Re: Needs caps for my 22" lcd
Okay, I seemed to have dropped the ball with this whole thing after progressing very well. I'm deciding to pick back up where I left. I (we) seemed pretty certain it was my bulbs or soldering to the bulbs that were the issues. Either way, we've narrowed down everything else leading to faulty bulbs.
I am going to be purchasing them tonight. I just want to make sure I get the right ones. It is as simple as measuring the diameter and and length and buying a bulb with identicle measurement ?
Seems I can buy there here:...
Nicks84
Member
Last Activity: 12-24-2014, 07:25 PM
Joined: 02-22-2011
Location: Orlando, Fl
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Re: Needs caps for my 22" lcd
Links were very helpful. Unfortunately, the removal of the my ccfl's were much different that the link above so I had a hard time getting to them. Well, I suppose "much" is relative. In anycase I had trouble accessing them.
I ended up pulling lcd apart to get to the ccfl's . . . I think I pulled the lcd apart way more than I had to.
I realized that upon pulling them out Perhaps I will document my steps for the next poor sap like me with an lcd like this one.
...Leave a comment:
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Re: Needs caps for my 22" lcd
Okay, steps for troubleshooting above are good. However, I have 2 problems concerning that:
1)do not happen to have a known good set of ccfl's laying around of the same size/type.
2) I do not see how to get to remove or the ccfls from the Westinghouse
Moving onward, I did find an LCD in the trash the other day. It's a Dell E172fpb. I did not expect it to work, but I was hoping that maybe the lamps were good (and they are)
I plugged up the Dell and get no kind of power, no led,...Leave a comment:
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Re: Needs caps for my 22" lcd
For X-former A:
1 - 8: 365 Ω
1 - 9: 364 Ω
They measure pretty much the same. I guess by this, they are either both good or both hosed ? What to do next, boss ? Do I need to remove and measure ?...Leave a comment:
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Re: Needs caps for my 22" lcd
1) Yes, I have 11 pins on the X-former. I labeled the Primaries 1-7 & Secondaries 8-11. (see pic below).
Nothing on the transformer did me any good. Not even a Google search yielded results, but here ya go:
2874001100
M F 628 A
(The other X-former is the exact same as you can see below, just labeled what seems to be marked "B" on the bottom right. Where as the 1st X-former is marked "A". But under close inspection, I really can't tell if they're both supposed to be...Last edited by Nicks84; 04-02-2011, 05:45 AM.Leave a comment:
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Re: Needs caps for my 22" lcd
The resistance between red pins and yellow pins both read .7 Ω & .8 Ω
And on this meter that I am using, we have discussed in the previous post, that's about as low as it goes.Leave a comment:
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Re: Needs caps for my 22" lcd
I'm an idiot. I made the [b]assumption[/b] ([i]and a bad one at that[/i]) that the drawing from the data sheet (top & bottom view which showed the notch at the bottom & dot at bottom right), correlated withe the image directly next to it (pin diagram)
I was wrong. Consequently it resulted in my chip being measure upside down. So my readings were not what they claimed to reflect. I have since updated the new ones in my previous post.
[b]I had no idea what I was doing either[/b], but I figured it couldn't...Last edited by Nicks84; 03-25-2011, 11:32 PM.Leave a comment:
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Re: Needs caps for my 22" lcd
1)
a)Craftsman (Auto-ranging Multimeter) 82139 (see pic).
b)I have another yellow one that does read more accurately as far as resistance goes. I had it just days ago, but cant find it atm. Either way, it's a cheap Wal-mart special and can't recall the name.
2) .5 - .7 Ω is the lowest I get when I touch the probes together on an Ω test. I know that is not ideal, and I'm not sure why it is that high. But I got the meter from my cousin, for free. The probes are Fluke and do not seem to be damaged....Last edited by Nicks84; 03-25-2011, 09:24 PM.Leave a comment:
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Re: Needs caps for my 22" lcd
Ok, so I ordered the MOSFETS, and they came in today
BUT, they measure the exact same as the ones that were suspected to be shorted
Could it be possible I measured them wrong?
I referenced the pins according to the drawing, dot and notch at the bottom as shown in the drawing. I used the data sheet found here:
I referenced this also:
In anycase, It still does the same thing even after installation of the new MOSFETS (U202 & U203). Powers on (or blips on rather),...Leave a comment:
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Re: Needs caps for my 22" lcd
Also, I forgot to ask. Is there a certain brand I want to stay away from (or get, rather)?Leave a comment:
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Re: Needs caps for my 22" lcd
Ok, pulled them out. Talking about a board crisis.
