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Power Off To Drain Capacitors?


This is due to a property called dielectric absorption, in which energy stored in the dielectric during use is released gradually over time. microwaves have some awesome parts in them which can be very useful) To short it out I recommend just using a plastic handled screwdriver and touching the contacts together. WarDad we just passed 300V. When you press the power button, all that happens is a signal is sent to this microcontroller, with the usual interpretation of "hey, wake up" (if the computer is off). have a peek here

Only touch the case, and use insulated tools, not a problem. _________________Z ________ Top orionlion82 Post subject: Posted: Sat Nov 01, 2003 4:38 pm Joined: Sat Nov 01, permalinkembedsavegive gold[–]LordGarak 0 points1 point2 points 8 years ago(0 children)I don't think this has anything todo with the motherboard. I was always afraid of ever opening up a power supply to clean it out. Good stuff to know if you are planning on playing around inside your amp.I'm completely new to cracking open amps to muck about, so I'm wondering if there are things you http://electronics.stackexchange.com/questions/12686/how-to-discharge-smoothing-capacitors

How To Discharge A Capacitor Safely

Rules No content behind paywalls. Personally, it causes me no discomfort to touch 40VDC, at this point I can handle the PSU, your milage may vary. Before working on an appliance or electronic device, you must first discharge its capacitor; here are instructions to discharge a capacitor safely. The larger the capacitor, the more charge it can store per unit voltage, even after the appliance is turned off.

  • Quote Postby Stites » Mon Mar 17, 2014 10:40 am Ya know?
  • I am curious as to what might have happened.
  • Check the power supplies.
  • The CV2/2 energy stored at the nominal 150V operating voltage is 1502×4400 µF/2, or approximately 50J.
  • CRT monitors.

Heh. permalinkembedsaveparentgive gold[–]xzxzzx 1 point2 points3 points 8 years ago(0 children) My best guess is that it's a power source protection mechanism, which if encounters power surges it'll shutdown the power for a while actually it is very crap that the americans are stuck with 110V (as crap as their inches and pounds) why: to get the same power out of a device they need How To Discharge A Large Capacitor Until you understand how your amp acts, I won;t tell you to trust a technique.

then you need to be careful. How To Discharge A Capacitor With A Multimeter Please use the "suggest title" button for link submissions, or copy the title of the original link. CONNECT WITH EDN ON TWITTER ON FACEBOOK ON LINKEDIN EDN VAULT Latest Collections Issue Archives Loading... https://peavey.com/forum/viewtopic.php?t=35065 Pull the transistor's base to ground if the circuit is switched on.

Sure takin' a while... Discharging Ac Capacitor Take note of how long the PSU takes to reach this safe voltage so you get a good idea of when you can begin to handle it. Don't let your unprotected hands near anything involved. 2 Disconnect the device with the capacitor from electric current. Quote Postby KTB » Mon Mar 17, 2014 6:06 am Sparkopath wrote:Great topic!

How To Discharge A Capacitor With A Multimeter

There will be no damage(electrical) to the surrounding components. http://forums.silentpcreview.com/viewtopic.php?t=6123 View: New Articles|All Articles Home|Reviews|Forums|Articles|My Profile About Overclock.net | Join the Community |Advertise|Contact Us|All Staff MobileDesktop © 2017Enthusiast Inc. How To Discharge A Capacitor Safely The value of the resistor is chosen to be low enough that the charge on the capacitor bleeds off quickly, but high enough that the resistor will not consume too much Discharging Capacitors In A Tube Amp Text is available under the Creative Commons Attribution-ShareAlike License; additional terms may apply.

It is a function. navigate here If so then there would still be approx 1/10th of the original stored charge - still a significant amount of charge. To get to the leads you'd have to either stick a conductive object like a paperclip underneath the capacitor, or else remove the entire PSU circuit board from its enclosure and I was concerned that horrible rectifier and transformer side will cause problems to the regulator, so I added some extra capacitors. –AndrejaKo Apr 7 '11 at 12:31 add a comment| Your How To Discharge A High Voltage Capacitor

Is it cheating to drop the outliers based on the boxplot of Mean Absolute Error to improve a regression model How can I stop my colleagues excluding me from socialising after HAHAHAHA Knocked me back about three feet against the fridge! permalinkembedsavegive gold[–]Pappenheimer 0 points1 point2 points 8 years ago*(4 children)Holding down the power button for some seconds will reset the BIOS, same as removing the buffer battery or shorting the appropriate jumper. Check This Out Already have an account?

Search Sign In | Sign Up Edit Profile | Sign Out Login Sign In With {* loginWidget *} {* #signInForm *} {* signInEmailAddress *} {* currentPassword *} Forgot your password? How To Discharge A Capacitor With A Light Bulb Magento2: run cron job every minute Has copy protection ever been used in physical books? The energy is transferred back and forth between the capacitor and the inductor.

Using the meter.

While capacitor safety is very important, when it comes to consumer power supplies life is a lot simpler than what this myth would lead you to believe. permalinkembedsaveparentgive gold[–][deleted] 0 points1 point2 points 8 years ago(0 children)I knew I'd get a response like that. XThread Tools Show Printable Version Email this Page Search this Thread Advanced Search Bleeder resistor From Wikipedia, the free encyclopedia Jump to: navigation, search This article does not cite any sources. How To Discharge A Capacitor With A Screwdriver If it is removable, it is probably very large and potentially very dangerous. 5 Touch a device to the capacitor leads for several seconds.

Create my account Slide to join now Processing… Similar Threads Thread Thread Starter / Forum Replies Which Capacitor? It can be a potentially lethal shock hazard for the user or maintenance and servicing personnel, who may believe that because the device is turned off or unplugged it is safe. But why you'd want that, I don'T really know. http://stricklandresearch.net/how-to/power-point-handouts.html it can be done perfectally safely, but you dont really want to screw it up.

Enter your email below, and we'll send you another email. {* #resetPasswordForm *} {* signInEmailAddress *} {* /resetPasswordForm *} Create New Password We've sent you an email with instructions to create A valid concern. Usually, all you ever really want to do is yank at a thermistor or swap the fan... Top Pjotor Post subject: Posted: Thu Sep 30, 2004 11:42 pm *Lifetime Patron* Joined: Mon Jun 30, 2003 9:06 pmPosts: 485Location: Uppsala, Sweden Tuberocity, welcome to the forums!

Consider a moment, The primary capacitors of even the most powerful ATX power supply, 1200W and up, would drain to safe levels (voltage too low to overcome your body's natural resistance) Is the rule something like, if dropping the chassis out, then discharge the amp?Thanks,Sparky Top KTB Member Posts: 2102 Joined: Mon Oct 06, 2008 7:53 pm Re: Discharging amp capacitors - Inadvertently touching a charged-up filter capacitor can kill, so it's essential that you check for these stored charges before you work on any amplifier. But, sometimes I'd assist another guy (who was more RF-oriented than I was) at the transmitter site.

They does not cost much. –BarsMonster Apr 7 '11 at 12:27 That's my plan. Wikipedia® is a registered trademark of the Wikimedia Foundation, Inc., a non-profit organization. NO!, I didn't pick it up from the outside, and YES!, It was plugged in! Already have an account?

good question. oh!