I downloaded the pdf (http://support.fender.com/service_diagr ... A_SISD.pdf
) for the American Deluxe Jazz bass - there are quite a few diagrams but this one shows the most detail of the smd board used.
It is similar to the MIJ precision light preamp as traced by lietuvis BUT not the same
I have no idea what value the components are, but from what i have deduced by tracing it from the picture in the pdf, it has a non inverting gain stage for the first section NOT a buffer.
There are also limiting resistors fitted at the cw and ccw ends of all three tone pots - the tone pots are all 100k linear though.
There is an additional capacitor fitted in series with resistor connected to the wiper of the bass control and an additional resistor fitted in series with the capacitor connected to the mid control pot wiper -there is also an additional capacitor connected between the ends of the limiting resistors on the treble pot (like the bass control).
The protection diode in series with the +9v (looks like +18v on the Fender pdf) feeds the voltage divider biasing network only - the +ve supply is connected directly to pin 8 of the opamp (not through the diode).
The output level control is 25k log not 100k.
The treble and bass controls are a dual concentric 100k linear pot.
The midrange is a single 100k linear pot.
The pan control is a dual ganged 250k linear pot.
It seems that this circuit has increased gain - always handy for those that want to overload the input to their amplifier, the limiting resistors are probably there to prevent harsh clipping of the LF422 dual opamp when full boost on the tone controls is used.
Hope this useful - would love to know the values