dell e176fpf ena pin

[hazim]

hi

in want to install a new inverter (back light) board to this board

but i cant identify ENA (ON - OFF ) PIN IN THIS BOARD to connect wire on it

can you help me

[budm]

Re: dell e176fpf ena pin

Can we see the pictures of the bottom side of the board?

[hazim]

Re: dell e176fpf ena pin

[budm]

Re: dell e176fpf ena pin

The pictures of your Bottom side of the board you have DO NOT match the picture of the top side of the board you have shown in post #1, they are not the same board!
You need to show us YOUR board not the picture of someone else board.
There will two control lines (BL-ON, Dim) that go to the Inverter section from the logic section.

[hazim]

Re: dell e176fpf ena pin

i'm so sorry my dear

but i take this picture form net it's wrong from me

this is picture

please show me bl-on and dim on picture

thank you very much dear

[budm]

Re: dell e176fpf ena pin

Man! the pictures are not in focus at all, I cannot read anything on the board.
BTW, are you sure this is Dell e176fpf, NOT E173FPF?
I only see this board used in the E173FPF.
The P/N as printed on the bottom side of the board is 490271200101 or 490271200100 , the number as printed on the top side of the board is 790271200800?
Can we see the sticker on the back on the back of the monitor that shows model number and the revision number?
BTW, what is the P/N as printed on top of the IC U1 in the inverter section?

Please look at the attached pictures to see if it matches YOUR board or not.
Pictures provided by shopjimmy.

[hazim]

Re: dell e176fpf ena pin

first i want to thank you so much

this is my boards

U1 OZ9RRAG

i see all numbers on it

bottom side no 490271200101

top side no 790271200800


the sticker on the back on the back of the monitor (damaged) so i suggest this is dell e176fpf

but now i believe you dear that is dell e173fpf


i'm sorry for this mistakes

and thank you again very much you'r very good man

[budm]

Re: dell e176fpf ena pin

So your board matched the pictures I post in my post #6. If they are then I believe I can see the two control lines that go to the Inverter section.

[budm]

Re: dell e176fpf ena pin

Check the DC Voltage at point 'A' with ref. to GND and point 'B' with ref. to GND when monitor is OFF and when the monitor is turned ON.
Report the results.

[hazim]

Re: dell e176fpf ena pin

my dear budm

point a 1.8 v even off monitor or on

point b 3.3 even off monitor or on

but i'm under stand what do you want

we search the point that when on monitor volt appear on it

and when off monitor volt dont appear on it

and i search for all point in board and i found that tow point in the bottom of board beside key connector C and D lock at picture please




point C 3.3 volt when on ----- dont appear when off

poit D 2.02 volt when on -------- when off goes to 0.02 volt

is point C BL -ON ??????? and point D dim ????

i'm sorry my camera is not good

thanksssss

[budm]

Re: dell e176fpf ena pin

OK, that IC U1 OZ9RRAG is the inverter control IC, pin 1 is the ENA pin so all you have to do is to trace out where pin 1 goes to which will be your control pin.
You can check pin 1 of the IC when monitor is OFF and when Monitor is ON.
There is also spec sheet for the IC and it also has application circuit on how to use the IC. The ENA pin is active LO, as you can see, 0~1V = ENA, 3~5 = Disable, that is why in the circuit it has Q2 as an inverter for the control signal so it is set to Active HI.
It helps a lot to be able to get the P/N and the spec of the IC.

[hazim]

Re: dell e176fpf ena pin

i checked pin 1 in IC U1 OZ9RRAG

it has 0 volt even off or on monitor

i'll try to connect wire to pin C that i refer for it in my picture

and tell you what's done

thank you

[Fuzer]

Re: dell e176fpf ena pin

I there

I know this post is old but does someone can post the schematics of this board?

Or maybe give the values of the following componentes:
R856= ???
R861=47 ohm ????

Compliments