Sony KP53S65 power supply

[mailmanusa]

This is my first post to this board. My name is John. How are you all?

Ok to the problem: We were just sitting and watching our Sony rear projector KP53S65 (aprox 5-6yrs old) and a small pop followed by a burnt smell. It is plugged into a surge protector. The TV wont do anything but a quiet click and the red light next to the power button flashes steady. I took the back off to have a look. Very dusty in there. I plugged it back in to observe and see if I could see what might have burnt. What I saw was small amount of smoke rising up from a little component on the power supply board. Disc shaped component a bit smaller than a dime connected into the board with the typical two wires. I wanted to post a pic of the exact part that was smoking but cant find the camera right now. I can post a pic later if it would help. My question is, could it be this part alone causing the problem, or is it likely other things have gone bad too? Can this power supply board be repaired or should the entire board be replaced? Whats the average cost either way. Im not a TV repair man but im ok with a soldering iron. Is it foolish for me to attempt getting this small part and trying to put it in myself?

Thanks in advance for any help, John

[mailmanusa]

The part that is obviously fried is C514 as noted on the board. I guess this is a capacitor? Where would I buy this part? Any others things to check as a result of the failure of this C514? Any reason why it would burn in the first place?

[mgmcdonald]

Did you figure out a fix for this problem. This morning 1/28/05, the same problem occurred. Watching TV, a pop sound, the picture went off and the power light started blinking. Smelled electrical odor. Wondering if you fixed your TV and about how much it cost you.

Thanks.

[zigzag]

There was a reason that part went out and it being on the power supply board there probably is some other component shorted. You would have to have a service manual to repair this tv or some skill in troubleshooting a power supply. Another way to go is to replace the whole board. I believe your tv power supply board is a "G" board and it can be purchased and installed by you with minimal technical expertise.
Here is a link to that board but you should at least confirm that this is the exact board you would be replacing by matching any numbers on the board to the one below.


http://www.partsolver.com/Product.asp?InventoryID=1043242&SubstitutePart=0&ModelManufacturer=Sony&ModelNumber=KP-53S65&ModelID=16058&OrgPartNum=&OrgPartMfg=Sony

[mgmcdonald]

Thanks for the information

[kuhurdler]

what size is that capacitor? I'd try replacing that long before I paid $300 for a new board.

[flow274]

i know its been a while but has anyone figured out what the problem was i have had the same problem withe the c514 cap burning up on this model

thanks

[DIM_2007]

The same thing!
its been a while but has anyone figured out what the problem was i have had the same problem withe the c514 cap burning up on this model

[steven36]

The same thing!
its been a while but has anyone figured out what the problem was i have had the same problem withe the c514 cap burning up on this model

C514 the reason this capacitor fails is to protect xray radiation from being generated from the tv when the anode voltage peaks above 32kv.the capacitor will destroy itself causing a short between the 600volt line coming out of the flyback transformer and the collector of the horizonal output transistor. this causes the primary fuse to blow sometimes but not always.the self diagnostic system will detect the fault and this causes the television to go into protection mode. if you do not have a lot of technical know how i do not recomend trying to repair the yourself. i have replaced many of these caps in my 15years as a tech and have had sets to play fine just after dropping a new in with no other problems the capacitor is a 390pf ceramic disc with a 2kv voltage rating with a tolerence of 10% this is very important that you use the same type capacitor for continued safty. good luck