- Pioneer Plasma Receiver PDP-R05G trap switch - 3 Updates
- Power Supply For HP dv1040us Laptop - 7 Updates
- Charging gel cells in series - 11 Updates
| sherazbaig_87@yahoo.com: Jun 27 01:20AM -0700 Plz can you help me for this issue i also facing this problem in my product (PDP-R05G) PIONEER MEDIA RECEIVER . THANKS FOR YOUR TIME PLZ . |
| sherazbaig_87@yahoo.com: Jun 27 01:20AM -0700 Plz can you help me for this issue i also facing this problem in my product (PDP-R05G) PIONEER MEDIA RECEIVER . THANKS FOR YOUR TIME PLZ . |
| John-Del <ohger1s@aol.com>: Jun 27 09:12AM -0700 > Plz can you help me for this issue i also facing this problem in my product (PDP-R05G) PIONEER MEDIA RECEIVER . THANKS FOR YOUR TIME PLZ . There's a youtube video that supposedly explains the procedure, although I don't plan to watch it so I can't say for sure if the procedure works. Of course, none of this will repair the problem that caused you to open it.... |
| "tb" <nospam@example.invalid>: Jun 27 12:48PM Does anyone know if a novice armed with just a few Phillips screwdrivers can easily replace the power supply of an HP dv1040us laptop? Where would I purchase such power supply? Apparently mine has died and the laptop does not boot up. I cannot hear the inside fans turning nor the hard drive spinning. -- tb |
| "Rheilly Phoull" <rheilly@bigslong.com>: Jun 27 10:12PM +0800 "tb" wrote in message news:xn0jnrjfw171r5001@news.eternal-september.org... Does anyone know if a novice armed with just a few Phillips screwdrivers can easily replace the power supply of an HP dv1040us laptop? Where would I purchase such power supply? Apparently mine has died and the laptop does not boot up. I cannot hear the inside fans turning nor the hard drive spinning. -- tb Ebay would be a good start. Just buy one and plug it in. |
| Matthew Fries <nobody@home.com>: Jun 27 09:41AM -0500 On Sat, 27 Jun 2015 12:48:09 +0000 (UTC), "tb" >Where would I purchase such power supply? >Apparently mine has died and the laptop does not boot up. I cannot >hear the inside fans turning nor the hard drive spinning. I just purchased a new power supply for my Toshiba Satellite laptop from Amazon. Just do a search for power supply and your laptop model number, and I'm sure you will get a bunch of hits. The price was very low... $8. I have been using it for about a week now, and it seems OK. |
| Pat <pat@nospam.us>: Jun 27 11:15AM -0400 On Sat, 27 Jun 2015 09:41:51 -0500, Matthew Fries <nobody@home.com> wrote: >from Amazon. Just do a search for power supply and your laptop model >number, and I'm sure you will get a bunch of hits. The price was very >low... $8. I have been using it for about a week now, and it seems OK. To the OP: Your question is worded in such a way that it appears you think the power supply is inside the laptop. It isn't. It is that black rectangular thing half way along the power cord. The supplies themselves don't fail that often, but the connectors that plug into the computer do. See if you can borrow a friend's power supply to test your theory. If the supply or its connector is bad, you can easily find replacements online or at stores. Googling your model number resulted in many ads for replacement power supplies. If, however, the connector in the computer is bad, you will have to have it repaired by someone with more tools than a few Phillips screwdrivers. Good luck. |
| Jeff Liebermann <jeffl@cruzio.com>: Jun 27 08:16AM -0700 On Sat, 27 Jun 2015 12:48:09 +0000 (UTC), "tb" >Does anyone know if a novice armed with just a few Phillips >screwdrivers can easily replace the power supply of an HP dv1040us >laptop? Beware of novices bearing screwdrivers. >Where would I purchase such power supply? eBay: <http://www.ebay.com/sch/i.html?_nkw=HP+dv1040us+power+supply> >Apparently mine has died and the laptop does not boot up. I cannot >hear the inside fans turning nor the hard drive spinning. Power supplies will die, but I've seen more HP laptops with broken power connectors and power supplies with broken power plugs. That style of plug has a very fine wire in the center of the cable. If you bend the cable 90 degrees where it enters the plug, it will eventually break. If that happens, you can still run the laptop with the power supply plugged in, but it will not charge the battery. You might want to take a VOM (volt-ohms-guesser) and measure the voltage coming out of the power supply (without the laptop). It should be about 18.5 VDC. If that's what you're seeing, then look for a problem elsewhere. Good luck. -- Jeff Liebermann jeffl@cruzio.com 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558 |
