PS1/2 Help PS2 modchip recognition with disconnected points and cd/blue dvd not read correlation

[moriljn1]

Hello everyone, I need help understanding how a modchip works, to be precise it is branded Matrix Infinity 1.93, as shown in the attached images. When disassembling my Ps2 50004 I noticed that there are 2 unsoldered points, the ones that go on the back (those between the pliers in the picture), are points I and H of the modchip. The console reads all the original and burned game and movie DVDs without any problems, but it does not read the original and burned CDs or even the blue CD discs of the original PS2 games. I was wondering if it is related to the fact of the unsoldered points. Can anyone tell me if the I and H points of the modchip are important? I don't know if they came off or were intentionally kept off by whoever made the mod. Does anyone have information on this chip? It does not save the settings even if it says save done, on restart they remain the same, maybe it is a clone or maybe it is always related to the fact of the 2 unsoldered points? I am looking for clarifications on this matter from the most expert in the field, thanks!

 

[SylverReZ]

Does anyone have information on this chip?

This is a clone of the Matrix Infinity chip called the "Matrix v1.93" which just so happens to be a clone-of-a-clone called the Modbo 735 from 2005/06.

It does not save the settings even if it says save done, on restart they remain the same.

The manufacturer of these chips flashes the firmware incorrectly by write protecting the SPI flash, which prevents you from saving the chip's configuration, unless you desolder the flash chip and program a new one.

The ones that go on the back (those between the pliers in the picture), are points I and H of the modchip. The console reads all the original and burned game and movie DVDs without any problems, but it does not read the original and burned CDs or even the blue CD discs of the original PS2 games.

Yes, they are very important for the CDVD controller to know what media type is inserted into the drive. And without those points connected, then in your case, it does not recognize burned CDs or original media.

 

[moriljn1]

This is a clone of the Matrix Infinity chip called the "Matrix v1.93" which just so happens to be a clone-of-a-clone called the Modbo 735 from 2005/06.

The manufacturer of these chips flashes the firmware incorrectly by write protecting the SPI flash, which prevents you from saving the chip's configuration, unless you desolder the flash chip and program a new one.



Yes, they are very important for the CDVD controller to know what media type is inserted into the drive. And without those points connected, then in your case, it does not recognize burned CDs or original media.

Thank you for the accurate answer. I soldered those 2 points and now it doesn't read any type of disc. I would like to be sure that I didn't damage the laser during the cleaning of the lens, even if it was superficial and light, or damaged the laser flats. Now I’m doing various tests with flats recovered from another ps2 before trying to unsolder those 2 points again. In the meantime I wanted to understand if I soldered those 2 points in the correct places. I haven't been able to find an installation diagram of the Modbo 735 to follow the correct soldering points of my clone on my 5000 (GH-023). Could you direct me?

 

[SylverReZ]

I haven't been able to find an installation diagram of the Modbo 735 to follow the correct soldering points of my clone on my 5000 (GH-023). Could you direct me?

The installation is about the same as every Modbo chip. GH-023 is version 9.