emerson LC320EM9 Blinking power light

[bobbyd40]

Re: emerson LC320EM9 Blinking power light

Sorry meant resistor not diode

[high-tech]

Re: emerson LC320EM9 Blinking power light

That diode is causing your problems in the inverter on circuit, after the first one I found I ordered a bag of 50 of them from china for 2 dollars free shipping on ebay...

YOU'RE WELCOME

[bobbyd40]

Re: emerson LC320EM9 Blinking power light

Sorry meant resistor

[bobbyd40]

Re: emerson LC320EM9 Blinking power light

Thanks high-tech

[high-tech]

Re: emerson LC320EM9 Blinking power light

Your TV is doing what I call the classic Funai shuffle

When you press the power button the main board sends a signal to turn the power supply/inverter on and the inverter/ power supply in turn sends a feed back signal to main board telling it i'm on and everything A OK.

When the main board does not get this feed back it does the Funai shuffle "flashing power led".

I don't think the burnt resistor is related to the problem, and its possible you may have caused that resistor to fail... IDK

I hope this helps and always check the diodes around the Transformer on the main board first. You can test all of them in circuit, you don't need to pull them.

[bobbyd40]

Re: emerson LC320EM9 Blinking power light

Thanks high tech will have to wait until i find that resistor.

[G Nicholls]

Re: emerson LC320EM9 Blinking power light

I am also repairing a Emerson LC320. Thanks to tom66 for posting the service manual.

My unit has all the correct voltages at CN301 as advised in the prior post. However, there is no 3.3 volts present at CN301 pin #3 (backlite sw.) So, no successful power-on-self-test. The 30 volts for the inverter never cycles on.

Visual inspection of all boards O.K. Pulled and checked the 30V section caps with a ESR meter. O.K. Checked all power section diodes for open or shorts. O.K. Did a basic check on the 30V N-Channel MOS driver (K3561), and the four MOSFETS that drive the inverter transformers. They seem O.K.

So the problem is no inverter section power-up. I did solder a wire to CN501 pin #3, backlite switch, and placed a 3 volt battery on it to force the inverter on. It did not help. In fact, the voltage across the battery dropped to .38 volts when I put the AC power to the unit. I wonder if that is due to Q1971 & Q1972 in the protection circuit. I am a bit over my head at this point.

Any help would be much appriciated.

[tom66]

Re: emerson LC320EM9 Blinking power light

Did I post it... I don't think I did... However I will upload the manual budm sent.

[G Nicholls]

Re: emerson LC320EM9 Blinking power light

By golly, that was budm.

Well, thanks to both of you. I sure learn well from your shares. Great community here. Barkeep...another round for my friends!

[solderfly]

Re: emerson LC320EM9 Blinking power light

I have the same problem. Was there a solution?

[cequil32]

Re: emerson LC320EM9 Blinking power light

From what I see on here there seems to be a diode that needs to be replaced.

I just got a tv that is doing this and will be trying to figure out which one as well.

Looks like there is a diode in the circuit that tells the main board the inverter is on, which I believe is probably on the main board since I have tried replacing the inverter board already. If someone has some insight it would be appreciated.

Thanks!

[cequil32]

Re: emerson LC320EM9 Blinking power light

My model is the LC320EMX, does anyone have a service manual for this? My model seems to be a little different than the one posted.

[klunker]

Re: emerson LC320EM9 Blinking power light

is it bad that i have 340+v at red and black plug on power board

[mark6822]

Re: emerson LC320EM9 Blinking power light

I'm new to this forum But i have an emerson LC320EM9 B LCD TV with the very same problem.I took a picture of the board so you could see what the problem could be and to point me in the right direction as to where i can get replacement board.This board has to be the problem There are 2 dark burn spots.the numbers on the board are BA8AF0F01032.The other no. are C7A3/A3.Any help would be greatly appreciated.Thank you

[Fortsam]

Re: emerson LC320EM9 Blinking power light

Had this same problem. Used ShopJimmy kit 1FSA10474. It had the mosfet and diodes I needed. And thanks to BUDM for the schematic found were everything went.

[retiredtech30]

Re: emerson LC320EM9 Blinking power light

here is the technical training manual for this set