PS1 Modchip wiring diagram

hi guys i recently opened my ps1 because he didnt wanted to load games anymore and found modchip loose inside the housing...model number of the chip is 12C508A 04/P HBM so please if anyone knows how to solder it back please let me know

 

What model is your PS1?
That chip can have different types of programs installed with different installation diagrams, though.

 

its SCPH-9002 PAL version

 

I would assume there is an MM3 hex on the 12C508A.

Try this diagram:



But how did you find the chip loose inside the console? Are there no wires attached to it? Sounds weird.

 

wires are attached to chip but they detached form the solder somehow

 

here is the wiring that is still on the motherboard https://drive.google.com/folderview?id=0BzH4TIdFiCU8Z054NTVxVTJBRG8&usp=sharing

 

Try the MM3 diagram. Might work.



Here's a guide for the pin numbers on the chip.

Careful with point 3. If you heat the resistor too much you will knock it off the board.

 

dammit i knew it would happen i dont have good equipment my soldering iron is kinda big without temp selector... resistor on point 6 fell off and i cant find it anywhere is there any way i can order it online from ebay?

 

how many wires have the chip?

 

No promises of when but I'll be putting a modchip myself. Once I open it I'll trace the pin out for you.

 

Pretty sure point 6 is a cap and he said he's lost the cap, so you would need to remove the cap and measure it. Or check schematics, I think the 9xxx series service manual is available

 

That chip it's a classic 4 wire. This is the correct diagram
Plus link wire it's in a bad place

 

Oh my mistake. Read this as the trace got ripped up.

 

http://gamesx.com/wiki/lib/exe/fetch.php?media=schematics:service_manual_scph_9000_3rd_ed.pdf

 

So he would have to replace

Won't be stealth like that.

 

He might not care if backups are patched before hand.

But you are quite right, if you are resoldering it in anyway - may as well replace it with a stealth chip.

 

If the chip was programmed with oldcrow code (aka classic chip) it won't be magically become stealth, even if you connect the other not used 3 wires.
That's why i've posted the right diagram.

 

At this point we are assuming its MM3

 

no, i'm assuming that is a classic chip looking how it was soldered