ly s1.6kv 54j

[budm]

Re: ly s1.6kv 54j

The schematic for the power supply-inverter board? I only see the diagram for the main board. Are you sure you are looking at the power supply-inverter board diagram? I sure like to see that.

[motormat]

Re: ly s1.6kv 54j

http://imgur.com/a/z58ju


Here is pics of everything I don't know much about this stuff I know basic soldering and components nothin crazy. I talked to LG support they supplied me with a part number 0CE107WF6DC. If need more pics let me know I already removed bad cap obviously lol thanks again to all who are trying to help.

[tjg79]

Re: ly s1.6kv 54j

On page 21 of the downloaded Service Manual pdf, in the upper left quadrant of the page, you should see the "FROM LIPS & POWER B/D" schematic. Caps C401 and C402 are on the left end of the schematic. They're both indicated as 100uF 16V. The OP didn't post good pics of the board with the bad caps, so from what I could determine, these are the caps, because they've got the correct capacitor numbers, 401 & 402.

[budm]

Re: ly s1.6kv 54j

On page 21 of the downloaded Service Manual pdf, in the upper left quadrant of the page, you should see the "FROM LIPS & POWER B/D" schematic. Caps C401 and C402 are on the left end of the schematic. They're both indicated as 100uF 16V. The OP didn't post good pics of the board with the bad caps, so from what I could determine, these are the caps, because they've got the correct capacitor numbers, 401 & 402.

You are way off reading the diagram.
Those are components on the MAIN board not the power supply board, as you can see that 25-pin connectors which is on the main board which will be connected to the power supply board white multi pin connector.
Those are dc filter caps.
Those two blue ceramic high voltage caps are connected to the HV outputs of the HV Inverter transformers, nothing what so ever related to C401, 402 filter caps on the main board.
C401 is the filter cap for the STBY Voltage it receives from power supply STBY output PIN that feeds the main board pin 9~12, C402 is the filter cap for the 12V/15 (pin 17, 19, 21) it receives from the power supply board, you can see the white multi pin connector on the power supply board..

[budm]

Re: ly s1.6kv 54j

I emailed tech support a picture of cap c402 asked for them to explain as to why the manual reads them to be the same but indications on each cap are diffrent hopefully I can get this figured out lol. Is it posible to replace a blue ceramic with the one they gave me part number for.

Better be careful giving the right information to any one. Those caps you are referring to in the service manual are for the caps on the main board, nothing what so ever has to do with those two ceramic caps in the inverter circuit of the power supply-inverter board.
You can have two or three or four circuit board with the same component designator but they are not the same parts, you need to match the part desigantor to the schematic of the board you are looking and working on.

[tjg79]

Re: ly s1.6kv 54j

I knew it wasn't making sense and the posted pictures left a lot to be desired. It's unusual to find a unit with caps with the same "c" number. Perhaps that's why LG didn't post a parts list in the SM. They may have cobbled this unit together in a rush to get it to market. There were a lot of unanswered questions in my mind. So, my advice was to get it resolved with LG Support. The OP's first contact with LG Support, which resulted in a cap part number, didn't make sense either. So, I suggested he contact LG again and speak to someone with technical knowledge, and provide the bad cap board's part number, because I thought he spoke with a customer service rep that just gave the wrong cap part number.

[motormat]

Re: ly s1.6kv 54j

Sorry for all the confusion guys I'm new don't really know what to do I may just look into getting a new power board I have no idea how to find the part thanks for all the help though.

[budm]

Re: ly s1.6kv 54j

'It's unusual to find a unit with caps with the same "c" number. They may have cobbled this unit together in a rush to get it to market' That is not true at all, the service manual you have does not contain any info about the power supply board so there was no P/N for any components, designators for the power supply board, most TV service manuals that we deal with hardly put the schematic of the power supply and most of the use OEM power supplies not designed by the TV companies so they are not allowed to published the diagram, it will be great if EVERY companies will provide all the details for their products which will make it easy for us to repair the products. Some of the so called service manuals do not contain any diagrams at all.
You can have power supply board P/N XXX with cap desinator C1, resistor R1.
Then you can have Inverter board P/N XXX with cap desinator C1, resistor R1.
Then you can have Main board P/N XXX with cap desinator C1, resistor R1.
Then you can have T-CON board P/N XXX with cap desinator C1, resistor R1.
Then you can have Remote IR board P/N XXX with cap desinator C1, resistor R1.
Then you can have Balancer board P/N XXX with cap desinator C1, resistor R1.
Then you can have FRC board P/N XXX with cap desinator C1, resistor R1.
And on and on.
As you can see the designator of one board as listed for the particular board has nothing to do with other board. You have to look at the schematic of the board you looking at and the part list of the board you are looking at.
If you design products with many boards then you will understand how it is organized.
You were looking at the parts on the main board but trying to apply the designators of the part to the power supply board.
Like I request, where is the pictures of the bottom side of the board so we can how those two caps are connected to the secondary side of the board.
By the way when asking question you need to provide the PCBA number of the board to match the correct schematic and the revision of the PCBA you are working on, not the PCB P/N.
We know that one cap is 22pF and another cap is 54pF but we do not know how they are connected, so we need pictures.
BTW, ceramic cap failure mode is either leaky or shorted out.
This is an example of failed Ballast caps:
http://s807.photobucket.com/user/bud...?sort=3&page=1

[motormat]

Re: ly s1.6kv 54j

http://imgur.com/a/z58juHere are pics

[tjg79]

Re: ly s1.6kv 54j

I've got several LG Service Manuals for computer monitors. They all have the power supply board indicated and a complete parts list. I would think LG would follow that pattern for their consumer electronics. Most have a complete one page schematic. I've never seen two components or devices with the same number on a complete one page schematic. One of the problems with download Service Manuals is that sometimes they are not complete. I thought this SM was a POS.

It's very annoying when a manufacturer doesn't supply a complete all in one service manual for a consumer item.

All of the service manuals that I have seem to follow a pattern of using different series numbers for the different boards. The power supply board may be in the 100 to 200 series and the other boards will use different series. I don't have any that have the same component or device numbers on different boards.

So, without doing a complete analysis and requesting specific pictures, I though the simplest first approach to get the questions resolved was to contact LG Support and speak to the right person.

[budm]

Re: ly s1.6kv 54j

Big glare in the interested section of pictures, too hard to trace the connection.

[motormat]

Re: ly s1.6kv 54j

http://imgur.com/a/EOhRf

[budm]

Re: ly s1.6kv 54j

Thanks! on the white CCFL connector I can see two pink wires, on the Black connector, how many wires are there on that connector?

[motormat]

Re: ly s1.6kv 54j

Down by c402 and 401 ? I'll check soon as I get home at 2oclock

[budm]

Re: ly s1.6kv 54j

See marked pictures, so far it looks like those two caps are not the same capacitance, the burnt one has higher capacitance, 54pF.

[motormat]

Re: ly s1.6kv 54j

It is 1 pink wire

[motormat]

Re: ly s1.6kv 54j

Here is a picture to where they lead if that helps.

[budm]

Re: ly s1.6kv 54j

Two feeding wires and one common return wire.
Is there a sticker on the LCD panel showing the make and model of the panel?
You can use the cap that TJG recommended.
http://www.mouser.com/ProductDetail/...llgYhaXQ%3d%3d

[motormat]

Re: ly s1.6kv 54j

Here's a pic of what's on the back thanks so much you guys I sure hope this works.

[tjg79]

Re: ly s1.6kv 54j

Does LG have a part number for that cap?