Re: Samsung ps51d6900 dk will not switch on
Hi tom
Sorry for the delay in getting back to you.
I have had a look and can't see any burnt resistors!
with regards to the fuses, as in a small standard fuse that you would find in a plug..... I cannot see any on that board just one on the power supply board?
Thanks again for your help.
Chris
Miller r5
Member
Last Activity: 08-18-2014, 05:57 AM
Joined: 06-09-2014
Location: Ayrshire
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Re: Samsung ps51d6900 dk will not switch on
Hi tom
Unfortunately this has not worked, I have redone your test as before and the results are the same. The only thing I did diferantly was before I powered it up I kept the ribbons disconnected to do the tests first without the screen connected and it was the same as before. I then connected the ribbons and done all the tests again and it gave the same results.
1. VS-ADJ = starts at 207v then drops to under 10v (same as before)
2. VSCAN = holds a solid -187.3v then after about 15 sec drops right off (it...Leave a comment:
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Re: Samsung ps51d6900 dk will not switch on
Cheers for getting back Tom, I have ordered the board and will let you know how it goes.
[url]http://www.ebay.co.uk/itm/190938622901[/url]
Cheers
ChrisRe: Samsung ps51d6900 dk will not sw...rs<br /> ChrisRe: Samsung ps51d6900 dk will not switch on
Cheers for getting back Tom, I have ordered the board andLeave a comment:
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Re: Samsung ps51d6900 dk will not switch on
so is their anything else I can test to confirm it's the y-main at fault?
Can I test the screen in any way?
or is it a case of replace the y-main and see if it works but might not last?
The y-main board is about 25 delivered with a return policy, is it worth the risk?
Cheers for all your help
Chris��Leave a comment:
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Re: Samsung ps51d6900 dk will not switch on
Hi tom
Is this what you wanted tested?
I also removed the buffer board and it's still ok.
Do you have anymore ideas and thanks for all your help.
Cheers
ChrisLeave a comment:
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Re: Samsung ps51d6900 dk will not switch on
I removed the ribons on the left hand side and I'm getting nothing on VSC-OUTL to VSC-OUTH volts or ohms.
Is that the points you want tested?Leave a comment:
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Re: Samsung ps51d6900 dk will not switch on
Hi tom
Do you have anymore ideas?
Cheers
ChrisLeave a comment:
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Re: Samsung ps51d6900 dk will not switch on
Ok with all the ribbons on the left hand side removed, I am still getting no volts across those points.Leave a comment:
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Re: Samsung ps51d6900 dk will not switch on
Just removed the boards and it has no shorts.Leave a comment:
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Re: Samsung ps51d6900 dk will not switch on
Hi tom
Unfortunately this has not worked, I have redone your test and the results are as follows
1. VS-ADJ = starts at 207v then drops to under 10v (same as before)
2. VSCAN = holds a solid -187.3v then after about 15 sec drops right off (it did this the last time but quicker)
3. VSC-OUTL TO VSC-OUTH = nothing with the power on or off, volts or ohms.
Does this point to the screen or something else?
Cheers for your help
ChrisLeave a comment:
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Re: Samsung ps51d6900 dk will not switch on
I will try it and see how it goes, I'm hoping the fact that it's lasted this long after taking the knock, that it will at least last the same length of time, as this is new and not been bumped.
I will test the new board before I fit it, it it blows straight away at the same point then I know the screen has had it.
The part is arriving tomorrow and I will keep you updated👍
Do you have any links to the voltage setup if the new board works?
Also do I need to test anything...Leave a comment:
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Re: Samsung ps51d6900 dk will not switch on
I have found a NEW board and as something this delicate I would prefer new. The only thing I can see differently is the rev and date would this be a problem?
[url]http://shop.sjstv.co.uk/lj92-01809a-lj41-09429a-new-2525-p.asp[/url]
CheersRe: Samsung ps51d6900 dk will not sw...25-p.asp[/url]...Leave a comment:
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Re: Samsung ps51d6900 dk will not switch on
Hi tom
I have removed and tested the panel per the link and found the second top set of wires to be faulty. Only the first three from the probe in the attacheched picture. Does it just take one to be at fault to loose the whole screen?
Would I be right to assume the position of these wires run the full lenth of the screen? then this is roughly where the crack is!
Cheers
Chris...Leave a comment:
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Re: Samsung ps51d6900 dk will not switch on
So avoid the ones saying they are from a new TV with cracked screens unlees they offer a full refund if the part does not work.
Looking on eBay, it has massive amount of them ranging from £10-50, just need to see what one offers the best warranty!
This TV has a very small crack in the glass from 6 months ago when it got hut by a yo-yo, so could that be what has caused it to fail then.
Thanks again ChrisLeave a comment:
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Re: Samsung ps51d6900 dk will not switch on
Ok will I just order one or would you recommend I double check?
Thanks for the info on the voltage, I will look into that when I fit my new board.
Would it just be wear and tear that caused this fault or something else?
Thank for all your help, I was going to buy a power board today so that would have been a waste of money.
Thanks again
ChrisLeave a comment:
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Re: Samsung ps51d6900 dk will not switch on
This is it.
[url]http://www.fluke.com/fluke/m3en/electrical-testers/Electrical-Testers/Fluke-7-600.htm?PID=56125[/url]
I will get another meter tomorrow to confirm.
Cheers
ChrisRe: Samsung ps51d6900 dk will not sw...s<br /> ChrisRe: Samsung ps51d6900 dkLeave a comment:
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Re: Samsung ps51d6900 dk will not switch on
I used this meter for years and has been reliable as I use on for automotive and house electrics.
So if it's reliable can we safely say it's the buffer board?
Can we do any other tests to confirm?
Do you know what can cause this?
Would this have anything to do with the red/pink tinge on white backgrounds that I had noticed lately?
Sorry for all the questions, you have been a great help and it's much appricated😀
Cheers
ChrisLeave a comment:
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Re: Samsung ps51d6900 dk will not switch on
With the power off i am getting 19.7ohms then when holding the probs on and powering up the TV it momentarily changes to volts but gives no reading (fluke automatic selection meter) and then changes back to show 21.8 ohms for 5 seconds or so then returns to 19.7ohms.
Cheers
ChrisLeave a comment:
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Re: Samsung ps51d6900 dk will not switch on
And finally...Leave a comment:
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Re: Samsung ps51d6900 dk will not switch on
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