Circuit problem

Similar Questions

• Pavilion G6 2005ax: laptop computer charger circuit problem

  My laptop HP G6 will not charge the battery and is not able to run with only one adapter. The charge LED lights up not at all. The laptop requires the battery to start but once it starts, the laptop is able to operate using the power of the AC adapter. I took it to a local service center, and the guy said that the motherboard has a short circuit and needs to be replaced.

  I decided to try to fix it myself. I used a multimeter and found that the power adapter and plug DC work correctly and give output 19.5V. However, when I tested the pins of the battery meter showed a power of only 2, 6V. I'm guessing that there is a problem in the load circuit. Can someone help me?

  Thank you.

  Hello @Prad3791,

  I understand that your laptop encounters a problem with the circuits on your computer to charge, and I'd be happy to help you in this case!

  Given that your motherboard has been identified to have a short circuit, please contact our technical support at the 800-474-6836. If you do not live in the United States / Canada region, please click the link below to get help from your region number.
  
  http://WWW8.HP.com/us/en/contact-HP/WW-phone-assist.html
  
  I hope this helps!
  
  Concerning

• design of circuit problem

  Hello

  I created a R - 2R ladder network (joint it photo below) to convert digital-to-analog and I used an op amp to amplify the output of the R - 2R ladder somelevel network. The problem here is that I'm not able to generate ouput when I connect the same versatile Board circuit and it gives precise ouput in multisim someone pls help me what could be the problem.

  The common 741 op amp input mode range is specified as +/-12 V with a power supply +/-15V. Due to the input of this beach circuit design won't change much with the supply voltage. The tension on the no reverse entry in your circuit is ~0.6 V which is well outside the common-mode input range.

  If you need to use a single power supply, then look for an amplifier with negative power included in the common-mode input range.

  Also consider the range of output voltage. For the 741, the output range is of +/-12 V minimum and +/-14 V typical, which means that your circuit cannot guarantee a lower than 3 V output voltage regardless of the digital input.

  Polarization R11 R12 circuit does not a lot because the R - 2R network has a much lower impedance. R11 is in parallel with the impedance of the network (R) output.  The contribution of the 12 V bias is about 70 mV.  Input bias current must flow in input of OPAMP becaues they are the bases of the NPN transistors. If the output of the R - 2R network is located at the entrance common mode range enough current polarization runs through the network (error 80 typical uV).  If the output is not in the circuit's common-mode input range will not work if the impedance will not matter.

  Lynn

• 4620 everything into a paper circuit problem

  I get a message that says out of paper when I loaded paper. It seems to me that the printer is not picking up the paper. Any ideas on how to solve this problem? I have unplugged and turned back. I attempt to clean (w/water only) rolls. I'm puzzled!

  Thank you!! I found the soln and tried. It did not work. Finish the NAP with the media who said it was a mechanical problem. At get a replacement. It arrived yesterday. I implemented the work today and it's

• How can I activate my digital Circuit VI

  I'm sorry for my ignorance. I would say I have beginner to intermediate skills with LabView. However, I want to enjoy my VI of the virtual world and on a working circuit. I'm lost as to how to do it. I don't do anything complicated. It comes to my stream of VI.

  Analog signal in > Amplify > fill > abnormal signal detect (a moving window of about 15 seconds) > alarm when an anomalous signal detected.

  In LabView, it works very well, and now I want to do the hardware prototype.  Any suggestion would be appreciated.

  Nate

  Hey Nate,

  I suggest that you break down your circuit problem in sections, in the same way you did with your LabVIEW program.

  First thing you need is an amplifier.   Your local library should have tons of things.  But Google is your friend.  An example. http://www.hobbyprojects.com/A/audio.html

  So, you want a filter.    And a detector.   Finally, an alarm.

  You might want to try Multisim for your circuit design.

  Good luck with your project!

• Satellite R830 not working - flashing power light

  Hello

  My Satallite R830 lights.

