3.1 检查电源线 (Check Power Cables) 确保电源线插入插座和电源单元(PSU)时是牢固的。 3.2 检查主板连接 (Check Motherboard Connections) 检查主板上电源连接器是否牢固,尤其是24针主电源连接器和4/8针CPU电源连接器。 4. 使用万用表测试电源 (Testing the Power Supply with a Multimeter) 如果连接没有问题,...
Though mosfets usually require sophisticated equipment for checking their conditions, a simple way using a multimeter is also considered effective most of the time for checking them. We take the example of two types of N-channel mosfets, the K1058 and the IRFP240 and see how these mosfets can...
How to Check a Step-Down Transformer Testing Continuity The ignition coil consists of a single wire wound hundreds of times around a core, and any break that occurs in the wire renders the coil inoperable. It's impractical to uncover the coil and examine the wire; fortunately, there's an ...
How to check DC Voltage with a multimeter Connect the red Test Lead to “VOhmsmA Jack” and the black lead to DC Current Circuit Symbol “COM” jack. Set the “Range Switch” to desired DC V position. If the voltage to be measured is not known then set the Switch to th...
To measure current with a digital multimeter it is possible to follow a few simple steps:Turn the meter on Insert the probes into the correct connections - in many meters there are a number of different connections for the probes. Often one labelled common into which the black probe is ...
Multimeter (to test voltage and connections) Wiring the Meter: Step-by-Step Turn Off the Power Before starting, turn off the power to the service panel. Also, make sure power coming in from the utility is off. Double-check with a multimeter to ensure there’s no voltage. Check the Meter...
To anyone who has burned a finger, damaged a table or melted a carrying case with a traditional soldering iron, the Cold Heat tool can seem pretty amazing. It's lightweight and portable, and it can cut down on the amount of time it takes to make small electronics repairs. On top ...
If that is not the case, then is time to open the speaker. WARNING:Unplug the speaker from electricity, so you don't accidentally touch a live wire! First take a look at the speaker driver: take a multimeter, set it to measure resistance and check the driver’s terminals. If you get...
it's a good idea to test an old transformer to confirm it has failed before replacing it. This requires amultimeterand takes just a few seconds. In fact, the hardest part of replacing a transformer may be finding it, since they're often tucked away in attics, basements or crawlspaces....
A multimeter is a must-have tool for circuit board testing. I am always excited to test drive a new car. I start revving up the engine and accelerating quickly just to check out if it suits my taste. Obviously, the salesperson isn’t impressed and is more concerned with whether or not...