Solved: Power Supply Question
The output voltage is supposed to be 15 volts DC: The technician begins making voltage measurements between some of the test points (TP) on the circuit board. Some of the more expensive models do not come with a power supply, which give you the opportunity to choose your own. Now that is more than enough for your run-of-the-mill system consisting of a hard drive, an optical drive and a fair-to-middling graphics card. The Delta-Sigma ADC belongs to the... http://www.tomshardware.com/answers/id-3106448/power-supply-question.html
solved What UPS (Uninterrupted power supply) do I need for this PC? Another reliability factor most students won’t recognize in this circuit is the "inrush” current experienced by the diode every time the circuit is powered up and the capacitor recharges. Part of the problem was the output voltage of the battery charger, but a large part of the problem was the fact that the charger’s output was unfiltered as well.
That's the question our fearless editors seek to answer. When students are first learning about semiconductor devices, and are most likely to damage them by making improper connections in their circuits, I recommend they experiment with large, high-wattage components (1N4001 What alternative do we have to “DC coupling” on an oscilloscope? Carefully measure all voltages and currents, to verify the accuracy of your analysis.
Each power supply has its own power cord, which provide protection against losing the power from a single cord or breaker. This also changes the input current waveform significantly, making it non-sinusoidal. solved PRS vs PRV UPS "uninterrupted power supply" solved If i have a 1500 watts power supply on my computer what UPS (Uninterrupted Power Supply) should i choose?? Trace the shape of the input current waveform, given the output voltage waveform and magnetizing current waveform (dotted line) shown here: The non-filtered DC output waveform is still shown as a
Reply 0 0 Kalt Regents Professor Posts: 4,224 Member Since: 11-19-2008 Message 3 of 6 (330 Views) Report Inappropriate Content Re: power supply question Options Mark as New Bookmark Subscribe Subscribe It could be that your 12V is out of spec. Go to Solution. 0 Kudos Reply All Forum Topics Previous Topic Next Topic 2 REPLIES Tim Cochrane_1 Occasional Advisor Options Mark as New Bookmark Subscribe Subscribe to RSS Feed Highlight Print If the current drawn from an output falls below the minimum, the power supply could be damaged or automatically shut down.
Reveal answer Hide answer There is an "open” fault between TP4 and TP6. https://forums.lenovo.com/t5/Lenovo-P-Y-and-Z-series/Power-supply-question/td-p/3419706 Question 8 Observe the following two waveforms, as represented on an oscilloscope display measuring output voltage of a filtered power supply: If both of these waveforms were measured on the same Show Ignored Content As Seen On Welcome to Tech Support Guy! More importantly, discuss with your students why the ripple is more severe under conditions of heavy loading.
It does, however, help prevent the power supply circuitry from interfering with other equipment energized by the same AC line power, by filtering out unwanted high-frequency noise generated within the power this contact form For you PC builders, be aware that some of the inexpensive cases often come with cut-rate power supplies that may not be up to the task of powering a high-end PC. Learning to mathematically analyze circuits requires much study and practice. I recommend resistors between 1 kΩ and 100 kΩ.
I would get it tested, or test it myself with a volt meter or power supply tester. http://h10025.www1.hp.com/ewfrf/wc/genericDocument?lc=en&cc=us&docname=c00038821 What would be a good power supply to upgrade to it only has 250 watts i would like atleast 350 .So i can get a better video card and not Yes, my password is: Forgot your password? have a peek here The purpose of this question is to get students to face this paradox if they have not recognized and resolved it already.
The server runs just fine with P0 plugged in. Needless to say Lenovo does not sell these power supplies and the liteon and delta recommended supistutes are not sold either... supply more energy to start a computer, but then return to steady state.Max Configurable Power is the maximum amount of power the unit can supply for a short period of time,
The output voltage is supposed to be 15 volts DC, but instead it is actually outputting nothing at all (zero volts): The technician measures 120 volts AC between test points TP1
JohnWill, Aug 11, 2006 #9 Sponsor This thread has been Locked and is not open to further replies. Are they strictly memorizing filter configurations, or do they have a technique for determining what type of filter circuit it is based on basic electrical principles (reactance of components to different This is a very time-intensive and inefficient method of troubleshooting. Check This Out Notes: The purpose of this question is to get students to look up the formula for calculating voltage regulation percentage.
Reveal answer Hide answer Transformers provide voltage/current ratio transformation, and also electrical isolation between the AC line circuit and the DC circuit. As usual, avoid very high and very low resistor values, to avoid measurement errors caused by meter “loading” (on the high end) and to avoid transistor burnout (on the low end). When you have multiple LEDs with a common anode or common cathode, can you use just one current-limiting resistor? Also, critique this technician’s troubleshooting technique and make your own suggestions for a more efficient pattern of steps.
two things that you know must be functioning properly, no matter what else may be faulted). eric2768Mar 25, 2016, 5:29 AM bigpinkdragon286 said: Since your CPU requires 12V to work, if your computer is running at all, your PSU is supplying 12V. It's good for the community and I might not be able to get back quickly. - Thank you. You may be able to get a reading of your +12V with software such as HWMonitor, but voltage readouts through software should usually be taken with a grain of salt and
I’ll let you do the research here and present your answer(s) during class discussion! If students are not understanding why there is a frequency difference, you might want to help them out by asking two students to come up to the front of the class Notice how I did not simply ask them to regurgitate a formula; rather, I presented a realistic figure for them to interpret. Certainly, the diode was not properly rated for the reverse voltage it was being subjected to, but this might not be the only form of abuse!
She taught electronics and computer science as a guest lecturer at the Government Girls' Polytechnic, Gorakhpur. Stay logged in Sign up now! if you are looking to play any newish games you don't want that PC. Follow-up question: predict the frequency of the ripple voltage in this power supply circuit.
JohnWill, Aug 11, 2006 #7 brian8474 Thread Starter Joined: May 8, 2006 Messages: 198 I didnt do that.. Notes: Many years ago, when I was first learning about power supplies, I tried to power an automotive radio with voltage from a battery charger. Reveal answer Hide answer Shorted capacitor, open transformer winding (as a result of overloading), shorted diode(s) resulting in blown fuse. solved RS232 or USB connection is better for Uninterruptible Power Supply (UPS) More resources Tom's Hardware Around the World Tom's Hardware Around the World Denmark Norway Finland Russia France Turkey Germany
View Solution. Reveal answer Hide answer Let the electrons themselves give you the answers to your own “practice problems”! This way, you won’t have to measure any component’s value more than once.