Samsung un40c6300 relay clicking

[tibimakai]

Re: Samsung un40c6300 relay clicking

That was meant to Sangdy.

[sangdy]

Re: Samsung un40c6300 relay clicking

You should have not ordered that mb. First, you have to be sure, that you ps and led backlight works.
Now you will have to do some measurements and post it here. What you are getting, at that connector?

Thank you.

Sorry for the late response, didn't have time to work on it and will go on with it this weekend and do some measurements as suggested and post it here :-).

[sangdy]

Re: Samsung un40c6300 relay clicking

Thank you.

Sorry for the late response, didn't have time to work on it and will go on with it this weekend and do some measurements as suggested and post it here :-).

No luck to force on either the main power supply or the backlights following the method budm provided on the post #7 (use 500~1K resistor between POWER ON/OFF pin 18 and the STBY pin 16 and then another resistor of the same value between BLU ON/OFF pin 4 [instead of 14, right?] and and STBY pin 16). See the photos attached here.


Also, here are the measurements on cn802 pins:

pin 1 D12V= 1.24 drops to 0
pin 3 D12V= 1.24 drops to 0
pin 5 D12v = 1.24 drops to 0
pin 7 gnd = 0
pin 9 gnd = 0
pin 11 d5.3 = 0.32 drops to 0.21
pin 13 d5.3 = 0.32 drops to 0.21
pin 15 vamp = 3.21 drops to 0.27
pin 17 vamp = 3.21 drops to 0.27

Pin 2 det = 0
pin 4 BL = 0
pin 6 pwm = 3.96 drops to 1.99
pin 8 h-sy = 0.32 drops to 0.22
pin 10 gnd = 0
pin 12 gnd = 0
pin 14 d5.3 = 0.32 drops to 0.2
pin 16 5.3 sb = 5.34
pin 18 ps = 1.21 drops to 0

It looks like something wrong with the PSU board, if anyone can let me know which part (capacitors?) I need to check, that would be helpful.

Thanks in advance for any inputs.

[budm]

Re: Samsung un40c6300 relay clicking

"pin 4 BL = 0". Your post #4 shows pin4 BL = .068 with connector in place.
"pin 18 ps = 1.21 drops to 0". Your post #4 shows pin 18 ps = 3.2V with connector in place.
Are you sure you count the pins correctly? No way you can have 0V with the resistors connected, it has to be errors.
It looks like you count the pins wrong.
Pictures provided by shojimmy.
BN44-00356B

[sangdy]

Re: Samsung un40c6300 relay clicking

"pin 4 BL = 0". Your post #4 shows pin4 BL = .068 with connector in place.
"pin 18 ps = 1.21 drops to 0". Your post #4 shows pin 18 ps = 3.2V with connector in place.
Are you sure you count the pins correctly? No way you can have 0V with the resistors connected, it has to be errors.
It looks like you count the pins wrong.
Pictures provided by shojimmy.
BN44-00356B

Thanks for the response budm and sorry for not being able to respond in time.

Here are few clarifications:
1. #4 post is rustover's and I just copied the format of the pins ;-)
2. I measured the voltages with mainboard (video board) connected instead of the resistors.
3. Regarding the pin#s, I measured from the other end (to the mainboard), sorry for the confusion. (The pictures you marked really make sense)

Do you mind letting me know which part I need to check? Thanks a lot.

[budm]

Re: Samsung un40c6300 relay clicking

Well, since you count the pin wrong then you need to attach the resistors to the correct pins first to find out if the power supply and backlights circuit are OK or not.

[sangdy]

Re: Samsung un40c6300 relay clicking

Well, since you count the pin wrong then you need to attach the resistors to the correct pins first to find out if the power supply and backlights circuit are OK or not.

thanks for the response. Just an update that finally solved the problem by purchasing a replacement PSU board from buyqual.

[budm]

Re: Samsung un40c6300 relay clicking

Thanks for the follow-up, at least you have spare power supply board that may be can be fixed at later date.

[matlas01]

Re: Samsung un40c6300 relay clicking

can you tell me where i can get the 500~1K resistor
and what ohm it should be
thanks Mike

[budm]

Re: Samsung un40c6300 relay clicking

can you tell me where i can get the 500~1K resistor
and what ohm it should be
thanks Mike

The value can be from 500 ~1000 Ohm range, power rating 1/4, or 1/2W will be fine.
Local TV/electronics repair shop?

[tibimakai]

Re: Samsung un40c6300 relay clicking

I still have this TV, needs a mainboard. I don't feel like, spending like $80-130 for a board.

[nomoresonys]

Re: Samsung un40c6300 relay clicking

One there for 63 bucks, has a make offer option, 63 seems like too much for a 40 inch tv, I'd make an offer about 30, that's plenty in today's market.

[tibimakai]

Re: Samsung un40c6300 relay clicking

I saw that, but first I need to make sure that the screen is still intact. It went through three moves. I don't believe, that the seller will let it go, for that cheap.

[nomoresonys]

Re: Samsung un40c6300 relay clicking

He might not, I don't think he'll move it for 63 tho, when you can buy a new tv that size for 200 or under.

[tibimakai]

Re: Samsung un40c6300 relay clicking

It would be nice though, to have this TV, for my security cameras.

[nomoresonys]

Re: Samsung un40c6300 relay clicking

Maybe offer m 40.

[tibimakai]

Re: Samsung un40c6300 relay clicking

You are pushing me to repair this, I like it.
I will have to force start this TV again, to check the screens condition and than I will offer him $40.

[Sparky2013]

Re: Samsung un40c6300 relay clicking

I have one of these UN40c6300 model on my bench now. power board is simply dead. I found a bad MOSFET ic QM401 that runs the 5.3v line at pins 11,13 & 14 Connector to main board its only outputting 3.6V. Hoping this will fix it. PArt # is AO4498EL. Obselete part, Replacing it with a AO4468. Wish me luck.