samsung ue32c5100 not power no stand by

[hectorcrk]

hello again

my tv is not working, nopower , no standy, no led ,no image

try to dissasembly and no bulb condensateur, fuses working fine

how to resolve it , thanks

[sordids999]

Re: samsung ue32c5100 not power no stand by

posting some pictures of the boards may help you

[Pentium4]

Re: samsung ue32c5100 not power no stand by

Check for bad joints, and post clear pictures of both sides of the board

[hectorcrk]

Re: samsung ue32c5100 not power no stand by

waitinng one hour and post images of power supply . thanks

[hectorcrk]

Re: samsung ue32c5100 not power no stand by




hello again , upload pictures. thanks

[budm]

Re: samsung ue32c5100 not power no stand by

OK, did the TV just stop working or was it hit by surges? Did any one else work on it before?
You can start with by check the DC voltage right at the two legs of the two long caps laying on their side, just be careful not to touch anything with your hands or body.

[hectorcrk]

Re: samsung ue32c5100 not power no stand by

hello again

budm thanks for aswer

yes this tv led working fine , disconeect to the electrical power
next day , plug in the electrical , power on , on not working it

no other circuntances

sorry for my bad english language

thanks

[budm]

Re: samsung ue32c5100 not power no stand by

Diagram for BN44-00351B oiwer supply:
http://www.toms-service-manuals.com/

[sordids999]

Re: samsung ue32c5100 not power no stand by

Hi guys

im having the same problem totally dead,i have checked for cold solder joints and i have tried disconnecting the main board legend to see if i can get back lights but nothing
warmed up the power supply and main board but still nothing also no voltage from the PSU legend but main 450v caps are reading 334 volts

[ReeceyBurger123]

Re: samsung ue32c5100 not power no stand by

Hi guys

im having the same problem totally dead,i have checked for cold solder joints and i have tried disconnecting the main board legend to see if i can get back lights but nothing
warmed up the power supply and main board but still nothing also no voltage from the PSU legend but main 450v caps are reading 334 volts

Checked secondary side for short circuits ?

[dick_barton]

Re: samsung ue32c5100 not power no stand by

What voltages are you getting on ICS801 (STR-W6052S)

[sordids999]

Re: samsung ue32c5100 not power no stand by

0.15 volts but slowly dropping

[dick_barton]

Re: samsung ue32c5100 not power no stand by

0.15 volts but slowly dropping

What pin is that on?

[dick_barton]

Re: samsung ue32c5100 not power no stand by

//

[sordids999]

Re: samsung ue32c5100 not power no stand by

i tested on all the pins

[budm]

Re: samsung ue32c5100 not power no stand by

0.15 volts but slowly dropping

That can't be if you do have 330Vdc on the main cap unless the trace to the transformer TM801 pin 3 is open or winding on pin 1/3 is open which I doubt that very much.
What did you use for GND?
One thing I would do on that board is to resolder all the transformer legs, all the legs of the devices mounted on the heatsinks.

[sordids999]

Re: samsung ue32c5100 not power no stand by

sorry my bad i hope this makes sense

pin 1 10.89 volts
pin 3 11.42 volts
pin 4 11.43 volts
pin 5 gnd
pin 6 11.43 volts
pin 7 318 volts

[dick_barton]

Re: samsung ue32c5100 not power no stand by

Pin 4 (VCC) needs to be a minimum of 13.8v to work.
You need to check the components linked to it.
ZDS801
CS805
RS802
DS802/3
to start with

[budm]

Re: samsung ue32c5100 not power no stand by

Leave the RED probe on pin 4 (VCC), Black probe on primary circuit GND (Negative leg of the main filter cap), then apply the AC to the board and see how high the DCV will rise up to.
There are two caps and Zener diode on pin 4, so if the Voltage on pin 4 does not rise up to the start up Voltage then it may be bad startup cap, leaky Zener diode, or cap, or bad charge pump circuit inside the IC, see diagram for details.