Emerson LC401EM2F

[Mark369]

Re: Emerson LC401EM2F

Thank you for your help. I will post back when I put new zener in.
just for my own info is that zener in the 5v area.

[budm]

Re: Emerson LC401EM2F

I would NOT try to run it without that Zener in place, you may take out the standby power supply IC. Just inspect all your solder works when you put all those parts back in place.

[Mark369]

Re: Emerson LC401EM2F

Do you think that is the only thing that went bad or should look at any thing eles. Now when I plug it in the light lights flickers 2 or 3 times. Then goes out and red led comes on. When I press power I here click and led flashs 3 to 5 times. then click the led go full on. I forget what the lamp is doing when this is going on.

[budm]

Re: Emerson LC401EM2F

You may have to go with 3W instead, the 1m200z is non-stock item at MOUSER.
http://www.mouser.com/ProductDetail/...BzeAQSyJzOmd5c

Or NTE:
http://www.mouser.com/ProductDetail/...9IJ%252bln07LW

[Mark369]

Re: Emerson LC401EM2F

Not that this will help you but I have the same exact model TV that was given to me last week, it has a cracked LCD Panel but powers on and everything works. Here's a picture of the power supply board.

yes that is what mine looks like. You could sell it. On ebay its like $100

[Mark369]

Re: Emerson LC401EM2F

Do you know where I could get a zener that will work I have looked around a bit but not sure what will work.

[MisterD]

Re: Emerson LC401EM2F

Not that this will help you but I have the same exact model TV that was given to me last week, it has a cracked LCD Panel but powers on and everything works. Here's a picture of the power supply board.

[budm]

Re: Emerson LC401EM2F

Yes, you should match, here is the spec from MOUSER:
https://cdn.badcaps-static.com/pdfs/...8c1e9b2eb7.pdf
It is 200V ZENER.

[tom66]

Re: Emerson LC401EM2F

Yes, it must be the right part.
Like a resistor, a zener has a value and that must be kept the same.

[Mark369]

Re: Emerson LC401EM2F

I have a a zener on old power supply from pc lcd screen. Im going to pull it and look up spec. Do it have to be exect match.

[budm]

Re: Emerson LC401EM2F

OK, short Zener Diode, that is the next component I was going to ask you to lift the leg, glad we found the culprit! Yes solder everything back in place but make sure to install new Zener 1M200Z, it is needed.

[Mark369]

Re: Emerson LC401EM2F

Yes. I found a dead short at D1208 all other shorts around it went away when I lifted a lag of D1208. Just need to put every thing back in and test. Yes or no.

[budm]

Re: Emerson LC401EM2F

Let me get this correctly, the lamp was still on when you remove the IC201 (STBY POWER SUPPLY)?

[budm]

Re: Emerson LC401EM2F

Oh, I forgot about your post, let me look at the sch again.

[Mark369]

Re: Emerson LC401EM2F

So I there must be a dead short in the area of the 1200 series parts.
Could some one tell me if my thinking is right.

[Mark369]

Re: Emerson LC401EM2F

I did removed ic1201 before I removed D1201 to D1204

[Mark369]

Re: Emerson LC401EM2F

D1201 to D1204 turned light off
but as far as I can tell they test good

[Mark369]

Re: Emerson LC401EM2F

Yes

Sorry dam phone.

[budm]

Re: Emerson LC401EM2F

We want to lifting component till the lamp does not stay on full bright any more. With most of the components we removed so far. there is not much else that will draw so much current to make the lamp to be lit up.

[Mark369]

Re: Emerson LC401EM2F

oh haven't tryed it yet. sorry was posting from my cell phone. must have posted twice.

I have lifted a lag of D1201-D1204 and they tested good reading only one way on diode mode. I tested these because they tested bad onboard. D1607-D1610 Test good onboard.