The 1st one came out with very little issues. Well, that is, one pad came off. Seemed the original solder just gummed up and didn't seem to want to wicked or sucked up. I did add fresh solder and all of it came off, except the fraction that was gummed :-? I could not seem to get it to merge. Anywho, the pad came off on a couple, and then like 1/2 way on a couple
The 2nd one, seems all the legs were like that. But no pads came off completely, but they are all...Leave a comment:
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Re: Needs caps for my 22" lcd
Ok, I tried. My readings are as follows, for
*All readings were with components in the board, not powered.*
Mosfet U202
a) black on (pin 3) S1- red on pin G1: .6 Ω (pin 4)
b) black on (pin 3) S1- red on pin D1: OL & OL (pin 5 & 6)
c) black on (pin 4) G1- red on pin D1: OL & OL (pin 5 & 6)
Repeat for the "2" pins. That is:
(pin 1) S2-G2: .6 Ω (pin2)
(pin 1) S2-D2: OL & OL (pin 7 & 8)
(pin 2) G2-D2: OL &...Last edited by Nicks84; 03-18-2011, 11:25 AM.Leave a comment:
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Re: Testing Fets
It never dawned on me to ask you how I was supposed to determined if they are shorted. I can ohm them out, I know, but I'm slighty unfamiliar with its data sheet. I'm not sure how many readings I should take. Should I test for voltage or just stick with impedance? And should I removed the component or test in the circuit? Do I just ohm out in the board first, then go from there based upon that data?
Also, concerning the Fets (not the ones by the inerter trans) I think I got those under control. Thanks.
Also, in the event that I need...Leave a comment:
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Re: Needs caps for my 22" lcd
Thanks RC
I will see what I can do and up my results once I am done. LOL, also, I will try upping pics with a better camera next time....Last edited by Nicks84; 03-09-2011, 11:03 PM.Leave a comment:
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Re: Needs caps for my 22" lcd
I have checked the fuse, and it checks out as it's supposed to, < 1Ω. Reads right at .9Ω to be exact
I assume you are talking about these (referring to the Mosfets) ? [url]http://search.digikey.com/scripts/DkSearch/dksus.dll?lang=en&site=US&WT.z_homepage_link=hp_go_button&KeyWords=stps10h100cfp&x=16&y=17[/url]
I only ask because (referencing from my pic), the Inverter transformers are on the top left (above the large cap), yes ? The 2 other electrical components...Leave a comment:
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Re: Needs caps for my 22" lcd
Okay, replacement caps came in today. I have successfully replaced all of them, excluding the big one. I still have a problem, but a few symptoms that were present before, are now gone :-)
But lets back track a bit. From the beginning. This was my initial problem [b](phase 1)[/b]
[url]http://www.youtube.com/watch?v=KQ_Q4mf2QdQ[/url]
After running it like that for a a month, it totally croaked on me [b](phase 2)[/b]. Upon powering on, it would turn on normally for a few seconds (no more than 5). After which...Leave a comment:
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Re: Needs caps for my 22" lcd
OK, where to start...lol. I spoke to a cousin of mine that said he could get me caps, as he works in the stock room for the Electronics dept at his College. This was before I joined this forum. He got what he could for me, but I ended up with 5 Axial caps(out of 9) even though I specified radials. (that was today
). So, concerning that. Other than just bad practice habits and spacing, how bad of an idea would it be to just use the Axials and route one lead down the side of the cap, into the mounting holes like normal ?
On to...Leave a comment:
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Re: How to Open Case on Westinghouse LCM-22W2
Did you use to tool to unsnap the clips at the bottom? There are like 6 of them. To pop them open, just push the tabs in with a small screwdriver (or anything that is small and stiff enough), you have go through the slits. They will make a popping sound when they come unlatch and the 1/2 will separate slightly. Work you way across the board till you get all of them othewise if you just pry it open, you will break the tabs. But I suppose it's not the end of the world. The top does not have them so it just opens like a suitcase once the...Leave a comment:
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Re: How to Open Case on Westinghouse LCM-22W2
Did you use to tool to unsnap the clips at the bottom? There are like 4 or 5 of them. To pop them open, just push the tabs in with a small screwdriver (or anything that is small and stiff enough), you have go through the slits. They will make a popping sound when they come unlatch and the 1/2 will separate slightly. Work you way across the board till you get all of them othewise if you just pry it open, you will break the tabs. But I suppose it's not the end of the world. The top does not have them so it just opens like a suitcase once...Leave a comment:
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Re: Westinghouse L2410NM 24" LCD power goes on and off, blue light flickers
I have a 22: lcd from Westing house. We have the same problem. I posted a video on Youtube.
[url]http://www.youtube.com/watch?v=KQ_Q4mf2QdQ[/url]
After lots of searching around (and time), I find it is very likely bad caps on the Power supply.
It was exhibiting the same symptoms as yours, but eventually died and now will not power on (this is not shown in the video). It was hit and miss. Sometimes it woudl work and sometimes not.
Now when...Leave a comment:
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