Re: Samsung SyncMaster Model 731N Distorted Display
Okay now I understand. Some old sound cards might have fixed 1.8V regulators.
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I will look at our old sound cards. I think we may have a few of them yet.
I found one on an old sound blaster here at home.
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6206a is a voltage regulator from the datasheets that I have seen and 18 is denoting 1.8V DC so it should work.
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Re: Samsung SyncMaster Model 731N Distorted Display
well I think that chip would have worked if I would not of broken it. Oh well I guess I will just keep picking though the bone yard and maybe get lucky again.
Thanks for your reply I have looked at the data sheet and as far as I can tell it should work.
Thanks
Since you have access to the data sheet, you can test out the regulator by hooking up a 9V battery to the input and measuring the output with your meter. You should read 1.8V.
Re: Samsung SyncMaster Model 731N Distorted Display
Has anybody tried to figure out why this regulator fails? I have one of these monitors with no backlight (a completely unrelated problem), and I want to make sure I don't have any other problems once I fix the inverter. Is it just a cheap, low-quality part, or is there something else that will make even a name-brand part fail?
Is it just a cheap, low-quality part, or is there something else that will make even a name-brand part fail?
Vizio TVs seem to have a lot of problems with bad voltage regulators. While I'm no design pcb engineer, I suspect it is a combination of lowest possible cost parts and poor circuit design.
The regulators could be failing because they are designed without any "support" components or they are cheaper to use versus something more expensive.
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Vizio TVs seem to have a lot of problems with bad voltage regulators. While I'm no design pcb engineer, I suspect it is a combination of lowest possible cost parts and poor circuit design.
The regulators could be failing because they are designed without any "support" components or they are cheaper to use versus something more expensive.
The circuit design is really strange. I could see Samsung screwing up the circuit design that badly. For some reason, they put random diodes in parallel with components in the inverter where diodes are not needed.
The regulators on my board are out of the 1% tolerance (1.76V for the 1.8V regulator and 3.25V for the 3.3V regulator), but they are probably a cheaper version with wider tolerances. The board still works perfectly.
The regulators on my board are out of the 1% tolerance (1.76V for the 1.8V regulator and 3.25V for the 3.3V regulator), but they are probably a cheaper version with wider tolerances.
Some datasheets I have seen say 2% is still within specifications.
The tolerance also depends on how accurate your multimeter is. Today's cheapest multimeters have 0.5% DCV accuracy and most of them use the Intersil 7106 chip or some variation. How long the cheap ones stay within the 0.5% is the key question.
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