Re: ly s1.6kv 54j
I'm not certain that C402 is a 1600VDC cap.
The first step is to identify what the OEM installed if possible. I think the resources are available to do that.
C402 & C401 could be SL6KV. If that's the case, then the 6300VDC rated cap is the best choice.
tjg79
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Last Activity: 01-10-2022, 01:14 AM
Joined: 09-08-2013
Location: Virginia
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Re: ly s1.6kv 54j
The inscription on the burnt cap is difficult to read clearly. That is why you should get a confirmation by requesting the part be researched. Did you request the part be researched? I originally thought it read SL6KV, because "L" and "1." are very similar, S1.6KV didn't appear in searches, and I did get at least two results that showed a SL6KV, although different capacitance. However, after looking at your pictures again more closely, I think you are correct as indicated in the title of this thread. I think it's clear that C401...Last edited by tjg79; 02-10-2016, 12:55 PM.Leave a comment:
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Re: ly s1.6kv 54j
I noticed that, but they do indicate a price for one and they might backorder....Leave a comment:
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Re: ly s1.6kv 54j
Also, after looking at your pics of the C402, I now think it reads LY S1.6KV 54J as your originally noted.
Therefore, I don't think it's a 54pF 6000V 5% Tolerance High Voltage Ceramic Cap.
I think it's a 54pF 1600V 5% Tolerance High Voltage Ceramic Cap.
A better replacement is indicated on the link below.
These are 56pF 2000V 5% Tolerance High Voltage Ceramic Caps. They are closer to the original spec than what I indicated before.
[url]http://www.mouser.com/Passive-Components/Capacitors/Ceramic-Capacitors/_/N-5g8m?P=1z0x638Z1yp7xv5Z1z0z7l5Z1z0wuod[/url]...Leave a comment:
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Re: ly s1.6kv 54j
Parts Research Request:
[url]http://www.encompass.com/staticpages/Contact_Model_Research[/url]
The above link is likely your best hope of getting the capacitor's part number and specs from LG. Encompass is the authorized LG parts distributor.
You need to be very specific and supply the correct information as budm indicated. You want to supply the TV model number and serial number, the power-supply inverter pcb assembly part number, and the capacitor number, in this case C402. While your at it, you could request C401...Last edited by tjg79; 02-09-2016, 10:42 AM.Leave a comment:
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Re: ly s1.6kv 54j
You should call them back and tell them they gave you the wrong part number, and get the correct part number.
Tell them that there are caps with the same number on different boards and they didn't give you the cap on the power inverter board. Whomever you spoke with was likely looking at the wrong cap. You should speak with a tech and not a customer service rep.Leave a comment:
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Re: ly s1.6kv 54j
Does LG have a part number for that cap?Leave a comment:
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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...Leave a comment:
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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,...Leave a comment:
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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.Leave a comment:
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Re: ly s1.6kv 54j
For some reason, the Service Manual doesn't have a parts list detailing the PCB components. I have a couple LG monitor Service Manuals, and they do have a parts list that indicates PCB component parts numbers and specs.
I've checked the Service Manual from two different download sites and neither have an included parts list.
The Service Manual does have the schematics and the schematics do show caps C401 and C402. They're both indicated as 100uF 16V caps, presumably electrolytic caps. LG Support supplied a cap part number for C402...Leave a comment:
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Re: ly s1.6kv 54j
When you contact LG, you should be very specific and give them the model number and serial number of the TV/Monitor unit, the board with the bad cap model number, part number, serial number, etc..., and the cap numbers in question. In this case it's C401 and C402. Good pictures detailing the above information as well as the Service Manual version you have and excerpts from that manual that show the inconsistent information.
I wouldn't recommend replacing that ceramic cap with anything other than an exact replacement at this point...Last edited by tjg79; 02-06-2016, 08:26 PM.Leave a comment:
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Re: ly s1.6kv 54j
I would hold off on buying a replacement cap until you get an explanation from LG that explains the differences between the Service Manual and the actual hardware that makes sense. You should also get them to confirm the maker of the installed caps and download the cap's datasheet to confirm the numbering system and what you are seeing installed on the PCB....Last edited by tjg79; 02-06-2016, 02:12 PM.Leave a comment:
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Re: ly s1.6kv 54j
OK, so there is no discrepancy between your TV model number and the Service Manual model number.
Call LG Support and have them explain the cap label and the Service Manual description depicted in the schematic.
It's not unusual for service manuals to not be correct or production changes.
If you can get a LG Tech Support guy to give you his email, you should send LG Support pictures of the board and the C401 and C402 caps and the page of the service manual with the circuit schematic and have them expl...Last edited by tjg79; 02-06-2016, 01:57 PM.Leave a comment:
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Re: ly s1.6kv 54j
The picture of C401 looks like LY.S1.6KV22J. If that's the case and my understanding of that cap number system, C401 would be a 22 pF 1600 V 5% Tolerance High Voltage Cap.Leave a comment:
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Re: ly s1.6kv 54j
The download Service Manual doesn't have a parts list as is typically included in Service Manuals.
Contact LG Support and see if they well send you a Parts List for your Model TV. Tell them you want a complete parts list to include PCB components and devices.
This cap replacement/TV repair requires more research to ensure you are replacing the bad cap with a proper good cap.
You should also discuss the discrepancies in the model service manual schematics and the actual hardware with LG Support and have...Leave a comment:
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Re: ly s1.6kv 54j
Post the link of what you are seeing online.
The downloaded Service Manual indicates they are the same specs, but your pictures seem to indicate that the installed caps are different specs....Leave a comment:
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Re: ly s1.6kv 54j
From comparing the two pictures of caps C401 and C402, and from my current understanding of their label, I think the installed caps are different. C401 appears to be a 22 pF 6000 V 5% Tolerance High Voltage Capacitor.
The downloaded Service Manual does have a different Model Number suffix. But, I wouldn't think that it would be that different from your posted Model Number TV.
This cap replacement requires more research to resolve the discrepancy and assumptions....Leave a comment:
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Re: ly s1.6kv 54j
I looked up cap C402 on the schematic in the Service Manual, and it does indicate C402 as a 100 uF 16 V cap. However, I don't think that cap inscription is a 100 uF 16 V cap. Check the inscription on cap C401. From you picture links, I don't see that C401 shows indications of heat, so it may be easier to read. From the schematic, C401 and C402 are the same specs.
Then, you should find a spec sheet for that cap. The Service Manual doesn't have a parts list with LG part numbers.
I recommend you call LG Support and ask for the part number...Last edited by tjg79; 02-06-2016, 04:08 AM.Leave a comment:
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Re: ly s1.6kv 54j
I Google'd that part number and I suspect that's a ceramic cap.
Check the cap closely and see if it should read: LY SL6KV 54J.
If that's the case, I don't think that's a 100 uF 16V cap.
It might be something like a 54 pF 6000 V 5% Tolerance High Voltage Ceramic Cap.
If that's the case, then the cap on the link below would likely be a good replacement.
Murata 56 pF 6300 VDC 5% Tolerance High Voltage Ceramic Cap, Murata Part # DEC1X3J560JC4B
[url]http://www.mouser.com/ProductDetail/Murata/DEC1X3J560JC4B/?qs=TK990AyXWSeaPKllgYhaXQ%3d%3d[/url]...Last edited by tjg79; 02-06-2016, 04:11 AM.Leave a comment:
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