My super modified Sony PlayStation 1, part III

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% Leah Rowe % 17 August 2019

MM3 stealth modchip, dual oscillators for PAL/NTSC, clean csync and more! I ditched the scph-1002 playstation that I had in the previous article, and I instead started using an SCPH-5552 model. This is superior to 1002 due to the improved positioning of the CD drive (less heat damage / RFI from the PSU) and the CD drive circuitry has auto biasing which results in less disc read errors.

I’ll get right down to business. Watch this video and then look at the pics below to see what I did to this unit:

This is an improved version of the previous mod

Alternatively, a direct link to the video is as follows: https://av.vimuser.org/ps1/ps1.webm

If you’d like me to modify your console (I can mod anything), send me an email!

Here are pictures:

MM3 stealth modchip. Allows CD-R and import games to boot:

Dual oscillator mod for PAL / NTSC crystal clocks. This allows the correct vsync speeds for european and american/japanese games:

Red LED installed and connected to laser assembly power rail, so that it flashes during disc reads:

Composite sync modification: composite video line replaced with attenuated 75 ohm csync. Pin 156 of the GPU outputs 3V TTL csync. I connect a 510 ohm resistor and 220uF 4V cap in series to the composite video line. PS1 normally uses composite video for sync when using RGB SCART. This mod results in superior video quality on the RGB output:

Temporary composite video output. I removed this afterwards; I only needed it when testing colour output on PAL/NTSC games (otherwise RGB works fine):

Sexy!

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Workers of the world, unite! You have nothing to lose but your chains.
Workers of the world, unite! You have nothing to lose but your chains.
Workers of the world, unite! You have nothing to lose but your chains.
Workers of the world, unite! You have nothing to lose but your chains.
Workers of the world, unite! You have nothing to lose but your chains.
Workers of the world, unite! You have nothing to lose but your chains.
Workers of the world, unite! You have nothing to lose but your chains.
Workers of the world, unite! You have nothing to lose but your chains.
Workers of the world, unite! You have nothing to lose but your chains.
Workers of the world, unite! You have nothing to lose but your chains.
Workers of the world, unite! You have nothing to lose but your chains.