cfl screen inverter 6pin to 7pin

[Romulo]

hi everyone i need help on this the ccfl screen inverter in broken on toshiba l505 laptop the inverter has 6pin and i cannot find the same replacement for this i have here available only the same size and coil but the problem is the available has 7pin it is possisble to use this to convert the 7pin to 6pin?please i need help on this please i have attached the image

[mielta]

Re: cfl screen inverter 6pin to 7pin

Hi
You can try it
By the Inverter there is one pin power (Vcc) i think 5v or 19v
another one is enable (Backlight on/off) i think 3.3v
an another one is ajustable voltage for brightness
and the last one is ground
2 Pins are not connected (nc)

[Romulo]

Re: cfl screen inverter 6pin to 7pin

thanks for the response mielta can you show me please how to convert with this the broken is 6pin and the available replacement is 7pin

[mielta]

Re: cfl screen inverter 6pin to 7pin

were the fuse is is VCC and ground you can also messure
you must check the chip on the inverter with 7pin for an datasheet
to find where is enable and Dim

[Romulo]

Re: cfl screen inverter 6pin to 7pin

i already checked the 7 pin inverter pin 1 and 2 vcc has 19v standby voltage 6 and 7 are ground when i turn on the laptop pin 3 and pin 4 have 3.3v and pin 5 have 1.2v

[mcplslg123]

Re: cfl screen inverter 6pin to 7pin

Try by shorting pin 4 & 5 of inverter and see if voltage remains 3v. Very likely you will get backlit on.

[Romulo]

Re: cfl screen inverter 6pin to 7pin

thanks mcplslg123 but the problem is 6pin inverter the ground is pin 5 and the 7pin inverter the ground is in pin6 and pin7 i need to replace the 6pin inverter to 7pin how can possibly do this please

[mcplslg123]

Re: cfl screen inverter 6pin to 7pin

19v to vcc pin
gnd to gnd
3v in pin 3 or 4
3v/1.7v on pin 4 or 5.

Technically thats the requirement for backlit to be on. You will need to apply 3v on those pins by permutation and combination to find out.

eg, vcc and gnd connected, then apply 3v on say pin3 and try putting 3/1.7v on pin 4 or 5. see which works