Take a note of the pin connections
Ensure there is no disc in the machine, flip your machine over and
remove the 6 retaining screws.
Flip your machine back the right way and lift off the top cover, remove the drive unit by gently pulling out the
ribbon cable and the small motor supply plug, lift the drive unit clear and set it in a safe place. Remove the
cable restraint and disconnect the second ribbon cable and the main power supply cable.
Remove the four phillips screws holding the plate and lift it clear, you might have to wiggle it a bit as it tends
to hang on the locating pins.
To lift the mainboard from the case you need to remove (2) more screws. This is not totally necessary but is recommendeded if you are new to soldering.
And here are the solder points, note that only pins 1, 2, 4, 5, 6, 7 & 8 on the mod-chip are soldered and a link soldered
between the two other points on the mother board as in the next picture.
And finally the color modification to play NTSC in Color
Ensure the modchip can not come into contact with the circuit board. Double sided tape can be used to mount the chip so that it does not move around inside the console. Reassemble the console using the above instructions in reverse order
NOW ENJOY YOUR GAME TIME