please help me fix my 46' samsung tv

[justin870]

model # LN46C750R2F
model code is LN46C750R2FXZA

Samsung LN46C750 46" 1080p 3D LCD HDTV

symptoms are the standby light is on but the TV screen will not come on.

[budm]

Re: please help me fix my 46' samsung tv

Here is the diagram of the power supply board BN44-00341B.
Do you know how to read schematic?

[justin870]

Re: please help me fix my 46' samsung tv

I thought I did but the schematic is more complex than what Ive looked at in the past. I have little experience with electronics but I am learning.

[budm]

Re: please help me fix my 46' samsung tv

OK, then you need to take DC Voltage readings on each pin of connector CN802, and CNI802 when TV is plugged in but not turned ON , and when the power switch is activated. Use chassis as a Ground ref for your meter.
Make sure to list the name of each pin also.

[justin870]

Re: please help me fix my 46' samsung tv

What is that thing called that I took a picture of on the power board. It looked to be bad because I saw leakage on the other side of the power board where it was located. I would go ahead and replace it but I don't know what it is called lol.

[budm]

Re: please help me fix my 46' samsung tv

Are you talking about white adhesive for holding the parts in place? Which pictures, you have several pictures of the power board?

[justin870]

Re: please help me fix my 46' samsung tv

im getting .12ma for each and i'm talking bout this pic...the copper color coil thing

[justin870]

Re: please help me fix my 46' samsung tv

what do you thing the problem is?

[vinceroger69]

Re: please help me fix my 46' samsung tv

can you post a picture of the multimeter your using so we can see which holes the probes are in (if more than 2) also we can check what settings you have it on. also remember capacitors can still hold a charge when the set is turned off so be carfull also the heatsinks on the power supply can give you shocks as well when the set is powered on. we will try to help but we need to consider your saftey too.

[justin870]

Re: please help me fix my 46' samsung tv

got it set on dc mA

[tom66]

Re: please help me fix my 46' samsung tv

For now, set your meter on DC volts only, and concentrate on the connector which connects the main board (the board with the video inputs on it) and the power board (the board where the power lead connects to.) Take measurements of each pin voltage and report them back, use numbers if they are available near the connectors or if not, use a picture and label it for us.

[budm]

Re: please help me fix my 46' samsung tv

Well I hope you did not try to check the dc voltage setting in the mA mode, the fuse in the meter may have been blown now.
Check an AA/AAA batteries to see if the meter will still show 1.5Vdc.

[justin870]

Re: please help me fix my 46' samsung tv

ok meter works....i Have it set on dc volts..what pins will I test,specifically where do I put my leads to start out?

[mmartell]

Re: please help me fix my 46' samsung tv

budm already told you in post#4. If you don't understand those instructions ask specific questions and you will get the help you need.