| Jeff Liebermann <jeffl@cruzio.com>: Jun 27 08:22AM -0700 On Sat, 27 Jun 2015 08:16:21 -0700, Jeff Liebermann <jeffl@cruzio.com> wrote: >bend the cable 90 degrees where it enters the plug, it will eventually >break. If that happens, you can still run the laptop with the power >supply plugged in, but it will not charge the battery. Oops. That's wrong. The proper charger connector does NOT have the broken center wire problem. <http://i01.i.aliimg.com/wsphoto/v0/1623427915_1/18-5-V-3-5A-65W-Laptop-Adapter-AC-Power-Charger-For-HP-Compaq-Presario-V3000.jpg> I was thinking of this connector: <http://site.bixnet.com/images/products/CNT-C21C24.jpg> which is for a different model. -- Jeff Liebermann jeffl@cruzio.com 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558 |
| "tb" <nospam@example.invalid>: Jun 27 03:51PM On 6/27/2015 at 10:15:11 AM Pat wrote: > however, the connector in the computer is bad, you will have to have > it repaired by someone with more tools than a few Phillips > screwdrivers. Good luck. I see... I always thought that the black rectangular thing was called an AC/DC converter. I also thought that inside the laptop there would be some sort of power supply with power cables that would go to the fans, the hard drive, the graphics card,etc.; just like in a desktop computer. I'm not much of a techie... -- tb |
| captainvideo462009@gmail.com: Jun 26 09:08AM -0700 I have a customer who wants to buy twelve 12.0 volt 8.0 AH gel cells from me. He uses these in his fire alarm panels and wants to keep a quantity in stock for when one of these panels goes down for battery failure. I've explained to him about the need for trickle charging these while they're sitting on the shelf, and rather than sell him 12 individual trickle chargers I was wondering if anyone knows of a cost effective series charger whereby I could put perhaps 6 in series and charge them all at the same time. I would probably not want to go above 6 and I would not do this with anything other than new batteries all of the same type and rating. Thanks, Lenny |
| "Tom Miller" <tmiller11147@verizon.net>: Jun 26 12:17PM -0400 <captainvideo462009@gmail.com> wrote in message news:c2dd3f4d-ca38-479a-b210-21fb8cf4f83e@googlegroups.com... I have a customer who wants to buy twelve 12.0 volt 8.0 AH gel cells from me. He uses these in his fire alarm panels and wants to keep a quantity in stock for when one of these panels goes down for battery failure. I've explained to him about the need for trickle charging these while they're sitting on the shelf, and rather than sell him 12 individual trickle chargers I was wondering if anyone knows of a cost effective series charger whereby I could put perhaps 6 in series and charge them all at the same time. I would probably not want to go above 6 and I would not do this with anything other than new batteries all of the same type and rating. Thanks, Lenny ++++++++++++++++++++++++++++++++++++++++++++++++++++ Gel cells should all be charged in parallel from a constant voltage source. Usually about 13.8 to 14,0 volts. You might install a fuse in each leg of the summing point just to be safe. |
| captainvideo462009@gmail.com: Jun 26 10:46AM -0700 > I have a customer who wants to buy twelve 12.0 volt 8.0 AH gel cells from me. He uses these in his fire alarm panels and wants to keep a quantity in stock for when one of these panels goes down for battery failure. I've explained to him about the need for trickle charging these while they're sitting on the shelf, and rather than sell him 12 individual trickle chargers I was wondering if anyone knows of a cost effective series charger whereby I could put perhaps 6 in series and charge them all at the same time. I would probably not want to go above 6 and I would not do this with anything other than new batteries all of the same type and rating. Thanks, Lenny I was under the impression that parallel charging was not the way to go because it is difficult if not virtually impossible to equalize the current through each battery. Batteries having a lower terminal voltage would draw more current. The inverse would then be true with a higher terminal voltage. In series the entire string gets the same amount of current. Lenny |
