Sony KDL50EX645 Six Blink

[jetadm123]

Re: Sony KDL50EX645 Six Blink

Thanks for sharing. If it was indeed a design defect, it would be interesting to know if Sony used different part numbers/values from the originals.

[Allwiredup]

Re: Sony KDL50EX645 Six Blink

Hello guys, newbie here, I have also have the 50ex645 tv with the 6 blinks, I'm looking on my power supply for the smd R602d, but on the board R602A-C are smd but the R602D is just a 1/4 watt resistor that is on the top of the board, not the backside, am I looking at the right one?

[Power sony]

Re: Sony KDL50EX645 Six Blink

Hello guys

I need to buy the main board because nobody can repair it in my city.
could you give me the model number or number part

Thanks in advance

[salongaopm]

Re: Sony KDL50EX645 Six Blink

Just got repaired smps back from Sony service agent. They charged me $85 including Priority Mail return shipping. After close inspection here is what I found that was done:

Replaced R602 A-D
Replaced IC601
Replaced IC303
Replaced D305
Replaced ZD306

Works like a champ.

Thanks
LJ

can anyone provide the part number for the above parts(mouser or digikey)?

thanks!

[Louis82]

Re: Sony KDL50EX645 Six Blink

Hello there.

What is R602D resistors value ?

Thank you.

[budm]

Re: Sony KDL50EX645 Six Blink

Hello there.

What is R602D resistors value ?

Thank you.

R602A~D are all same resistance.
What does it show on your board?
http://assets.shopjimmy.com/media/ca...-11-bottom.jpg

[Louis82]

Re: Sony KDL50EX645 Six Blink

Hi Budm,

Thanks for responding. R602 from A-C are SMD resistors and D is mounted 1/4 w. Colors :RED - PURPLE - GREEN - GOLD. Is this 2.7 Mega Ohms ?

[Louis82]

Re: Sony KDL50EX645 Six Blink

Ok. SMD's are 2.7 apparently. Can't find this resistor in any of my scrap boards.

[Louis82]

Re: Sony KDL50EX645 Six Blink

In case anybody gets confused like I did. Here is a picture of R602D

[budm]

Re: Sony KDL50EX645 Six Blink

OK, I see now, 602A ~C are SMD, R602D is through-hole resistor under the heatsink. It looks like 2.7M Ohms.

[yurivictoria]

Re: Sony KDL50EX645 Six Blink

Replaced in mine: R602D (through-hole resistor under the heatsink) because it read over 20ohms and now tv works again. thank you everyone in this forum, super helpful

[BunnyFooFooSR]

Re: Sony KDL50EX645 Six Blink

Replaced in mine: R602D (through-hole resistor under the heatsink) because it read over 20ohms and now tv works again. thank you everyone in this forum, super helpful

I replaced same resistor but with a 2.7m @ 1/4 and she booted, was a salvage from the Dump, total cost $1, boost to pride "Priceless". I love to keep things out of the dump way to much value going into dump. (This must have been a display model still had blue protective peel away plastic on it)

Thank you Badcaps.net members.

[PabloDiablo]

Re: Sony KDL50EX645 Six Blink

I replaced same resistor but with a 2.7m @ 1/4 and she booted, was a salvage from the Dump, total cost $1, boost to pride "Priceless". I love to keep things out of the dump way to much value going into dump. (This must have been a display model still had blue protective peel away plastic on it)

Thank you Badcaps.net members.

So I have the same model and same issue...
I am very much a novice but think I can handle replacing a resistor! My only question regarding this particular one is since it resides under the heat sink, how do you get to it? remove the cage? any advice would be much appreciated.

thanks

[alfatv]

Re: Sony KDL50EX645 Six Blink

Good tip, fastest repair ever!

[RDC55]

Re: Sony KDL50EX645 Six Blink

Does anyone know the actual value for R602D? I pulled the part to confirm it is open, but I am still undecided on the actual value. It appears to be Red Violet Blue Gold, which would make it 27 meg. The others R602A,B,C are SMD and marked 2704, so 2.7 meg.

And here is a Spanish speaking gentleman saying it is 27 ohms, but I know you can't believe everything on YouTube

https://www.youtube.com/watch?v=r94EW6CuJmo

Edit - Nevermind, I seemed to have missed page two which seems to identify this as a 2.7 megohm resistor.

[RDC55]

Re: Sony KDL50EX645 Six Blink

Nevermind, I managed to not see page two and the consensus seems to be 2.7 megohm.

I attached a pic (best I could do) and it looks like Red Blue Green Gold

[dick_barton]

Re: Sony KDL50EX645 Six Blink

Strange, but it looks like 2.6 Mohm. Middle band looks blue in your photo.

[RDC55]

Re: Sony KDL50EX645 Six Blink

Strange, but it looks like 2.6 Mohm. Middle band looks blue in your photo.

I guess it just depends on the light - under a bench top microscope the second band appears to be violet, but the third band looks blue. The photo was taken with a digital microscope and video captured, and I agree the second band looks blue. I am going with the 2.7 meg since the SMD R602A,B,and C are clearly marked 2704.

I guess out of curiosity as I didn't see it addressed in this thread is why is the resistor opening and is it offering some protection because of some event? It seemed odd that they used 3 SMD resistors (3mm x 2.2mm) and then the oddball through hole at what appears to be 1/8 watt.

[R_J]

Re: Sony KDL50EX645 Six Blink

I suspect they used a through hole resistor because of the distance to pin 5 of the ic, They likely could have used another 2.7m smd resistor and then a jumper wire.
They often use a few resistors in series when connecting the high voltage (385vdc) from the main caps dc to an ic. likely to provide some arc protection.

[dick_barton]

Re: Sony KDL50EX645 Six Blink

There is a maximum safe working voltage you can apply to a set of resistors dependant on their composition and is why as RJ says, they spread any high voltage across a set of series resisitors which drops the voltage across each of them to a safe working voltage.