Samsung LE26B450C4W Dead

[nic2]

Hello I have read several posts on the subject but I have not found a case similar to mine. The TV is dead no picture no sound no red light in.standby. Checked voltage CP 815 = 326 v.dc. on the power circuit BN44-00259A. The connector CNM802 provide no evidence output voltage. The capacitors seem undamaged no anomalies. I replaced two electrolytic capacitors (CP809 and CM808) leveling power of the integrated FAN 7530 and who had a ICE3BR0665J ESR too high unsuccessfully checked all the diodes and transistors involved but do not come out
Who can help me?
thanks

Service Manual:
http://elektrotanya.com/samsung_ln26.../download.html
diagram at
https://www.badcaps.net/forum/attach...5&d=1300162507

[nic2]

Re: Samsung LE26B450C4W Dead

Anyone help me?

[budm]

Re: Samsung LE26B450C4W Dead

So you are not getting any voltages from any pin of the connector CNM802?
How about if you disconnect that connector, what do you get?
Fuse FM802S is OK?

[nic2]

Re: Samsung LE26B450C4W Dead

Thanks for the reply and I apologize for my English I translate with the help of google translated. I unplugged the power board BN44-00259th, the power is turned on and I find about 326 cp 815 volt fuse on that FM802s. (I find the same voltage 326 volt tester positioned DCV). Fuse is OK. The connector CNM802 I do not detect any tension. The mass was taken from pin 10 which is the mass of the CP 815 but I do not detect anything. I noticed that the diode zm801 measured by the tester was short on the card so I disassembled and measured again with the test results in reversing the leads short. Could this be the problem? I do not have this diode IN4740AS tomorrow I'm going to buy it ... Damage that could result?
I checked the capacitors and are not damaged and there are burns
I can do other controls?
thanks for your help

[nic2]

Re: Samsung LE26B450C4W Dead

I replaced the diode IN4740AS - zm801 found in short and magically the TV is on and everything is back to work properly. I could not find the diode and I used a zener diode compatible. The problem has been resolved. Thank you.

[Mgt280y]

Re: Samsung LE26B450C4W Dead

Good evening hopefully someone can help I have the above meantioned tv and it died I have opened up and it looks like it's a cap as it lookes like it has exploded and covered the neighbouring heat sink with soot can anyone provide the aspects for the offending cap as I can't read the text it is marked up on the board as "CP810" just need the values so I can replace fingers crossed

[budm]

Re: Samsung LE26B450C4W Dead

Good evening hopefully someone can help I have the above meantioned tv and it died I have opened up and it looks like it's a cap as it lookes like it has exploded and covered the neighbouring heat sink with soot can anyone provide the aspects for the offending cap as I can't read the text it is marked up on the board as "CP810" just need the values so I can replace fingers crossed

Did you look at the schematic?
0.22nF (220pF) 1KV, it is snubber cap (ceramic type), I would go with higher Voltage rating.

[Mgt280y]

Re: Samsung LE26B450C4W Dead

Not sure what the type is called as I haven't used one its a small blue one looks like a ceramic couldn't find a schematic for it

[budm]

Re: Samsung LE26B450C4W Dead

My post 3 has the schematic.

[Mgt280y]

Re: Samsung LE26B450C4W Dead

Oh yeah missed them I found a 220pf 2kv would that be better

[budm]

Re: Samsung LE26B450C4W Dead

That will be fine.

[Mgt280y]

Re: Samsung LE26B450C4W Dead

Cool thank you

[Moreno83]

Re: Samsung LE26B450C4W Dead

Let us know if that solved the problem! Im curious