Sony PlayStation Dual Frequency Oscillator Install Guide

Install guide for adding a Dual Frequency Oscillator to a Sony PlayStation. The dual frequency oscillator will allow a region modified console to have a correct video clock frequency relative to the video refresh rate, rather than an out of spec one when using a forced video refresh rate.

SCPH-100X PU-8

Unconfirmed / Work in Progress

This is an underside install location which requires a DFO with a PCB thickness of 0.8mm. It might be necessary to add some tape to the RF shield to prevent the top of the 27mhz Crystal from touching the RF shield. Although this might not be necessary.

Still to add ground and 5V locations. But these should be easy to find with a multimeter.

SCPH-550X PU-18

Confirmed / Working

This is an underside install location which requires a DFO with a PCB thickness of 0.8mm. It might be necessary to add some tape to the RF shield to prevent the top of the 27mhz Crystal from touching the RF shield. Although this might not be necessary.

• Remove the resistor connecting X201 to pin 192 of the GPU. This will completely isolate the clock from the GPU ready for the DFO clock to be used instead.
• Connect DFO SO pad to Pin 157 of the GPU. This pin will change from Ground and 3.3V depending on the region of the game being run. This is used to switch the DFO's frequency .
• Connect DFO CLK OUT pad to Pin 192 of the GPU with a 220ohm resistor.

SCPH-700X PU-20

Coming Soon

SCPH-750X PU-22

Unconfirmed / Work in Progress

This is an underside install location which requires a DFO with a PCB thickness of 0.8mm. It might be necessary to add some tape to the RF shield to prevent the top of the 27mhz Crystal from touching the RF shield. Although this might not be necessary.

Still to confirm ground and 5V locations. But these should be easy to find with a multimeter.