Olevia 232-S12 no pic

[ivtec]

Hi guys,i found this LCD OLEVIA 232-12 with Power blue light and backlight is on,i have the 5v ,12v,23v,voltages,no bulging caps,anybody has clue of what could be?

[dskall]

Re: Olevia 232-S12 no pic

You should know the drill by now 1,137 posts. Need pictures. Got image on screen power on t-con etc.etc!

[ivtec]

Re: Olevia 232-S12 no pic

You should know the drill by now 1,137 posts. Need pictures. Got image on screen power on t-con etc.etc!

Thanks

http://www.shopjimmy.com/olevia-aep0...er-supply.htm#


http://www.shopjimmy.com/olevia-sc0-...or-232-s12.htm


http://www.shopjimmy.com/lg-philips-...-con-board.htm


http://www.shopjimmy.com/lg-philips-...rter-slave.htm


http://www.shopjimmy.com/lg-6632l-03...ter-master.htm

[attainteddragon]

Re: Olevia 232-S12 no pic

do you have continuity across f1 on the t-con board? marked tk.

[ivtec]

Re: Olevia 232-S12 no pic

do you have continuity across f1 on the t-con board? marked tk.

Thanks attainteddragon;Yes i have,

[attainteddragon]

Re: Olevia 232-S12 no pic

have you got 12v to t-con?

[ivtec]

Re: Olevia 232-S12 no pic

have you got 12v to t-con?

attainteddragon;Thanks once again,i just went to measure on F1 TK both sides and have 12v,one thing i notice the back-light has kinda faded blue color normally you see the back blight faded gray dark?


Here the Service manual but the points of the pins for the 5v,12, differ from what is actually in this board,


https://www.manualslib.com/manual/77...a-232-S12.html

[attainteddragon]

Re: Olevia 232-S12 no pic

not much of a manual. :/

i would disconnect one side of the t-con ribbon cables at a time to see if you get a pic at all, other than that, scoping the lvds to confirm signal to t-can would be handy.

[ivtec]

Re: Olevia 232-S12 no pic

not much of a manual. :/

i would disconnect one side of the t-con ribbon cables at a time to see if you get a pic at all, other than that, scoping the lvds to confirm signal to t-can would be handy.

Hi attainteddragon;thanks i disconnected 1 ribbon cable and turned on tv and i get Half screen gray half white,i did the other side something, also removed and wiggled one side of the LVDS wire and i had pink and blue,i don't have a scope,is there any component or board i should look over, thanks

[ivtec]

Re: Olevia 232-S12 no pic

Hi guys: Any other advice on this TV

[ivtec]

Re: Olevia 232-S12 no pic

Hi guys; today i took out Main board to check it out and i found out this L1117LG Regulator might be bad, i used on diode test

Pin 1 to ground 0.000,
pin2 to ground 0.000,
Pin3 to ground 0.574.

Here pics of the part on circuit =L1117LG

[dskall]

Re: Olevia 232-S12 no pic

You will need to check it for voltage with power on the board

[dick_barton]

Re: Olevia 232-S12 no pic

Pin 2 is the output so it looks as though you have either a defective regulator or something is shorting the output. I would lift off the regulator and check it and if the regulator appears OK then check if pin 2 solder pad is still shorted

[ivtec]

Re: Olevia 232-S12 no pic

Hi guys i replaced the regulator L1117 with this AMC 1117 -F0631j but i think it did not like it cause it blew up a these 2 components,see pic,now the main board is doomed,this is not the board just to let you know the location

[jetadm123]

Re: Olevia 232-S12 no pic

The 1117 regulator comes in several different voltage outputs. Are you sure the replacement was the same output as the original? Suggest you remove regulator and check output pad to ground for a short. Actually, you should have done what dick suggested while you had the original regulator off the board.

[budm]

Re: Olevia 232-S12 no pic

That is inductor (Ferrite bead: FB????), it looks to be for feeding the Voltage to the regulator. You should have checked the resistance on pin 2 and pin 3 pads against GND before installing the new regulator first, then you check it again after installing new parts to make sure you did not have any solder bridges.
Right now you have shorts circuit that need to be found first.

[ivtec]

Re: Olevia 232-S12 no pic

Thanks guys,My fault i should not have installed that regulator that i found out was a 1777 but adjustable reg. besides the board is all bad from the start,not worth it, i was taken from trash,and to trash it goes ,not spending a red penny on this,maybe i'll keep it for awhile maybe i'll find another one like this for parts,thanks anyway.

[ivtec]

Re: Olevia 232-S12 no pic

Hi guys ;i've got another main board from Ebay and it does same thing,today i went to test voltages per service manual that downloaded from the site but this service manual misses the schematic for Voltages,but the trouble shooting tree has some tips,.

i have fallowing needed voltages

CN904-pin 7 to Ground =5v,Pin 8=5v
also have main Board Cn 4 - pin 1 to GRD =5v,and Pin 3=5v
CN 5 -Pin2 to Grd = 12V


But i went to check the 12 volts at the T-con board and 12v missing,the fuse is OK,so not 12 v reaches T con fuse,
what does that tells you/ any other advice,i'd hate to a buy a t-con board and waist more money,thanks

[attainteddragon]

Re: Olevia 232-S12 no pic

if you do not have 12v at the input of the fuse, then it will be the main board. just to make sure, disconnect the t-con and check to see if the 12v comes up or not.

with this replacement main board, do you have your voltages on the regulator position that you replaced on the last board?

[ivtec]

Re: Olevia 232-S12 no pic

if you do not have 12v at the input of the fuse, then it will be the main board. just to make sure, disconnect the t-con and check to see if the 12v comes up or not.

with this replacement main board, do you have your voltages on the regulator position that you replaced on the last board?

attainteddragon;I don't have no voltages from previous regulator position,also do you mean the 12v on the main board ? I have the 12v at Cn5 pin2,does the 12v from main board goes throughout the LVS cable to T-con ? Here a pic of the screen i have don't mind the reflections it's kinda faded bluish,someone told me this pic is symptoms of a bad T-con,i hate to spend more money on this,thanks