пятница, 24 марта 2017 г.

Fixing LVDS Cables for CCFL LCD Screens



CCFL inverter pinout (M662)

On the inverter port, when looking from the cable side, from left to right, numbering from 1 to 6, the pins are connected with the following colors of wires:

1 - green
2 - yellow
3 - black
4 - orange
5 - brown
6 - red

According to my testing, the function of pins is as follows

1 : + (19/12 V)
2 : + (19/12 V)
3 : on switch (inverter activates at > cca 1.8V)
4 : brightness (0V = low brightness; higher voltage gives higher brightness)
5 : GND
6 : GND

Pins 1&2 and 5&6 seem to be Излишне connected, supplying power.

The notebook is broken so I couldn't watch pins 3 and 4 in use, but from testing, it seems they are control pins. I don't know exactly how they should be used, but the inverter doesn't start without voltage on pin 3. Applying 3.3V to pins 3&4 seems to make the panel shine nice and bright. I don't know if they are PWM, voltage controlled, or what is