  The power symbol flashes orange 8 times then pauses and restarts. There are 6 quick flashes followed by a longer 7 flash then another quick. The symbol wireless is lit (orange) all the time.

  If I unplug the laptop and remove the battery and hold the restart button for 30 seconds then without taking the battery in the charger stops flashing and the symbol of the power goes to green, until I try to turn it on, it has a fraction of a second where it looks like it is starting then stops and flashing orange again.

  Same thing if I unplug the AC adapter and the battery and then tried the above, but with battery or ac charger.

  I tried with another adapter (same output amp and volt).

  Can anyone help?

  Thank you very much

  Post edited by: sivyer2081

  > 6 quick flashes followed a longer flash 7 and then another a quick

  If the power supply microcontroller has detected an error lamp DC IN sends a blink code.
  The short means 0 and a long time means 1.
  I have your case, that means: 0000 0010

  Because the error code starts with LSB (least significant bit) to read it from behind
  -> 0100 0000 0000 0010-> 40 H (hex)
  Now, you will need to know what means 40 H

  After a few details that I found on the internet, the 40 H could be the fault of S3V output. (S3V voltage is more 3.47V)

  However, such errors are mainly related to the problem of the motherboard (internal circuit problem) and from my point of view of the party only a few replacement may fix this error.

• Satellite L10-333 without BACKLIGHT on screen

  My Toshiba L10-333 when turned on lights and display also, only that there is no lighting, so I don't see anything on the screen without the help of an outside light.

  If there is someone who can help with this problem please please help. I think that it has to do with, the power of the LCD. If the main power circuit problem, can it be bypassed? Even if it means losing control over the brightness of the screen?

  Any ideas would be welcome. Also, if anyone has the circuit of Satellite L10-333, please report it. Thank you.

  In such a case, you should send your machine to an authorized repair partner since it clearly sounds like a hardware failure. If I were you I would not try to repair it by oenophile because when not with something you might destroy your whole machine.

  If you need assistance to find an ASP simply go to the Toshiba Mainpage (http://eu.computers.toshiba-europe.com/) go to Support downloads & -> support homepage-> find an authorized Service partner

  Welcome them

• Acer Switch 10 i. put powered w / power cord, power button + volume Up/Down ii. No LED light

  Problem:

  Power does not illuminate. 75% battery charge. A tried
  a. power switch button
  b. power button + volume Up/Down button for 60 seconds (technique of being able to be in hibernation mode)
  c. a/c power cord... light to show load or power not turn on AND the Tablet does not become hot... in other words, Tablet accepts no power coming from being plugged into an electric outlet

  Solutions to be able to put it back on

  1. perhaps central card mother battery died... Well, in the past my LAPTOP would work with single power supply and no battery... but... it is a tablet that works maybe like a mobile phone because if the battery is dead, then unit does not work until the Central battery has sufficient charge

  2. maybe an electrical circuit problem?

  3. may reset a deep sleep mode?   ... but already there is a technique of this situation and I tried it.

  4 perhaps, software power settings but if are unable to start. can't get to the BIOS.

  Thanks much for any help.

  Solution... it was an electrical problem, capacitor w / low-Volt charge had gone below this threshold to function, voltage decay over time.  Replaced.  Laptop as it has done before does not.

• CQ62-209wm: CQ62-209wm turns on but does not rest on the black screen

  This same question was asked in 2013 but was never answered. The proposed answer was to run diagnostics on the hard drive and memory. My laptop has exactly the same problem and I have the tests. Everything going smoothly. I finally decided that the video was out so I had a bad mother. Well, I ordered a new card mother and new battery new memory. I pulled the heat sinks cleaned the CPU, cleaned the fan and cooling fins, and then replace all. Guess what people, it is still the same as before with these new rooms. No beep codes are generated, without sounds, etc. What happens is the caps lock light flashes approximately every 3 seconds and the WiFi symbol stays orange. He never blinks. I found the light accidentally code page, but there is no reason to corosponding between codes of light and the flashing cap lock key. It will just sit there and blink as long as you leave it or until the battery going dead comes first. This same problem has been around since I found a multitude of messages about this and this is not only a model. Forums in the world have this posted on them.

