This set just quit working. No Flash, no noise, no warning signs. Three years old. Here are pictures of whole set and each respective board. Green LED will come on with both remote and push button, but after 30 seconds goes off and Red LED goes back to six blinks. No back light from what I can see. Any suggestions on points to test voltage or otherwise are greatly appreciated.
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Sony KDL50EX645 Six Blink
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Re: Sony KDL50EX645 Six Blink
Reset code using 10 sec on..unplug for 15 sec..plug in and turn on using PB switch..Solid green then three green blinks for about 30 seconds...then back to six blinks. Measured pins labeled UNREG 24 Volts leading to inverter when light is green..only getting 1.59 volts. Tried this with inverter plugged in and unplugged..same result so I am reasonably sure the inverter is not dragging it down. I read on a forum that there is a known design defect in the 24 volt transformer section of this board.
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Re: Sony KDL50EX645 Six Blink
Did you verify the main board is sending a power on command? The 24V will measure low if the main board does not send that command.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.
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Re: Sony KDL50EX645 Six Blink
r602d is part of the series sensing resistors (A~D, sensing the Boosted PFC Voltage(>360vdc)), very high resistance resistors feeding IC601.
http://assets.shopjimmy.com/media/ca...-11-bottom.jpg
http://www.shopjimmy.com/sony-1-895-...e50-board.htm#Last edited by budm; 05-17-2015, 10:33 PM.Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999
Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/
TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809
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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
LJLast edited by ljintexas; 05-25-2015, 09:12 AM.
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