Yes I am here LOL.
I have been letting others answer more of the run of the mill questions and I have been taking
the hard ones. Here is the interface you wanted pinouts for.
The headphone jack is a shorting jack. I had always thought it was a normal shorting jack
that turns the internal sound off when your headphones are plugged in. It is NOT !
When a headphone is plugged in it sends a signal to the CPU that tells it to turn
off the internal speakers. The internal speakers are turned off in software.
What all this means is that you can plug or wire into this jack and not have any
effect on the internal speakers working or not. The jack is very easy to solder
to on the back side of the PCB if you want. It will require you to do a complete
tear down of your PSP. Plugging into the jack really would look stupid and would
be very prone to break.
I hope this helps you. If you search my posts you will see a small tutorial on how
to build a simple signal tracer. You might want to try building it and track down
why your internal speakers don't work. Remember if you use the headphone port
you are also going to have to build an amplifier to drive your new speakers also.
Also if you want to just repair it you can contact Forklord as he is very good at
repairing PSPs.
Later all.