sony kdf- 55wf655

[testas86]

Hi guys i have a sony kdf 55wf655 tv and the bulb went out so i bought a new one and stuck it in and the unit is still not turning out. I took it apart and the power supply looks ok and every other logic board i could find. Any tips or help would be greatly appreciated

[Dgtech]

Re: sony kdf- 55wf655

Are there any blinking power lights or lamp lights, anything? I had worked on a couple of sets now where the problem was simply that the door to the lamp was not closed properly. Check this and make sure that it is exactly how it came apart. There is a micro-switch that will keep the set from coming on if the door doesnt close the switch.

[testas86]

Re: sony kdf- 55wf655

ok i will check that out. but no nothing is blinking or coming on. no lights what so ever. but i can hear a buzz from the power supply.

[Village Electronics]

Re: sony kdf- 55wf655

ok i will check that out. but no nothing is blinking or coming on. no lights what so ever. but i can hear a buzz from the power supply.

Without ANY lights, check the power supply. The same as any LCD TV you
have to have standby before anything else will work. There are no major issues with the power supply. The power supply is the horizontal board behind the ASU/DSU stand up pair that you see when you take the back off.

First thing I would do is take that lamp back out before I try to turn it on again. See if you get lights then. A "buzz" might be a loaded power line feedback.

[testas86]

Re: sony kdf- 55wf655

ok so i took the power supply out and checked everything and it looked ok

i tried turning the unit back on and it flashes green 5 times and red 6 times.

[PlainBill]

Re: sony kdf- 55wf655

ok so i took the power supply out and checked everything and it looked ok

i tried turning the unit back on and it flashes green 5 times and red 6 times.

Service manual is here.

6 red blinks seems to be the thermal fuse under the lamp.

PlainBill

[Village Electronics]

Re: sony kdf- 55wf655

ok so i took the power supply out and checked everything and it looked ok

i tried turning the unit back on and it flashes green 5 times and red 6 times.

Lamp driver or Q box, times-No "DD 6V " output (G1 board).

Interesting that this TV was working and that these problems happened concurrently to a lamp change.

[testas86]

Re: sony kdf- 55wf655

OK so i replaced the thermal fuse and it turns on but now i have blue dots all over the screen. any idea what is causing this and how to fix it?

[Village Electronics]

Re: sony kdf- 55wf655

OK so i replaced the thermal fuse and it turns on but now i have blue dots all over the screen. any idea what is causing this and how to fix it?

optic block

[testas86]

Re: sony kdf- 55wf655

ok so i did some research and it looks like they polarizing lens for the blue gets degraded over time due to heat. so i took mine apart and sure enough it looks foggy and discolored. . now im thinking of replacing the lens its self but i have a few questions.

1. do you think this will fix the issue
2.how hard is it to adjust the lens ( took out the others to make sure they wernt messed up as well and might have knocked off the adjustment.)

[Village Electronics]

Re: sony kdf- 55wf655

ok so i did some research and it looks like they polarizing lens for the blue gets degraded over time due to heat. so i took mine apart and sure enough it looks foggy and discolored. . now im thinking of replacing the lens its self but i have a few questions.

1. do you think this will fix the issue
2.how hard is it to adjust the lens ( took out the others to make sure they wernt messed up as well and might have knocked off the adjustment.)

polarizer is not the problem. It's the LCD itself. They can be changed but need alignment after doing so. This can take quite some time and is largely experimental moving of the LCD in small increments while watching the picture.

Is this a TV you came bu or have you owned it since it was new?

[testas86]

Re: sony kdf- 55wf655

ok so before i go and buy parts this is the part i took out and looks really bad

https://sites.google.com/site/sonylc...attredirects=0


are you saying the part i need to replace is the lens in there or the pic from above?

https://sites.google.com/site/sonylc...t/SANY0070.jpg

[testas86]

Re: sony kdf- 55wf655

and to answer your other questions this is a friends tv so i personally havnt owned it but they bought it new

[Village Electronics]

Re: sony kdf- 55wf655

and to answer your other questions this is a friends tv so i personally havnt owned it but they bought it new

Have your friend contact Sony. They will replace it for him. He must have the original receipt.

[testas86]

Re: sony kdf- 55wf655

will it cost them money? or is there a recall or something