| Bennett <bjprice@cal.berkeley.edu>: Jun 26 10:50AM -0700 > On Friday, June 26, 2015 at 12:08:38 PM UTC-4, captainvi...@gmail.com wrote: >> I have a customer who wants to buy twelve 12.0 volt 8.0 AH gel cells from me. He uses these in his fire alarm panels and wants to keep a quantity in stock for when one of these panels goes down for battery failure. I've explained to him about the need for trickle charging these while they're sitting on the shelf, and rather than sell him 12 individual trickle chargers I was wondering if anyone knows of a cost effective series charger whereby I could put perhaps 6 in series and charge them all at the same time. I would probably not want to go above 6 and I would not do this with anything other than new batteries all of the same type and rating. Thanks, Lenny > I was under the impression that parallel charging was not the way to go because it is difficult if not virtually impossible to equalize the current through each battery. Batteries having a lower terminal voltage would draw more current. The inverse would then be true with a higher terminal voltage. In series the entire string gets the same amount of current. Lenny Since the cells in each battery are in series, it seems logical, to me at least, that charging a bunch of batteries in series is appropriate. Or am I missing something? |
| Allodoxaphobia <knock_yourself_out@example.net>: Jun 26 06:29PM On Fri, 26 Jun 2015 10:50:31 -0700, Bennett wrote: > On 6/26/2015 10:46 AM, captainvideo462009@gmail.com wrote: >> On Friday, June 26, 2015 at 12:08:38 PM UTC-4, captainvi...@gmail.com wrote: >>> I have a customer who wants to buy twelve 12.0 volt 8.0 AH gel cells from me. He uses these in his fire alarm panels and wants to keep a quantity in stock for when one of these panels goes down for battery failure. I've explained to him about the need for trickle charging these while they're sitting on the shelf, and rather than sell him 12 individual trickle chargers I was wondering if anyone knows of a cost effective series charger whereby I could put perhaps 6 in series and charge them all at the same time. I would probably not want to go above 6 and I would not do this with anything other than new batteries all of the same type and rating. Thanks, Lenny >> I was under the impression that parallel charging was not the way to go because it is difficult if not virtually impossible to equalize the current through each battery. Batteries having a lower terminal voltage would draw more current. The inverse would then be true with a higher terminal voltage. In series the entire string gets the same amount of current. Lenny > Since the cells in each battery are in series, it seems logical, to me > at least, that charging a bunch of batteries in series is appropriate. > Or am I missing something? Well, isn't a 12V rechargeable battery, itself, a _series-connected_ set of cells -- from 6 to 8 of'em depending on the chemical technology? The OP did say " ...new batteries all of the same type and rating ..." Jonesy |
| Robert Roland <fake@ddress.no>: Jun 26 11:50PM +0200 On Fri, 26 Jun 2015 10:46:48 -0700 (PDT), captainvideo462009@gmail.com wrote: >I was under the impression that parallel charging was not the way to go because it is difficult if not virtually impossible to equalize the current through each battery. Lead (and lithium) based batteries are charged to a specific voltage, and are therefore well suited for parallel operation. During standby charge, you want to control the voltage, not the current. In fact, even if the batteries are not closely matched, you can perfectly well keep them on standby charge in parallel. The battery that has more self-discharge will then automatically draw more current. You can run batteries in series, but they must then be closely matched. A battery is simply a set of closely matched cells connected in series. In your situation, just hook several batteries in parallel and use one charger to keep them all fully charged. To be completely safe, you might want to fully charge them individually before you connect them together. If you connect two batteries with considerably differing charge state, one battery will charge the other at an uncontrolled current. -- RoRo |
