Could I use a non contact voltage detector to check for faulty components on a tv power board?
If so,which one would you guys recommend?
If so,which one would you guys recommend?
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Re: Using a non contact voltage detector
Highly unlikely! -
Re: Using a non contact voltage detector
A guy from shopjimmy told me this.
If you have a voltage detector you can try holding it near the high voltage lines that go from the power supply to the inverter and see if you get anything on them. Please don't try and use a meter to measure this as its high frequency and can damage your meter.
So I am a little confused.
Thanks for taking time to help me.Comment
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Re: Using a non contact voltage detector
It all depends on what you are trying to accomplish.
The non-contact voltage detector may tell you if you have high voltage present but it won't tell you what level of voltage is present. A power supply board will also have lower voltages which will not be detected by the non-contact voltage detector.
As far as damaging a meter, it depends on the capabilities of the meter and what you are trying to measure.
Checking for faulty components is best done by measuring resistance, capacitance, voltage, or current. These are all things that a non-contact voltage detector will not do.Comment
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Re: Using a non contact voltage detector
I understand.
I have another Samsung LN40A550P3FXZA that I am trying to sort out. The guy told me that the high voltage side is usually to blame for the problems that I am experiencing.
Just thought I would find a good way to check the board for proper power output.
I wish I could find a schematic to tell exactly what voltages I should be getting from each point.Comment
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Re: Using a non contact voltage detector
Some of the boards will have the voltages listed in the silkscreen. You can also get a general idea of what a voltage might be by the capacitor ratings. A capacitor rated at 450 volts will have less than 450 and probably in the range of 300-400 volts.
If you measure the voltage across the capacitors or after it has been rectified and filtered it will be DC and you meter will work fine as long as you have the voltage range set higher that what you are measuring.A guy from shopjimmy told me this.
If you have a voltage detector you can try holding it near the high voltage lines that go from the power supply to the inverter and see if you get anything on them. Please don't try and use a meter to measure this as its high frequency and can damage your meter.
For help on troubleshooting the Samsung TV you would probably be better off to start a new thread with the Title listing the TV make, model, and problem description. In the message include a more detailed description of the problem along with good clear pictures of the back inside of the set showing all of the boards and pictures of each individual board. There are a lot of very knowledgeable people on here that will probably be able to help you.Comment
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Hello friends,
Looking for some guidance here. The RAM voltage circuit on this motherboard keeps burning out PU301 which is a RT8231AGQW. Copy of the board with the burnt chip attached with some voltage measurements and copy of the schematics also included.
I think I've checked almost every component in the circuit, but when I change the RT8231, the laptop starts I have 1.2V on the inductor for about 10 seconds and then the RT8231 goes south and no more voltage on the inductor. All other voltages on the laptop are good, this is the only one conking out for a reason I... -
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Now... -
3+1 Voltage Regulator for IMVP-7/VR12 CPUs
Compliant with IMVP-7/VR12, the ISL95831 provides a complete solution for microprocessor and graphic processor
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serial control bus to communicate with the CPU and achieve lower cost and smaller board area compared with the two chip approach.
Based on Intersil's Robust Ripple Regulator...11-05-2024, 03:24 PM
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