N64 RGB MODDING KITS INSTALLATION GUIDES



Some tips before starting :
- Choose a suitable place, with space and lighting!
- Take your time
- Use suitable tools, not a soldering iron too powerful with a huge tip ...
- You will find the few equipment for this installation in our tooling section


Which kit for my console?

There are 3 groups of n64 revision board. So there are 3 type of kit


Group 1
- NUS-CPU(R)-01 (= modèle FRA)

Group 2
- NUS-CPU(P)-01
- NUS-CPU(P)-02
- NUS-CPU(P)-03
- NUS-CPU(P)-03-1
- NUS-CPU-05
- NUS-CPU-05-1
- NUS-CPU-06
- NUS-CPU-07
- NUS-CPU-08
- NUS-CPU-08-1
- NUS-CPU-09
- NUS-CPU-09-1

Group 3
- NUS-CPU-01
- NUS-CPU-02
- NUS-CPU-03
- NUS-CPU-04

To determine the group of your console, it's easy, remove the top cover of the console (6 screws), the revision is written above the cart connector



I - INSTALLATION GUIDE FOR THE GROUP 1 OF N64

=> Also called official SMD mod






Only for this revision of console : NUS-CPU(R)-01 (French console only)

This kit is a bit tricky to install. The components are very small, for idea a resistor measures 1.6 x0.8 mm!
You cannot handle them by hand, you need small tweezers (we sell in the tooling section)

Installation made by our workshop:



The kit is composed of 14 components

X3 39 Ohms resistors => R41, R43, R45
X3 75 Ohms resistors => R42, R44, R46
X1 12V zener diode => D4
X3 47pF MLCC capacitors => C11, C12, C3
X3 NPN transistors type BC817 or equivalent => Q1, Q2, Q3
X1 100 Ohms resistor => R47

For the resistors and the capacitors there is no mounting direction. However for the diode there is a polarity


About  R47: This is the 4/3 display signal (12VDC) send to the scart. On other tutorials dealing with the "Official SMD RGB Mod" the value of this resistor is 10Kohms. We use a 100ohms resistor to avoid few problems we have encountered

Optional: Using the native Csync signal (recommended)
Once this change is made the console will no longer be compatible with the original composite video cable

After opening the circuit as shown in the picture below, you have to connect the Csync points together with a wire, that's all!










II - INSTALLATION GUIDE FOR THE GROUP 2 OF N64


For revisions :
- NUS-CPU(P)-01
- NUS-CPU(P)-02
- NUS-CPU(P)-03
- NUS-CPU(P)-03-1
- NUS-CPU-05
- NUS-CPU-05-1
- NUS-CPU-06
- NUS-CPU-07
- NUS-CPU-08
- NUS-CPU-08-1
- NUS-CPU-09
- NUS-CPU-09-1

Two types of installations are possible

If you have a RS5Cxx chip :





 RS5Cxxx Pin 1 -----> D0
" Pin 2 -----> D1
" Pin 3 -----> D2
" Pin 4 -----> D3
" Pin 5 -----> D4
" Pin 6 -----> D5
"Pin 7 -----> D6
" Pin 9 -----> SCI
" Pin 11 -----> CLK
" Pin 12 -----> GND



If you have a BU9906 chip :

(Warning solders quite difficult because the spacing between the chip pins is very small)



Gros plan


BU9906 Pin 1 -----> GND
" Pin 2 -----> D0
" Pin 3 -----> D1
" Pin 4 -----> D2
" Pin 5 -----> D3
" Pin 6 -----> D4
" Pin 7 -----> D5
" Pin 8 -----> D6
" Pin 10 -----> SCI

Note: If the CLK point is not present, you can use the alternative point "CLK ALT"

WIRING THE VIDEO CONNECTOR

We must return the motherboard

Cleanly cut the track at the yellow mark below (this is the old composite sync signal, which must be replaced the Csync signal)




=> Make sure that the wires are not crushed by the motherboard, when reassembling



You must now connect the corresponding points on the kit, and it's over!







III - INSTALLATION GUIDE FOR THE GROUP 3 OF N64

For revision :

- NUS-CPU-01
- NUS-CPU-02
- NUS-CPU-03
- NUS-CPU-04

To know: To improve the rendering of the image, this kit replaces the composite video sync signal in Csync (the official RCA cable will not work anymore)

Before putting the kit in place, cut the plastic pins that go beyond





Cut the track (old composite video signal replaced by Csync)




Kit location



The installation requires only 4 wires