| etpm@whidbey.com: Jun 26 05:39PM -0700 On Fri, 26 Jun 2015 23:50:43 +0200, Robert Roland <fake@ddress.no> wrote: >individually before you connect them together. If you connect two >batteries with considerably differing charge state, one battery will >charge the other at an uncontrolled current. And if the batteries are charged in parallel it makes no difference if one is removed. But if charged in series once the customer needs another battery the customer must remove ALL the batteries in that series string from the charger. Eric |
| Phil Allison <pallison49@gmail.com>: Jun 26 08:46PM -0700 Bennett wrote: > Since the cells in each battery are in series, it seems logical, to me > at least, that charging a bunch of batteries in series is appropriate. > Or am I missing something? ** The cells in a particular battery have a great deal in common - eg same origin, age, capacity, number and level of charges and discharges. Various 12 batteries likely have none of the above in common so charging in series will not suit more a than one of them. In the OP's case, with all new and unused batteries of the same type, parallel charging with a fixed maximum voltage of 13.8 is the most practical method as one can use a standard charger. Each battery will initially draw the current it needs until all are fully charged, then the current will taper off to a trickle in each. Gel and SLA cells behave very differently to NiCd and NiMh cells. .... Phil |
| captainvideo462009@gmail.com: Jun 27 06:36AM -0700 > I have a customer who wants to buy twelve 12.0 volt 8.0 AH gel cells from me. He uses these in his fire alarm panels and wants to keep a quantity in stock for when one of these panels goes down for battery failure. I've explained to him about the need for trickle charging these while they're sitting on the shelf, and rather than sell him 12 individual trickle chargers I was wondering if anyone knows of a cost effective series charger whereby I could put perhaps 6 in series and charge them all at the same time. I would probably not want to go above 6 and I would not do this with anything other than new batteries all of the same type and rating. Thanks, Lenny I can imagine haw this might be a concern in high current charging, but how important in float or trickle applications is it that all batteries be fed with the same series resistance, such as equal length leads from the charging source? Lenny |
| "Arfa Daily" <arfa.daily@ntlworld.com>: Jun 27 03:34PM +0100 > charge the other at an uncontrolled current. > -- > RoRo Or place a Schottky diode in series with each charge port, along with the series fuse that someone else suggested, making sure of course that the charge source has sufficient voltage overhead to still allow the battery to reach a full charge voltage level after taking the diode drop into consideration. That way, no battery that's connected can become a charge current source for any other, no matter what their relative charge states are. Arfa |
| Ian Malcolm <See.My.Sig.for.email@totally.invalid>: Jun 27 02:59PM Phil Allison <pallison49@gmail.com> wrote in > Each battery will initially draw the current it needs until all are > fully charged, then the current will taper off to a trickle in each. > Gel and SLA cells behave very differently to NiCd and NiMh cells. *EXACTLY* The charger should be rated for the maximum total AH capacity to be connected to it and needs to be set for SLA batterys and to have a constant float mode. A 12V 10W bulb in series with each battery will prevent excessive current flow allowing discharged batteries to be recharged safely and also provides visual indication of any shorts. -- Ian Malcolm. London, ENGLAND. (NEWSGROUP REPLY PREFERRED) ianm[at]the[dash]malcolms[dot]freeserve[dot]co[dot]uk [at]=@, [dash]=- & [dot]=. *Warning* HTML & >32K emails --> NUL |
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