Strange problem with Sony XBR-85X850G 85" LED tv

[mitsu2k]

Re: Strange problem with Sony XBR-85X850G 85" LED tv

first you must ensure them are the problem

Yes I understand, that's why I need a datasheet so that I can know which pins are what so I can test with multimeter.

By the way, thank you Davi.p!! I appreciate all your help.

[Davi.p]

Re: Strange problem with Sony XBR-85X850G 85" LED tv

first you must ensure them are the problem

[mitsu2k]

Re: Strange problem with Sony 85" LED tv

Yes are them, must remove them one by one with hot air and see, or if you are lucky you can locate the faulty one by measuring each clock line with oscilloscope or frequency meter and see the perturbated one

Are these the protection diodes? I cannot find these part numbers or datasheet online.

[Davi.p]

Re: Strange problem with Sony 85" LED tv

Yes are them, must remove them one by one with hot air and see, or if you are lucky you can locate the faulty one by measuring each clock line with oscilloscope or frequency meter and see the perturbated one

[mitsu2k]

Re: Strange problem with Sony 85" LED tv

dist. boards= the large short boards glued onto the panel, cof= the driver chips glued to the screen, not replaceable

Thank you, you mentioned protection diodes. Can you please enlighten me on what these look like? I see 3 components on each side on the driver/dist board (total 6) right underneath the ribbon cable. They are marked D004, D005, etc. each chip has 8 legs. Can these be the protection diodes?

[Davi.p]

Re: Strange problem with Sony 85" LED tv

dist. boards= the large short boards glued onto the panel, cof= the driver chips glued to the screen, not replaceable

[mitsu2k]

Re: Strange problem with Sony 85" LED tv

100% panel fault, but which part? Distribution pcb or cof?? Seems a problem on the clock lines but all togheter means maybe an overload/overheating of a shorted cof, since gate signals are not involved with capacitors then leave them alone, the only your hope are protection diodes on dist. pcb..

Thank you Davi.p, can you explain to me what the dist. pcb is and where it is located? Also what is "cof"?

[Davi.p]

Re: Strange problem with Sony 85" LED tv

100% panel fault, but which part? Distribution pcb or cof?? Seems a problem on the clock lines but all togheter means maybe an overload/overheating of a shorted cof, since gate signals are not involved with capacitors then leave them alone, the only your hope are protection diodes on dist. pcb..

[mitsu2k]

I am working on a Sony XBR-85X850G tv and I am puzzled as to what could be wrong with it. My friend took it to a repair shop where the shop stated they had replaced the Main Board and T-CON board but the problem remained unchanged. The repair shop said they felt that the panel was bad. I am not sure the panel is bad. I could be wrong but most bad panels I have seen the vertical lines remain fixed. However the vertical lines here move around and take on various colors and patterns, width, etc. Also, the display aspect ratio almost seems that it has shrunk to 4:3 as I can see black borders on the sides. I have factory reset the tv and when I try to make selections during initial setup, for the first few seconds I can see the items on the screen but I cannot select them. Meaning I do hear the "ding" sound as if it is moving from selection to selection but the highlight/cursor does not move from selection to selection. It could be that I am selecting things when I hit enter but the display is not registering the chosen selections. Very strange.

Any help, suggestions or advice is most appreciated. Please see photos.


p.s. I just wanted to mention that I also did check and clean all the ribbon cables.