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Old 07-31-2012, 04:56 AM   #21
selldoor
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Default Re: Samsung 2233RZ "2s to blanck"

Picture is too small can you take one of YOUR transformer top and bottom.
They usually have 8 pins and test as attached.
Meter on 2000 ohms. Can test on or off the board - post results.
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File Type: jpg Darfontest.JPG (36.6 KB, 174 views)
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Old 07-31-2012, 06:16 AM   #22
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Default Re: Samsung 2233RZ "2s to blanck"

Quote:
Originally Posted by selldoor View Post
Picture is too small can you take one of YOUR transformer top and bottom.
They usually have 8 pins and test as attached.
Meter on 2000 ohms. Can test on or off the board - post results.

Ok, thank you for reply and attached image, I needed it. This evening I'll test it and report back.
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Old 07-31-2012, 11:11 AM   #23
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Default Re: Samsung 2233RZ "2s to blanck"

Ok, I uploaded the power board images. On the back of it there is a "bronzed" area...I wonder if that could be a problem.

I already bought a new TM-0915 transformer, because desoldering it I broke the magnet

I could post the resistance recordings, but I guess that without the magnet they're altered..All "S" contacts seem to be open, as the multimeter reads "1". The only two contacts that give a reading are P1 to P3 = 0.6ohms

Please let me know if photo quality is poor, so that I can take them again with a reflex camera.

Thank you for support.
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File Type: jpg IMG_20120731_182951.jpg (172.5 KB, 114 views)
File Type: jpg IMG_20120731_183538.jpg (96.3 KB, 107 views)
File Type: jpg IMG_20120731_183603.jpg (150.4 KB, 103 views)
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Old 07-31-2012, 11:30 AM   #24
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Default Re: Samsung 2233RZ "2s to blanck"

Quote:
Originally Posted by shineangelic View Post

I could post the resistance recordings, but I guess that without the magnet they're altered..All "S" contacts seem to be open, as the multimeter reads "1". The only two contacts that give a reading are P1 to P3 = 0.6ohms
.
That is a bit odd was meter on 2000 ohms? - try 20000ohms.

Can you still test and post the results for the other 2 transistors?

I will look over the pics later.
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Old 07-31-2012, 12:02 PM   #25
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Default Re: Samsung 2233RZ "2s to blanck"

Pictures will do for now - you have turned the board between each shot making it difficult to work out back to front where things are - tell me what is on the other side
of the bronzed part - doesnt look too bad. Did you put the yellow caps in? what brand and series are they?
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Old 07-31-2012, 03:09 PM   #26
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Default Re: Samsung 2233RZ "2s to blanck"

Quote:
Originally Posted by selldoor View Post
That is a bit odd was meter on 2000 ohms? - try 20000ohms.
It was on 200 ohms, because at 2000 the reading was 0. I confirm it, at 20K the reading is 0. All other contacts coupled give "1". I repeat, I totally broke the transformer magnet when I removed it. Lol, I read "SOLDER" and thought I had to solder there. I'm a moron.


Quote:
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Can you still test and post the results for the other 2 transistors?
Sorry which transistor? Do I have to read the resistance between base and collector? At 2000 ohms? Sorry I'm a complete noob at electronic repairs. Anyway, I'm quite determined because I payed much for this screen since it was one of first 120Hz 3D LCD available.

It seems to be typical 2sec to blank issue described on this thread by other users...I can see the pixels lighting the screen with a torch, it stays lit for 2-3 seconds and then backlights go off.
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File Type: jpg IMG_20120731_225512.jpg (544.0 KB, 127 views)
File Type: jpg IMG_20120731_225600.jpg (693.1 KB, 91 views)

Last edited by shineangelic; 07-31-2012 at 03:35 PM..
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Old 07-31-2012, 03:19 PM   #27
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Default Re: Samsung 2233RZ "2s to blanck"

Quote:
Originally Posted by selldoor View Post
Pictures will do for now - you have turned the board between each shot making it difficult to work out back to front where things are - tell me what is on the other side
of the bronzed part - doesnt look too bad.
sorry for that. I'm uploading detail of the bronzed part. Doesn't look too bad to me, too. The bronzed part is only a bit darker on the back of the board, near primary pins of the transformer and near right one (upper left transformer pins of first photo). On the board front no burns are visible (a part from my soldering mistake near the "SOLDER" label :/ ). The screen was used for about 6 hours per day for a year and half, then started going black after 2 sec.

