SNES Jr RGB Mod Amp Kit Installation Instructions

Note: This kit and instructions are old and outdated. Updated Kits and instructions will be available in April of 2017.

Please take proper safety precautions when dealing with electronics and soldering. Have proper ventilation and a clean work area. Research basic soldering technique if in doubt.  I cannot be held responsible for any damages that could occur to you or your equipment while following  the procedures present on this Website.  

This Kit can be purchased from my store here

Getting Started:
- Basic soldering skills!

- SNES RGB cable. Installing this kit enables Csync.  Most users prefer Csync for best video quality
- The 4.5mm tool that opens the SNES (I sell these in my store)
- Philips head screwdriver
- Soldering iron & solder
-Small piece of electrical tape.

Read this Awesome "Soldering is Easy – Comic" for Basic 101s of soldering click here.

RGB Amp Pads Explained

Y= Luma (only active on Svideo enabled amps)
C= Chroma (only active on Svideo enabled amps)

Before doing anything unplug the consoles & turn the power switch "ON"  This will discharge the internal capacitors.
Start by removing all 4.5 bit screws from the bottom side of console.

Next Remove all visible screws from the motherboard. Make note of different screws sizes, the larger silver screws secure the game slot and rear multiport.  All other screws surround the board.

Now it is time to prep the RetroFixes RGB amp.  The back side of the board has no exposed conductive metal.  There are a few silkscreen vias that might touch the motherboard.  To insure 110% reliability I prefer adding a piece of electrical tape to the section shown in the photo.

Locate these areas on bottom of motherboard.

Next place the RetroFixes RGB Amp over the multi-out pins. Make sure it slides over all the pins. Special Note:  1 out 25 SNES consoles (my experience) come from the factory with the two ground pins soldered together.  If your console has this extra solder remove it before placing the amp into place. You can either snip the solder away with snipers or remove the solder with a desoldering hand pump.

Next, solder the following pins on the RetroFixes Amp.  Not all pins are active therefor only a few required soldering.  Simply solder all the 12 pins down, for now (until page is updated)

Next, locate this spot on the motherboard:
This location is very important, study it closely before soldering. Red , Green, Blue here.

Update: Scroll to the very bottom of this page for new installation options.  Some prefer using additional 1.2k resistors with this kit.

Measure and cut the wires to proper length and solder them to the corresponding pads on the Amp. Most prefer to strip the wire and slightly twist the strands. Next add a small amount of solder to wire tip. This is called "tinning" your wire. Very important step and makes you installation cleaner and more reliable.

Don't add large amounts of solder to the pads. Honestly I have a bit too much shown in the photo below.  I was testing prototypes are not aiming for perfection.

For Csync and or Svideo install:

Locate the SNES  "S-RGB" chip located on top near the Heat-shield.  Removing the Heat-shield is necessary and it is held down with 3 screws.

Locate IC Pins 12, 17 & 18 on the chip. Use the photo as a guide.  
Pin 18 = Csync
Pin17 = Y
Pin 12 = C

Soldering wires to these small IC legs requires some skill.  Add a small amount of solder to the legs and wire before trying to solder into place.  Once soldered follow the wiring location path below.  The wires will go around and under the motherboard.

Thread wires through this hole. Cut to correct length and then solder the amp.

Don't add large amounts of solder to the pads. Honestly I have a bit too much shown in the photo below.  I was testing prototypes are not aiming for perfection. 

Updates in the world of SNES Jr RGB Modding.
Some users have found the RGB video too bright. If you wish to decrease the brightness the adjustment is very simple.   - Solder three 1.2k Ohm resistors from the R,G,B location on the motherboard. The other end of the resistors solders to ground. Make sure to use heatshrink tubing to shield the resistors legs.  You can view pictures below from RetroRGB:

Photo will be added in the near future.


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