Towards the end of the SCPH-10x PSone production Sony revised the board slightly and released the PM-41 (2) board. This page covers the installation diagram for installing a Mayumi v4 chip into the PM-41 (2).
If your board has PM-41 printed on it then you should follow the PM-41 guide instead.
PM-41 (2) Mayumi v4 modchip installation diagram
Above is the installation diagram. Just match each colored pin label in the diagram with any matching colored point on the board. There is a second image of the chip in the diagram showing a good place to position the chip.
Here are some tips I have for you when you are soldering your chip into the PM-41 (2).
- Cut your wires to be as short and direct as possible.
- The high speed clock line (pin 2) needs to be especially short and carefully routed.
- Pin 3, and 6 can be tricky. Don’t push on the components with your soldering iron or they might get knocked off the board. You can use tweezers to carefully solder them back on one side at a time, the orientation doesn’t matter.
- Make sure the wire on pin 3 and 6 don’t come into contact with both sides of the component (this is especially common if you run the wire directly on top of the component).
- Don’t apply too much solder to pin 2 and pin 4 or you’ll bridge the pins on the chip.
- Placing the chip directly on top of the shorter large chip (where it is in the diagram) seems to be the ideal location.
Diagram success rate
Here’s a list of people who have successfully modded their console with this diagram. Leave a comment and I’ll add you to the list.
- William Quade (me) (I’ve used this diagram many times and haven’t had any problems with it)
This section has photos of some successful installations which you can use to get a better understanding of how everything is wired and positioned.
Here are some installations I’ve done on some SCPH-101’s: