samsung LN-S4051D diagnal lines

[nomoresonys]

Re: samsung LN-S4051D diagnal lines

quick question: could there be a bad IC on power supply, yet still get all the proper voltages at the connectors on power supply, thanks.

[nomoresonys]

Re: samsung LN-S4051D diagnal lines

3-11
3-5 Servicing Information
3-5-1 USB Download Method
1. Downloading boot code
(1) Change the boot code's file name into "boot.bin".
(2) Copy the "boot.bin" into the path "/bordeaux/us" in USB flash driver.
(3) Turn off LCD TV.
(4) Insert the USB flash driver into the service 1 jack of LCD TV.
(5) Turn on LCD TV.
(6) The banner osd "Updating SW..." is displayed.
(7) The banner osd "Completed..." is displayed when the updating is completed.
(8) Turn off and remove the USB flash driver from LCD TV
(9) Check the program version.
2. Downloading application code
(1) Change the application code's file name into "appl.rom".
(2) Copy the "appl.rom" into the path "/bordeaux/us" in USB flash driver.
(3) Turn off LCD TV.
(4) Insert the USB flash driver into the service 1 jack of LCD TV.
(5) Turn on LCD TV.
(6) The banner osd "Updating SW..." is displayed.
(7) The banner osd "Completed..." is displayed when the updating is completed.
(8) Turn off and remove the USB flash driver from LCD TV
(9) Check the program version.

[nomoresonys]

Re: samsung LN-S4051D diagnal lines

3-11
3-5 Servicing Information
3-5-1 USB Download Method
1. Downloading boot code
(1) Change the boot code's file name into "boot.bin".
(2) Copy the "boot.bin" into the path "/bordeaux/us" in USB flash driver.
(3) Turn off LCD TV.
(4) Insert the USB flash driver into the service 1 jack of LCD TV.
(5) Turn on LCD TV.
(6) The banner osd "Updating SW..." is displayed.
(7) The banner osd "Completed..." is displayed when the updating is completed.
(8) Turn off and remove the USB flash driver from LCD TV
(9) Check the program version.
2. Downloading application code
(1) Change the application code's file name into "appl.rom".
(2) Copy the "appl.rom" into the path "/bordeaux/us" in USB flash driver.
(3) Turn off LCD TV.
(4) Insert the USB flash driver into the service 1 jack of LCD TV.
(5) Turn on LCD TV.
(6) The banner osd "Updating SW..." is displayed.
(7) The banner osd "Completed..." is displayed when the updating is completed.
(8) Turn off and remove the USB flash driver from LCD TV
(9) Check the program version.

wonder if this might fix it, but don't know where to get file or files, Thanks.

[nomoresonys]

Re: samsung LN-S4051D diagnal lines

think I forgot a few steps, with mainboard unplugged from ps, tested I think its called the rail, on power supply, have 6.3 on stndby, board says 6.5, the rest the 12's 5's and 13v are 0, thats not good, unless the mainboard needs plugged in to get those volts, and seems like 1 diode in that area reads ol in both directions, Thanks.

[nomoresonys]

Re: samsung LN-S4051D diagnal lines

got bad reading from diode ds805 read in board .058 in both directions, tried to take it out to read it but broke it, no solder skillz at all lol, also diode ds804 read .344 is that too low?, hard to read numbers on tiny diode , looks like GP v8180 n493 or n498?, does that sound like a familiar diode, I messed up label a bit getting it out, Thanks.

[nomoresonys]

Re: samsung LN-S4051D diagnal lines

http://www.cnet.com/news/samsung-pow...-suit-follows/

[nomoresonys]

Re: samsung LN-S4051D diagnal lines

does anyone know which capacitor the cnet article refers to?

[nomoresonys]

Re: samsung LN-S4051D diagnal lines

looking to scavenge a diode or two from other old electronics boards, wonder what ones will work?

[nomoresonys]

Re: samsung LN-S4051D diagnal lines

can not figure out which diode to order, appears to be a gp, n493, dont see it anywhere.

[budm]

Re: samsung LN-S4051D diagnal lines

What do get using Ohm mode to check the Diode?
Location of that Diode?"

[budm]

Re: samsung LN-S4051D diagnal lines

They were talking about the caps on the power supply board.
I never seen this symptom like this before.

[nomoresonys]

Re: samsung LN-S4051D diagnal lines

got bad reading from diode ds805 read in board .058 in both directions, tried to take it out to read it but broke it, no solder skillz at all lol, also diode ds804 read .344 is that too low?, hard to read numbers on tiny diode , looks like GP v8180 n493 or n498?, does that sound like a familiar diode, I messed up label a bit getting it out, Thanks.

its this diode, wanted to check it out of circ. but I broke it taking it out, its tiny, I believe its a power/rectifier diode, thanks for reply budm.

[splitcrete]

Re: samsung LN-S4051D diagnal lines

Check caps cm 807,808,809,811,812,817,cs806

Check diodes ds801,802,803
You just may find a couple of them bad.

[nomoresonys]

Re: samsung LN-S4051D diagnal lines

Check caps cm 807,808,809,811,812,817,cs806

Check diodes ds801,802,803
You just may find a couple of them bad.

hi splitcrete, I dont have an esr meter to check caps, checked diodes,801,2,3, checked ok in cir., 804 was .344, 805 was .058 in both directions, tried to take it out to measure out of cir. but it broke, or is there a way to measure caps with the mm.

[nomoresonys]

Re: samsung LN-S4051D diagnal lines

theres numbers on the tiny diode, I couldnt match them up on digikey, pretty sure its a power/rectifier diode, black with the grey band, numbers on it are v8180, n493, gp, Thanks for helping, not getting too far with this one.

[nomoresonys]

Re: samsung LN-S4051D diagnal lines

woah, just looked at those pics. again, theyre terrible, gotta get a better camera.

[nomoresonys]

Re: samsung LN-S4051D diagnal lines

do you think a bad diode would make that snowy horizontal like picture?

[nomoresonys]

Re: samsung LN-S4051D diagnal lines

trying to locate a training manual, no luck yet.

[splitcrete]

Re: samsung LN-S4051D diagnal lines

That model tv is known for bad panels. I would change the caps,and diodes to see if any thing changes.

[budm]

Re: samsung LN-S4051D diagnal lines

Which one of these is you board?
http://www.shopjimmy.com/samsung-bn9...ain-board.htm#
http://www.shopjimmy.com/samsung-bn9...main-board.htm
Does your board have this cap?