Bn44-00604f

[mi16rs]

HI

I have a power suply BN44-00604F whit the R9151 and R9152 blow could some one tell me were i can find the service manual for this board so i could see the value of the Resistence ?

Thanks
Nuno

[R_J]

Re: Bn44-00604f

After translating another site I think they could be 2 ohm each
h++ps://translate.google.com/translate?hl=en&sl=ar&u=http://www.amwajsat.net/vb/showthread.php%3Fp%3D78196&prev=search

[mi16rs]

Re: Bn44-00604f

Hi

Thanks a lot i will try and report latter

Thanks
Nuno

[mi16rs]

Re: Bn44-00604f

Hi

i have put the 2 ohm and still no power on the tv i have found that 2 leds are direct so i put the 5 diodo 1n4007 on it and still the same thing .
the red led blinks 5 times .
Whit the main board disconect from the power suplly board wen i conect the power cord on the leds panel iluminates for a second or so and goes off so the problem is in the power board

could some one help me out
and iff some one as the manual for this board .

Thanks

[budm]

Re: Bn44-00604f

Can we see the pictures of the whole back side of the TV and the pictures of the boards?

[mi16rs]

Re: Bn44-00604f

HI

Here it is.



PS. I just see that i have post on the rong side off the forum if some moderator whants could put on the right side

Thanks

[mi16rs]

Re: Bn44-00604f

HI

NO ONE ???


THANKS

[budm]

Re: Bn44-00604f

That power supply/LED driver board is known for having poor soldering joints on the power transformer legs, so I would at least resolder all the transformer leg.
BTW, the two 2 Ohms resistors, were they burnt out or what was wrong with them?

[mi16rs]

Re: Bn44-00604f

Hi

i have already check de soldering and they are all ok .
as for the 2 ohm resistors they were blowed becouse they touch in the frame and they blow .

i have put 2 new ones and it as the same problem led light blinks 5 times the led bars light for a second wen i plug in the power cable and goes down so there is something in the board but i cant find it

[mi16rs]

Re: Bn44-00604f

i have measured the CNL802 that conects the cable to the leds and whit the plug on it or off it give me the same values

15_ 1F2 0V
11_ 1- 0V
9_ 2- 0V
5_ 3- 0V
3_ 4- 92.6V
16_ 1F1 0V
12_ 1+ 179.2V
10_ 2+ 0V
4_ 4+ 0V

This was measured whit the main board disconect and ground directo on the PSU

Thanks

[budm]

Re: Bn44-00604f

i have measured the CNL802 that conects the cable to the leds and whit the plug on it or off it give me the same values

15_ 1F2 0V
11_ 1- 0V
9_ 2- 0V
5_ 3- 0V
3_ 4- 92.6V
16_ 1F1 0V
12_ 1+ 179.2V
10_ 2+ 0V
4_ 4+ 0V

This was measured whit the main board disconect and ground directo on the PSU

Thanks

That feeding Voltage of 179VDC (at 12 1+ pin) to the Anode of the LED strings indicate the load is too light or you have open circuit in the LED string or in the LED Cathode current return path.
If you look at the Voltage chart as printed on the board, it shows VLED feeding Voltage of 145V with 240mA max current, that is the output with load, without the load the output will go up too high and will trip the shutdown circuit.
Do you get the same 179VDC if the LED connector is not in place?

[mi16rs]

Re: Bn44-00604f

Hi

yes whit the conector on or off i get the same value

[budm]

Re: Bn44-00604f

That means it is not seeing the load, which can be the open circuit in the LED string, or open circuit in the current return path for the LED which is on that power supply board.
BTW, for those two 2 Ohms resistors which are connected in parallel to form 1 Ohm resistance, something must have been drawing too much current through them to cause them to burn up.
Are you 100% sure that the whole LED string which are consisting of 5 LED strips (9 LEDs per STRIP, 45 LEDs total) and connected in series to form one large LED string are good for sure?

[mi16rs]

Re: Bn44-00604f

yes im 100% sure all the led strip are ok apart from the 2 ones that i have put the diods
the 2 Ohms resistors like i sayd they burn up becouse the board touch the frame by my fault as i didnt screw the board and wen i lift the panel it slide and touch the frame

[ilija]

Re: Bn44-00604f

hi

Can someone tell me the values of the resistors rm817 and dm803 are located on the underside of the MOSFET

Thank you

[R_J]

Re: Bn44-00604f

Rm817 = 0Ω, DM = 1N4007

[ilija]

Re: Bn44-00604f

Rm817 = 0Ω, DM = 1N4007

Thank you

[Genni]

Re: Bn44-00604f

Ciao
Ho anch'io un problema con la scheda in questione, dopo svariate prove ho trovato il transistor Q9051 in corto solo che non si legge più nulla, mi potreste aiutare.
Grazie

[markhesketh]

Re: Bn44-00604f

Hi ilija, did you solve this issue as I have the same problem with the LED blinking 5 times. The manual button on the back of the TV works as the time makes some sounds but there is no picture.

[xegak]

Re: Bn44-00604f

i have the voltage that feed led 217 v ( between the two pins that goes to the leds) is that ok ?