Many thanks from a Sony KP57HW40 owner

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dlveazie
Many thanks from a Sony KP57HW40 owner

My wife and kids were playing Wii when the TV went 3D on them. TV was new in 2001 and has made 4 moves without any issue. After scrubbing the internet for a fix I found this site and wanted to comment on a few things that might help others in the future.

1. Larry Dillon, whoever and wherever you are - THANK YOU, THANK YOU, THANK YOU

2. I could tell only the green tube was off so I figured the convergence chips were the problem and not the voltage rails or all the colors would skew I think. I used www.electronic-repair-kits.com and they no longer sell STK392-560 but recommend STK392-570. $38.95 for a set of 2 and $5 shipping. Ordered on a Wednesday, shipped on Friday, and received the next Friday in Colorado from British Columbia.

3. Old part removal: My plan was to remove the board and take it to work where all the soldering equipment is. After opening up the TV, it was much easier to bring the equipment to the TV because of all the connectors that would have to be removed. Loosen all the cables from the tie downs and remove CN17, 18, and 19 from "A" board (like the service manual says). Pull out chassis and tilt up. Only had to cut out two covers on the bottom (F and G, I think). Wicked off solder from the bottom. Loosen screws from ICs and remove.

4. Prep and new part install: With isopropyl alcohol and Kim Wipes, Clean heat sink surface and back of new parts. This was one step where I was a little concerned. Normally parts I use come packaged in ESD bags and are clean. ERK taped a piece of cardboard to the replacement parts that left goo on the back of the parts. It had to be scraped off and cleaned. Spread heat sink grease on back of new part. Install and screw down. Solder on bottom and replace covers (you need to provide screws). Reinstall chassis (don't forget CN17, 18, and 19). If you feel lucky, tie down wires, and replace all covers before testing.

5. One last comment. Since I had everything right there, I cleaned the top of the tubes with alcohol and Kim Wipes since they were dusty. My old body wouldn't let me contort to clean the mirrror or back of the screen and I'm not sure that alcohol would be the right thing anyhow. Everything looks great but the colors are definitely more saturated. Not sure if it was the cleaning or the new and slightly different parts. I have a copy of Digital Video Essentials so I'll recalibrate sometime.

Thanks again to all the contributers of this site, especially Larry. Good luck to anyone who tries this fix. It really was not bad at all and saved hundreds versus a repair call.

Dave

 

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