  So how about it HP engineers. Is there anyone of you ready to take on this problem and tell us how to solve this problem once and for all? I'm tired of having a computer that works only when it wants too. I want both of my laptops CQ62-209wm to work. I am able to get laptops to start completely about 35% of the time. In order to make their work I remove the battery, plug in the power supply, replace the battery and then try to start it. Sometimes it works most of the time, this isn't. I'm starting to suspect a possible in the power circuit problem, because it is the first laptop I've ever used or owned not illuminate if there is no battery installed.

  I brought your question to the attention of a team within HP. They are likely to ask for information from you to get your information or product serial number. Please search for a private message from a contact HP identified. Also, remember not to publicly post information and series numbers.

  If you are unfamiliar with the operation of the function of private messages of the Forum, this post has instructions.

• TV does not turn on

  I just look something up in sitting position with the tv on, the Xbox game, then cut the video and audio. The red light indicating the power was still on. Now it just blinks 4 times on and on. I looked at this top and I saw it was a circuit problem and might cost $ 100-280 to fix. I also found something I've rarely heard works called a hard reset, where you unplug the TV for at least 4 hours. I was told that even if it works, its only temporary. Is there something I can do? I just don't want my grandfather think that I broke his TV. He had less than a month.

  If the TV is connected to a power strip or surge protector, remove the power strip or surge protector and plug it directly into the wall outlet. If the problem is resolved, the problem is with the power strip or surge protector and not the TV.

  In addition, ensure that the rear of the TV is well ventilated that TV may be overheating.

  If the problem persists, the TV will require repairs. You can locate the centers of the closest authorized repair the link below.

  https://eService.Sony.com

  If my post answered your question, please mark it as an "accepted Solution".

• where is the on button protector / DAV-HDX265

  DAV-HDX265 push power flashing protector button

  Messages PROTECT and PUSH POWER blinks when the amplifier protection device has been activated because a strong signal has been entered, or if there is a short circuit detected.

  To resolve this problem, turn on the amplifier turned off and wait at least 30 minutes. Click here for more troubleshooting. If the problem persists after that the unit turns back on, check the speaker cables to eliminate the short circuit problem.

  If the issue is still not resolved, service may be required.

  If my post answered your question, please mark it as "accept as a Solution.

• Problem of Convergence HB in co-simulation EM-circuit

  Hello

  It would be really helpful if someone could take a look at the problem of simulation in the attached draft. I get errors from simulation - "step for source stepping size has declined under a permissible minimum value."and"poor convergence in the analysis of AC/DC (rel/abs err = 2,000 / 0.000) the biggest change (41) node in the node (46) maximum voltage = 53.076 minimum voltage in the node (MET_BASE!" _S12_LD1. R1.et) =-4.337 the biggest change in the branch (_S12_S1. I16) Maximum current in the industry (_S12_S1. I17) = 951,567 m current Minimum in the branch (MET_BASE! _S12_LD1.) R1. Bessel_L1. "(I) =-1735"

  Despite trying most of the suggested solutions enumerated using the particular error message, the problem persists. What I do wrong here in the configuration of the simulation?

  Thank you much in advance.

  You check the use frequency of the project on block of EXTRACT properties > frequencies tab.  So the structure of the MA is only simulated at frequencies of input: DC and not harmonics 5 simulation HB is taken into account.  So microwave Office must extrapolate at these frequencies. Your block EXTRACT frequencies should be defined to include 0, 1, 2, 3, 4 and 5 times each frequency simulation... .to you chanage the number of harmonics in the harmonic balance options.  You can also simply define the block EXTRACT sweep from 0 to 10 GHz.  Whatever it is, the simulation of EM will take more time, of course.  If AXIEM does not converge on a response, change the properties of block of EXTRACT > AXIEM tab, click the secondary Show button and under Advanced frequency sweeping (AFS), increase Max # sim points.

