerhouse after a quick board mod
🔧 Maintenance & Repair Notes
Common Restoration Tasks
• Deep cleaning cartridge slot and controller ports
• Re-flowing AV connector joints
• Replacing yellowed or brittle shells
• Capacitor replacements (more important on early SHVC units)
• Replacing worn rubber controller membranes
• Cleaning RF shielding and power jack contacts
High-Value Mods
• RGB + csync mod on SNES 1-Chip and SNES Jr
• Edge-enhancer Mod fpr SNES SHVC and APU Board revisions
• Region-free mod (CIC disable)
• DeJitter mods for OSSC/Retrotink compatibility
• LED power indicator for SNES Jr
⚠️ Common Issues to Watch For
1. Yellowing / Two-Tone Plastics
• Caused by bromine and UV exposure
• Some SNES shells yellow unevenly (top vs bottom)
• Treatable with RetroBright or shell replacement
2. Vertical Lines / Jailbars
• Common on early SHVC boards
• Can be improved with recap or bypass mods
3. Flickering / Scrolling Lines
• Often caused by failing capacitors or a bad A/V cable
• Can also be caused by noisy voltage regulator output
4. No Power / Intermittent Power
• Failed power jack solder joints
• Bad power brick
• Broken or cracked power connector
5. Audio Buzz / Hum
• Older capacitors
• Poor grounding in aftermarket AV cables
6. No Video / Black Screen
• Often caused by bad CPU or PPU
• Failed CPU can cause black screen / no audio
• Lifted or bridged CPU legs can cause scrambled video
• Damaged traces or corrosion may also cause failure
• Testing is needed to confirm the cause
💡 Buying Tips for Collectors & Players
For the Best Video Quality
✔ SNES 1-CHIP SNS-001
✔ SNES Jr (RGB-modded)
For the Most Authentic 1991 Experience
✔ SHVC early models
✔ OEM controllers only (better D-pad + rubber quality)
✔ Vintage CRT Television
For the Lowest Maintenance
✔ SNES Jr
✔ Late-run 1-CHIP boards
For Budget Buyers
✔ APU revisions (excellent balance of clarity and price)
❓ Which SNES revision has the best RGB video?
The 1-CHIP boards have the sharpest RGB output available from real hardware.
❓ Is the SNES Jr worse because it lacks RGB?
Not at all. Its composite output is excellent, and once modded, it can surpass most SNS-001 units.
❓ Do all SNES units need new capacitors?
Only early SHVC units consistently show aging caps. Later boards are usually stable but may still benefit from preventive replacement.
❓ How do I know if my SNES is 1-CHIP?
The only reliable way is to open the console. Exterior serial numbers are not 100% accurate.
🚀 Need Expert Restoration or RGB Modding?
Retro Regen professionally restores, cleans, and repairs original Super Nintendo consoles.
From deep cleaning to cap kits to RGB upgrades, your console is treated with collector-grade care.
👉 Visit our SNES service options
👉 Browse restored SNES consoles in the eBay shop