Quote:
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Did you put the yellow caps in? what brand and series are they?
No, they're the original ones. Samyoung rated 105degreeC, they don't seem bulged.
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File Type: jpg IMG_20120731_231156.jpg (1.55 MB, 74 views)
File Type: jpg IMG_20120731_231225.jpg (1.39 MB, 91 views)

Last edited by shineangelic; 07-31-2012 at 03:31 PM..
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Old 07-31-2012, 03:31 PM   #28
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Default Re: Samsung 2233RZ "2s to blanck"

Ok firstly sorry - forget transistors for now - mixed up a reply on another post.
I was thinking transistors were overheating part of the board making it bronze but dont know why I mixed the two up.
Anyway do you just mean the small brown mark the white arrow points to (very convenient that being there)
I think it is just where the secondary wiring has burnt out and marked the board.

Dont really think there is much we can test until you get a new transformer, unless you have another monitor in which you can test the panel (CCfls)
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Old 07-31-2012, 03:47 PM   #29
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Default Re: Samsung 2233RZ "2s to blanck"

Quote:
Originally Posted by selldoor View Post
Anyway do you just mean the small brown mark the white arrow points to (very convenient that being there)
I think it is just where the secondary wiring has burnt out and marked the board.
No I made it, because I'm a moron, I read "SOLDER" and I tried de-soldering there on front of the board at first. Don't laught at me
My stupid action maybe burnt the secondary wiring, I agree on this.

Quote:
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Dont really think there is much we can test until you get a new transformer, unless you have another monitor in which you can test the panel (CCfls)
thank you. Hopefully it'll arrive in 15 days. I'll report back.
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Old 08-27-2012, 12:43 PM   #30
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Default Re: Samsung 2233RZ "2s to blanck"

The transformer arrived. I soldered it and...IT WORKS!!

I'm so happy I saved it

thank you for support
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Old 08-27-2012, 12:56 PM   #31
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Default Re: Samsung 2233RZ "2s to blanck"

Well done !- cant remember if you replaced any caps - if not you might consider replacing the medium sized ones with good low esr ones to give the monitor a bit longer life. If the caps are sam young or samwha they are not very good.
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Old 10-04-2012, 01:38 PM   #32
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Default Re: Samsung 2233RZ "2s to blanck"

Hi! same problem here waiting for transformer i havent even test it yet, but it seems like it is a common problem with those 2233rz. Selldoor how long did you wait for that transformer to arrive from HK ?
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Old 10-26-2012, 12:54 PM   #33
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Default Re: Samsung 2233RZ "2s to blanck"

I would like to thank you everyone! Easy fix and my monitor is alive again! I did it without checking anything , when ive seen that topic i just ordered one transformer... solder it and done! thanks guys
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Old 12-22-2012, 09:46 PM   #34
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Default Re: Samsung 2233RZ "2s to blanck"

Hello guys! Im so happy i found this thread and forum after hours of searching on google. I have this monitor and I starts the screen and it shows the background image for 1 second then the picture becomes black. Start it again and it does the same thing again. I have opened the screen but do not see any capacitors that are clearly broken. And if i use a flashlight i can se the picture on the screen so its the backlighting who i damage. I did not understand if you others guys did see the picture on the screen if you used a flashlight?
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Old 12-23-2012, 02:20 AM   #35
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Default Re: Samsung 2233RZ "2s to blanck"

The symptoms you are getting,is typical for this kind of fault IF it is the transformer that is faulty.You need to measure the secondary resistance on the Inverter transformer as shown in the Post, and that should confirm if the problem is the transformer.
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Old 12-23-2012, 07:53 AM   #36
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Default Re: Samsung 2233RZ "2s to blanck"

Thanks for you reply! I will try measure inverter now.

Edit: I try at 2000ohm and 20k and the instrument only showing 1.

Last edited by jays_swe; 12-23-2012 at 08:44 AM..
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Old 12-23-2012, 09:53 AM   #37
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Default Re: Samsung 2233RZ "2s to blanck"

Sound like an order for a new transformer will be made by yourself then.
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Old 12-24-2012, 10:51 AM   #38
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Default Re: Samsung 2233RZ "2s to blanck"

yes I have order one now hopes that solves the problem.
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Old 12-24-2012, 11:12 AM   #39
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Default Re: Samsung 2233RZ "2s to blanck"

Can you just confirm which pins you measured - can you post a pic of your transformer
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Old 12-24-2012, 01:23 PM   #40
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Default Re: Samsung 2233RZ "2s to blanck"



s1-s2
s3-s4
p1-p2
p3-p4
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