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Last edited by retiredcaps; 12-05-2010, 05:06 PM.--- begin sig file ---
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Re: Sony SMD-HS73
Don't forget
it is entirely possible to have more than one bad ccfl, to rule that out you could hook up all the ccfls from your good monitor, The ribbon cable does not need to be hooked up just make sure it's well insulated, A video source is required
Al.Whatever I do, I consider it a success, if in the end I am breathing, seeing, feeling and hearing!
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Re: Sony SMD-HS73
The points Retiredcaps circled. I realize they weren't exactly the same, but they were less than 30 ohms apart at about 1000 ohms.
Edit: I'm also currently letting it warm up to see if I can adjust the brightness control.. Currently it isn't staying on long enough to access the menu.Last edited by torin3; 12-05-2010, 04:54 PM.Comment
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Re: Sony SMD-HS73
Wel, with the 470uF cap back in, it is working the way it was before.
I'm going to try 2 lamps at a time from another monitor, but I don't think I can get all 4 to reach.
I'll be putting together an order for all the other caps that haven't been replaced and see if that helps.
Have a good evening.Comment
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Re: Sony SMD-HS73
Ok, I tried with 2 known good CCFL lamps at a time, and got the same behavior.
I can't try 4 at a time just yet because the only monitor I have available for this has all 4 plugs close together and this monitor has them on opposite sides of the inverter board.
I'll order the rest of the caps to make sure they are all replaced. Should get them in by Wednesday or Thursday.
I'll be happy to try any other tests.Comment
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Re: Sony SMD-HS73
Ok, I tried 4 known good CCFLs all at the same time.
Same flashing behavior.
Caps should arrive tomorrow.Comment
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Re: Sony SMD-HS73
Caps arrived today. Replaced all the cans, including the surface mounted electrolytics.
No change in behavior.Comment
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Re: Sony SMD-HS73
Can we get a clear focused close up photo (as close to 2000x2000 and without flash) of the area in red?
edit: What is the part number of that 20 pin IC in the red area?Attached Files--- begin sig file ---
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Re: Sony SMD-HS73
Sorry, had to use flash, as I don't have bright house lights.
I think I got a clear enough photo. If not, I can try again.Attached FilesComment
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Re: Sony SMD-HS73
Have you done any thing, as far as re soldering the inverter transformers?
Al.
Never mind missed it in an earlier postWhatever I do, I consider it a success, if in the end I am breathing, seeing, feeling and hearing!Comment
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Re: Sony SMD-HS73
Ok I have something for you to try.
Substitute one ccfl at a time again, but find a place on the back of the lcd where you can see the light of the ccfl.As you try the ccfl in each socket dose the brightness look the same on the test ccfl in each socket.
I am hoping this might find a area of the inverter to look at closer.
Al.Whatever I do, I consider it a success, if in the end I am breathing, seeing, feeling and hearing!Comment
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Re: Sony SMD-HS73
Can you give us the part numbers for U1, U2 and U3?Comment
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Re: Sony SMD-HS73
hi to all ze members.im new here at badcaps.umm we usually encounter that kind of problem.same brand,same model.very hard to find ze culprit. what we do is we replace the inverter with a home made one..it works..but maybe a ten percent degradation in contrast..iComment
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Re: Sony SMD-HS73
When I had all 4 known good CCFLs plugged in, they were all 'bare' and I didn't see any obvious light difference. I will try again.
/ = new line
U1 = 0Z960S / 0326B1 / V31228.2
U2 = 4542 / (logo)AD(Delta smbol) / W37A
U3 = same as U2Comment
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Re: Sony SMD-HS73
This is a low probability, but just for my own curiousity, can you carefully measure the voltage across the main filter capacitor (the big one) and see if you get steady DC voltage?
You are looking for a steady voltage while the screen is flickering. You can use the original ccfls for this test.
For this test, I like to use aligator clips with my multimeter so I can do this measurement without using my hands. It is high voltage that you will be measuring (about 165V DC).--- begin sig file ---
If you are new to this forum, we can help a lot more if you please post clear focused pictures (max resolution 2000x2000 and 2MB) of your boards using the manage attachments button so they are hosted here. Information and picture clarity compositions should look like this post.
We respectfully ask that you make some time and effort to read some of the guides available for basic troubleshooting. After you have read through them, then ask clarification questions or report your findings.
Please do not post inline and offsite as they slow down the loading of pages.
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Re: Sony SMD-HS73
Did you ever verify that you can see an image if you shine a flashlight on the screen? The logic board is getting 5V and the voltage regs are working, therefore, you should at least get an image.Comment
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