Unknown LCD pin outs mapping related

Hi guys, a newbie here, i’m doing a project with an unknown multiplexed LCD, i don’t know any of its pins, its a 16x3 LCD with 33 pins, i’m trying to do the pins mapping but i’m not succeeding at this :/, i’ve tried several things i’m running out of ideas of how to do the mapping of the LCD pins i’m including two pictures of the LCD, one of the pictures the LCD has almost all segments displaying, any help of any kind is very much appreciated, thank you in advanced for help.

Been stuck here for three days with no clue of what to do.

Image one - http://imgur.com/1yaVGCQ turned off

Image two - http://s8.postimg.org/w588qi2dx/1269509 … 5756_o.jpg on

This Atmel document explains how you can drive these kind of LCDs. They require AC signals (alternating polarity voltages) to display a particular segment. So if the problem is that you cannot reliably get them to turn black then you are probably not applying the right signals to it.

http://www.atmel.com/Images/doc2569.pdf

and www.atmel.com/Images/doc2530.pdf