UPDATE (to CCFL-LED Conversion wiring question)

[Sledge Fingerhammers]

If at first you don't succeed....keep on looking. And looking...and looking. Plus a little Google Translate...

Following these links for info on a Delta DAC 19M005/19M009:



http://translate.google.com/translat...D8&prev=search

https://cdn.badcaps-static.com/pdfs/...d7f0a99bf3.pdf

What I end up with is:

(My original numbering was wrong)

CN5:
1: Audio Out L+ | 2: Audio Out L-
3: Audio Out R+ | 4: Audio Out R-
5: Shutdown | 6: Audio Mute
7: Volume Adj | 8: +13.8v
9: +5v | 10: +5v
11: ???* | 12: Gnd
13: Gnd | 14: Gnd
15: Inverter On | 16: Dim

* from various sources, it's "+5v AU", "DET", "AUD EDT", and I have no clue what they mean. "Audio Detect" is the only thing that sounds like it makes sense, but it's not necessarily right.

Anyway, I'll wire the LED strip driver to 8, 14, 15 & 16, and see what happens. If it blows up in my face, I'll be sure to report that here, as soon as I get out of the hospital...

[stj]

Re: UPDATE (to CCFL-LED Conversion wiring question)

test it before you fit the strips into the panel.

i had a bad one once where the wires had been fitted the wrong way from the strips - easy to fix but best to test before you totally assemble it.

and you need to disable the invertor.
i would remove the 2 8pin fets, the transformer and the controller ic on the other side of the board.
along wih the 4 blue caps and the tube sockets.
then fit the led board in the space with foam tape.

edit: after looking at the pdf, you can leave the chip in place, it does not send error info.
but you should pull the fets & transformer.

[stj]

Re: UPDATE (to CCFL-LED Conversion wiring question)

actually, dont use the 13.8v, you could damage the psu.
use the 19v after the fuse F200
that is the backlight supply.

[Sledge Fingerhammers]

Re: UPDATE (to CCFL-LED Conversion wiring question)

Thanks for the headsup, stj. Got all that real estate cleared, went to test for voltages and got 169 at the big cap, 14.1 for 13.8, 22.4 at F200, and zero for 5v. Maybe I shorted something with my sloppy desoldering and blew F101. Got a new fuse on order, and I'll clean things up, inspect it under magnification, then try again.

Incidentally, my board is a 19m009, which is very much like the 19M005/8/10, but they all have their little differences. Any idea if the controller IC can still stay, or should I just go ahead and take it out?

[budm]

Re: UPDATE (to CCFL-LED Conversion wiring question)

Just remove the power MOSFETs that drive the Inverter transformer.

[stj]

Re: UPDATE (to CCFL-LED Conversion wiring question)

yea, pull the mosfets, and i'd pull the transformer , blue ceramics and tube sockets just to clear the area.
then you can stick the new invertor there with tape.

you dont need to pull the controller because it does not send any error codes back.
some tv's / monitors do - but this one doesnt.

[JonathanAnon]

Re: UPDATE (to CCFL-LED Conversion wiring question)

Hi guys,

sorry for digging up this thread. I have a TV at home with 22 inch CCFLs, two of which are broken, so i was gonna try and replace with LED strips. Here's what I'm thinking at the moment:

1. Pull out the pico fuse to prevent the 12V being fed to the inverter circuit. (Might take out the MOSFETs and transformer just to be sure, but pulling the pico should be enough).
2. At that 12V, take a 12V feed to my LED strips. The 12V at the secondary stage is already regulated, I just need to make sure I dont pull too much current through that particular rail.
3. Connect the BL_ON to the base of a MOSFET, which will be used to switch the ground for the LEDs, and switch them on and off. I dont care about dimming them.

I know I'm brief on details here but does this sound okay?

thanks,
J

[stj]

Re: UPDATE (to CCFL-LED Conversion wiring question)

the led driver has a logic input for BL_ON, you dont need a mosfet.

[JonathanAnon]

Re: UPDATE (to CCFL-LED Conversion wiring question)

Hey,

I was gonna try it without the driver board and hook the LEDs directly to the 12V (that normally feeds the inverter board). Just thinking about it, I'm probably better off using a driver, otherwise I'd have to set up limiting resistors.

[stj]

Re: UPDATE (to CCFL-LED Conversion wiring question)

bang!

where are you gonna find slim strips without the current-regulated convertor anyway?

[JonathanAnon]

Re: UPDATE (to CCFL-LED Conversion wiring question)

Well I was just thinking about trying different configurations of these types of LED strips. They have the LED built in. I dont see how it goes bang, though, the SMPS should regulate the voltage for the 12V rail, and then resistor for each LED limits the current, and as long as I dont pull more current from the rail that it can handle it should be okay, no?

http://www.lck-led.com/images/P6180789.JPG

I'm thinking that I will have to do some sort of improvisation, as I will not be able to find an LED strip that is the exact length and fit for the panel.

[stj]

Re: UPDATE (to CCFL-LED Conversion wiring question)

those are too wide and too far apart.

[JonathanAnon]

Re: UPDATE (to CCFL-LED Conversion wiring question)

Yeah, I havent fully thought that part through, other than there will be a strip of LEDs fitted in the place of the CCFL. I need to do a bit of work on sourcing a strip of LEDs of the right colour and size. I'll see what's available, but like I said above, it's unlikely that there will be 22 inch strips so I will have to do some improvisation.

[stj]

Re: UPDATE (to CCFL-LED Conversion wiring question)

there are 22" strips - infact i'v seen them sold upto 24"

[JonathanAnon]

Re: UPDATE (to CCFL-LED Conversion wiring question)

Yeah, you might be right. I'm in Ireland so I'm not sure there will be a local supplier, but I could get one from the UK. Not much point in reinventing the wheel by trying to make one up myself. Waste of time.

http://www.ebay.ie/itm/490mm-LED-Bac...-/141818678470