..... what kind of controllerchip is on the panel, like a SED1335 etc. this is actually the most important thing to know.
Rgds,
Stef.
from a source
EG7502 = SED1360(LCD Controller) + SCI7500(Power Supply) + SED1580 / SED1751 (XY-driver)
from the module, i just can see SCI7500
EG7502 (L1F90003P) have 22 pin, there is on net datasheet for EG7500, and EG7504, but, its seem quite difference, and i am too afraid, to do some experiment to hack its lcd (.. mean guessing it pinout, regarding EG7500 & EG7504)