  For circuits that include models not linear, you must include the frequency = 0 even for linear measurements, for the accurate calculation of the DC polarization.

• Problem in any AC circuit with inductance and ammeter

  In any circuit AC I have connected three virtual components: power source of AC voltage (100Vrms, Freq. 50 Hz, phase 0), inductance (0,31831 H) and ammeter in AC mode. After that I turned on the circuit ammeter display '1a '. If I change phase in power at 120 degrees cables, ammeter displays '0A '. This problem exists in multisim 11.0 and 10.x.

  Hello. I got it to work when I put 'Initial Conditions' to 'value zero '.

  Menu: Simulate / Interactive simulation settings/default settings to analysis transient instruments/initial conditions.

  W.k.r.

• Questions about circuit RC phase difference (possible timing problem)

  Hello

  Here is the program that I use to measure the phase difference in an RC circuit. Simply generate a sine wave of 2 kHz in LabView and send it to the circuit using an analog output. Then I measure the exit sinusoid using an analog output. I also measure using n oscilliscope. I can clearly measure the difference in phase with the oscilliscope and know that it is about 1.4 radians.

  Problems with the program:
  Phase difference different measured each time the program is run for the circuit. It is never as good.

  Possible causes:

  You will notice by looking at the vi that I measure the phase from the signal generator. Can I use a second analog input to measure the sine wave, as it came out at the beginning of the circuit?

  I think it's a timing issue. While the phase difference is constant each time the program varies each track. So the time that each measurement of tone starts its first measure seems to be different every time and causes this reading of different phase.

  The card that I use is a PCI-6221, is there a timing problem associated with switch for input and output audio acquistion or are they separated.

  Is anyway to ensure that two key measures measure phase at the same point in the (real) time?

  I would really advice or changes to the program - could someone offer me (I am a student and LabVIEW is not on our program so I have no support, but I use it for my project (OH!))

  I would certainly acquire two signals.  Food for the analog output right back into an analog input, then your signals filtered in another.

  Initially, I would feed the two analog inputs of the analog output and measure the delay in phase due to the multiplexed A/D on map.  Once you have this measure, you can feed in the filtered signal and then measure the difference of phase of this signal.

• Problem of Earth / Circuit Design

  Dear community,

  in advance, I thank you, I hope this is the right place to ask this kind of question.

  I would like to design a very small preamplifier pre - one preamplifier because it is mounted on the head of the insect to behave and a later analog frontend for the conditioning of signals and an additional gain. Unfortunately, I have major problems with respect to the ground.

  Please see the attached PDF file:

  (1) the preamplifier must be supplied with a supply separate power source such as a battery. as I need a dual power supply, I would use just two batteries connect them in series and take right in the middle like that is usually connected to the GND pin 0V? so in this case I would connect the preamplifier power supply 0V to the same connection as REF?

  (2) the shield of the cable from the head to the preamplifier should be connected for the Earth also the chassis of the preamplifier. In this case, I would like to use the net power to which I have access to the preamp power which is made with normal voltage rectifier/regulators (I know that there are missing parts )

  the 0V of the preamp power supply should be linked to the mass of the filter etc. steps that finally end in the GND to my A/D card of NEITHER? right?

  (3) now, I have to admitt that I did not the differential amplifier in scene myself and it actually makes me a problem because here's an op amp used to excite the input of the differential amplifier and this op amp is that related to these TWO grounds: the virtual mass to the head and the GND AI through the op amp. I unfortunately have no idea what this op amp is doing?

  So, it would be great if someone could tell me if my grounding considerations are right especially with (AI GND) and what does the op amp out and if I should use referenced asymmetrical pattern of NRSE.

  ManyManyMany thanks to you all,.

  Yours,

  Prefrontal

  Thank you!

  Kind regards

  Prefrontal